Intro

Koushic Sumathi-Kumar

Full-Stack Developer

Brighton, UK

Obsessed with the details that make products feel right.

About

Who I am

I'm a full-stack developer at Campsites.co.uk, building the web platform and iOS/Android app for a UK holidays site. I have a particular interest in frontend and UX, and I've been designing in Figma to bring more polish to the interfaces I build. Outside work I play chess and tennis, and I spend a lot of time learning more about UX.

Experience

Where I've worked

A timeline of my professional journey.

Jun 2025 — Present
Current
Junior Full-Stack Developer
Campsites.co.uk
·
Haywards Heath, UK
Building and maintaining features across a UK holidays platform serving 10m+ annual users.
Restructured part of the booking flow to strengthen account security, shipped behind a feature flag for safe rollback.
Built quick search filters for the web and app, handling campsite and pitch-level facilities whose behaviour changes by search type.
Built the app's interactive map with custom pins, Mapbox clustering, and platform-specific handling for iOS and Android, tuned for smooth performance with large numbers of listings.
Next.js
React
Material UI
Expo
React Native
TypeScript
.NET
C#
Azure
Transact-SQL
Redis
Git
Sep 2024 — Jun 2025
Lab Demonstrator
University of Sussex
·
Brighton, UK
Teaching assistant for databases and software engineering modules.
Delivered hands-on support to groups of students across SQL and Software Engineering practicals.
Prepared instructional materials in collaboration with academic staff.
Assessed student understanding, adapting explanations to different learning styles
SQL
Git
SWE
Leadership
Public Speaking
Mentoring
Communication
Teamwork
Jul 2024 — Sep 2024
Full-Stack Software Intern
University of Sussex + Sprint Electric Ltd
·
Brighton, UK
Innovate UK Knowledge Transfer Partnership project building an Industry 4.0 telemetry system.
Built a full-stack event and alert management application integrating with industrial motor controllers.
Implemented real-time notifications system using WebSockets/PubSub and InfluxDB, integrated to an existing production system
Delivered the project end-to-end, from initial design through to production integration.
Django
Python
React
JavaScript
InfluxDB
WebSockets
Git

Education

Academic background

78.9%

Weighted average

First Class Honours

BSc (Hons) Computer Science

University of Sussex, Falmer · 2022 — 2025

14 of 15 weighted modules at First class level

Highlights

Year 2 is weighted 40% with an average of 79.5%. Year 3 is weighted 60% with an average of 78.5%. Weighted total 78.9%.

First year doesn't count towards the final degree.
Each module's share of the final degree is shown next to its name.
Hover/Tap a module to see how much it added to the final grade.

Year 22023/24 · 40% of degree · 79.5% avg
Module	Mark and share of degree
Natural Language Engineering 5% of degree	89%, added 4.45 points to the final grade
Computer Networks 5% of degree	87%, added 4.35 points to the final grade
Operating Systems 5% of degree	80%, added 4.00 points to the final grade
Software Engineering 5% of degree	80%, added 4.00 points to the final grade
Program Analysis 5% of degree	79%, added 3.95 points to the final grade
Compilers and Computer Architecture 5% of degree	77%, added 3.85 points to the final grade
Fundamentals of Machine Learning 5% of degree	75%, added 3.75 points to the final grade
Databases 5% of degree	69%, added 3.45 points to the final grade

Year 32024/25 · 60% of degree · 78.5% avg
Module	Mark and share of degree
Web Applications and Services 7.5% of degree	88%, added 6.60 points to the final grade
Web 3D Applications 7.5% of degree	82%, added 6.15 points to the final grade
Individual Project 15% of degree	81%, added 12.15 points to the final grade
Limits of Computation 7.5% of degree	79%, added 5.93 points to the final grade
Comparative Programming 7.5% of degree	76%, added 5.70 points to the final grade
Human-Computer Interaction 7.5% of degree	71%, added 5.33 points to the final grade
Computer Security 7.5% of degree	70%, added 5.25 points to the final grade

Year 12022/23 · Didn't count towards the final degree

Data Structures & Algorithms
Further Programming
Computer Systems
Multimedia
Introduction to Programming
Mathematical Concepts
Professional Skills
Programming Concepts

Projects

Things I've built

Showing 3 of 11 projects

01 / 03 · 2026
KnowWhere - HackSussex 2026 Winner
completed
An AI-powered mapping app encouraging exploration and discovery of nearby POIs. Built in 24 hours at HackSussex 2026.
Case study Devpost
ElevenLabs
Google Places API
Gemini
React Native
Expo
TypeScript
Django
Python
Scan the area around you
Tap a place to hear its audio guide
02 / 03 · 2025
Turret Defense
completed
A 3D tower defense game where you are a turret defending against waves of enemies approaching from all directions.
Case study
React
Three.js
Blender
Express.js
Zustand
SQLite
03 / 03 · 2025
Private repo
Workload Allocation System
completed
Developing user-friendly interfaces integrated with existing data to support faculty management and workload allocation for the University of Sussex .
React
TypeScript
Material UI
Django
Python
SQLite