Open to opportunities

José Luis Valencia

@josluisvalencia

Message

Full-Stack Developer and Technical Lead specializing in web, blockchain, and games.

Peru

Message

What I'm looking for

I seek a role where I can lead technical teams, build scalable web/blockchain/game systems, mentor engineers, and work in a collaborative, fast-paced environment focused on performance and innovation.

I am a Full-Stack Developer and Technical Lead with experience delivering scalable web, blockchain, and multiplayer game applications using Ruby on Rails, ReactJS, Unity3D, PostgreSQL, and AWS. I have led teams, mentored developers, and driven projects from concept to deployment while improving performance through database optimization, event-driven architectures, and real-time systems.

My work includes building NFT and game backends, implementing multi-tenancy and high-concurrency systems, and integrating blockchain smart contracts and Web3 components. I focus on reliable, high-performance solutions, cross-team collaboration, and coaching engineers to raise code quality and deliver business value.

Experience

Work history, roles, and key accomplishments

Full Stack Software Engineer

Aug 2023 - Aug 2025 (2 years)

- Engineered and deployed an optimized access control system, achieving an 8x increase in read/write speeds and enhancing user experience while ensuring full auditability in high-concurrency environments.

- Led migration of order management to an event-driven architecture, boosting platform stability by 35% and enabling seamless delivery of multi-tenant features for scalable growth.

Ruby on Rails ReactJS GraphQL PostgreSQL Redis Sidekiq Kafka Event Driven Architecture Fintech SQL AWS

Lead Software Engineer

Trudan Studios

Jun 2022 - Jun 2023 (1 year)

Engineered a custom Kubernetes-based game server scaling solution, reducing game room creation latency by 40% during peak concurrency and enhancing player experience for over 100k active users.
Designed distributed backend systems and APIs supporting real-time multiplayer sessions and NFT integrations, achieving 99.9% uptime and seamless WebSocket communication for thousands of concurrent players.

NestJS TypeScript Solidity Web3 PostgreSQL Kubernetes WebSockets SQL JavaScript NodeJS NFT Management Smart Contracts Event Driven Programming

Senior Software Engineer

Able.co

Oct 2018 - Jun 2022 (3 years 8 months)

Delivered Rails and React applications for U.S. clients, led technical interviewing and mentoring, and built internal data tools and a data collection app to support product decisions.

Ruby on Rails ReactJS PostgreSQL Redis Sidekiq Mentoring API Development

Backend Developer

Club Internacional de Arequipa

Jun 2015 - Dec 2020 (5 years 6 months)

Implemented member-facing applications and RESTful APIs, integrated payments with ERP, and managed AWS infrastructure to improve bookings, billing, and document workflows.

RESTful APIs PostgreSQL AWS Event Driven Architecture Payment Integration Mobile Integration ERP

Chief Technology Officer

Teczelt

Sep 2015 - Sep 2018 (3 years)

Led development of FazGame platform, enforced engineering best practices, coached developers, and managed Rails backends, Unity3D clients, and AWS infrastructure to scale educational game offerings.