Supabase
Posted 3w ago

SDK Engineer - JavaScript

Supabase
United States
RemoteFull Time
Responsibilities
  • building SDKs
  • triaging issues
  • owning types
Requirements
  • Expert-level TypeScript and library authoring experience
  • Npm packaging
  • Testing
  • Open-source maintenance
  • Strong written communication, and autonomy in distributed teams
Technical tools mentioned
TypeScriptJavaScriptPostgresNodeDenoBunCloudflare WorkersReact NativeExpoWebSocketnpmESMCJSEdge Functions

Job description

About Supabase

Supabase is the Postgres development platform, built by developers for developers. We provide a complete backend solution including Database, Auth, Storage, Edge Functions, Realtime, and Vector Search. All services are deeply integrated and designed for growth.

About the Role

We're looking for a JS SDK Engineer to join the SDK team and own a core part of how
developers talk to Supabase from JavaScript and TypeScript.

Our JS/TS SDKs are the front door to the platform: database queries, auth, storage, realtime
subscriptions and edge functions, used by a very large number of developers and by most of the
AI coding tools building on Supabase today.

This is a library-authoring role, and the work happens in the open: public repos, public issue
trackers, and API decisions whose consequences are permanent. The type system here is a design surface rather than a formality. If you get satisfaction from an inference that Just Works,
from a migration guide that saves people an afternoon, and from an issue tracker that isn't a
graveyard, you'll like it here.

This role is ideal for someone who thrives in async, fast-paced environments and is excited
about building developer tools that scale to millions.

What You’ll Do

  • Build and evolve our JS/TS SDKs.

  • Start new things. Alongside the maintenance work, you're expected to find what's missing, make the case for it, and build it. Some of what we ship next doesn't exist yet,
    and nobody will hand you the list.

  • Work in the open. These are public repos: you'll triage inbound issues, review and
    shepherd outside contributions, keep CI and release automation healthy, and hold a clear,
    kind line on scope.

  • Own the type experience. Keep generated database types flowing correctly through the
    client APIs so autocomplete and inference stay correct in real codebases.

  • Keep us honest across runtimes. Node, Deno, Bun, browsers, Cloudflare Workers, React
    Native/Expo, including dual ESM/CJS publishing and types that resolve correctly under every module resolution mode. Test it, don't assume it.

  • Work on realtime. Long-lived WebSocket connections, reconnection, and subscription and
    presence semantics.

  • Track the platform. When auth, realtime, storage, postgrest or edge-runtime ship a
    change, make sure the SDKs reflect it, and that we say so in the changelog.

  • Design in public. Write the RFCs, migration guides, release notes and docs. Treat a
    breaking change as a deprecation path plus a migration story, not a version bump.

  • Make our SDKs legible to AI coding agents, which are now a major consumer of them.

What We’re Looking For

  • Expert-level TypeScript. You use generics, conditional and mapped types as design tools,
    you can explain why an inference breaks.

  • You've authored or maintained a published library with a public API and consumers outside
    your own company. You know what it costs to change something people depend on.

  • You've worked on open-source projects and know the maintainer side of them. Issue triage at volume, reviewing outside PRs, release automation, changelogs and semver, security reports, and saying no to a feature request without losing the person who asked.

  • npm packaging fluency: dual ESM/CJS builds, export maps, type resolution, semver discipline, and the failure modes consumers actually hit.

  • Testing as a habit: unit, type-level and end-to-end against a real stack. Every fix comes
    with a regression test.

  • Strong written communication. Design docs, changelogs and issue replies are a large part
    of the output here, much of it public, and we're async by default.

  • Real autonomy: you find the important work, scope it, ship it, and say what you didn't
    do.

  • Communicate clearly across both technical and non-technical audiences

  • Have experience in async or globally distributed teams

  • Are energized by solving real-world problems for developers

  • Are comfortable navigating ambiguity and moving quickly

What We Offer

  • Fully Remote

    We hire globally. We believe you can do your best work from anywhere. There are no Supabase offices, but we provide a WeWork membership or co-working allowance you can use anywhere in the world.

  • ESOP

    Every team member receives ESOP (equity ownership) in the company. We want everyone to share in the upside of what we’re building together.

  • Tech Allowance

    Use this budget to set up your ideal work environment—laptop, monitor, headphones, or whatever helps you do your best work.

  • Health Benefits

    Supabase covers 100% of health insurance for employees and 80% for dependents, wherever you are. Your wellbeing and your family’s health are important to us.

  • Annual Off-Sites

    Once a year, the entire company gathers in a new city for a week of connection, collaboration, and fun. It’s a highlight of our year.

  • Flexible Work

    We operate asynchronously and trust you to manage your own time. You know what needs to be done and when.

  • Professional Development

    Every team member receives an annual education allowance to spend on learning—courses, books, conferences, or anything that supports your growth.

About the Team

Supabase was born-remote and open-source-first. We believe our globally distributed team is our secret weapon in building tools developers love.

  • ~400 team members

  • 60+ countries

  • 20+ languages spoken

  • Over $1B raised (including our $500M Series F)

  • 540,000+ community members

We move fast, build in public, and use what we ship. If it’s in your project, we probably use it in ours too. We believe deeply in the open-source ecosystem and strive to support—not replace—existing tools and communities.

About Supabase

Developer platform providing Postgres databases, authentication, storage, realtime, REST APIs, and edge functions for application developers.

Similar jobs

SDK Engineer roles
1w
Save
Mark Applied
Hide
SDK Engineer
San Jose or United States
$221k-$229k/yr HybridFull Time
Zoom Voice Communications
Zoom Voice CommunicationsNasdaq Global Select Market: ZM: American publicly traded communications platform serving businesses and individuals with AI-assisted video, voice, chat, and phone services.
4+ YOEBachelor’s degree in computer science, information security, or related field; 4 years of related experience with C/C++, VoIP, network protocols, debugging, memory analysis, and software development tools.
C, C++, Windows Performance Analyzer (WPA), Checkmarx, User-Mode Dump Heap (UMDH), Wireshark, Microsoft Visual Studio, Valgrind, Flame Graph, TCP, UDP, TLS, RTP, SRTP, RCTP, RFC2833, RFC3550, RFC 5760, SIP, PJSIP, reSIProcate, FreeSWITCH, IDE
6mo
Save
Mark Applied
Hide
SDK Software Engineer, AI
United States or Oakland
$146k-$235k/yr RemoteFull Time
LaunchDarkly
LaunchDarkly: B2B feature-management software helping engineering teams safely manage code releases and AI agents in production.
5+ YOEExperience building libraries and packages; 5+ years in Python and TypeScript; AI SDK experience; strong CS fundamentals; open-source contributions.
Python, TypeScript, OpenAI SDK, Vercel AI SDK
2w
Save
Mark Applied
Hide
Senior React SDK Developer
Skopje or Amsterdam or Boulder
RemoteFull Time
Stream
Stream: Private technology providing APIs and SDKs for chat, video, audio, feeds, and moderation to app developers.
Experience with React, TypeScript, open-source developer tools, browser and framework performance, accessibility, performance optimization, and testing. Startup experience is preferred.
React, React Chat, Feeds, Video SDKs, TypeScript, RxJS, WebRTC, Protobuf, Twirp, OpenAPI, React Virtuoso, React Markdown, Remark, WASM, WebWorkers, Vitest, Jest, Playwright, React Native, Angular, Vue
2mo
Save
Mark Applied
Hide
Mobile SDK Developer
New York, New York, United States
$150k-$185k/yr OnsiteFull Time
Kargo
Kargo: Private advertising technology helping brands and publishers run premium campaigns across mobile, CTV, social, and web.
5+ YOE5+ years software engineering experience with mobile app advertising tech, strong knowledge of mediation, bidding, SDK integrations, OpenRTB, in-app rendering, debugging full in-app stack, and performance optimization.
OpenRTB, WebViews
6mo
Save
Mark Applied
Hide
Software Engineer, SDK
United States or Canada
RemoteFull Time
Keycard Labs
Keycard Labs: Private cybersecurity providing identity and access infrastructure for developers and enterprises securing AI agents.
Build and maintain the Keycard SDKs across languages; strong systems engineering; experience with libraries/SDKs; multi-language proficiency.
Go, Python, TypeScript, Rust, OpenAPI, protobuf, smithy
6mo
Save
Mark Applied
Hide
CJA/Web SDK Engineer
United States
RemoteFull Time
Blue Acorn iCi
Blue Acorn iCi: Digital experience consulting firm helping global brands improve customer experiences, commerce, and customer intelligence.
Experience implementing Adobe Web SDK and Adobe Experience Platform data collection; CJ Analytics datasets; strong analytics instrumentation, governance, and collaboration.
Adobe Web SDK, Adobe Experience Platform, RTCDP, Journey Optimizer, AJO
10y
Save
Mark Applied
Hide
Mobile SDK Engineer
Portland, Oregon, United States
OnsiteFull Time
Rave
Rave: Private San Francis software providing a social-graph SDK and hosted platform for mobile game publishers.
Experience in mobile SDK development with a focus on iOS, Android, or Unity.
iOS, Android, Unity, Web SDK
2mo
Save
Mark Applied
Hide
Loan IQ SDK Senior Lead Developer - Senior Vice President
Jersey City or Charlotte or Irving or Tampa
$177k-$265k/yr HybridFull Time
Citi
CitiNYSE: C: Global financial services organization enabling growth and economic progress.
10+ YOE10+ years Loan IQ SDK and API development, hands-on daily coding, REST/JMS/SOAP/Microservices experience, Spring Boot, messaging platforms (Kafka/TIBCO/IBM MQ), strong SQL and Java skills, CI/CD experience, Bachelor's required, Master's preferred.
Loan IQ SDK, REST, JMS, SOAP, Microservices, Spring Boot, Swagger, Tomcat, JSON, XML, Kafka, TIBCO, IBM MQ, SQL, Windows, Linux, shell, batch, Java, JDBC, OOP, OOD, GoF design patterns, CI/CD