Rwanda
HEXAD ERP
A comprehensive enterprise resource planning system for operations, inventory and finance across multiple teams.
Full-StackERPWeb App
2024
Freelance Software Engineer
EliezerNsengi
I build scalable applications by leveraging an AI-first workflow to turn complex problems into clean, production-ready solutions.
Visit my studio
Available
Selected Work
Frominitialconcepttofull-scaleproduction.
2021, Present
East Africa
Pamoja Health
2023Healthcare platform enabling safe and private access to sexual and reproductive health services.
HealthcareReactNode.js
Rwanda
Le Phare Library
2023Digital library management system with modern cataloging, lending and community features.
EducationFull-StackWeb App
China
Oucboll Freezer
2024Monitoring and management platform for energy‑efficient industrial freezers.
IoTDashboardReact
Pakistan
Creative Youth For Change
2022Digital platform supporting youth empowerment and community development programs in Pakistan.
Non-ProfitWeb AppCMS
France
Prismo Formations
2025Training and formation platform for detainees in France, with structured learning paths.
TrainingEducationWeb App
Canada
CoRoute
2026Carpooling platform connecting riders and drivers with routes across Canadian cities.
CarpoolingWeb AppMobile App
East Africa
Pamoja Health
2023Healthcare platform enabling safe and private access to sexual and reproductive health services.
HealthcareReactNode.js
Rwanda
Le Phare Library
2023Digital library management system with modern cataloging, lending and community features.
EducationFull-StackWeb App
China
Oucboll Freezer
2024Monitoring and management platform for energy‑efficient industrial freezers.
IoTDashboardReact
Pakistan
Creative Youth For Change
2022Digital platform supporting youth empowerment and community development programs in Pakistan.
Non-ProfitWeb AppCMS
France
Prismo Formations
2025Training and formation platform for detainees in France, with structured learning paths.
TrainingEducationWeb App
Canada
CoRoute
2026Carpooling platform connecting riders and drivers with routes across Canadian cities.
CarpoolingWeb AppMobile App
Identity & Foundation
Academic Roots
Master's in Information Technology
University of Kigali, 2026 - Present
Bachelor's in Computer Science
Kigali Independent University, 2020 - 2023
Off-Code Rhythm
Piano
Drums
Movies
Documentaries
Ibuildsoftwarethatworks.Notjustcodethatcompiles,butproductsthatsolverealproblems.
Asasoftwareengineerandstudiofounder,Iturncomplexbusinessrequirementsintohigh-performancedigitalsolutions.IfoundedKeyypressasaboutiquestudiotoconsolidatemyfreelanceworkandleaddistributedteamstowardbuildingproductsthatmatter.
Withover5yearsofexperienceacrossthefullstack,Ispecializeinarchitectingscalablesystemsfromthegroundup.Fromdatamodelingtodeploymentpipelines,everylayerisbuiltwithadeepcommitmenttocodeintegrity.
IembraceagenticAItoolslikeClaude,Cursor,andAntigravitytoworkatapacethatmatchesmoderndemandwithoutcompromisingonsenior-levelarchitecturaloversight.Whetherit'sdesigningcleanAPIsoroptimizingadatabaseforscale,everydecisionisdrivenbyperformanceandlongevity.
Beyondtheterminal,musicprovidesmycreativeequilibrium.Iplaypianoanddrums,disciplinesthat,muchlikeengineering,requireperfecttiming,asenseofrhythm,andtechnicalmastery.
Open Source Activity
Building in public on GitHub
Specialized Expertise
Leveraging cutting-edge AI and high-speed execution to build robust architectures.
System Architecture
Code Review & Mentorship
Diff Analysis
Technical Strategy
Claude AI
Antigravity
Cursor AI-Native IDE
Windsurf
GitHub Copilot
React / Next.js
React Native
Framer Motion
Tailwind CSS
TypeScript
Node.js / Go
PostgreSQL / MongoDB
Docker / AWS
CI/CD Pipelines
Linux Systems
Jest
Vitest
Playwright
Cypress
React Testing Library
Storybook
Chromatic
E2E Testing
Unit Testing
Integration Testing
TDD
Load Testing
k6
Postman
GitHub Actions
Terraform
Kubernetes
Prometheus
Grafana
Sentry
S3
Lambda
CloudFlare
DigitalOcean
Nginx
PM2
Docker Compose
Microservices
Monorepos
Event-Driven
Domain-Driven Design
CQRS
Clean Architecture
SOLID
Design Patterns
REST APIs
GraphQL
tRPC
gRPC
WebSockets
OAuth 2.0
JWT
OpenAPI/Swagger
Redis
Elasticsearch
RabbitMQ
Kafka
SQLite
DynamoDB
Prisma
Drizzle
Mongoose
Knex
Zustand
React Query
Redux
SWR
Radix UI
Shadcn
Three.js
Sass
CSS Modules
Zod
Firebase
Supabase
Vercel
Git
Figma
Stripe
Socket.io
Turborepo
Webpack
Vite
Express.js
Fastify
NestJS
Hono
Agile
Scrum
Kanban
Code Audits
Technical Documentation
Threat Modeling
Performance Profiling
Accessibility (a11y)
How I Work
A methodical approach to shipping high-quality software.
01
Discovery
I start by understanding the problem space deeply. What are we building? Who is it for? What does success look like?
02
Architecture
I design the system before writing code. Data models, API contracts, infrastructure decisions, all planned upfront.
03
Development
Clean, tested, well-documented code. I ship iteratively, sharing progress and gathering feedback at every step.
04
Delivery
Launch is not the end. I ensure smooth deployment, monitoring, and hand-off so the product lives on without me.
Work
Experience
KB21 Ltd
Software Engineer & Technical Mentor
Oct 2024, Present
Architectingenterprise-gradeapplicationsusingReact,Node.js,TypeScript,andGo.Providingtechnicalmentorshiptodevelopersthroughcodereviewsandworkshops,improvingglobaldeliveryefficiencyby30%.
IMA World Health
Software Engineer
Dec 2022, Feb 2024
PromotedtoSoftwareEngineerforleadinglegacymigrationstomodernstacks.Reducedsystemdowntimeby40%andimproveddataprocessingby60%.EnforcedHIPAAcomplianceandarchitectedautomatedreportingsystemsforinternationalhealthcaremonitoring.
Keyypress
Freelance Software Engineer
May 2020, Present
FreelancingprofessionallyunderKeyypress,asmallstudioIcreatedtobettermanageandbrandmyclientwork.Leadingend-to-enddeliveryforwebandmobileprojects,fromarchitectureandimplementationtodeploymentandlong-termmaintenance.
Moments & Craft
Visualizing the rhythm behind the screens.
Snapshot 1
Atmosphere
Snapshot 2
The Craft
Snapshot 3
Perspective
Snapshot 4
Focus
Snapshot 5