Stefan Mayer
Technology Developer Degree Apprentice at Barclays
- stefanmayer@stefanmayer.co.uk
- stefanmayer.co.uk
- linkedin.com/in/stefan-mayer-3a3260251
- github.com/stefanmayer06
- stefanjake.substack.com
- United Kingdom
Profile
I'm an ambitious software engineer and computer scientist who is always eager to learn and innovate. Right now I'm a Technology Developer Degree Apprentice at Barclays UK , working as a backend developer on an integration team in Group Technology Infrastructure Services. Java, Spring Boot, Apache Kafka and Ansible are my daily tools.
Experience
Technology Developer Degree Apprentice (BA3) · Barclays UK
2026 – Present
Backend developer on an integration team within Group Technology Infrastructure Services.
Java · Spring Boot · Apache Kafka · Ansible · Microsoft Azure
Technology Developer Degree Apprentice (BA2) · Barclays UK
2024 – 2026
Backend developer on an integration team within Group Technology Infrastructure Services.
- - Built Apex detection inventory & execution APIs for the full Stonebranch.
- - engineered several cutting edge implementations of the Stonebranch platform
- that were compliant with Barclays strict data management standards.
- - managed many stakeholders during time sensitive projects & L3 live support issues.
- - preformed oncall and live support for BFTS (Barclays File Transfer Service).
Stone Branch · Java · Spring Boot · Apache Kafka · Ansible · AWS · Python · Fast API
Founder & Web Developer · Mayer Digital
2024 – Present
A small web studio helping businesses and creatives build a robust digital footprint, from concept and design through launch and beyond.
- Designed and built a portfolio site for pianist Luca Ambrosino with YouTube and Bandcamp embeds
- Tailored websites that reflect each client's brand, with hands-on support from concept to launch
HTML · CSS · JavaScript · Bootstrap · Tailwind CSS · WordPress
E-commerce & Web Projects · Jewellery industry
Until 2024
Managed e-commerce and web development projects, working across Magento, Azure and WordPress.
Magento · Microsoft Azure · WordPress
Selected projects
GCSE Dashbaord · Advanced Learning Platform
Next.js · React · Claude/GPT · AI-Intergration · stefanmayer.co.uk/projects/gcse-dashboard-server-vercel-app
Sentire · Reddit sentiment analysis for smarter trading
Real-time sentiment analysis of r/WallStreetBets posts and comments. A BERT model scores the community's mood and a live dashboard tracks how it moves with the market.
Svelte · TypeScript · Tailwind CSS · DaisyUI · Python · BERT · stefanmayer.co.uk/projects/sentire
Luca Ambrosino · Portfolio site for a local pianist
Created for a local musician to show potential clients his portfolio through a combination of YouTube links and Bandcamp embeds.
HTML · CSS · Bootstrap · JavaScript · stefanmayer.co.uk/projects/luca-ambrosino-portfolio
Kidney Stone Prediction · Kaggle Playground Series S3E12 — binary classification
End-to-end ML pipeline predicting kidney stones from urine physiology, using feature engineering and a CatBoost ensemble validated with stratified k-fold.
Python · Pandas · NumPy · scikit-learn · CatBoost · XGBoost · stefanmayer.co.uk/projects/kidney-stone-prediction
Research
Hybrid PQC–QKD security algorithms (First paper in progress · 2026). Researching hybrid schemes that combine post-quantum cryptography with quantum key distribution, so that communication stays secure even if one of the two layers is broken.