Lead Full-stack Developer (Full-Time Remote Contractor)

Headquarters: Amman, Amman Governorate, Jordan Our client is looking for an experienced, detail-oriented Lead Full-Stack Developer to join us as a full-time remote contractor and become an integral part of our small, fast-moving team. You’ll take ownership of an existing mobile app codebase and lead hands-on architecture and development across the product backlog, shipping new features, maintaining the production system, and improving the platform’s robustness as we scale to a significantly larger user base. The product is built with React Native / Expo and Firebase, including Firestore, and integrates significantly with Google Calendar. You’ll collaborate directly with the Founder, CTO, and Product Manager to help drive the feature set, translate requirements into clean technical solutions, and ensure releases are stable, well-tested, and well-documented. You’ll report to the CTO and play a key role in shaping how we grows. This role is ideal for someone who loves building consumer products end-to-end, thrives in fast-paced startup environments, and takes pride in technical excellence, clear communication, and reliable delivery. What You’ll Do Architecture & Technical Leadership - Take ownership of the existing React Native / Expo and Firebase codebase, ensuring it remains stable, maintainable, and well-structured - Lead hands-on architecture decisions to improve scalability, performance, reliability, and development velocity, with the alignment and support of the CTO - Identify and address technical debt; evolve the architecture to support rapid feature development and a large increase in the user base - Establish and refine engineering best practices (e.g. coding standards, review process, release hygiene) Full-Stack Development (Mobile, Backend, Web) - Implement new features and enhancements from the product backlog across mobile and backend systems - Build and maintain Firebase/Firestore data models, security rules, and backend logic as needed - Work deeply with Google Calendar syncing and related integrations to ensure data accuracy and a smooth user experience - Contribute to future web implementation needs, requiring proficiency in React and ability to shape a consistent cross-platform architecture - Troubleshoot production issues, implement fixes, and continuously improve app performance and stability Delivery, Quality, and Collaboration - Collaborate closely with the Founder, CTO, and Product Manager to clarify requirements, explore tradeoffs, and drive practical solutions that align with product goals - Break down initiatives into clear technical tasks and provide accurate estimates and delivery plans - Maintain a high bar for quality, including unit testing, edge cases, regression safety, and release readiness - Communicate progress clearly and proactively, surfacing risks early and proposing solutions DevOps, CI/CD, and Documentation - Configure and maintain CI/CD pipelines for mobile and related services to support consistent, repeatable releases - Improve deployment workflows, build reliability, and release automation - Write and maintain technical documentation: architecture notes, setup guides, runbooks, and key system decisions - Ensure the team can operate and scale the system confidently through clear documentation and clean engineering practices What We’re Looking For - 8+ years of professional software development experience, including significant hands-on full-stack work - Proven experience owning and evolving a production codebase in a fast-paced environment - Strong React Native/Expo experience and modern JavaScript/TypeScript proficiency - Strong Firebase experience, including Firestore data modeling and best practices for performance and security - Experience integrating with third-party APIs and sync workflows. Google Calendar experience is a major plus. - Strong React experience for future web implementation, and comfort designing shared patterns across platforms - Experience designing scalable, ro