Jason Gundayao

Senior Software Engineer with over 14 years of experience building and operating production systems used by real customers at scale. Experienced in owning technical direction, making architectural decisions, and leading complex initiatives from early design through long-term maintenance. Known for writing clear, reliable code, setting strong engineering standards, and helping teams navigate trade-offs between speed, quality, and business needs.

Comfortable working across product, delivery, and leadership teams to turn ambiguous requirements into practical, well-executed solutions.

Senior Software Engineer at Sayeef Digital Agency UK (2023-08 – 2025-11)

• Led architecture and development of scalable web applications serving high-traffic client platforms, improving system performance by ~35% through backend optimization and caching strategies.
• Introduced CI/CD pipelines that reduced deployment time by 60%, enabling faster release cycles and fewer production issues.
• Worked closely with cross-functional teams to redesign APIs, resulting in a 25% reduction in average response latency.
• Also mentored junior engineers and improved overall team delivery efficiency.

Senior Software Engineer at Science Soft (2020-05 – 2023-07)

• Developed enterprise-grade software solutions for global clients, improving application throughput by approximately 40% through microservices refactoring and database optimization.
• Reduced system downtime by 30% by implementing robust monitoring and automated rollback mechanisms.
• Spearheaded migration from monolithic architecture to cloud-based infrastructure, cutting operational costs by ~20%.
• Collaborated with DevOps teams to enhance CI/CD pipelines, improving deployment speed by 50%.

Technical Lead at Digital Thing (2017-07 – 2020-08)

• Led a team of engineers in delivering scalable SaaS products, improving sprint delivery efficiency by 45% through agile process refinement.
• Architected backend systems that supported a 3x increase in concurrent users without performance degradation.
• Introduced code quality standards and automated testing, reducing production bugs by ~35%.
• Acted as technical decision-maker for system design, ensuring high availability (99.9% uptime).

Full Stack Engineer at Thoughtworks (2013-03 – 2017-06)

• Built and maintained full-stack enterprise applications for clients across finance and retail sectors, improving page load performance by up to 50% through frontend optimization and API restructuring.
• Designed RESTful APIs and integrated third-party services, reducing manual processing time by 40%.
• Participated in agile teams delivering continuous software improvements with high code quality standards.
• Contributed to scalable architecture designs that supported rapid product expansion.

Software Engineer Internship at IBM (2011-07 – 2013-02)

• Assisted in developing internal tools and enterprise applications, improving workflow automation efficiency by approximately 20%.
• Supported senior engineers in debugging and optimizing legacy systems, reducing processing time by 15%.
• Gained hands-on experience with large-scale distributed systems and enterprise software development practices.
• Contributed to documentation and testing efforts that improved system reliability and maintainability.

Bachelor of Computer Science – National University of Singapore (2007-09 – 2011-05)