Software engineer at Microsoft. Independent maker.

I build interfaces for people and tools for engineers.

My work connects frontend development with developer experience: products that are clear to use, and workflows that are clear to build with.

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Based in Nairobi, Kenya.

Brian Cheruiyot, also known as Bryce Cee — **Bryce Cee**Frontend and developer platformsAbout me

Two kinds of work. One engineering mindset.

Care for the experience, and understand the system behind it.

Developer platforms

At Microsoft, I build developer platforms for a large JavaScript monorepo. My work spans test infrastructure, dependency-aware builds, AI-assisted development, and CI reliability reporting backed by Kusto.

Test infrastructure. I led a 15-package Jest-to-Vitest pilot within a 4,000+ package monorepo, with approximately 4x faster test execution and compatibility checks before wider adoption.
Build feedback. Moving post-build work into a dependency-aware graph reduced average PR build time by approximately 8.3% against a 30-minute reference build.
AI-assisted versioning. I owned the design, implementation, testing, and validation of semver suggestions that delivered feedback in about one minute and reduced P90 PR build time by approximately 6.7% against a 30-minute reference build. My public static-analysis experiment explores a separate approach to the same class of problem.
Focused tools. I reduced a developer MCP server's catalog from 38 tools to 15 and its serialized tool-schema size by 62%, replacing redundant integrations with native CLI workflows.

Frontend products

My frontend work spans shipped client features and independent products. I use React, TypeScript, and state-management tools to turn product requirements into complete user workflows.

Onboarding. I built the new-user onboarding screens for OfColor, a financial wellness platform.
Offline, multi-tenant workflows. For an education PWA, I owned frontend flows for class attendance, planning, and student progress, alongside themed tenant variants. Redux Toolkit managed offline state; a sync control exposed pending uploads, with real-time updates while online.
End-to-end product work. I own and build RareDraw personally. Finexapp, Travel FX, and DevKit explore account tracking, offline currency conversion, and everyday developer tasks.

See the products