About Blue Language LabsEvery 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.PayNotes — 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.The RoleYou 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.What you get?Competitive B2B compensation based on experienceEquity — own a piece of what you buildFully remote work in an async-first environmentDirect collaboration with the founding teamHigh autonomy and fast decision-makingSmall team, outsized impactWork on technology that is genuinely novelEnd-to-end ownership across product, systems, and productionProtocols don't get built by committees. They get built by small teams who understood the problem before anyone else did.What You'll DoDesign and ship full-stack features across payments, document workflows, and agent orchestrationBuild and maintain stateful systems that demand idempotency, auditability, and safe retry logicOwn AWS infrastructure — architecture decisions, serverless systems, IaC (SAM / CloudFormation), monitoring, cost, and securityWork with PostgreSQL-backed services and event-driven componentsUse modern AI tooling (LLMs and coding agents) to accelerate development and experimentationRequirements7+ years of experience building and shipping production systems as a full-stack engineerStrong backend expertise in Node.js and TypeScript — not just building APIs, but designing systems that stay correct under load and failureStrong frontend skills with React, including the ability to build polished, production-ready product interfaces without depending on a separate frontend teamSolid understanding of distributed systems: consistency, state transitions, concurrency, retries, failure handling, and eventual consistency trade-offsProven experience building stateful, event-driven systems where correctness mattersHands-on experience with AWS in production, especially Lambda, API Gateway, SQS/SNS, EventBridge, IAM, CloudWatch, RDS, and serverless architecture patternsStrong experience with Infrastructure as Code, ideally AWS SAM and CloudFormationStrong PostgreSQL skills, including schema design, transactions, indexing, migrations, and performance tuningExperience designing systems with idempotency, auditability, and deterministic execution built in from the startAbility to debug and stabilize production systems end-to-end — across application code, infrastructure, data, and runtime behaviorStrong grasp of observability, monitoring, logging, alerting, and incident responseGood judgment around security, reliability, and cloud cost, with the ability to make pragmatic architectural trade-offsAbility and willingness to own features end-to-end — from product shaping to implementation, deployment, and post-release accountabilityComfortable operating in a high-trust, high-autonomy environment with very little hand-holdingStrong product and engineering judgment — you ask the right questions early, and you do not need heavy process to move fast responsiblyComfortable using LLMs, coding agents, and modern AI tooling as part of your development workflowFluent English and Polish, written and spokenNice to haveExperience in payments, fintech, ledgering, settlement, or transactional systemsExperience with document workflows, approvals, or multi-party business processesExperience working on systems of record or products with strict audit/compliance expectationsExperience at an early-stage startup or in a small, high-talent engineering teamExperience building products where reliability and system correctness matter more than shipping surface-level featuresJ-18808-Ljbffr
