Available for Senior Remote Roles & High-Impact Contracts

Senior Product Engineer building mobile, web & fintech products.

A7Studio is Samuel Gichu's engineering lab. I build and improve products with Flutter, React, TypeScript, and financial APIs, with a focus on mobile apps, web products, payments, and money movement.

Flutter & DartReact & TypeScriptPayments & Money MovementAI Assisted EngineeringNairobi, KE ➔ Worldwide Remote
Start a Project / Discuss Role Explore Shipped Work
7+Years in software engineering
MobileFlutter product work
WebReact and TypeScript products
FintechPayments and ledger systems
About Samuel Gichu

Senior Product Engineer.

Mobile, web, and financial products built with a focus on clear user experiences and dependable systems.

Samuel Gichu

Senior Product Engineer · Nairobi, Kenya

I am a senior product engineer with 7+ years of software engineering experience across cross-platform mobile apps, web frontends, and financial systems. I work mainly with Flutter, React, TypeScript, and API driven products.

I also build in the AI lab, using coding agents and Model Context Protocol tools to explore product ideas and improve the engineering workflow.

My product experience includes payments, embedded finance, consumer products, Web3, and commerce.

Nairobi, Kenya · +254 728 370 802 · Open to Global Remote Roles & Contracts

Mobile Engineering

Flutter, Dart, Bloc, Riverpod, custom packages, native iOS & Android bridges, offline-first sync, and 60/120fps fluid interfaces.

FlutterDartiOS / AndroidBloc

Frontend & Web Systems

React, TypeScript, Next.js, Progressive Web Apps, design tokens, and clean architectures.

ReactTypeScriptNext.jsPWA (90+)

Fintech & Payments

Stripe integrations, M-PESA STK Push & USSD, corporate Visa card issuing, Webhooks, KYC/KYB, wallets/ledgers, and idempotent APIs.

M-PESA STKStripeVisa RailsWallets

AI-Native Engineering

Model Context Protocol (MCP), Claude, Cursor, autonomous coding agents, structured workflows, research automation, and 40% faster execution.

MCPClaude / CursorAgentsFast Delivery
Core Competencies

What I Build With.

The tools and product areas I use across mobile, web, payments, and AI assisted engineering.

Mobile Engineering

Production-grade Flutter & Dart applications for iOS and Android. Architecture patterns (Bloc, Riverpod), custom native packages, offline-first sync, and 60/120fps fluid interfaces at enterprise scale.

FlutterDartBloc / RiverpodiOS & AndroidNative PackagesCI/CD

Frontend & Web

React, TypeScript, and Next.js applications. Design systems, Progressive Web Apps, clean component architecture, and responsive interfaces built for real-world performance.

ReactTypeScriptNext.jsVitePWA (90+)Design Systems

Fintech & Payments

Deep expertise in payment rails: M-PESA STK Push & USSD, Stripe integrations, Visa card issuing, corporate ledgers, KYC/KYB digital onboarding, idempotent webhooks, and multi-currency wallet infrastructure.

M-PESA STKStripeVisa RailsKYC/KYBLedgerWebhooks

AI-Native Engineering

Practical AI embedded into the full engineering lifecycle. Model Context Protocol (MCP) servers, autonomous coding agents, structured tool calling, and AI-assisted architecture & debugging workflows.

MCPClaudeCursorAI AgentsGeminiAgentic Workflows
Technology Matrix

Production Tech Stack & Tools

Technologies, frameworks, and developer toolchains battle-tested in high-throughput production environments.

Mobile & Cross-Platform

FlutterDartBloc PatternRiverpodReact NativeiOS (Swift / Obj-C Bridge)Android (Kotlin / Java Bridge)Custom Native Plugins

Frontend & Web Systems

ReactTypeScriptNext.jsJavaScript (ESNext)ViteTanStack Router / QueryTailwind CSSProgressive Web Apps

Fintech & Payments

M-PESA STK PushStripe IntegrationFormanceVisa Rails / Card IssuingUSSD WorkflowsIdempotent WebhooksKYC & KYB VerificationWallets & Ledger Design

AI-Native & Agentic Tools

Model Context Protocol (MCP)Claude & Structured WorkflowsCursor AIAutonomous Coding AgentsGemini Flash / ProStructured Spec Generation

Backend, APIs & Web3

RESTful APIsNode.jsTemporal WorkflowsPostgreSQLSupabase / FirebaseSui Blockchain SDKSmart Contract IntegrationWebSocket Feeds

DevOps, QA & Architecture

Git & GitHub ActionsAutomated CI/CD Pipelines85%+ Test Coverage (TDD)Clean ArchitectureDockerFigma to Code
Proven Track Record

Selected Work.

A concise record of products I have helped build, improve, and ship.

01Shipped for Boya · Fintech · Nairobi, Kenya

Business Payments & Ledger Systems

Fintech Product Engineering

Payments, money movement, ledger integrity, and business investment products.

Worked on Stripe KYC/KYB onboarding and Stripe integration for business financial workflows. Revamped money movement processes by fixing double-entry ledger issues, strengthening ledger integrity, and addressing negative balance scenarios. Also helped revamp a money market fund investment option for businesses.

StripeKYC/KYBMoney MovementDouble-Entry LedgerLedger IntegrityMoney Market Funds
View Project Details
02Shipped for BeatBnk · Mobile Team Lead

Lifestyle & Entertainment Mobile Apps

Mobile Product Engineering

Mobile engineering leadership, Flutter architecture, and AI assisted delivery.

Led mobile development and mentored the team across Flutter architecture, testing, CI/CD, and AI augmented workflows. Used MCP servers and tools including Antigravity, Cursor, and Claude to reduce development time by 40%, improve team velocity by 35%, and reduce production bugs by 60%.

FlutterMobile ArchitectureAI Assisted DevelopmentMCPTestingCI/CD
View Project Details
03Shipped for Alvin Technologies (alvin.finance) · Remote

Embedded Finance Applications

Embedded Finance Engineering

React widgets, Flutter packages, and cross platform finance infrastructure.

Built embeddable React finance widgets for enterprise clients, custom Flutter packages with native iOS and Android APIs, and backend services for financial transactions. Added mini program deployment, reached 85% code coverage, cut deployment time by 50%, increased client adoption by 40%, and reduced feature development time by 30%.

FlutterReactNext.jsTanStack QueryFirebaseNative APIsCI/CDFlask
View Project Details
04Shipped for Valuencer · Denmark

Web3 Investment Platform

Frontend Product Engineering

A creator investment platform connecting creators with fans.

Built the React and TypeScript frontend, integrated the Sui Blockchain SDK, and collaborated with blockchain engineers on smart contract flows. Focused on making Web3 investment experiences understandable to non technical users.

ReactTypeScriptPWASui SDKWeb3Smart ContractsREST APIs
View Project Details
05Shipped for Kakitoo · Lead Mobile Engineer

Privacy Focused Tipping Platform

Mobile & Payments Engineering

We're here for the kiDOGO.

A hassle free tipping platform for blue collar workers in East Africa, helping people boost their income securely and anonymously. Built the Flutter mobile app and React web frontend with M-Pesa STK Push, anonymous USSD tipping through *835*77#, and the custom KAKITOO ID privacy system.

FlutterReactNext.jsM-Pesa STK PushUSSDKAKITOO ID
View Project Details
06Shipped for Chupachap · Nairobi, Kenya

Liquor Delivery E-commerce Platform

Mobile Product Engineering

A WooCommerce commerce platform for fast liquor delivery in Nairobi.

Built the complete e-commerce solution with WooCommerce integration, a 500+ item product catalog, responsive mobile shopping experience, and payment gateway checkout. The platform is live and serving Nairobi customers through Chupa Chap’s fast delivery service.

FlutterReactReact NativeWordPressWooCommerceNode.jsREST APIsMongoDB
View Project Details
07Built with mb96 for Telkom Kenya

T-Kash Mobile Payments App

Mobile Product Engineering

A mobile payments app for Telkom Kenya customers.

Part of the team at mb96 that built T-Kash, with mobile flows for payments, account balances, and telecom services through Telkom APIs.

FlutterMobile PaymentsTelecom APIsSelf Service
View Project Details
08Shipped for SYNTAX Ltd · US & UK Clients

Giraffe Spotter & Client Applications

Product Engineering

An AI assisted citizen science app for giraffe research and conservation.

Built Flutter applications from design, reusable component libraries, backend integrations, and production fixes for international clients. For Giraffe Spotter, built the mobile experience for uploading giraffe photos, fur pattern matching, location and date capture, directory browsing, and donations, helping GCF turn safari sightings into research data.

FlutterAI Image MatchingCitizen ScienceFirebaseREST APIsCloud Functions
View Project Details
09Shipped for mb96 Ltd · Kenya, Canada & US Clients

Commerce Products & UI Systems

Mobile & Web Product Engineering

Cross platform applications and reusable UI systems for international clients.

Built mobile and web applications for clients in Kenya, Canada, and the US, with reusable UI components, design systems, microservice integrations, and REST APIs. Worked across Agile delivery cycles to turn product requirements into reliable client applications.

FlutterReactReact NativeWordPressWooCommerceREST APIsNode.js
View Project Details

Have a similar product or mobile project in mind?

Whether you need a senior mobile engineer to take your Flutter app from 0 to 1, integrate complex payment rails, or boost engineering velocity, let’s talk about your requirements.

Let’s Discuss Your Project
A7Studio Research & Builds

In The Lab.

Upcoming products and engineering experiments outside client work.

Live Product · Active Development

Kakitoo

A privacy-first tipping platform for creators. Send micro-support without invasive tracking, ad trackers, or data brokers. Built with Flutter mobile and React web, with native M-Pesa STK push and USSD flows.

Visit kakitoo.com
Upcoming Project

Good Call

A personal finance app designed to help people pause, understand trade offs, and improve how they make spending decisions.

Coming Up
AI Assisted Engineering

AI assisted workflows

Exploring coding agents, MCP tooling, and structured workflows for product development.

Active Lab Experiment
Engagement & Roles

Work With Me.

How we can collaborate — tailored for engineering leaders hiring senior remote talent, founders building 0-to-1 products, and fintechs scaling transaction rails.

01

Senior Full-Time Remote Roles

High-output Senior Product Engineer (Flutter, React, TypeScript) joining your distributed engineering team. Proven experience managing teams, cutting bugs by 60%, and lifting sprint velocity by 35%.

  • Full ownership of mobile architecture (Flutter) & web frontends
  • Automated testing (85%+ coverage), CI/CD pipelines, and code mentorship
  • Seamless alignment across global timezones (US, Europe, Africa)
Best for: Series A-C startups, remote-first companies, product scaleups
Discuss Full-Time Role →
02

Contract & 0-to-1 Product Sprints

End-to-end mobile app or web platform delivery on milestone-based sprints. Turning Figma designs and product specs into shippable, App Store & Google Play approved applications.

  • Rapid MVP development for iOS, Android, and web browsers
  • App Store & Google Play Store submission and release management
  • 40% faster turnaround using modern AI-assisted engineering tools
Best for: Early-stage founders, launch deadlines, new product exploration
Request a Sprint Quote →
03

Fintech & Payments Implementation

Architecting secure, compliant financial interfaces and transactional rails: mobile wallets, corporate card issuance, mobile money (M-Pesa), Stripe integrations, and multi-currency checkouts.

  • M-PESA STK Push, USSD, Stripe, and Visa rails integration
  • Ledger integrity, double-entry money movement, digital KYC/KYB, and idempotent webhooks
  • Financial data security and biometric auth implementations
Best for: Fintech startups, e-commerce platforms, payment processors
Consult on Payments →
04

AI-Native Product Tooling & Agents

Embedding practical AI into modern applications. Moving beyond simple wrappers into structured tool calling, autonomous agent loops, and Model Context Protocol (MCP) integrations.

  • Real-time LLM tool execution, structured JSON outputs, and research agents
  • AI-assisted engineering workflows for codebase exploration and debugging
  • High-efficiency agentic workflows for operational workflows
Best for: AI startups, productivity apps, predictive intelligence systems
Explore AI Solutions →
Direct Inbound Line

Let’s build something remarkable.

Whether you’re hiring for a senior engineering role, planning a contract sprint, or integrating fintech/AI features, I’m ready to help you ship. Choose a topic below to kick off the conversation directly.

Open for Senior Remote Roles & High-Impact Sprints
What are you looking to build or hire for?
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