Senior / Staff Full-Stack Engineer (Node.js + AWS)

Blue Language Labs Inc. is building a protocol for structured, verifiable, multi-party agreements that execute deterministically, leave an immutable audit trail, and run on existing financial rails. Their products include PayNotes, programmable payments with conditional capture, milestone releases, refunds, and partner settlement, and MyOS, orchestration for merchants and agents enabling trusted workflows across systems and organizations.

• Experience with Node.js
• Experience with AWS
• Proficiency in TypeScript
• Experience with React
• Experience with PostgreSQL
• Knowledge of serverless computing
• Understanding of distributed systems
• Familiarity with event-driven architecture
• Experience with CloudFormation

Nice to have:

• Experience with payments
• Experience in fintech
• Knowledge of AI / LLM
• Experience in system design

• Design and ship end-to-end full-stack features across payments, document workflows, and agent orchestration
• Build stateful systems where correctness, auditability, idempotency, and safe retries are first-class concerns
• Own backend services in Node.js and frontend experiences in React/TypeScript
• Design and evolve AWS-based serverless architecture, including reliability, observability, security, and cost decisions
• Define and maintain infrastructure as code using AWS SAM / CloudFormation
• Build and operate PostgreSQL-backed services and event-driven workflows
• Work closely with founders on product and technical decisions
• Use modern AI tooling (LLMs and coding agents) to accelerate development and experimentation
• Take ownership in production: monitoring, debugging, and improving reliability over time