Simon Okello

About Me

I enjoy problem-solving and coding. Always strive to bring 100% to the work I do. I have professional experience in technologies such as Python, Django, FastAPI, Flask, MySQL, PostgreSQL, MongoDB, ReactJS and NodeJS.

I am passionate about developing complex applications that solve real-world problems impacting millions of users. Currently serving as CTO at Viewtech Limited (SasaPay), leading the technology vision for a growing fintech platform in East Africa.

Languages Python, JavaScript

Databases MySQL, PostgreSQL, MongoDB, SQLite

Frameworks Django, FastAPI, Flask, Node.js

Tools & Cloud Git, Docker, AWS, GCP, Nginx

6+ Years of Dev

CTO Current Role

10+ Technologies

4 Live Projects

Experience

Chief Technology Officer (CTO)

Viewtech Limited — SasaPay

May 2025 – Present

Nairobi, Kenya

Leading the overall technology vision and strategy for SasaPay, aligning the engineering roadmap with business objectives.
Overseeing architecture decisions across Fintech products including WAAS, payment APIs, and developer platforms.
Managing and mentoring cross-functional engineering teams across software development and DevOps.
Driving adoption of scalable cloud infrastructure and CI/CD practices across all product lines.

Sr. Software & DevOps Engineer

Viewtech Limited — SasaPay

Dec 2021 – May 2025

Nairobi, Kenya

Created and maintained the Wallet as a Service (WAAS) API, enhancing service adoption by 60%.
Implemented C2B, B2C, and B2B payment and collection APIs, boosting transaction volume by 30% and user satisfaction by 25%.
Updated the SasaPay Developer portal and API docs, enhancing developer engagement by 40% and reducing integration issues by 30%.
Led API integrations with partner systems, expanding the partner ecosystem by 25% and increasing API usage by 30%.
Supported client onboarding, improving retention by 15% and reducing onboarding time by 20%.

Quality Analyst

Sama

May 2021 – Oct 2021

Nairobi, Kenya

Reviewed and assessed annotated data for AI algorithms to ensure accuracy and quality.
Oversaw agent work to ensure compliance with client requirements and internal standards.
Monitored KPIs such as Total Process Time (TPT) and throughput to gauge agent efficiency.

Data Entry Specialist

Cloud Factory

Jun 2018 – Mar 2021

Nairobi, Kenya

Entered and verified data from various sources, ensuring accuracy and completeness.
Conducted quality checks and resolved discrepancies, enhancing overall data quality.
Generated detailed reports for strategic planning and performance monitoring.