System DesignReliability•15 Sept 2026
Why disabling the button did not stop the duplicate request
Reliability•15 Sept 2026
Retries, duplicate delivery and durable business invariants
Ronnie Kiyegga
Software Engineer Product & Design
Engineering
Thinking past the first fix
Notes on performance, reliability and the engineering decisions behind software that holds up in practice.
Explore the notesHow would you keep a React interface responsive while processing 10,000 records?
• Read investigation →ProductProduct judgement•14 Aug 2026
Why the empty state should come before the happy path
Product judgement•14 Aug 2026
Designing the first useful action before the populated dashboard
DesignDesign systems•9 Jun 2026
Why a component library can make product delivery slower
Design systems•9 Jun 2026
Reuse only helps when the underlying decision is stable
/ About
About
I’m Ronnie, a product-minded software engineer who works across frontend, design and backend systems. I care about making interfaces clear and useful, then making sure the workflows behind them remain reliable when data is incomplete, requests fail or users take an unexpected path.
My work has involved taking products end to end: translating ideas into Figma workflows, building responsive TypeScript and React interfaces, and working across APIs, databases and operational concerns. I am especially interested in design systems, data-heavy interfaces and the trade-offs behind software that needs to work beyond the happy path.
Outside of delivery work, I learn by building and writing about engineering problems, product decisions and interface design.
/ Stack & Tools
Stack and tools
/ Experience
Experience
- 2026
Software Engineer · Selected Client Work
Building product and analytics software across education and operations, from early requirements through to production.
- 2023 - 2026
Software Engineer at School of Research Science
Built internal assessment, booking and reporting products used across a 1,000+ student organisation.
- 2020 - 2023
Software Engineer · Client Projects
Delivered customer-facing ecommerce, media and operational products across long-term client engagements.
- 2019 - 2019
Software Engineer Intern at Adaptive
Built data visualisation and ingestion tooling for financial-data workflows.
School of Research Science/ Selected Work
From product problem to working software
A selection of products I’ve designed and built, connecting user needs, interface design and the engineering behind them.
Drag, scroll, or use the left and right arrow keys to explore the work.
/ Education
Education
King's College London
BSc in Computer Science
/ Design
Interfaces & Components
A selection of dashboards, search tools and interface details I've designed.
Product work alongside independent studies
