Looking for a job

James Asuelimen

@jamesasuelimen

Message

I build high-performance fintech interfaces and full-stack trading platforms for financial institutions.

Nigeria

Message

What I'm looking for

I'm available immediately for remote roles where I can build production React, TypeScript, and Next.js products, own features end to end, and overlap with EU or US-East teams.

At Aristack Technology Solutions, I lead frontend and full-stack delivery for Falcon treasury, FX trading, and investor products used by financial institutions across Nigeria, Ghana, and Botswana. I build data-dense React, TypeScript, and Next.js workflows for real-time market data, trading, portfolios, and investment performance.

I've improved trader productivity by 30%, supported 99.8% uptime across FX platforms for 5+ institutions, and reduced API latency by 45% through database optimisation and connection pooling. I also lead releases across UAT, SAT, and production and resolved 95% of P1/P2 incidents within a two-hour SLA.

Beyond fintech, I've built high-concurrency streaming, e-commerce, booking, mobile, and AI-powered proctoring products. I bring React, Spring Boot, Node.js, cloud infrastructure, testing, and security work together to own features end to end.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Aristack Technology Solutions

Sep 2024 - Present (2 years)

Lead frontend engineer for enterprise fintech products, including a treasury suite and FX trading platforms, serving banks across West and Southern Africa. Improved trader productivity by 30% and reduced API latency by 45%.

React TypeScript Next.js MUI Tailwind Redux Spring Boot NodeJS PostgreSQL AWS Docker Jenkins CI CD JMeter Performance Testing Security Testing

Full-Stack Developer (Freelance)

iBloom Decor Rentals

Jan 2024 - Jan 2025 (1 year)

Shipped a Next.js/React e-commerce and booking site with 90+ Lighthouse scores and 40% faster page loads. Cut cart abandonment by 35% and raised engagement by 40% with UX improvements.

Next.js React Stripe Ecommerce Booking UX Lighthouse Performance Optimization

Senior Software Engineer (Contract)

Monarch Group

Jan 2024 - Aug 2024 (7 months)

Built a sports streaming platform from scratch with real-time video and high concurrency support. Led maintenance and feature upgrades on a hospitality platform with zero-downtime releases.

React TypeScript Next.js NodeJS Live Video High Concurrency Systems Performance Optimization UAT SATs Production

Software Engineer Intern (part-time)

Semicolon Labs

Sep 2023 - Dec 2023 (3 months)

Built an AI-powered proctoring system serving 1,200+ concurrent students across 15+ institutions. Its real-time monitoring dashboard cut fraud-detection time by 65%.

React NodeJS TensorFlow JS AI Real time Monitoring Fraud Detection

Mobile Developer (Contract)

Revo Energies

Aug 2023 - Dec 2023 (4 months)

Developed a React Native app that cut onboarding time by 50% and raised retention by 35%, backed by Spring Boot APIs serving 10,000+ daily requests. Led the Figma UI/UX work.

React Native Spring Boot Figma UI UX Mobile Development

Software Engineering Trainee

Semicolon Africa

Sep 2022 - Sep 2023 (1 year)

Completed a 12-month intensive programme in full-stack development, system design, algorithms and Agile. Built the BIME Chrome extension with 1,000+ active users.

React Spring Boot Chrome Extension APIs Fullstack Development System Design Algorithms Agile