Full-Stack Software Engineer (AI-Native) - Part-time - LATAM/NA

Company & Role Context

Client is a seed-stage startup building a track-and-trace platform for the cash-in-transit / logistics industry. The fractional CTO is looking to work with a seasoned AI native fullstack developer to deliver the MVP. This role owns execution: turning validated specs into a working MVP — web platform, a companion mobile app for a specific field use case, and backend integrations with external systems.

The CTO cares about judgment and output, not watching someone type. Expect to work AI-first: agentic coding tools and spec-driven workflows are the default way of building here, not an add-on.

Responsibilities

• Build and ship a full MVP: web front end, backend, mobile companion app, and third-party integrations (ETL/middleware).
• Work primarily through AI-assisted, spec-driven development — turning PRD/user stories into shipped code using agentic coding tools, not line-by-line manual coding.
• Operate inside a BMAD-style (or equivalent) agentic framework: think in user stories, iterative delivery, and structured spec hand-off to AI agents rather than freeform prompting.
• Exercise engineering judgment on architecture and trade-offs — including where AI agents can be trusted to execute autonomously and where a human needs to step in.
• Communicate directly and clearly with a hands-on, technical founder/CTO; no layers of translation needed.
• Scale hours up or down with project velocity; this may become full-time or convert to a permanent hire.

Required

• 3–6 years of professional software engineering experience — enough to have real judgment, not so senior/expensive that AI-leverage isn't the point.
• Demonstrated, hands-on use of agentic coding tools to actually ship product (not just experimentation) — this matters more than raw coding speed.
• Direct experience with BMAD or a comparable spec-driven, multi-agent agile framework, OR deep familiarity with the underlying mindset (waterfall/agile discipline, user stories, continuous delivery) and genuine willingness to adopt BMAD.
• Full-stack range: has independently built front end, back end, and at least one integration end-to-end (not siloed to one layer).
• Proficiency in at least one of: Python, TypeScript/Node.js, Go; comfort with Docker, CI/CD, Git.
• Strong spoken and written English — communication is a stated dealbreaker for this client.
• Comfortable with ambiguity: specs are still evolving; this isn't a fully-scoped ticket queue.

Nice to Have

• Mobile development experience, ideally Flutter; Android-only experience is acceptable and valued (industry is Android-heavy) even without iOS.
• Logistics / supply chain / track-and-trace domain exposure.
• Cash-in-transit (CIT) industry background — SmartSafes, cash counters, deposit/reconciliation workflows.
• Fintech integration experience.
• Prior solo or small-team experience shipping a product from spec to production (vs. large-team feature work).