Full Stack Developer (TypeScript)

We are looking for a Full Stack Developer based in Latin America to work on a long-term project for one of our clients, a Fintech company based in Los Angeles, California.

Our client is on a mission to build products that level the financial playing field. Their banking app helps millions of members bank, budget, find work, build credit, and access up to $500 advances without paying a fee.

Responsibilities

Design, build, and maintain backend systems powering member account management and cross-product interactions. Build and evolve GraphQL APIs in a federated microservice environment: schema design, resolver implementation, entity extensions, DataLoader usage, and backward-compatible changes. Drive modernization initiatives, including legacy and large-scale data migrations with safe rollout plans. Contribute to feature design early, ensuring risk and architectural considerations are built in from the start. Deliver high-quality code incrementally through well-scoped PRs. Write thorough unit, integration, and e2e tests; conduct effective code reviews. Identify and resolve performance issues in new and existing code. Communicate trade-offs clearly and proactively seek clarity on priorities when needed. Requirements

Advanced Level of English 6+ years of software development experience, with a strong focus on backend engineering and distributed systems. 5+ years of hands-on experience with TypeScript and Node.js, building scalable, production-grade backend services and APIs. 3+ years of experience with MySQL and cloud platforms, preferably GCP. Experience with microservices and federated architecture. Experience with GraphQL, Apollo/Yoga, gateways, schema registries, or composition tools. Experience with ReactJS and JavaScript. Ability to explain system architecture and component design. Experience leading the migration of legacy applications to modern microservices-based architectures. Collaborative team player. Bonus Points

Bachelor’s Degree in Computer Science, Systems Engineering or related fields. Experience with large-scale data migrations, dual-write/read patterns, and backfills. FinTech experience. What we offer

Long term positions. Compensation in USD. Paid time off. Cool clients and products. Work with great engineers. 4tech