Job Search is Senior Software Engineer - Quantitative Buisness A in San Francisco, CA Page 6 of 579

Your search resulted in 5788 "Senior Software Engineer - Quantitative Buisness A" jobs in San Francisco, CA. Save Job SearchSave SearchSave Job Search: Senior Software Engineer - Quantitative Buisness A

Based on your search, we found the following results:

KONG

San Francisco, CAEngineering Cloud Applications /Full-time /RemoteAre you ready to power the World's connections?About the role:Insomnia is a popular API development platform that includes an API client, API designer, API testing and more, that...

6/26/24

Character Technologies

About the roleWe are seeking a talented and creative Software Engineer to join our Safety Engineering team! As a Software Engineering working on Safety Engineering at Character.AI, you ll partner closely with our Trust & Safety, Legal, and Product...

6/26/24

Chan Zuckerberg Initiative

The Chan Zuckerberg Initiative was founded by Priscilla Chan and Mark Zuckerberg in 2015 to help solve some of society s toughest challenges from eradicating disease and improving education to addressing the needs of our local communities. Our...

6/26/24

Robinhood Financial

Join a leading fintech company that s democratizing finance for all.Robinhood was founded on a simple idea: that our financial markets should be accessible to all. With customers at the heart of our decisions, Robinhood is lowering barriers and...

6/26/24

Autodesk

Job Requisition ID #24WD78977Position OverviewAutodesk, the leading Design and Engineering Software Company, is transitioning to the cloud! As a global leader in 3D design, engineering, and entertainment software, Autodesk helps customers imagine,...

6/26/24

Nextdoor

#TeamNextdoorNextdoor is where you connect to the neighborhoods that matter to you so you can belong. Our purpose is to cultivate a kinder world where everyone has a neighborhood they can rely on.Neighbors around the world turn to Nextdoor daily to...

6/26/24

Instabase

At Instabase, we're passionate about democratizing access to cutting-edge AI innovation to enable any organization to solve previously unsolvable unstructured data problems in their industry. With customers representing some of the largest and most...

6/26/24

Kikoff

Looking for an experienced backend software engineer. You will be responsible for core product contributions, rapid-prototyping, and production-release concerns.As a software engineer of a fast-growing fintech startup you are going to move the...

6/26/24

Volkswagen

DescriptionVW. Two letters. Endless opportunities. A bright future.Innovation. Sophistication. Optimization. This is our Passion.Worldwide, the Volkswagen Group has a long tradition of dramatic innovations. The Volkswagen Group with its headquarters...

6/26/24

Waabi

Toronto, CAN, San Francisco, CA & Remote - US & CanadaSoftware Software Engineering /Full-time/ HybridWaabi, founded by AI pioneer and visionary Raquel Urtasun, is an AI company building the next generation of self-driving technology. With a world...

6/26/24

Circle

Circle is a financial technology company at the epicenter of the emerging internet of money, where value can finally travel like other digital data globally, nearly instantly and less expensively than legacy settlement systems. This ground-breaking...

6/26/24

Stytch

What We're Looking ForStytch is the most powerful identity platform built for developers. With advanced features like device fingerprinting and account takeover-resistant authentication, Stytch provides the infrastructure to make your company s...

6/26/24

Hopper

Remote-US / New York, United States / New York City / New Jersey, United States / Seattle / California / San Diego / San Francisco / San Jose / Los AngelesInternational Expansion Engineering /Full-Time /RemoteAbout the jobA stellar opportunity to...

6/26/24

Turo

Turo, Inc. seeks Staff Software Engineer in San Francisco, CA:Job Duties: Collaborate extensively with product management, design, and engineers to develop product features that drive Turo metrics. Produce high-quality maintainable code, test it,...

6/26/24

Hinge Health

San FranciscoRnD Engineering /Regular Full-time /HybridHinge Health is moving people beyond pain by transforming the way it is treated and prevented. Connecting people digitally and in-person with expert clinical care, we combine advanced technology,...

6/26/24

Scale AI

Software is eating the world, but AI is eating software. We live in unprecedented times AI has the potential to exponentially augment human intelligence. Every person will have a personal tutor, coach, assistant, personal shopper, travel guide, and...

6/26/24

Sift Science

About the team:Our Workflows team is responsible for several core functions of Sift s Digital Trust & Safety platform: bulk scoring and routing, up-to-the-minute reporting on business metrics, as well as key customer integration points, all of which...

6/26/24

ThousandEyes

Who We AreThe name ThousandEyes was born from two big ideas: the power to see things not ordinarily possible and the ability to collect insights from a multitude of vantage points. As the world continues its digital transformation and relies more on...

6/26/24

suki

What we want to accomplish and why we need youSuki is creating a new category in the health-tech space: the digital assistant. Our product will be the voice user interface for healthcare. What does that mean? Currently, doctors use electronic health...

6/26/24

Zipline

About ZiplineDo you want to change the world? Zipline is on a mission to transform the way goods move. Our aim is to solve the world s most urgent and complex access challenges by building, manufacturing and operating the first instant delivery and...

6/26/24

Everlaw

Everlaw is looking for a senior frontend software engineer who brings experience building with React+Typescript, a detail-oriented mindset, and humility in their approach. Tackling litigation with technology is a deep challenge that requires search,...

6/26/24

Asset Mark

Job Description:AssetMark is a leading strategic provider of innovative investment and consulting solutions serving independent financial advisors. We provide investment, relationship, and practice management solutions that advisors use in helping...

6/26/24

DataBricks

P-118At Databricks, we are passionate about enabling data teams to solve the world's toughest problems from making the next mode of transportation a reality to accelerating the development of medical breakthroughs. We do this by building and running...

6/26/24

worldcoin.org

About the Company:Worldcoin () is an open-source protocol, supported by a global community of developers, individuals, economists and technologists committed to expanding participation in, and access to, the global economy. Its community is united...

6/15/24

Amgen

Career CategoryScientificJob DescriptionHOW MIGHT YOU DEFY IMAGINATION?If you feel like you re part of something bigger, it s because you are. At Amgen, our shared mission to serve patients drives all that we do. It is key to our becoming one of the...

6/26/24

Candid Health

What you ll be doingYou ll conceptualize, design, build, and maintain complex services/platforms/features and develop ownership over large swaths of our product + infrastructure.You ll interact closely with our current + prospective customers,...

6/27/24

GlaxoSmithKline

The Onyx Research Data Platform organization represents a major investment by GSK R&D and Digital & Tech, designed to deliver a step- change in our ability to leverage data, knowledge, and prediction to find new medicines. We are a full-stack shop...

6/26/24

Adobe Systems

Our CompanyChanging the world through digital experiences is what Adobe s all about. We give everyone from emerging artists to global brands everything they need to design and deliver exceptional digital experiences! We re passionate about empowering...

6/26/24

PATCH

San FranciscoEngineering /Full-time /On-siteAbout PatchPatch is the platform scaling unified climate action, empowering companies of any size to help rebalance the planet while advancing their business initiatives. We provide pathways to do so...

6/26/24

Airbnb

Airbnb was born in 2007 when two Hosts welcomed three guests to their San Francisco home, and has since grown to over 4 million Hosts who have welcomed more than 1 billion guest arrivals in almost every country across the globe. Every day, Hosts...

6/26/24

Loom

OverviewWorking at AtlassianAtlassian acquired Loom to lead in remote first, asynchronous work. With Loom's async video expertise and Atlassian's team collaboration understanding, we aim to innovate and empower customers for richer collaboration.

6/26/24

LiveRamp

LiveRamp is the data collaboration platform of choice for the world s most innovative companies. A groundbreaking leader in consumer privacy, data ethics, and foundational identity, LiveRamp is setting the new standard for building a connected...

6/25/24

Tanium

The BasicsAs a senior-level integrations developer at Tanium, you will build and maintain integrations between Tanium and its partners with a focus on Microsoft technologies as part of a development team. Tanium focuses on a customer engagement model...

6/26/24

Trove Information Technologies

Why join Pave?At Pave, our vision is simple - Make Compensation Fair. How are we going to get there? By building the most intelligent compensation platform, powered by the largest real-time compensation dataset on earth.We partner with our customers...

6/26/24

GoodRX

GoodRx is America s healthcare marketplace. Each month, millions of people visit goodrx.com to find reliable health information and discounts for their healthcare and we ve helped people save $35 billion since 2011. We provide prescription discounts...

6/26/24

ROBLOX

Every day, tens of millions of people come to Roblox to explore, create, play, learn, and connect with friends in 3D immersive digital experiences all created by our global community of developers and creators. At Roblox, we re building the tools and...

6/26/24

C3 IoT

C3.ai, Inc. (NYSE:AI) is a leading provider of Enterprise AI software for accelerating digital transformation. The proven C3 AI Platform provides comprehensive services to build enterprise-scale AI applications more efficiently and cost-effectively...

6/26/24

NOAH MEDICAL

Who We AreNoah Medical is building the future of medical robotics. Our next generation robotic platform targets early diagnosis and treatment of patients across multiple indications. We are looking for exceptional engineers and key team members. Our...

6/26/24

MasterClass

Who we are:MasterClass is the streaming platform where the world s best come together so anyone, anywhere, can access and be inspired by their knowledge and stories. We put you in the room with the creators, thinkers, makers and leaders who have...

6/26/24

Capital One

Center 3 (19075), United States of America, McLean, VirginiaSenior Software Engineer, BEDo you love building and pioneering in the technology space? Do you enjoy solving complex business problems in a fast-paced, collaborative, inclusive, and...

6/27/24

Snowflake Computing

Build the future of data. Join the Snowflake team.SENIOR SOFTWARE ENGINEER - STREAMLIT OPEN SOURCESnowflake started with a clear vision: develop a cloud data platform that is effective, affordable, and accessible to all data users. Snowflake...

6/26/24

Atlassian

6/27/24

GHD

Bring your curiosity and determination to make a positive impact on the future of transport, and we ll help you go all the way.Our Concord, CA offices has an excellent opportunity for a Senior Project Engineer/Project Manager Highways and Roads. This...

6/26/24

Meta

Meta is seeking AI Software Engineers to join our Research & Development teams. The ideal candidate will have industry experience working on Language related topics. The position will involve taking these skills and applying them to solve for some of...

6/26/24

SingleStore

Position OverviewThe SingleStore database engine team is responsible for building the core database engine behind SingleStore. This includes developing in-memory and on-disk data structures and algorithms, row and columnar stores, networking, query...

6/27/24

Taulia

Taulia's Commitment:Diversity, Equity, and InclusionIt is our duty to create and advance a diverse and inclusive company where all Taulians feel they are celebrated. All individuals are welcomed, free to express themselves and rewarded for showing up...

6/26/24

GoForward

San Francisco, CAEngineering Software /Full-time/ On-siteForward is on a bold mission to make high quality healthcare available to a billion people across the globe. We re building the world s most advanced healthcare platform from the ground up,...

6/26/24

Airwallex

At Airwallex (airwallex.com), we re building the future of global finance on one platform. Founded in 2015 in Melbourne, Airwallex is the leading financial technology platform for modern businesses to grow beyond borders. With one of the world s most...

6/26/24

Sigma Computing

About the RoleWe are growing the engineering team and looking for engineers who have the experience to build and deliver world-class technology. You will be part of an accomplished team of engineers with a shared mission to make data easily...

6/26/24

Discord

This position is US based only.Come build the future of Discord s business with us! We are looking for impact-focused engineers to join our world-class Revenue group as we accelerate Discord s growth through the creation of compelling paid products.

6/26/24

Checkr

About CheckrCheckr builds people infrastructure for the future of work. And we believe everyone should have a fair chance to work. That's why we've designed a faster and fairer way to screen job seekers. Established in 2014 and valued at $5B, Checkr...

6/26/24

King Digital Entertainment

Staff Software Engineer (Data)Category Data, Analytics & StrategyLocation San Francisco, California, United States of AmericaJob ID R023150widget RegularDescriptionCraft:Data, Analytics & StrategyJob Description:Your Role Within the Kingdom Embrace...

6/26/24

Niantic

Niantic s mission is to use emerging technology to enrich our experiences as human beings in the physical world. We build products that inspire movement, exploration, and face-to-face social interaction.Niantic is seeking Full Stack Engineers of all...

6/26/24

Viant Technology

Irvine, CA / Los Angeles, CA / Seattle, Washington / San Francisco, CATechnology & Development Engineering /Full-time /HybridWHAT YOU LL DOViant s customers use the Demand Side Platform (DSP) to set up, run and monitor ad campaigns. As a Sr. Software...

6/26/24

Zoox

Foster City, CASoftware Calibration, Localization & Mapping /Full-time/ HybridOur Calibration, Localization, and Mapping (CLAMS) team is responsible for building the algorithms and tools necessary for keeping Zoox vehicles well calibrated, always...

6/26/24

Dealpath

Dealpath is the industry's most trusted purpose-built real estate platform. It empowers hundreds of leading institutions including: Blackstone, AEW, Oxford Properties, Principal Real Estate, Nuveen, and Bridge Investment Group to invest in the built...

6/26/24

DoorDash

About the TeamDoorDash is a data driven organization and relies on timely, accurate and reliable data to drive many business and product decisions. The Data Platform owns all the infrastructure necessary to run an operationally efficient analytical...

6/26/24

Apex Focus Group

Now accepting applicants for Focus Group studies. Earn up to $750 per week part-time working from home. Must register to see if you qualify. No Data Entry experience needed. Data Entry Clerk Work From Home - Part Time Remote Focus Group...

6/23/24

About Pinterest: Millions of people across the world come to Pinterest to find new ideas every day. It s where they get inspiration, dream about new possibilities and plan for what matters most. Our mission is to help those people find their...

6/26/24

Gusto

About GustoGusto is a modern, online people platform that helps small businesses take care of their teams. On top of full-service payroll, Gusto offers health insurance, 401(k)s, expert HR, and team management tools. Today, Gusto offices in Denver,...

6/26/24

Cruise Automation

We're Cruise, a self-driving service designed for the cities we love.We re building the world s most advanced self-driving vehicles to safely connect people to the places, things, and experiences they care about. We believe self-driving vehicles will...

6/26/24

CyberCoders

Seattle, WA Los Angeles, CA San Francisco, CA Austin, TX New York, NYRemote Available Full-time $150,000.00 - $185,000.00Posted 06/18/2024Job Title: Senior Software Engineer (Frontend)Location: 100% REMOTESalary: $150,000 - $185,000/year plus EQUITY...

6/26/24

MongoDB

The worldwide data management software market is massive (According to IDC, the worldwide database software market, which it refers to as the database management systems software market, was forecasted to be approximately $82 billion in 2023 growing...

6/26/24

Quizlet

Los Angeles, CA; Seattle, WA; San Francisco, CAEngineering Android /Full-time /HybridAbout Quizlet:Inspired by our belief that anyone can learn anything and powered by our own curiosity, we build the smartest tools we can imagine to help students...

6/26/24

Dexterity

Redwood CityEngineering Software /FT /On-siteAs a Staff/Senior Software Engineer you will be running a distributed, low-latency, full stack robotics system. Everyday you will design, build, and support features that empower machine learning...

6/26/24

Instawork

At Instawork, we re driven by our vision to create economic opportunity for local businesses and skilled hourly professionals in communities around the world. With a growing number of hub cities across the world in the U.S., Canada, India, and...

6/26/24

joby aviation

Joby OverviewLocated in Northern California, the team at Joby Aviation is driven by our goal of creating an affordable, all-electric air transportation system. Imagine a piloted air taxi that takes off vertically, then quietly carries you and your...

6/26/24

Gilead Sciences

For Current Gilead Employees and Contractors:Please log onto your Internal Career Site to apply for this job.At Gilead, we re creating a healthier world for all people. For more than 35 years, we ve tackled diseases such as HIV, viral hepatitis,...

6/26/24

USPS

Excellent benefits such as health, dental, and vision insurance. No eperience required. Paid holidays and paid time off. Delivers and collects mail on foot or by vehicle under varying road and weather conditions in a prescribed area;...

6/26/24

Humane

Who We AreHumane is a team of proven industry experts who have invented, built, and shipped category-defining hardware and software products to billions of people across the globe. We're known for building the audacious, ambitious, and the...

6/26/24

Willdan

The future is now, Willdan is Envisioning the Future of clean energy and infrastructure as well as sustainability through our work with cities, buildings, and transportation. Willdan is a national leader in energy, engineering, and software...

6/25/24

SPAN

Our Mission SPAN develops products that accelerate the rapid adoption of renewable energy in the home. The flagship SPAN Smart Panel is the first true evolution for the traditional home electric panel, harnessing enhanced technology for metering,...

6/26/24

Varo Money

US Remote / Charlotte, NC / Salt Lake City, UT / San Francisco, CATechnology Back-End Engineering /Full-time /HybridVaro is an entirely new kind of bank. All digital, mission-driven, FDIC insured and designed for the way our customers live their...

6/26/24

Segal

Are you passionate about delivering trusted advice that improves lives? Are you inspired by solving for mysteries in pharmacy benefits data? This opportunity may be for you! Our...

6/16/24

TaskRabbit

Taskrabbit will never use text or chat applications to conduct interviews. We have a thoughtful and interactive interview process that includes an initial recruiter phone screen and several video-based interviews with our hiring teams. Communications...

6/26/24

Aurora Innovation

Who We AreAurora (Nasdaq: AUR) is delivering the benefits of self-driving technology safely, quickly, and broadly to make transportation safer, increasingly accessible, and more reliable and efficient than ever before. The Aurora Driver is a...

6/26/24

Guidewire Software

United States - San Mateo, CAProduct Development and Operations /Full-time/ HybridWho Are We?The Guidewire team, now more than 3,200 strong, is an Internet-scale, Cloud native, Realtime data platform built for Property and Casualty insurance industry...

6/26/24

Frontapp

Front is the modern customer service platform that helps companies delight their customers, engage their teams, and build stronger businesses. We ve reimagined the help desk for real-time team collaboration across every customer communication...

6/15/24

Covariant

Emeryville, CAEngineering Software /Full-time /HybridTHE COMPANYOur mission is to build the Covariant Brain, a universal AI to give robots the ability to see, reason and act on the world around them. Bringing AI from research in the lab to the...

6/26/24

Benchling

Biotechnology is rewriting life as we know it, from the medicines we take, to the crops we grow, the materials we wear, and the household goods that we rely on every day. But moving at the new speed of science requires better technology.Benchling s...

6/26/24

Anyscale

About Anyscale:Anyscale provides a development platform intended to simplify distributed computing. This enables software developers of all skill levels to build applications that run at any scale from a laptop to the data center. We're...

6/26/24

Genentech

The PositionA healthier future. It s what drives us to innovate. To continuously advance science and ensure everyone has access to the healthcare they need today and for generations to come.Creating a world where we all have more time with the people...

6/26/24

Electronic Arts

Requisition Number:181635Position Title:Sr Software Engineer IExternal Description:Cliffhanger Games is a newly formed Seattle Studio focusing on blockbuster action-adventure games and pioneering next-generation emergent storytelling beginning with...

6/26/24

Box

WHAT IS BOX?Box is the market leader for Cloud Content Management. Our mission is to power how the world works together. Box is partnering with enterprise organizations to accelerate their digital transformation by creating a single platform for...

6/26/24

Chronos Consulting

Job DescriptionChronos Consulting s client is seeking a motivated self-starter to help drive adoption of multi-cloud services and solutions as part of their transformation journey to the public cloud. You possess hands-on experience, designing, and...

6/25/24

eBay

At eBay, we're more than a global ecommerce leader we re changing the way the world shops and sells. Our platform empowers millions of buyers and sellers in more than 190 markets around the world. We re committed to pushing boundaries and leaving our...

6/26/24

Sumo Logic

Location- open to 100% remoteThe proliferation of machine log data has the potential to give organizations unprecedented real-time visibility into their infrastructure and operations. With this opportunity comes tremendous technical challenges around...

6/26/24

Youtube

Minimum qualifications:Bachelor s degree or equivalent practical experience. 2 years of experience with software development in one or more programming languages, or 1 year of experience with an advanced degree in an industry setting. 2 years of...

6/27/24

Associates Systems LLC

The candidate will perform technical planning, system integration, verification and validation, cost and risk, and supportability and effectiveness analyses for total systems. Analyses are performed at all levels of total system product to include:...

6/21/24

Poshmark

Confidence can sometimes hold us back from applying for a job. Here s a secret: there's no such thing as a "perfect" candidate. Poshmark is looking for exceptional people who want to make a positive impact through their work and help create an...

6/26/24

Rockset

San Mateo, CAEngineering Software /Full Time/ HybridABOUT ROCKSETAt Rockset, we ve built the real-time analytics database for the world's data applications. Our team and technology come from a rich heritage, rooted in the experience of building...

6/26/24

Frito-Lay

Welcome to the Latest Job Vacancies Site 2020 and at this time we would like to inform you of the Latest Job Vacancies from the Frito-Lay North America with the position of Route Sales Representative - Frito-Lay North America which was opened this.

6/26/24

Cisco Systems

About The RoleAs a Senior Engineer on the AI Ops team, you will be responsible for building the next-generation routing engine for the Internet using Data Science, Machine Learning (ML), and Artificial Intelligence (AI). The size, diversity, and...

6/26/24

Loft Orbital

San FranciscoFlight Systems Flight Software /Full time /HybridWanna join the adventure?We're developing the platform that enables our customers to develop software onboard satellites. We need individuals who: have experienced projects done at scale;...

6/26/24

Carta

The Company You ll JoinCarta is a platform that helps people manage equity, build businesses, and invest in the companies of tomorrow. Our mission is to unlock the power of equity ownership for more people in more places. Carta is trusted by more...

6/26/24

Visa

Company DescriptionVisa is a world leader in payments and technology, with over 259 billion payments transactions flowing safely between consumers, merchants, financial institutions, and government entities in more than 200 countries and territories...

6/26/24

Cambly

About Cambly: Our mission is to bring high-quality English education to every English learner in the world. We're working on giving talented English tutors AI superpowers to change the lives of their learners. Come help us build the world's best...

6/26/24

FIS Global

Position Type : Full time Type Of Hire : Experienced (relevant combo of work and education) Education Desired : General Equivalency Diploma Travel Percentage : 0% ...

6/26/24

Lowe's

All Lowes associates deliver quality customer service while maintaining a store that is clean, safe, and stocked with the products our customers need. As a Receiver/Stocker, this means:, Being friendly and professional, and responding quickly to...

6/26/24

Datadog

Product Marketing Managers at Datadog are an integral part of the Product and the Marketing orgs. PMMs partner with Product Managers to bring new products to market. From go-to-market strategy for new products and features, to creating the content...

6/20/24

Modern Treasury

OVERVIEWThis position is based out of San Francisco Bay Area or New York City. We're looking for a software engineer focusing on core infrastructure to join the Modern Treasury Engineering team. In this role, you will be building the infrastructure...

6/26/24

Workday

Your work days are brighter here.At Workday, it all began with a conversation over breakfast. When our founders met at a sunny California diner, they came up with an idea to revolutionize the enterprise software market. And when we began to rise, one...

6/26/24

Pepsi

This labor-intensive position is responsible for hand building pallets of product for bulk, and route trucks. Each type of loading requires strict attention to order accuracy with respect to loading outgoing trucks and unloading incoming trucks.

6/26/24

Coca-Cola Refreshments

The Sales Merchandiser (SM) is responsible for replenishing, merchandising, and ordering products at all designated accounts. The Sales Merchandiser is the primary Coke Florida associate in customer accounts to continuously stock and order Coke...

6/26/24

Guidehouse

Job Family:Data Science ConsultingTravel Required:Up to 10%Clearance Required:Ability to Obtain Public TrustWhat You Will Do:Guidehouse s Data Science team helps clients maximize the value of their data and automate business processes. This high...

6/25/24

EarnUp

EarnUp is on a mission to create a financial system that works for everyone by transforming the loan payments ecosystem into a key driver for achieving financial wellness. We do this through our customer centric and data driven payments platform by...

6/26/24

CYNGN

Menlo Park, CASoftware - Autonomy Software - Autonomy /Full-Time /HybridAbout CyngnBased in Menlo Park, CA, Cyngn is a publicly-traded autonomous vehicle company. Whether a warehouse floor, mine, or construction site, our self-driving technology can...

6/26/24

Walgreens

As a Customer Service Associate, you are the face of Walgreens the person who helps fulfill our mission of making people's lives a little easier. Along with providing friendly, courteous and efficient service to our customers, Customer Service...

6/26/24

FedEx

Full and part time postions available. We offer a flexible schedule, insurance benefits, and a fast paced exciting work place where you can refine your skills.At FedEx Office, team members with a passion for delivering the best customer service, who...

6/26/24

Etsy

Company DescriptionEtsy is the global marketplace for unique and creative goods. We build, power, and evolve the tools and technologies that connect millions of entrepreneurs with millions of buyers around the world. As an Etsy Inc. employee, whether...

6/26/24

Search Filters