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Jason Gundayao

@jasongundayao

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Senior Software Engineer with over 14 years of experience

Philippines

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What I'm looking for

I’m looking to build scalable AI-powered full-stack products, collaborating cross-functionally to ship high-impact features—optimizing performance, automation, and data-driven solutions.

I’m a highly skilled full-stack developer and AI engineer with 14+ years of experience designing, developing, and deploying scalable web applications and intelligent systems. I build responsive, performance-optimized user experiences and integrate AI capabilities into real-world products using modern front-end and back-end technologies.

I architect AI-powered full-stack platforms and lead integrations of LLMs, NLP systems, and automation tools—improving performance by 35% and reducing latency by 40%. I’ve also managed AWS/GCP infrastructure to optimize costs by 25% while supporting 99.9% uptime, and delivered end-to-end AI-driven SaaS solutions that increased user engagement by 20% and retention by 15%. From machine learning to production deployment, I’ve built and deployed models (TensorFlow/PyTorch), reduced preprocessing time by 40%, and cut inference time by 35%.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

Sayeef Digital Agency UK

Aug 2023 - Nov 2025 (2 years 3 months)

• Led architecture & development of high-traffic web apps, boosting performance ~35% via backend optimization & caching.
• Built CI/CD pipelines cutting deployment time 60% for faster, more reliable releases.
• Redesigned APIs with cross-functional teams, reducing latency 25%.
• Mentored juniors and improved team delivery efficiency.

React Python OpenAI API LLM NLP AWS GCP Microservices CI CD Docker

Senior Software Engineer

Science Soft

May 2020 - Jul 2023 (3 years 2 months)

• Developed enterprise software for global clients, boosting throughput ~40% via microservices refactoring & DB optimization.
• Cut system downtime 30% with robust monitoring and automated rollbacks.
• Led monolith-to-cloud migration, reducing ops costs ~20%.
• Enhanced CI/CD with DevOps, improving deployment speed 50%.

Node.Js Development NestJS React AWS MongoDB PostgreSQL Docker Microservices REST APIs Jenkins

Technical Lead

Digital Thing

Jul 2017 - Aug 2020 (3 years 1 month)

• Led engineering team delivering scalable SaaS products, boosting sprint efficiency 45% via agile refinements.
• Architected backends supporting 3x concurrent users with no performance loss.
• Introduced code standards & automated testing, cutting production bugs ~35%.
• Drove system design decisions, ensuring 99.9% uptime.

MERN Stack React Angular CI CD AWS Docker API Integration NodeJS TypeScript Next.js Redis GraphQL CI CD Pipelines

Full Stack Engineer

Thoughtworks

Mar 2013 - Jun 2017 (4 years 3 months)

• Built and maintained full-stack enterprise applications for finance and retail clients, improving page load speeds by 50% through frontend optimization and API redesign.
• Designed RESTful APIs and integrated third-party services, reducing manual work by 40%.
• Collaborated in agile teams and contributed to scalable architectures supporting rapid product growth.

Laravel MySQL Authentication REST APIs JavaScript React NodeJS ExpressJS MongoDB RESTful API Design HTML CSS Bootstrap

Software Engineer Internship

IBM

Jul 2011 - Feb 2013 (1 year 7 months)

• Developed internal tools and enterprise applications, improving workflow automation efficiency by 20%.
• Assisted with debugging and optimizing legacy systems, reducing processing time by 15%.
• Gained experience in distributed systems and enterprise software development while contributing to documentation and testing efforts that enhanced reliability and maintainability.