Senior Software Engineer

Capa is a B2B fintech infrastructure company built to make money movement across Latin America fast, simple, and compliant. We give fintechs and financial operators a single, reliable channel to move pesos and other currencies across the region in real time.
Responsibilities
- Own a backend service (NestJS/TypeORM/Postgres) or frontend module (React/Vite/TanStack) end-to-end, from design through production- Design for money-critical correctness: idempotency, race conditions, reconciliation-safe state transitions- Write integration tests against real Postgres (Testcontainers), not just mocked unit tests, for anything touching money flows- Own AWS infra changes via CDK for the services you own- Design and review API contracts (NestJS + Swagger) and shared TypeScript types across services- Own QA for your own features end-to-end — write and execute the test plan, cover edge cases- Mentor Mid/Junior engineers; review PRs; raise the team's code-quality bar- On-call capable for money-critical paths- Partner with product/compliance on ambiguous, cross-cutting problems (KYB, FX, settlement)
Requirements
- 5+ years professional software engineering, strong TypeScript across backend and frontend (or deep on one side, fluent on the other)- Backend: Node.js + NestJS (or a comparable opinionated framework), an ORM (TypeORM), PostgreSQL, REST API design- Frontend: React, modern data-fetching (TanStack Query or equivalent), component-driven development- AWS fundamentals: Lambda, IAM, KMS, S3, SQS/SNS; comfortable reading/writing CDK or another IaC tool- Testing discipline: understands why integration tests against a real DB matter when correctness has financial consequences
Nice-to-haves
- Fintech/payments/crypto experience (FX, cross-border settlement, ledger/reconciliation, KYC/KYB)- Datadog or comparable observability experience- i18next / multi-market LatAm product experience- Radix/shadcn-style design systems + Tailwind
Interested? Apply here