Senior Engineer with 11+ years of experience delivering full‑stack applications across backend, frontend, platform, and QA engineering. Recent hands-on work with Ruby, TypeScript, AWS, and Claude Code, with a strong willingness to adapt to and learn new technologies…

Kaique Kandy Koga

Senior Engineer with 11+ years of experience delivering full‑stack applications across backend, frontend, platform, and QA engineering. Recent hands-on work with Ruby, TypeScript, AWS, and Claude Code, with a strong willingness to adapt to and learn new technologies…

Available to hire

Senior Engineer with 11+ years of experience delivering full‑stack applications across backend, frontend, platform, and QA engineering. Recent hands-on work with Ruby, TypeScript, AWS, and Claude Code, with a strong willingness to adapt to and learn new technologies

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
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Language

English
Fluent
Portuguese
Fluent

Work Experience

Senior Software Engineer (Second contract) at JAVLN / Recruit I.T.
January 1, 2025 - January 1, 2026
Leverage Claude Code to boost engineering productivity while working with end-to-end tests, and enable Playwright for end-to-end testing across the JAVLN platform. Partner closely with the Staff Engineer and Lead QA Engineer to align project scope and expectations, using AI-assisted development and iterative improvements to keep quality high.
Ruby on Rails Developer at JAVL N / Recruit IT
January 1, 2025 - January 1, 2026
Developed Ruby on Rails applications, refined requirements with product stakeholders, and delivered features with a focus on maintainability and performance.
Senior Software Engineer (First contract) at JAVLN / Recruit I.T.
January 1, 2024 - January 1, 2026
Built a general ledger system from scratch for an insurance platform in collaboration with the Head of Product. Owned the full delivery lifecycle from requirement refinement and solution design to implementation and production deployment. Worked with reporting teams to align data models and enable Trial Balance and General Ledger reports using Oracle Ecrion, while actively leveraging AI tools such as Copilot and Gemini to improve coding efficiency.
Senior Software Engineer at Flux Federation
January 1, 2023 - January 1, 2025
Owned the full project lifecycle in the billing domain, solving complex problems using Ruby, React, and AWS—from planning and execution to testing and monitoring to ensure smooth and reliable delivery. Documented both technical and non-technical information in Confluence to support knowledge sharing and team alignment. Used observability tools such as Raygun, Honeycomb, Grafana, AWS CloudWatch, and Prometheus, and supported and mentored junior and intermediate engineers.
Ruby on Rails Developer at Flux Federation
January 1, 2023 - January 1, 2025
Led backend development for Rails-based services, implemented RESTful APIs and data migrations, and collaborated with frontend teams using React/Angular/Vue.js.
Ruby on Rails Developer at James Delivery
January 1, 2019 - January 1, 2022
Built and maintained Rails applications, integrated with microservices and CI/CD pipelines to support scaling to a growing user base.
C# / .NET Developer at CIEE/PRASP.NET
January 1, 2018 - January 1, 2019
Developed features for a student management system using C#, ASP.NET, and SQL Server, and provided technical guidance and mentorship to interns within the development team. Led the migration of legacy web forms applications to modern ASP.NET Core and Angular (TypeScript) solutions, improving performance, maintainability, and user experience.
ASP.NET Developer at CIEE/PRASP.NET
January 1, 2018 - January 1, 2019
Developed ASP.NET Core APIs and front-end components, collaborated with stakeholders to shape feature delivery, and supported migration of legacy systems.
Ruby on Rails Developer at Freelance
January 1, 2016 - January 1, 2018
Delivered Ruby on Rails solutions for multiple clients, including system design, feature implementation, and production deployment in agile environments.

Education

Bachelor of Information Systems at Universidade Positivo
January 1, 2011 - January 1, 2014

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Professional Services, Media & Entertainment, Other, Financial Services, Education, Computers & Electronics