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Full-Stack Web & Mobile App Developer

Oluwaseun Uthman

I design, build, and ship premium digital systems
that scale without compromise.

From strategy to production, I partner with teams to deliver resilient web platforms, mobile experiences, and infrastructure that performs.

FocusScalable web apps & mobile systems
StrengthProduct thinking + engineering rigor
AvailabilitySelective client work

Profile

I solve complex product challenges with calm, focused execution.

I help teams move from ambiguity to momentum. My approach blends product strategy, system design, and precise execution so launches feel inevitable, not risky.

Abstract portrait

28+

Products shipped

5

Teams enabled

6 wks

Avg. launch time

Stack

Full-spectrum delivery across web, backend, and mobile.

I build with production constraints in mind: performance budgets, observability, and maintainable systems.

Frontend

Next.js (App Router)ReactTypeScriptTailwind CSSFramer MotionAccessibility

Backend

Node.jsExpress.jsMongoDBPostgreSQLREST / GraphQLAuth & SecurityQueues & JobsObservability

Mobile

React NativeExpoNative ModulesApp Store Ops

Tools

VercelDockerVPSPostmanCI/CDFigmaStorybookTesting (Playwright/Jest)

Experience

Places I’ve helped teams ship and scale.

A focused timeline of roles and measurable outcomes.

Mindsmaking, U.K.Sep 2023 — Present

Software Engineer

Visit

Promoted from Frontend → Full Stack → Engineering Lead (Jan 2025)

  • Led cross-functional teams shipping web and mobile products with React, Next.js, React Native, Node.js, and Firebase.
  • Architected VPS deployments and security configurations for scalable delivery.
  • Built APIs with Node.js/Express integrated with Firebase Auth and Firestore.
  • Improved performance, accessibility, and testing practices, reducing production bugs by 35%.
Hiisync Software2025

Software Engineer

  • Built a full-stack restaurant management system supporting multi-branch operations.
  • Delivered end-to-end inventory management, reporting, and role-based access.
  • Owned both frontend and backend implementation for reliable, real-time workflows.
LegacyX, U.K.May 2025 — Dec 2025

Mobile App Engineer (Contract)

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  • Engineered an entertainment app with React Native, Firebase, and Node.js.
  • Optimized UI responsiveness and animation performance for smoother navigation.
  • Shipped features for GIF discovery, boosting engagement and retention.
  • Managed App Store and Google Play releases end-to-end.
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Process

A calm, repeatable delivery system.

Clear structure means fewer surprises, faster launches, and confident handoffs.

Step 1

Frame the problem

Clarify the business goal, constraints, and success metrics before touching pixels or code.

Step 2

Design the system

Architect the data flows, APIs, and UI structure so the product can scale without rewrites.

Step 3

Build with intention

Ship a first-class MVP fast, then iterate on performance, polish, and accessibility.

Step 4

Launch and optimize

Measure adoption, refine funnels, and continuously harden reliability in production.

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