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Nir-Yu is a nearshore staffing, recruitment, and Employer of Record (EoR) firm that provides talent to client companies. The job postings are for roles to be placed at their clients (e.g., dealerships, technology firms), rather than for internal corporate functions at Nir-Yu.

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Posted 1mo ago

Senior Backend Engineer - Payments Platform

@ Nir Yu
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Remote, Remote, Mexico
RemoteFull Time
Responsibilities:own backend, build workflows, design APIs
Requirements Summary:6–7 years backend-focused engineering; Node.js REST APIs; PostgreSQL; AWS; OpenAPI; CI/CD; Agile; cross-functional collaboration.
Technical Tools Mentioned:Node.js, REST APIs, PostgreSQL, AWS, OpenAPI/Swagger, CI/CD, Git
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Job Description

The Role:

You are full stack but you live on the backend. You care deeply about what happens when a payment fails, an API returns an unexpected response, or a queue backs up at 2am. You will own the backend services, payment workflows, and event-driven systems that sit at the core of our platform — and you will touch the frontend when the team needs it.

This is a high-intensity role at an early-stage company. This role will ask more of you than a typical engineering job — systems need to stay up, deadlines are real, and the team is small.

Responsibilities:

  • Production Node.js backend services and REST APIs — versioned, contract-stable, and hardened

  • ACH payment workflows end-to-end — debits, credits, retries, failure handling, virtual account ledgering, and reconciliation

  • Event-driven services using AWS SQS and webhooks for reliable asynchronous processing

  • PostgreSQL schemas that support complex financial workflows with integrity under failure

  • CI/CD contributions and test coverage that gives the team genuine confidence to ship

  • Internal React dashboards and operational tooling when needed

  • Design documentation, deployment runbooks, and scalability notes that you write because you are proud of the work — not because someone asked

  • You will occasionally work directly with customers to support integrations, troubleshoot live workflows, and demonstrate platform capabilities — you are comfortable representing the product outside the codebase

Requirements:

Must Have:

  • 6–7 years engineering experience with a strong backend focus

  • Production Node.js and REST API design

  • Solid PostgreSQL — schema design, query optimization, data integrity

  • AWS — Lambda, RDS, SQS, API Gateway, Secrets Manager

  • OpenAPI / Swagger documentation experience

  • Event-driven systems experience — queues, webhooks, retry and failure logic

  • CI/CD pipeline experience and automated deployment workflows

  • You obsess over API design, documentation, deployment, scalability, and observability

  • Cross-functional communicator — comfortable working directly with Product, QA, DevOps, and business stakeholders

  • Agile practitioner — sprint planning, backlog grooming, and code reviews are second nature

  • End-to-end owner — you do not hand off, you follow through to production

Strong Plus:

  • ACH payment workflows and NACHA operating rules

  • Wire, debit card, and real-time payment rail experience beyond ACH

  • Experience with Java, Spring frameworks, or similar enterprise backend frameworks

  • Regulated fintech compliance — audit logging, idempotency, SOC 2

  • NestJS or similar structured Node.js frameworks

  • AI-assisted development tools — Claude, GitHub Copilot, Cursor

  • Team lead experience with mentoring junior team members