Senior Fullstack Developer

Senior Fullstack Developer – React Native (Homebased) Join Outsourced , a leading ISO‑certified offshore outsourcing company, to build a mobile platform that lets users create, play, and share AI‑generated mini‑games. As the sole developer on a small team, you will own end‑to‑end product development, from a React Native iOS app to an Azure backend, AI integration, quality, analytics, ops, and releases. About the Role You will work closely with a product manager and designer, report directly to the founder/CEO, and ship features with deep ownership, minimal meetings, and true product responsibility. Responsibilities Own the product end‑to‑end: build, ship, and maintain the React Native iOS app (Android later), including performance, UX polish, crash‑free stability, and App Store releases. Design, implement, and operate backend services on Microsoft Azure (Functions/App Service/Containers), APIs (Node/TypeScript preferred), and MongoDB (Atlas or Azure‑hosted). Integrate and optimize OpenAI/Anthropic calls, including prompting, function/tool use, streaming, fallbacks, retries, cost/latency controls, and rate‑limit resilience. Evolve from one‑shot code generation to iterative, editor‑style pipelines (diff/apply loops, partial regeneration, self‑critique, guardrails). Design LLM evaluation and online/offline experiments (heuristics, unit tests, human‑in‑the‑loop review, A/B tests tied to gameplay/retention metrics). Ship user‑facing features: author prompts, flows, and UI to help users express intent and edit/iterate their games; build the feed and sharing loops. Own CI/CD, testing (unit/e2e), monitoring, alerting, and incident response. Implement secure secret management (e.g., Azure Key Vault), model‑usage controls, and sandboxing/guardrails for executing generated code. Ensure the app complies with all App Store policies. Write design docs, make architectural decisions, and maintain high code quality (type safety, reviews, docs). Collaborate closely with the PM/Designer; provide engineering input on roadmap, scoping, and trade‑offs. Establish lightweight, async‑friendly engineering rituals suitable for a high‑ownership, tiny team. Qualifications 7+ years professional software development, with 3+ years building and shipping mobile apps (React Native strongly preferred; native iOS/Android familiarity a plus). 3+ years building/operating cloud‑hosted backends and MongoDB (schema design, indexes, performance). Hands‑on LLM production experience: integrating OpenAI/Anthropic, designing fallbacks/retries, handling rate limits, and implementing evaluation/experimentation to improve model outputs. Demonstrated ability to own a product end‑to‑end as the primary (or only) engineer: architecture, delivery, CI/CD, monitoring, and incident response. Strong TypeScript skills; code quality mindset (tests, design docs, reviews, maintainability). Fluency in English (written & spoken) with the ability to discuss complex, abstract product/AI concepts clearly and concisely. High ownership, product sense, and bias for action; comfortable making pragmatic trade‑offs in a startup environment. Nice to Have Experience with iterative code generation systems (e.g., AI IDE/Cursor‑style editing loops, program repair, or agentic workflows). Game development exposure (2D gameplay loops, physics, asset pipelines) in JS/TypeScript or engines (Unity, Cocos, Phaser). Sandboxing/guardrails for running untrusted code (e.g., JS sandboxes, WASM, resource quotas). Performance tuning for React Native (bridges, animations, memory), and native modules. Shipping to Android and handling App Store/Play Store submission nuances at scale. Cost optimization for LLM workloads (prompt refactors, caching, token budgets). Work Schedule Tuesday–Saturday, 7:00 AM – 3:00 PM PH Time. Location Home‑based; equipment is provided. Must have a strong internet connection (minimum 20 Mbps). Background Check As part of our recruitment process, we conduct a background check on all hired candidates. Please prepare and submit all required documents promptly. #J-18808-Ljbffr