Remote Senior Developer Experience (DevEx) Engineer (AI & Platform)

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Job Title: Remote Senior Developer Experience (DevEx) Engineer (AI & Platform) (100% Work From Home) Location: Remote from Latin America Position Type: Full-time Salary: $4,500 - 5,000 USD/month Schedule: Monday - Friday, 9:00 AM – 6:00 PM Central Time (CT) Job Overview Our Client is a lean, senior-heavy engineering team executing a high-stakes architectural re-platform: moving the business logic of a live travel-operations platform out of the browser and onto a server-authoritative core (NestJS + PostgreSQL on GCP), closing long-standing security gaps, and migrating off a NoSQL store — all while the existing system keeps running and generating revenue.

The target is a modular monolith with clean internal domain boundaries (deliberately not a microservices sprawl), fronted by separate modular web apps per concern. The foundation is already built and running in code; the work ahead is the harder middle — the money paths.

To maintain velocity without sacrificing system integrity, the team aggressively adopts AI-augmented development, with automated guardrails and long-term maintainability prized over short-term output.

The Role Our Client is seeking a pragmatic Senior Developer Experience (DevEx) / Platform Engineer to be the internal "AI Governance" champion and the owner of the safety, testing, and migration infrastructure behind the re-platform.

The primary customers are the internal engineering team, not end-users.

Instead of building product features, the successful candidate builds the test harnesses, migration tooling, CI/CD pipelines, and AI guardrails that let a small senior team change a high-stakes codebase — including with tools like Cursor — without breaking the things that carry revenue.

A concrete mandate, not a generic developer-happiness role: make the system safe to change, and keep it fast to change.

Key Responsibilities Safety nets & testing Builds the characterization / golden-master test infrastructure around the critical "money paths" — pricing, payment status, and the accounting engine.

Today these run as large, untested client-side services; characterizing them means extracting that logic, capturing real input fixtures, and building the parity oracle the new server-side modules must match before cutover.

This is a blocking prerequisite for the next phase of the rebuild — high-impact, early work. Advocates for automated testing as the backbone of the migration, and brings the judgment to preserve existing behavior (including known bugs) until a deliberate decision changes it.

Keeps long-term system health and architectural consistency across the modules of the monolith.

Data migration Continues and completes the migration of live data from a NoSQL store (Firestore) to PostgreSQL — building on a migration already underway (real schema, TypeORM migrations, and reference data already moving) toward the harder transactional and financial data, with reconciliation and a clean, reversible cutover.

This is a substantial migration of money-bearing data, not a schema exercise.

AI governance & tooling Collaborates with the Tech Lead to write and enforce architectural rules (e.g. .cursorrules) governing how AI assistants interact with the codebase — and codifies where AI-assisted changes are safe versus where they require careful human review (the accounting and pricing logic are the danger zones).

Integrates AI review tools into the pull-request process to summarize changes, catch errors, and enforce standards. Continuously evaluates new AI developer tools, APIs, and CLI utilities to remove operational bottlenecks.

Platform & developer velocity Automates module/service scaffolding consistent with the monolith's conventions (NestJS modules, DTOs, migrations, CI/CD config). Implements automated quality gates in deployment pipelines: linting, type-checking, and mutation testing.

Identifies and removes friction in the day-to-day engineering loop across the API, shared packages, and the frontend apps.

Qualifications, Skills and Key Competencies Required Core stack: Strong Node.js and TypeScript with NestJS experience, and real PostgreSQL depth — schema design, query performance, and migrations under load (the team uses TypeORM).

Data migration: Hands-on experience migrating from NoSQL to SQL (or comparable live data migrations), ideally zero-downtime and with reconciliation.

Testing for legacy code: Expert understanding of automated testing and CI/CD — especially characterization / golden-master testing of untested or organically-grown code, including the pragmatics of extracting entangled logic to make it testable.

AI automation: A track record of scripting with LLM APIs or CLI tools to automate infrastructure, generate documentation, or analyze codebases. Infrastructure: DevOps / Platform Engineering / Backend Architecture experience with Docker, GCP, and GitHub Actions.

Soft skills: High emotional intelligence and diplomacy; the ability to work effectively with protective, highly experienced senior engineers.

Maintainability mindset: Long-term system health and clean code, with pragmatism scaled to a small team (the simplest thing that works, not the enterprise-grade thing). Strong pluses GCP / Firebase familiarity (the migration is specifically off Firestore).

Angular experience (the frontend apps and shared SDK are Angular). Experience integrating with third-party financial or operational APIs (e.g. accounting systems).

Our Client's Tech Stack Backend: Node.js, TypeScript, NestJS, TypeORM, Docker, modular-monolith architecture Databases: PostgreSQL (GCP Cloud SQL), migrating from Firebase / Firestore Frontend (context, not the focus of this role): Angular, Ionic, Tailwind CSS, a shared component SDK Cloud & CI/CD: Google Cloud Platform (GCP), GitHub Actions AI tooling: Cursor (AI IDE), AI code-review agents (e.g.

CodeRabbit), LLM APIs Why Join This Team? Technical impact: Shape how a senior engineering team builds software in the age of AI, with an unusually direct line of sight from your work to the business.

Modern workflow: Work at the forefront of AI-augmented development, with the guardrails that make it actually safe. Real momentum: Join a re-platform whose foundation is already built and running — your work unlocks the critical next phase rather than starting from zero.

Professional autonomy: Own the DevEx roadmap, the safety infrastructure, and internal tooling. Stability: Long-term remote contract with a high-caliber, senior team.

Application Disclaimer: Please Read Before Proceeding To ensure a fair and efficient hiring process, all applications must meet the mandatory requirements listed in the job description.

Voice/Video Recording is REQUIRED Your application CANNOT be considered without a voice or video recording. It must be at least 30 seconds long and in English. Submissions in any other language or missing a recording will be automatically disqualified.

Mandatory Knockout Questions Each application includes knockout questions designed to verify minimum qualifications required by the client.

If you answer "NO" to any of these, you will be immediately disqualified from the hiring process for not having the experience requested for the role.

Please note that the citizenship question is also a knockout if you answer "YES" as we are only able to hire Latin American talent based in Latin America.

Apply Wisely To maintain fairness, please apply to no more than three jobs and only if you fully meet the listed qualifications. Applying to roles you don’t qualify for will not improve your chances and may affect future applications.

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