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

Senior Software Engineer with over 10 years of experience designing and delivering scalable web systems using нужен доступ к резюме (Express, нужен доступ к резюме ), React, and microservice architectures. Proven track record integrating complex third-party APIs including CRMs, messengers, and external services with secure OAuth/JWT authentication. Skilled in Redis, MongoDB, and MySQL optimization for performance and reliability, improving throughput by up to 60%. Adept at CI/CD GitLab pipelines, containerization with Docker, and mentoring teams in code quality and documentation. Ready to contribute immediately to building future-facing AI-powered business automation systems.

Experience

Rescode | Senior Software Engineer May 2022 ~ Present

• Developed нужен доступ к резюме microservices using Express and нужен доступ к резюме powering enterprise-grade data integrations.
• Built REST APIs integrating third-party CRMs and messengers, supporting 200K+ active connections daily.
• Refactored legacy endpoints to async architecture reducing API latency by 40%.
• Designed Redis-based job queues to manage background tasks with fault tolerance and retry strategies.
• Created CI/CD pipelines with GitLab for automated testing and zero-downtime deployments.
• Containerized production services using Docker improving scalability and deployment efficiency.
• Implemented JWT and OAuth2 authentication across multiple APIs to secure data exchange.
• Optimized MongoDB queries and indexes, improving read performance by 55%.
• Integrated MySQL migrations using нужен доступ к резюме ensuring reliable schema versioning.
• Built real-time analytics dashboards using React and WebSockets for system monitoring.
• Improved CI test reliability with Jest and Supertest reducing false positives by 35%.
• Collaborated closely with frontend and DevOps teams to unify API contracts and reduce incidents.
• Conducted peer code reviews enforcing consistent TypeScript and architectural standards.
• Automated service documentation via Swagger/OpenAPI for developer onboarding.
• Participated in design discussions to define scalable microservice boundaries and communication flows.
• Introduced caching layers in Redis, lowering request response time to <100 ms.
• Delivered нужен доступ к резюме % uptime SLA through resilient service design and observability tooling.
• Mentored junior developers in backend principles, CI/CD usage, and testing best practices.

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

• Built fullstack web solutions using нужен доступ к резюме , нужен доступ к резюме , and React for internal and client-facing tools.
• Developed integrations with multiple APIs for communication and data synchronization between systems.
• Designed and deployed REST endpoints for device management across distributed systems.
• Improved performance of Redis-based caching reducing response latency by 45%.
• Implemented CI/CD GitLab pipelines cutting release time from 40 min to under 5 min.
• Architected MongoDB and MySQL data models ensuring optimal indexing and referential integrity.
• Coordinated with cross-functional teams to plan and deliver product features on time.
• Developed a secure OAuth2 authentication flow unifying access across internal APIs.
• Conducted code reviews and enforced consistent ESLint and Prettier formatting rules.
• Deployed containerized services via Docker and Kubernetes for scalability and portability.
• Automated integration tests for REST APIs raising coverage above 85%.
• Collaborated on frontend optimization with React and MobX improving load times by 30%.
• Documented microservice communication protocols reducing onboarding time by 50%.
• Created analytics tooling to monitor API usage trends and detect anomalies early.
• Supported migration of monolithic codebases into independently deployable microservices.

Wise | Full Stack Engineer May 2015 ~ Feb 2019

• Developed RESTful нужен доступ к резюме APIs and React UIs serving financial operations teams globally.
• Built integrations with external systems and CRMs using OAuth-secured endpoints.
• Designed Redis-based job scheduling for asynchronous transaction processing.
• Optimized MySQL schema and queries reducing report generation time by 35%.
• Refactored backend logic to adopt нужен доступ к резюме modules improving code reuse.
• Implemented automated builds and deployments with Docker and GitLab CI/CD.
• Developed frontend dashboards with React and Tailwind for customer insight visualization.
• Created real-time notification systems for operational monitoring using WebSockets.
• Conducted extensive unit and integration testing achieving 90% coverage.
• Collaborated with product teams to define functional API specifications.
• Deployed services to containerized environments improving reliability under high load.
• Participated in agile sprint planning and estimation ensuring consistent delivery velocity.
• Authored technical documentation for internal APIs and deployment guides.

Education

National University of Singapore Aug 2009 ~ Jul 2013

Bachelor’s Degree in Computer Science

Skills

Programming Languages & Frameworks: JavaScript, TypeScript, нужен доступ к резюме , Express, нужен доступ к резюме , React, MobX, Tailwind, HTML5, CSS3
Frontend Engineering: SPA Development, Component Architecture, React Hooks, Responsive UI, API Integration
Backend / API Development: REST API, OAuth, JWT, Queues, Microservices, API Design, Caching, Asynchronous Processing
DevOps / Infrastructure / CI-CD: GitLab CI/CD, Docker, Nginx, Linux, Bash, Containerization, Deployment Automation
Databases / Data Engineering: MongoDB, MySQL, Redis, Indexing, Query Optimization, Migrations, Aggregations
Testing / QA / Automation: Jest, Mocha, Chai, Supertest, Unit Tests, Integration Tests, Code Review, Documentation
Security / Observability / Compliance: OAuth2, HTTPS, API Security, Access Control, Logging, Monitoring
Collaboration / Agile / Product Tools: Git, Jira, Confluence, Figma, Slack, Agile, Scrum, Pair Programming