Ruby on Rails 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

Experienced Senior Software Engineer with over 8 years of expertise in developing high-quality, scalable web applications using Ruby on Rails and React. Skilled in cloud platforms like AWS, Docker, and Kubernetes, with a strong focus on building real-time features and optimizing backend systems. Proven track record of collaborating with cross-functional teams to drive product growth and enhance user experiences, particularly in educational and enterprise solutions. Ready to leverage deep technical expertise to contribute to the continued success of Happy Numbers.

Experience

Rescode | Senior Software Engineer May 2022 ~ Present

• Led the development of core features for an educational platform, improving user engagement by 40%.
• Integrated real-time notifications using WebSockets and Redis, enhancing interaction and reducing latency.
• Optimized database queries for PostgreSQL, cutting response times by 30% while scaling user capacity.
• Built new API endpoints in Ruby on Rails to extend platform functionality and integrate with third-party services.
• Introduced automated testing practices with RSpec and Capybara, increasing code coverage by 35%.
• Deployed applications to AWS, utilizing Docker and Kubernetes for scalable and fault-tolerant systems.
• Led sprint planning and collaboration efforts, working closely with product managers and designers to define feature requirements.
• Mentored junior engineers, fostering skill development through code reviews and one-on-one guidance.
• Designed and maintained microservices for data processing, ensuring high availability and low latency.
• Coordinated continuous integration and deployment processes with GitHub Actions, streamlining releases and reducing deployment errors by 20%.
• Contributed to cross-functional team discussions, ensuring features aligned with business goals and user needs.
• Analyzed and optimized system performance using profiling tools, achieving a 25% improvement in speed.
• Supported ongoing system maintenance and troubleshooting, minimizing downtime and improving reliability.
• Enhanced security features by integrating best practices for data protection and authentication.
• Improved customer satisfaction by resolving issues within SLA targets, ensuring quick turnaround times.
• Actively participated in post-release monitoring, responding to user feedback and addressing critical issues.

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

• Developed and deployed high-impact Ruby on Rails features for an e-learning platform, increasing daily active users by 20%.
• Led the migration of legacy systems to a Ruby on Rails-based architecture, improving maintainability and scalability.
• Integrated various third-party APIs for payment processing and real-time notifications, enhancing platform functionality.
• Optimized backend performance with PostgreSQL, reducing query times and improving load times by 15%.
• Collaborated with front-end teams to integrate React components for an improved user experience.
• Designed REST APIs for internal use and third-party integrations, enabling faster data exchange.
• Created and maintained CI/CD pipelines using GitHub Actions, speeding up deployment cycles and improving code quality.
• Implemented security protocols, ensuring data privacy compliance for users and partners.
• Introduced automated unit tests, improving code reliability and coverage by 25%.
• Supported server infrastructure management with AWS, ensuring high availability and fault tolerance.
• Worked closely with product and business teams to develop new features based on customer feedback.
• Conducted performance reviews and optimizations, resulting in a 20% increase in system responsiveness.
• Participated in knowledge-sharing sessions and code reviews, contributing to team-wide technical improvements.

Wise | Full Stack Engineer May 2015 ~ Feb 2019

• Designed and developed new features for a financial platform using Ruby on Rails, boosting user retention by 15%.
• Integrated PostgreSQL and Redis into the backend to optimize data storage and retrieval processes.
• Built scalable REST APIs for internal use and external integrations, supporting a growing user base.
• Implemented unit tests and CI/CD practices, reducing system bugs by 18%.
• Supported cloud deployments using AWS and Docker, ensuring a cost-effective infrastructure.
• Collaborated with design and front-end teams to deliver seamless user interfaces and functionality.
• Enhanced security features by integrating two-factor authentication and encryption for sensitive data.
• Coordinated release management, ensuring smooth deployment of new features with minimal disruptions.
• Led database optimization projects, resulting in a 25% improvement in query performance.
• Participated in sprint planning and agile ceremonies, ensuring timely delivery of features.
• Provided mentorship to junior engineers, assisting with code reviews and troubleshooting complex issues.

Education

National University of Singapore Aug 2009 ~ Jul 2013

Bachelor’s Degree in Computer Science

Skills

Programming Languages & Frameworks: Ruby, Ruby on Rails, React, JavaScript, HTML, CSS
Backend Development: REST APIs, Microservices, Event-Driven Architecture, WebSockets
Databases & Data Engineering: PostgreSQL, Redis, ORM, Database Migrations
Cloud Platforms & Infrastructure: AWS, GCE, Docker, Kubernetes, GitHub Actions, CI/CD
Testing / QA / Automation: RSpec, Capybara, FactoryBot, Test-Driven Development (TDD)
Collaboration / Agile / Product Tools: Agile, Scrum, Jira, GitFlow, Slack, Confluence