Lead Engineer - Full Stack (Mobile)

The candidate will have responsibilities across the following functions:

Core Product and Platform Development:

• Design, build, and maintain scalable backend systems powering core user journeys (buy, sell, logistics, payments).
• Develop and maintain high-quality mobile applications (Android / iOS / cross-platform).
• Own end-to-end development from architecture to deployment and monitoring.
• Write clean, maintainable, and well-tested code.
• Ensure high system reliability, performance, and security.

System Design and Scale:

• Design systems that handle high concurrency, large datasets, and real-time operations.
• Optimise database performance, queries, and data models.
• Build for scale from day one while keeping systems simple.
• Continuously improve system architecture and engineering standards.

Team Leadership and Mentorship:

• Guide and mentor junior engineers through code reviews and design discussions.
• Help prioritise tasks and ensure high-quality execution across the team.
• Set engineering standards and enforce best practices.
• Act as a technical anchor for the team.

Cross-functional Collaboration:

• Work closely with product, design, and operations to translate requirements into robust systems.
• Build internal tools and workflows that improve operational efficiency.
• Collaborate with finance/logistics teams on integrations (payments, tracking, reconciliation).

Ownership and Execution:

• Take full ownership of features and systems from idea to production.
• Ship fast, iterate based on feedback, and improve continuously.
• Debug production issues and ensure quick resolution with minimal disruption.

Engineering Excellence:

• Set high standards for code quality, testing, and documentation.
• Review code and mentor junior engineers.
• Drive best practices across the engineering team.
• Contribute to building a strong engineering culture at Circle.

Mobile Engineering:

• Build intuitive, fast, and reliable mobile experiences for users.
• Ensure strong app performance, responsiveness, and offline reliability.
• Collaborate with engineering and design/product teams to oversee seamless UX.
• Continuously improve app stability, crash rates, and release quality.

Requirements:

• 5+ years of experience in software engineering.
• Bachelor's degree in Computer Science or related field (or equivalent experience).
• Strong experience in the backend stack, Node.js .
• Experience building and shipping mobile apps (React Native / Flutter).
• Solid understanding of databases, APIs, and system design.
• Experience working with production systems, deployments, and debugging.
• Experience with version control (Git) and collaborative development workflows.
• Prior experience mentoring or leading engineers is a strong plus.