Open to opportunities

Raymond Sigei

@raymondsigei

Message

Senior software engineer and systems architect specializing in scalable distributed systems and cloud-native backends.

Kenya

Message

What I'm looking for

I seek senior engineering roles where I can design scalable backend systems, lead distributed teams, implement cloud-native infrastructure, and drive performance and cost optimizations in a collaborative, growth-focused environment.

I am a Senior Software Engineer and Systems Architect with 9+ years building scalable distributed systems, microservices, and enterprise-grade backend platforms. I have led cross-functional and distributed engineering teams, implemented cloud-native deployments, and driven performance and cost optimizations across multiple products.

My hands-on experience spans Node.js, Python, PHP, AWS, Docker, Kubernetes, and database architectures; notable achievements include designing a national carbon registry backend, reducing deployment time via CI/CD automation, cutting infrastructure costs by 20%, and improving API performance through caching and database optimization.

Experience

Work history, roles, and key accomplishments

Tech Lead & Backend Engineer

Verst Carbon

Jun 2025 - Jan 2026 (7 months)

Architected and delivered scalable backend services for the Kenya National Carbon Registry using microservices and REST APIs, leading a team of 5 to ship the product in 6 months and improving API performance by 35–40%.

TypeScript PostgreSQL Redis OAUTH2 JWT Microservices CI CD AWS

Head of Technology

Adanian Labs

Jan 2022 - May 2024 (2 years 4 months)

Led engineering strategy across a startup portfolio, standardized Docker and Kubernetes workflows, instituted CI/CD and architecture reviews, and reduced infrastructure costs by 20%.

Kubernetes Docker Terraform CI CD AWS Architecture Reviews DevOps Cost Optimization Team Leadership

Senior Systems Architect

Afyarekod Limited

Jan 2020 - Dec 2021 (1 year 11 months)

Designed distributed backend systems supporting USSD, SMS, and REST integrations, implemented caching and secure API authentication, and led architecture and technical workshops for modernization initiatives.

System Architecture Redis OAUTH2 JWT API Design Scalability

Senior Software Developer

Edgetech Consults Limited

Jan 2016 - Dec 2019 (3 years 11 months)

Developed high-traffic REST APIs and telecom-integrated SMS/USSD platforms, improving reliability and performance through structured optimization and error handling.

REST APIs Performance Optimization PHP MySQL Error Handling