Senior​/Full-Stack Engineer; Node.js + AWS

About Blue Language Labs

Every generation gets one protocol moment. TCP/IP. SMTP. HTTP. A small team writes the spec, ships the first implementation, and fifteen years later the entire world runs on it without knowing who built it. We’re at that moment for economic coordination.

AI agents are being deployed everywhere, right now — negotiating, committing, paying, settling on behalf of every company that wants to stay competitive. In a few years there will be billions of them. The problem: there is no protocol for what happens between them. An agent can be smart. It cannot be governed. It can pay. It cannot make a payment conditional on something that actually happened.

Agents from different organizations can talk. They cannot safely coordinate across company boundaries.

Nobody has built that layer. We’re building it.

Blue is a protocol for structured, verifiable, multi‑party agreements that execute deterministically, leave an immutable audit trail, and run on existing financial rails. Smart contracts without blockchain. Governance without a platform. Trust without a middleman.

• Pay Notes — programmable payments with conditional capture, milestone releases, automatic refunds, and partner settlement. Logic embedded directly into money movement.
• MyOS — orchestration layer for merchants and agents. Agentic workflows and cross-platform trust, without touching the protocol directly.

You will own features end-to-end — from the React component a merchant clicks to the Lambda function that settles their transaction to the AWS infrastructure that keeps it all standing. No handoffs between "front" and "back". No waiting for someone else to unblock you.

This is a high‑trust, high‑autonomy role. You'll work directly with the founding team, your decisions will ship to production fast, and yes — you’ll be on the hook when something breaks.

• Competitive B2B compensation based on experience
• Equity — own a piece of what you build
• Fully remote work in an async‑first environment
• Direct collaboration with the founding team
• High autonomy and fast decision‑making
• Small team, outsized impact
• Work on technology that is genuinely novel
• End-to-end ownership across product, systems, and production

• Design and ship full‑stack features across payments, document workflows, and agent orchestration
• Build and maintain stateful systems that demand idempotency, auditability, and safe retry logic
• Own AWS infrastructure — architecture decisions, serverless systems, IaC (SAM / Cloud Formation), monitoring, cost, and security
• Work with Postgre
  
  SQL‑backed services and event‑driven components
• Use modern AI tooling (LLMs and coding agents) to accelerate development and experimentation

• 7+ years of experience building and shipping production systems as a full‑stack engineer
• Strong backend expertise in Node.js and Type Script — not just building APIs, but designing systems that stay correct under load and failure
• Strong frontend skills with React, including the ability to build polished, production‑ready product interfaces without depending on a separate frontend team
• Solid understanding of distributed systems: consistency, state transitions, concurrency, retries, failure handling, and eventual consistency trade‑offs
• Proven experience building stateful, event‑driven systems where correctness matters
• Hands‑on experience with AWS in production, especially Lambda, API Gateway, SQS/SNS, Event Bridge, IAM, Cloud Watch, RDS, and serverless architecture patterns
• Strong experience with Infrastructure as Code, ideally AWS SAM and Cloud Formation
• Strong Postgre
  
  SQL skills, including schema design, transactions, indexing, migrations, and performance tuning
• Experience designing systems with idempotency, auditability, and deterministic execution built in from the start
• Ability to debug and stabilize production systems end‑to‑end — across application code, infrastructure, data, and runtime behavior
• Strong grasp of observability, monitoring, logging, alerting, and incident response
• Good judgment around security,…