SDK Engineer, JavaScript

Supabase

JavaScript/TypeScript SDK Engineer building open-source developer tools for Supabase’s Postgres platform. Owning SDK APIs, type systems, runtimes, realtime, releases, and public documentation.

Posted 8/5/2026full-timeRemote • 🌎 Anywhere in the WorldMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expert-level proficiency in TypeScript and experience in building and maintaining SDKs with a focus on public APIs and open-source contributions. Capable of managing project scope, release automation, and ensuring accurate type resolution across various environments.

Highest-signal resume keywords

Expert-Level TypeScriptOpen-Source Project MaintenanceRelease AutomationFluency with NPM PackagingStrong Written Communication

ATS Keywords

Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills

JavaScriptTypeScriptWebSocket FunctionalityUnit TestingEnd-to-End TestingSemantic VersioningDual ESM/CJS BuildsType ResolutionIssue TriagePublic API Development

Soft Skills

Autonomous WorkClear CommunicationProblem SolvingAdaptabilityCollaboration in Distributed Teams

Tools & Technologies

NodeDenoBunCloudflare WorkersReact NativeExpoCI/CD ToolsPublic RepositoriesRFC WritingDocumentation

Industry Keywords

SDK DevelopmentReal-Time FunctionalityChangelogsMigration GuidesPublic Issue Responses

Tech Stack

Tools & technologies

JavaScriptNode.jsReactReact NativeTypeScript

About the role

Key responsibilities & impact

Build and evolve Supabase’s JavaScript and TypeScript SDKs
Identify missing platform capabilities, make the case for them, and build new features
Triage inbound issues and review and shepherd outside contributions in public repositories
Maintain CI and release automation and manage project scope
Ensure generated database types flow correctly through client APIs for accurate autocomplete and inference
Support Node, Deno, Bun, browsers, Cloudflare Workers, and React Native/Expo runtimes
Maintain dual ESM/CJS publishing and correct type resolution across module resolution modes
Develop realtime functionality involving WebSocket connections, reconnection, subscriptions, and presence semantics
Keep SDKs aligned with changes to auth, realtime, storage, PostgREST, and edge runtime services
Write RFCs, migration guides, release notes, changelogs, and documentation
Make SDKs legible to AI coding agents

Requirements

What you’ll need

Expert-level TypeScript, including generics, conditional types, and mapped types
Authored or maintained a published library with a public API and external consumers
Experience working on open-source projects from the maintainer side
Experience with issue triage, outside pull-request reviews, release automation, changelogs, semantic versioning, and security reports
Fluency with npm packaging, dual ESM/CJS builds, export maps, and type resolution
Testing experience across unit, type-level, and end-to-end tests against a real stack
Strong written communication for design documents, changelogs, and public issue responses
Ability to work autonomously: identify, scope, and ship important work
Ability to communicate clearly across technical and non-technical audiences
Experience in async or globally distributed teams
Comfortable navigating ambiguity and moving quickly
Energized by solving real-world problems for developers

Benefits

Comp & perks

Fully remote work
WeWork membership or co-working allowance usable anywhere in the world
ESOP (equity ownership) for every team member
Tech allowance for laptop, monitor, headphones, or other work-environment needs
Health insurance: 100% coverage for employees and 80% for dependents
Annual company off-sites
Flexible, asynchronous work
Annual education allowance for courses, books, conferences, or other learning