Fullstack Developer

На данный момент Senior Software Engineer.

Мои компетенции и опыт

Ethan Lim

Singapore | нужен доступ к резюме | нужен доступ к резюме | нужен доступ к резюме

Summary

Versatile Fullstack Developer with 10+ years of experience delivering high-performance web applications across international markets. Skilled in NestJS, TypeORM, PostgreSQL, React, нужен доступ к резюме , and TypeScript, with a strong foundation in AI/ML integrations, SaaS platforms, and API-driven architectures. Adept at optimizing server infrastructure, implementing business logic, and scaling complex systems while mentoring teams and improving developer workflows. Proven ability to enhance reliability, performance, and maintainability of fullstack solutions in fast-paced, collaborative environments.

Experience

Rescode | Senior Software Engineer May 2022 ~ Present

• Developed and maintained backend services using NestJS and TypeORM, improving API response speed by 35%.
• Implemented PostgreSQL database optimizations, increasing query efficiency by 42%.
• Designed and integrated business logic algorithms, enabling new AI-driven functionalities.
• Connected backend with external APIs, including payment gateways and mail services, reducing integration time by 25%.
• Enhanced server scalability, reducing downtime by 18%.
• Implemented security measures, mitigating potential vulnerabilities and attacks.
• Built frontend interfaces using React, нужен доступ к резюме , and Redux, improving PageSpeed indicators by 30%.
• Developed unit and integration tests covering 92% of codebase, reducing production bugs by 37%.
• Mentored 4 junior engineers, improving team productivity and code quality.
• Collaborated with Product and Design teams to define architecture and roadmap for new features.
• Documented code and architecture for backend and frontend systems.
• Optimized data flows between frontend and backend, improving user experience metrics.
• Implemented CI/CD pipelines for automated deployments, reducing delivery time by 20%.
• Resolved production incidents, achieving нужен доступ к резюме % uptime.
• Conducted performance profiling and debugging across fullstack stack.
• Integrated ML service endpoints, improving recommendation engine performance.
• Defined reusable component libraries for frontend, reducing development time for new pages by 28%.
• Coordinated cross-team sprints and planning sessions to align goals and deliverables.
• Improved API response latency through caching and query optimizations.
• Introduced coding standards and best practices across backend and frontend.
• Actively contributed to code reviews and architecture discussions, enhancing maintainability.
• Streamlined external API authentication and request handling, improving reliability by 22%.

Doodle Labs | Senior Full Stack Engineer Apr 2019 ~ Apr 2022

• Developed fullstack solutions with NestJS, React, and TypeScript for SaaS applications serving 500K+ users.
• Designed PostgreSQL schemas and optimized queries, improving performance by 33%.
• Integrated multiple third-party APIs for payment, communication, and analytics services.
• Implemented frontend optimizations, boosting PageSpeed scores by 25%.
• Introduced Redux patterns and нужен доступ к резюме features to enhance state management and SSR performance.
• Built CI/CD pipelines with automated testing to ensure reliable deployments.
• Mentored junior engineers and conducted code reviews to maintain high code quality.
• Applied security best practices across server and client applications.
• Collaborated with Product, AI, and Design teams to implement new features efficiently.
• Implemented unit and integration tests for backend and frontend, achieving 90% coverage.
• Reduced bug rates by 28% through rigorous QA and automated tests.
• Refactored legacy code into maintainable modules using TypeScript best practices.
• Monitored system performance and optimized backend processes to handle high concurrency.
• Documented APIs, business logic, and system architecture for team-wide knowledge sharing.
• Participated in sprint planning and backlog refinement to prioritize impactful features.
• Designed reusable frontend components, accelerating new page development by 20%.
• Improved server response times through caching and asynchronous processing.
• Enhanced developer experience by providing internal tooling for testing and debugging.
• Conducted workshops and training sessions to upskill team members on new technologies.
• Contributed to product roadmap discussions with measurable impact metrics.

Wise | Full Stack Engineer May 2015 ~ Feb 2019

• Built scalable fullstack applications using нужен доступ к резюме , React, and TypeScript for financial services.
• Implemented backend services with PostgreSQL, optimizing queries for low-latency responses.
• Developed frontend features with React and Redux, improving user engagement metrics by 18%.
• Designed and integrated APIs with third-party services for payments and notifications.
• Created unit tests and ensured 85%+ code coverage, reducing critical bugs in production.
• Improved CI/CD workflows for automated testing and deployment.
• Mentored junior developers in best practices and TypeScript adoption.
• Refactored legacy code to modular, maintainable architectures.
• Collaborated with cross-functional teams on feature specifications and implementation.
• Enhanced system monitoring and logging, reducing incident resolution time by 35%.
• Implemented secure authentication and authorization for user-facing applications.
• Built reusable frontend components and libraries for internal use.
• Participated in architecture discussions, contributing to scalable platform design.
• Optimized backend processes to handle high-volume transactions efficiently.
• Delivered client-facing features with measurable improvements in performance and usability.

Education

National University of Singapore Aug 2009 ~ Jul 2013

Bachelor’s Degree in Computer Science

Skills

• Backend & Server Development: NestJS, нужен доступ к резюме , TypeScript, TypeORM, PostgreSQL, API integration, business logic implementation, server optimization, security best practices
• Frontend & UI Development: React, нужен доступ к резюме , Redux, HTML5, CSS3, CSS Modules, TypeScript, performance optimization
• AI/ML & Data Processing: Integration with ML services, algorithm implementation, data-driven workflows
• DevOps & Tools: GitHub Actions, Yarn, CI/CD pipelines, Docker, Linux, Windows
• Testing & Quality: Unit Testing, Jest, Mocha, debugging, code documentation, architecture documentation
• Collaboration & Leadership: Agile workflows, planning new functional requirements, mentoring, cross-functional communication, code reviews