Note: The job is a remote job and is open to candidates in USA. Lumanu is a company that focuses on building a platform for financial technology. They are seeking a Senior Backend Engineer to design and scale their backend services, manage API integrations, and ensure the security of sensitive data.
Responsibilities
- Build and scale backend services in TypeScript on AWS Lambda, backed by PostgreSQL and Hasura GraphQL
- Own the data model and API surface: schema design, migrations, Hasura metadata, permissions, and GraphQL codegen
- Build and maintain integrations with our fintech and compliance partners
- Work with sensitive data (tax IDs, identity documents, payment details) behind encryption and strict access controls
- Implement the logic behind global payouts, W-9/W-8 collection, real-time tax validation, and 1099 generation
- Keep services observable in production with services like Honeycomb and Sentry
- Write tests that earn their keep (Jest for unit and integration, Playwright for end-to-end) and help keep code review standards high
- Ship features alongside product and frontend engineers in a Next.js app, and mentor other engineers as the team grows
Skills
- 5+ years building and running backend systems in production, including services you owned end to end
- Strong TypeScript and Node.js, and comfort designing relational data models in PostgreSQL
- Real experience with GraphQL APIs (Hasura or similar) and good instincts for schema design
- Hands-on AWS experience: Lambda, serverless architectures, and infrastructure as code (we use CloudFormation and the Serverless Framework)
- You take security seriously. Authentication and authorization (we use Auth0 and JWTs), encryption, and careful PII handling should all be familiar ground
- You've integrated third-party APIs and thought hard about retries, idempotency, and what happens when things fail mid-payment
- Good habits around testing, observability, and CI/CD
- You write clearly and can make sensible tradeoffs without much supervision
- You've built or maintained APIs at scale
- A background in fintech, payments, or compliance (KYC, tax, banking, or money movement)
- Familiarity with other parts of our stack: Hasura, Segment, Twilio, SendGrid
- Experience building for users across many countries: multi-currency, internationalization, cross-border payments
Benefits
- Equity
- Unlimited PTO
- Medical, dental, and vision insurance
- 401(k) plan
Company Overview
Company H1B Sponsorship