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Leonard Kinyanjui

@leonardkinyanjui

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Senior Front End Software Engineer specializing in React and TypeScript.

Kenya

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What I'm looking for

I seek roles focused on frontend engineering with React/TypeScript, collaborative product teams, opportunities for A/B testing and performance telemetry, and scope to improve user experience and production reliability.

I am a Senior Front End Software Engineer with over 12 years building commercial web applications using React and TypeScript. I focus on delivering intuitive user experiences and measurable improvements in engagement and performance.

At Microsoft Nairobi I led front-end development for the People tab on office.com and sharepoint.com, designed search filtering features, added telemetry tests, and created Grafana dashboards to surface User Perceived Latency metrics. I routinely diagnose and fix production issues to preserve user experience.

Previously I implemented Twilio video into a remote inspection app, designed geolocation features, and led development of a survey application, contributing to both backend and frontend systems. I have experience as a full-stack contractor using Django, AngularJS, and React.

I collaborate closely with PMs and designers, practice A/B testing and sprint retrospectives, and prioritize reliable, testable code that scales in production environments.

Experience

Work history, roles, and key accomplishments

Front End Software Developer

Microsoft

May 2021 - Aug 2025 (4 years 3 months)

Led front-end development for the People tab on sharepoint.com and office.com, improved search filtering and telemetry reliability, and developed Grafana metrics to surface User Perceived Latency; investigated and resolved production issues to improve user engagement.

React TypeScript Telemetry Grafana A B Testing

Software Developer

Silverlogic

Jun 2016 - Apr 2021 (4 years 10 months)

Built remote inspection and survey applications using Django and React, integrated Twilio video, implemented geolocation and asynchronous features, and diagnosed production issues via Sentry to improve reliability.

Django React Twilio Celery Sentry Geolocation API Integration

Freelance Contractor

Upwork

Jan 2013 - Sep 2014 (1 year 8 months)

Delivered full-stack web projects for clients using Django and AngularJS/React, handled project planning, task estimation, and end-to-end implementation.

Django AngularJS React Full Stack Project Planning JavaScript HTML CSS

Software Engineer

Lamu Software

Jan 2013 - Dec 2013 (11 months)

Developed front-end interfaces and Python Django backends for web applications, delivering HTML/CSS/JS implementations and backend services for client projects.