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# Senior Full Stack Engineer

- **Company:** ChainIT Inc.
- **Location:** United States (Remote available)
- **Experience:** Expert
- **Salary:** $90,000.0 - $145,000.0
- **Contract:** Permanent contract
- **Skills:** JavaScript (Programming Language), Application Programming Interfaces (APIs), Amazon Web Services, Cloud Computing, Databases, Command-Query Responsibility Segregation (Software Development), DevOps, Github, PostgreSQL, Node.Js, Object-Relational Mapping, Query Optimization, RabbitMQ, Role-Based Access Control, Redis, Blockchain, Next.js, Tokenization, TypeScript, Openapi, Tailwind, ReactJS, Grafana, Cypress (Programming Language), Backend, Agentic-AI, Webpack, Sentry, Ethereum, Web3.js, React Native, NestJS, Restful APIs, Docker, Microservices
- **Published:** October 22, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=f3e40552e952885c

## About the Role

* Depth shipping full-stack features to production, typically 5+ years, mostly in TypeScript
 * Strong Node.js backend experience in a structured framework (ideally NestJS), including contract-first REST API design
 * Production React experience, including modern data fetching, forms and schema validation
 * Hands-on work with message-driven systems and patterns like CQRS, sagas or the outbox pattern
 * Solid PostgreSQL: schema design, migrations, query tuning and transactions, with an ORM
 * Secure-by-default habits around auth, secrets and sensitive data
 * Working knowledge of AWS and Docker, and a steady testing practice from unit to end-to-end
 * Clear writing, and comfort working remotely with a distributed team that includes an external development partner

## Description

Monday, you ship a change to the identity service. By Friday, it's inside a college athlete's payout, a signed agreement and an age check.

That's the reach of ChainIT. One core platform, backed by 15 granted U.S. patents, powers nine products. Every transaction and every agent action it touches becomes an immutable, append-only record, verified for people, businesses and AI agents alike. Truth Over Trust. The blockchain stays underneath. Your work is identity, payments and compliance software.

What you'll build

You'll own features end to end: the service, the API contract and the React screen, shipped as one piece of work. You'll join a new in-house team alongside our development partner, the Staff Backend and Staff DevOps engineers we're hiring, and our product managers, and help set the bar for how we build.

Services

 * Build core-platform services for identity, business verification, payments, agreements and tokenization, with real care for idempotency, retries, migrations and data boundaries.
 * Design and version the APIs product teams depend on, and integrate server-side blockchain operations where a product needs them.

Apps

 * Build admin consoles, customer-facing PWAs, onboarding portals, a tokenized-asset marketplace and embeddable verification and payment widgets.
 * Get sign-in, sessions and role-based access right, and make status views, forms and error states solid where one mistake means a failed verification or a stuck payment.

The stack you'll work in (and shape) You don't need every item here. This is what's on the bench.

 * Backend: TypeScript, Node.js and NestJS 10 (CQRS, hexagonal layering), ~25 microservices in an Nx monorepo, REST with OpenAPI; RabbitMQ, Redis and Bull, Centrifugo
 * Data: PostgreSQL with TypeORM 0.3 and per-service databases; an append-only ledger for Validated Data Token records
 * Web and mobile: React 18 and 19, Vite and Next.js, Tailwind, TanStack Query, react-hook-form, Zod; React Native
 * Identity and Web3: AWS Cognito (migrating from Auth0), JWT with org-scoped RBAC, AWS Rekognition; ethers v6, Alchemy, KMS-backed signing on Polygon and Ethereum
 * Cloud, observability and testing: AWS (EKS, Helm, CDK, KMS), GitHub Actions, Vercel; Sentry, pino, Grafana, Prometheus; Jest and Cypress