GSJUK ELJYINYT
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Product engineer and technical generalist from the UK with 8 years of experience. I don't just write code—I architect solutions, manage AI agents, review their output, and ship complete products. Currently digital nomading through Central America, building side projects like Trek Together to solve real problems I find while travelling.
8 years across startups and enterprises—click to expand
Creating travel experiences through innovative digital products.
London-based healthtech startup using genetic data to predict and prevent health conditions, primarily focused on women’s health in the US market.
- •Took over full technical ownership as the outgoing CTO transitioned out
- •Maintained and improved the existing platform across both the research and commercial arms
- •Optimised AWS infrastructure, delivering significant cost savings
- •Built new revenue-generating products including an embeddable sales funnel for client websites
Led engineering for a nightlife safety startup using indoor positioning with Bluetooth beacons.
- •Scaled team from 2 to 8 members (iOS, Android, Web), acting as Scrum Master and Product Owner
- •Architected core NestJS API, grew user base to 65,000 with 3,000 MAU across 17 UK venues
- •Built GCP infrastructure with Docker, Cloud Build CI/CD, PostgreSQL with PostGIS
- •Migrated Next.js 12 to 14 with App Router, significantly improving performance
- •Won Geospatial Innovation Award from Ordnance Survey
Part of the technical team for the global sailing championship, preparing infrastructure for each event.
- •Mastered Docker containerisation, improving deployment efficiency by 40%
- •Created hybrid AWS/Oracle Cloud solution with 30% cost reduction and 99.99% uptime
- •Led and technically managed external teams on specific projects
- •Improved sprint management, increasing productivity by 15% and reducing overruns by 50%
COVID-19 testing provider building mobile apps and web consoles for PCR test management.
- •Created online webstore in one week, featured on government website, 1,000+ kits sold in 24 hours
- •Contributed to £250,000+ in test kit sales through the platform
- •Increased API response speed by 45% through Django backend optimisation
- •Maintained 99.9% uptime on AWS infrastructure (EC2, S3)
AI chatbot startup serving businesses on Messenger to engage new markets.
- •Built Express.js API, upgraded from ES6 to TypeScript for scalability
- •Created native mobile app for conversation monitoring (Angular 5, TypeScript)
- •Built internal dashboard for API usage and error monitoring (React, Redux, Firebase)
What People Say
From people I've worked with
“I've had the pleasure of working with James on two projects, Pin Traveler and WYA, and he's the person you want on your team. He's your go-to for anything in software, especially full-stack development. He combines his technical expertise with calm, professional leadership, takes on complex challenges without hesitation, and consistently delivers high quality products with passion.”
Let's Work Together
Open to side projects, contract roles, and everything in between
Location
Central America
Experience
8 years
Team Lead
Up to 8 people
I started coding young and never stopped. With 8 years of hands-on experience, I've led teams of up to 8 people (6 devs, QA, and designer) and shipped products from zero to production. Communicating with stakeholders and non-technical partners has been a regular part of my experience.
I work as a product engineer, not just a developer. My role is to architect, review, and ship—using AI agents as my engineering team. I manage workflows with Claude Code and Cursor, review code with CodeRabbit, track analytics with PostHog, and manage delivery with Linear. This makes me a force multiplier—one person delivering what traditionally takes a team.
I'm tech-agnostic and adapt to whatever your stack needs. I also have strong SEO experience with Google Search Console across multiple live apps. Currently travelling through Central America as a digital nomad, which means I'm available at a reduced rate.
What I Can Help With
Idea to Shipped Product
Take your concept from zero to production — web, mobile, or both
AI-Augmented Development
Ship faster with AI agent workflows — one person, team-level output
Infrastructure & DevOps
Cloud architecture, Kubernetes, CI/CD pipelines, and cost optimisation
SEO & Growth
Technical SEO, Google Search Console, Core Web Vitals, and performance
Technical Leadership
Code review, architecture decisions, team setup, and mentoring
Rescue & Takeover
Inherit existing codebases, stabilise, and improve — I’ve done it before
I'm open to a variety of opportunities—from simple websites to complex SaaS platforms, including side projects, contract roles, and long-term partnerships.
Availability