Mobile
React Native and Expo applications with native device capabilities, secure authentication, API integration, local persistence, testing, and iOS/Android release work.
Explore this capabilitySenior product engineering
Senior Full-Stack Web & Mobile Engineer
I am based in Nairobi, Kenya and work remotely on East Africa Time (EAT, UTC+3). I build and operate complete software products across the layers that users see and the systems they depend on: mobile apps, web applications, APIs, relational data, payments, AI integrations, testing, and production delivery.
Web
Next.js and React products ranging from public search-oriented websites to authenticated operational systems and workflow-heavy dashboards.
Explore this capabilityBackend & data
Python/FastAPI services, PostgreSQL data models, SQLAlchemy/Alembic migrations, business rules, callbacks, authentication, and transactional workflows.
Explore this capabilityVoice, AI & integrations
Speech-to-text, voice/audio intelligence, LLM reasoning, M-Pesa/Daraja payment flows, AI APIs, image processing, third-party integrations, testing, deployment, and production operations.
Explore this capabilityEnd-to-end evidence
Products that cross multiple engineering layers
The strongest evidence is not a technology list. It is software where one product requirement crosses the interface, backend, data model, integration boundary, and production workflow.
SaaS · Case study
JournPad: Voice Journal
Voice-first journaling app that preserves the original recording, transcribes spoken entries, and uses AI to generate useful titles, summaries, and categories. Entries can be searched and revisited by date, linked to goals, supported by reminders and prompts, and protected with account, deletion, and optional biometric controls.
Read engineering case studyEnterprise · Case study
CliviQue HMIS
Hospital management information system connecting patient registration, OPD, emergency, inpatient care, orders, referrals, theatre, billing, ambulance, mortuary, duty coverage, patient movement, documents, and facility operations. Its latest public draft also adds facility-bound M-Pesa patient invoice collection with encrypted merchant credentials, callback verification, idempotent receipt handling, and invoice reconciliation.
Read engineering case studyEnterprise · Case study
RentPayor
Rent collection and reconciliation software for landlords and property managers. RentPayor creates rent invoices, lets tenants pay KES rent through an invoice-linked M-Pesa flow, automatically reconciles confirmed payments, and keeps partial balances, carried-forward credits, receipts, leases, units, tenants, and manual payment records in one rent ledger.
Read engineering case studyWhat end-to-end ownership changes
Product decisions can account for backend and data constraints before they become UI problems.
Payment and callback workflows can be designed around idempotency, reconciliation, and failure states rather than only the happy path.
Mobile and web interfaces can share coherent business rules because the API contracts and relational model are designed with them.
Testing and release become part of the feature design instead of a separate hand-off after implementation.
Frequently asked questions
Full-stack web and mobile engineering
What does full-stack web and mobile engineering mean in your work?
It means owning the product across the interface and the systems behind it: React Native or Next.js, backend APIs, relational data, authentication, integrations, testing, deployment, and production behavior.
What mobile technologies do you work with?
My primary mobile stack is React Native with Expo and TypeScript, including native device capabilities, secure authentication, API integration, local persistence, analytics, testing, and App Store or Play Store release work.
What web and backend technologies do you use?
My web work centers on Next.js, React, and TypeScript. On the backend I commonly use Python, FastAPI, PostgreSQL, SQLAlchemy, and Alembic for APIs, transactional workflows, and relational business data.
Where are you based and what timezone do you work in?
I am based in Nairobi, Kenya and work on East Africa Time (EAT, UTC+3). I work remotely, prefer contract engagements, receive international contract payments in USD or EUR, and I am also open to strong full-time remote roles.
Which projects best demonstrate end-to-end ownership?
JournPad demonstrates mobile and AI-assisted voice workflows, CliviQue HMIS demonstrates a complex web and backend system, and RentPayor demonstrates mobile, backend, data, M-Pesa collection, reconciliation, and internal operational tooling.