Software Engineer
Backend Developer (Full-Stack) - Spark Labs (Remote)
Spark Labs is a fully remote software and AI integration company building custom solutions for B2B clients. Customer satisfaction is a top priority at Spark Labs, and every project is measured by how well it serves the client. We’re looking for a self-sufficient, API-focused developer who can own backend systems end to end, has experience handling sensitive healthcare data responsibly, and works directly with customers to turn their needs into reliable software.
What you’ll do:
Design, build, and maintain secure, well-documented APIs and backend services
Build and support systems that handle PHI in compliance with HIPAA
Deploy and operate services on AWS
Build and integrate MCP servers and adapters for AI-enabled workflows
Contribute to frontend work as needed
Work directly with clients to gather requirements, explain technical tradeoffs in plain language, and keep projects on track
Own your work from first conversation through deployment and support, with minimal hand-holding
Our stack
Core: TypeScript, Bun workspaces/runtime, OXC
API:Elysia, OpenAPI, CORS, server timing, OpenTelemetry, MCP adapter
Web: React, TanStack Router/Query/Form/Table/Virtual/Charts, D3, typed API client generated with Hey API/OpenAPI
Identity and policy: Better Auth (organizations, SSO, SCIM, passkeys, Stripe plugin); ZenStack policy tooling plus PostgreSQL RLS
Data: PostgreSQL, Kysely with Bun SQL driver, SQL migrations; planned evaluation of pgAudit, pgvector, and conditional pgactive replication
Requirements:
Strong backend and API development experience with TypeScript and PostgreSQL
Hands-on experience working with PHI and building HIPAA-compliant systems
AWS experience deploying and running production services
MCP experience (building servers, adapters, or integrations)
Excellent communication skills and a genuine commitment to client satisfaction
Self-directed: you manage your own time, ask good questions, and deliver without close supervision
Nice to have:
Full-stack experience, especially React and TanStack
Experience with Bun, Elysia, Better Auth, or ZenStack
Familiarity with OpenTelemetry, PostgreSQL RLS, or multi-tenant authorization
Why Spark Labs
Fully remote, smaller team, real ownership, modern tooling, and direct impact on client outcomes.
This is a contractor position. Opportunity to turn into a direct hire in the future.