I build real-time platforms that survive contact with real users.
.NET Developer with 3+ years of hands-on experience building full-stack platforms, desktop applications, cloud-hosted systems and Android products using C#, ASP.NET Core, SQL and modern software-engineering practices. Real-time platforms, cloud-native backends, and AI-ready architecture, shipped, tested, and running in production.
Est. 2022
Chichester, UK
Software for real businesses.
I'm Sergiu Giuglea, a software engineer based in Chichester, UK. I graduated with a First-Class Honours degree in Software Engineering and have spent the last few years building real projects across web, desktop, cloud, Android, databases and AI.
My strongest work is around C#, ASP.NET Core, SQL and real-time, full-stack platforms, but I'm not interested in reaching for technology just because it sounds impressive. I care about building software that solves the problem clearly, runs reliably, and can grow with the business.
So far I've built and worked on systems for mentorship, taxi booking and dispatch, football communities, Android display boards, database management, machine learning and AI assistants. Signal, the chatbot on this site, is one of those projects: a practical AI assistant built to answer real questions without becoming expensive to run.
I'm open to freelance work, collaborations and business software projects where the goal is simple: build something useful, ship it properly, and keep improving it.
What I can build
Applications and platforms built
Languages used across those projects
Years building software
Chat with my AI assistant
From production backends to AI-ready foundations, scoped to what your business actually needs, not what's trendy.
The engine room of your product: APIs, business logic and data, built on C# and ASP.NET Core so it still makes sense a year from now, not just on launch day.
A complete website or web app, front to back, built to feel responsive and alive rather than a form that submits and reloads.
Practical AI, not a science project: chatbots, automation and smart features that solve a real problem for your customers or your team. Signal, the chat widget on this site, is a live example, not a slide, and I can build the same kind of thing for your business.
Getting your app live and keeping it that way: hosted properly, monitored, and set up so new updates go out smoothly instead of being a nerve-wracking event.
Production platforms, independently developed products and technically substantial university projects, built across web, desktop, cloud, AI and Android. Click any one for the full story.
Have a system that needs to be built, rebuilt, or made AI-ready? I’m taking on new projects.
Start the conversationComplete systems, data projects and technical investigations developed throughout my Software Engineering degree, not professional work, but technically substantial in its own right.
Dissertation
Full-Stack Developer
A location-based football community platform that enables users to create teams, organise matches, join local games and discover nearby football grounds.
Machine learning project
Machine Learning Project
An end-to-end regression project predicting house prices from property size, bedrooms, bathrooms and location. Linear Regression performed best, reaching roughly 0.93 to 0.94 R² on this near-linear dataset.
Advanced programming project
Advanced Programming Project
A secure C# desktop application for managing customers, inventory, publishers and orders through a MySQL-backed architecture.
SQL database project
SQL Database Project
A relational university database for managing students, staff, modules, campuses, examinations and grades.
Data engineering project
Data Engineering Project
A data-analysis and database portfolio examining large datasets, data wrangling, SQL, NoSQL, scalability and machine-learning-assisted database optimisation.
Infrastructure design project
Infrastructure Design Project
A secure and scalable hybrid-cloud infrastructure proposal combining on-premises servers, cloud virtual machines, networking, firewalls, VPNs and disaster recovery.
Java programming portfolio
Java Programming Portfolio
A Java application demonstrating searching, sorting and algorithmic problem-solving using pseudocode, flowcharts, implementation and testing.
Team software-engineering project
Full-Stack Developer
An Agile university team project: an event and children's party-booking platform covering account registration, service and package browsing, availability checking, booking, payment and an administrative dashboard.
Languages
Backend
Frontend & Web
Mobile (Android)
AI & LLM
Databases
Cloud & DevOps
Practices
Other
A small, pointless, extremely satisfying game. Collect data packets, dodge latency spikes, don't hit the walls.
~/games/signal_runner.exe
WASD / Arrows to move
Swipe or tap the arrows to move
Grab the violet packets. Avoid the red spikes. Don’t hit the wall.
Oct 2024 / Present
Mentorise · Remote, London
Solo full-stack delivery of a mentorship, learning and career platform: matching engine, real-time messaging, courses, jobs, and secure Google Cloud deployment.
2023 / Present
GFS Taxi · Chichester
Continued a university taxi-management project independently and developed it into a deployed booking and dispatch platform, supporting customer bookings, driver allocation, schedules, Google Maps navigation, PDF receipts and office operations.
Side projects
AI chatbot on this site, built on the Claude API
Android app in Kotlin, in Google Play Closed Testing
Education
University of Bolton · 2025
Certifications
Whether it's a backend that needs to scale, a platform that needs real-time features, or a system that needs to become AI-ready, I'd like to hear about it.