Denis Njau
NAIROBI,NAIROBI
Summary
Accomplished professional with extensive expertise in system architecture and distributed systems, demonstrating a strong command of the .NET framework and C#. Proficient in API integration and REST API development, with a proven track record in cloud computing and systems analysis. Adept at technical leadership, code reviewing, and fostering an innovative mindset to solve complex problems. Committed to leveraging skills in system design to drive technological advancements and enhance organisational efficiency.
Overview
17
17
years of professional experience
7
7
years of post-secondary education
Work history
Senior Software Engineer
Microsoft
Nairobi, Kenya
05.2021 - 08.2025
- A member of the Identity Governance team that achieved 10x increase in notification delivery, within four years.
- Led monitoring improvements for core services, enhancing issue detection speed and reducing customer escalations.
- Migrated to service bus for queue management, resulting in 99.9% of emails delivered in under two minutes while optimizing cost efficiency.
- Acted as engineering lead, ensuring smooth onboarding for new leadership and mentoring team members through pull request reviews, deep dives, and knowledge-sharing sessions.
Full Stack Developer
Co-operative Bank of Kenya
Nairobi, Kenya
09.2018 - 04.2021
- Provided technical guidance and support to help merchants successfully integrate with Visa payment gateway, unlocking a new stream of non-funded revenue.
- Built a digitized process workflow, transforming the end-to-end account opening journey.
- Revamped loan origination portal, reducing the loan disbursement period from 10 days to 2 days.
- Engineered a self-service tool allowing customers to link phone numbers via ATM points, eliminating the need to visit a branch for this.
Platform Engineer
Ajua Ltd
Nairobi, Kenya
08.2017 - 09.2018
- Designed a question/answer graph engine, optimizing survey execution through reduced database lookups.
- Managed core messaging infrastructure, including connections to SMS gateways for survey delivery.
- Developed a Google RCS prototype, enhancing user experience in survey participation.
- Enhanced system health monitoring, significantly reducing false alarms and improving on-call experience by minimizing unnecessary escalations.
Freelance Software Developer
Independent
Nairobi, Kenya
08.2016 - 07.2017
- Built a real estate price prediction tool using regression modeling.
Solutions Developer Consultant
Clinton Climate Initiative
04.2015 - 07.2016
- Developed a reporting portal for Kenya’s SLEEK program, enabling compliance with carbon emissions tracking.
Co-Founder & Tech Lead
Partechs Solutions Ltd
07.2010 - 01.2015
- Created a transaction processing gateway, expanding integration channels for loyalty software.
- Designed a retail incentive platform, rewarding airtime sales with redeemable points.
- Led development of web-based billing, leave management, and parcel tracking solutions.
Junior Software Developer
Bytronics Computers Ltd
01.2009 - 07.2010
- Contributed to weighing software solutions and enhanced weighbridge transaction validation by integrating IP camera-captured vehicle images.
- Developed an order processing system for a dairy cooperative, integrating it into their Enterprise Resource Planning workflow.
Education
Bachelor of Science - Computer Science
Africa Nazarene University
Kenya 01.2006 - 06.2009
MIT/Nokia Joint Entrepreneurship Program - Mobile programming
E-Mobilis Mobile Training Academy
Kenya 07.2009 - 12.2009
Certified Investment and Financial Analyst - Investement and Financial Analysis
Star College of Management Studies
Kenya 01.2016 - 06.2019
Skills
- NET framework
- System architecture and design
- API integration competency
- Code reviewing
- Distributed Systems
- Cloud computing
- Technical leadership
- Innovative mindset
- Complex problem-solving expertise
Languages
English
Fluent
References
- Calestor Magero, Principal Software Engineering Manager, Microsoft
- Frank Molla, Managing Director - Africa, MDP
- Mburu M. Njonjo, Senior ICT Specialist, Bytronics Computers Limited
- Moses, Kihumba, CEO & Founder, Carhoot
Timeline
Senior Software Engineer
Microsoft
05.2021 - 08.2025
Full Stack Developer
Co-operative Bank of Kenya
09.2018 - 04.2021
Platform Engineer
Ajua Ltd
08.2017 - 09.2018
Freelance Software Developer
Independent
08.2016 - 07.2017
Certified Investment and Financial Analyst - Investement and Financial Analysis
Star College of Management Studies
01.2016 - 06.2019
Solutions Developer Consultant
Clinton Climate Initiative
04.2015 - 07.2016
Co-Founder & Tech Lead
Partechs Solutions Ltd
07.2010 - 01.2015
MIT/Nokia Joint Entrepreneurship Program - Mobile programming
E-Mobilis Mobile Training Academy
07.2009 - 12.2009
Junior Software Developer
Bytronics Computers Ltd
01.2009 - 07.2010
Bachelor of Science - Computer Science
Africa Nazarene University
01.2006 - 06.2009
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