Full Stack Engineer London, UK Right to work in the UK

I build the systems behind real bookings.

Backend-leaning full stack engineer: Node.js REST APIs, Redis caching, OAuth 2.0 / JWT / RBAC, Docker and GitHub Actions CI. Two platforms in production for UK businesses. Looking for a backend or full-stack role in SaaS, fintech or AI products.

Visnu Singh
Graduation · Northampton, 2025

About

I like the unglamorous parts.

Backend first

I'm Visnu, a full stack engineer in London. I finished my Computer Science degree at the University of Northampton in 2025, after starting it at Assumption University in Thailand, and went straight into production work for UK businesses: first a store-discovery and booking platform for TEKNIFY, then the airport-parking platform I'm building now at Gregg Maurice.

Most of my time goes into the backend: REST API design, caching strategy, auth boundaries (OAuth 2.0, JWT, RBAC), retry-safe email pipelines, and CI that catches regressions before customers do. When the admin panel needs building too, I'm comfortable in React and Tailwind.

I work in English, Hindi and Thai, have the right to work in the UK, and am open to relocation.

Based in
London, United Kingdom
Currently
Full Stack Engineer at Gregg Maurice
Open to
Backend or full-stack roles in SaaS, fintech or AI products. Right to work in the UK, open to relocation.
Languages
English, Hindi, Thai
Degree
BSc Computer Science, University of Northampton, 2025

Work

What I've shipped.

2024 – present

Nov 2025 – Present

Gregg MauriceAirport parking, Heathrow & Gatwick

Live · greggmaurice.co.uk

Full Stack Engineer

Airport parking booking platform processing real customer transactions for Heathrow and Gatwick, with the admin tooling and supplier automation behind it.

  • Shipped the live platform, including SEO-optimised landing pages, and kept it running with real bookings coming through.
  • Accelerated repeated supplier and booking lookups by ~50% with Redis caching, cutting database load and speeding up daily admin workflows.
  • Architected a secure admin panel with RBAC, protected routes and inactivity auto-logout, covering booking management, promo controls and operational settings.
  • Automated backend pipelines for IMAP supplier-email parsing, booking import queues and Nodemailer notifications, eliminating manual data entry.
  • Engineered end-to-end booking workflows (search, filtering, reports, CSV export, amend and extend flows) and supplier commission reporting with per-supplier email dispatch.
  • Reduced production regressions with GitHub Actions CI: automated linting, build validation and deployment checks on every push.

React · Tailwind CSS · Node.js · Express.js · Redis · REST APIs · IMAP · Nodemailer · GitHub Actions

Aug 2025 – Oct 2025

TEKNIFY LTDStore discovery & booking, retail

Live · teknifyltd.com

Freelance Full Stack Engineer

Store discovery and booking platform for a retail business, delivered as a freelance engagement from backend to deployment.

  • Designed and launched production REST APIs for store discovery, booking workflows, secure admin operations and dynamic site configuration.
  • Improved API response times by ~50% with Redis caching of repeated requests, and secured admin operations with Google OAuth and protected routes.
  • Automated booking confirmations with branded SMTP email templates, retry-safe states and delivery observability, so customers reliably get their confirmation.
  • Built nearest-store search with geolocation, Haversine distance, ETA logic and the Google Maps API.

Node.js · Express.js · Firebase · SQLite · Redis · Google OAuth · Docker · Google Maps API · SMTP

Dec 2024 – May 2025

Online Learning PlatformAcademic project · University of Northampton

Source on GitHub

Backend Developer

Platform for professors to upload and manage lectures while students browse and search courses, with the backend and data model as my responsibility.

  • Improved dashboard and lecture retrieval performance by 25% by designing normalised MySQL schemas and optimising backend queries.
  • Built secure REST APIs for lecture uploads, course management and role-based access for professors and students.
  • Implemented JWT authentication and role-based middleware to secure access across lecture and course workflows.

Node.js · Express.js · MySQL · JWT · RBAC

Sep 2024 – Dec 2024

Smart Camera Monitoring SystemAcademic project · University of Northampton

Source on GitHub

Backend Developer

Real-time motion detection, live streaming and incident logging, deployed on AWS EC2.

  • Achieved 92% motion-detection accuracy with a real-time OpenCV backend and optimised frame differencing.
  • Delivered 30 FPS streaming at under 200 ms latency through low-latency Flask APIs, deployed and tuned on AWS EC2 (Linux).
  • Improved incident response efficiency by 40% with SQLite incident logging and a Flask dashboard for live feeds and event history.

Python · Flask · OpenCV · AWS EC2 · SQLite · Linux

Skills

The stack I work in.

Same list as my CV

Languages
JavaScriptTypeScriptPythonSQL
Backend & APIs
Node.jsExpress.jsFlaskREST API designRBACOAuth 2.0JWT
Databases & caching
PostgreSQLMySQLSQLiteFirestoreRedis
Cloud & DevOps
AWS EC2DockerLinuxCI/CDGitHub Actions
Frontend
ReactNext.jsTailwind CSSVite
Testing & practices
JestPytestSwagger / OpenAPIAgile / ScrumCode review
Architecture
System designAPI integrationsQuery optimisationLoggingMonitoringPerformance optimisationGit

Education & certifications

Degree and credentials.

2021 – 2026

Education

Sep 2024 – Jul 2025

BSc Computer Science

University of Northampton, UK · Final-year top-up as a transfer student

May 2021 – Mar 2024

BSc Computer Science

Assumption University, Thailand

Certifications

Jun 2026

Microsoft Certified: Azure Fundamentals

Microsoft

Verify on Credly

Feb 2024

AWS Academy Cloud Foundations

Amazon Web Services

Verify on Credly

Contact

Hiring for a backend or full-stack role? Let's talk.

Based in London (GMT / BST). I usually reply within 24 hours.