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SYSTEMS & FULL-STACK SOFTWARE ENGINEER
Available

MACIEK
GENEJA

Building high-performance web applications, microservices, and deterministic data platforms. Systems Placement Developer at Next and open-source contributor to T3 Code.

Python
TypeScript
Next.js
React 19
PostgreSQL RLS
MySQL
Docker
PyTorch
C++
Tailwind
MongoDB
PHP
Python
TypeScript
Next.js
React 19
PostgreSQL RLS
MySQL
Docker
PyTorch
C++
Tailwind
MongoDB
PHP
Maciek Geneja
Maciek GenejaCS @ Loughborough

I build high-performance
systems & software.

Computer Science undergraduate at Loughborough University (First-Class Honours across 1st & 2nd Year). Systems Placement Developer at Next plc within the PIM (Product Information & Management) Strategic Team. Experienced across C#, .NET, Blazor WASM, Python, PostgreSQL RLS, OpenCV, and modern distributed web architectures. Combines strong academic grounding in algorithms and discrete logic with practical experience building secure, high-throughput systems. I also contribute to T3 Code, including merged support for Antigravity subscription quotas and usage limits.

📍 UK🏢 Next plc Systems Placement
Academics
1st Class Honours

1st & 2nd Year • Loughborough CS

Placement Forefront
Next PIM Strategy

AI Attribution & Blazor WASM

Architecture
Valdris Sports Science

PostgreSQL RLS & AI Firewall

Full-Stack & Systems
Microservices & CV

C#, Python, React & Docker

Academic Rigor & Algorithmic Foundations

BSc Computer Science — Loughborough University

1st Class (1st & 2nd Year)
Logic for Computer ScienceDiscrete Math & Logic
86%
Mathematics for Computer ScienceApplied Mathematics
77%
Formal Languages & Theory of ComputationTheoretical CS
76%
Computer GraphicsVisual Computing
76%
Introduction to AlgorithmsCore Algorithms
75%
Embedded Systems ProgrammingLow-Level Systems
75%
Operating Systems, Networks & InternetSystems & Infrastructure
71%
A-Levels: Mathematics (A), Physics (A), Computing (A)GCSEs: 7x Grade 9, 2x Grade 8, 2x Grade 7
AU Athletics

Loughborough AU Volleyball representative & competitive Basketball player.

Leadership

Towers Hall Committee RAG Representative; charity fundraising & event coordination.

Bilingual

Native English and Native / Bilingual Polish communication.

Featured Case Studies

High-performance software systems, computer vision platforms, enterprise security architectures, and embedded engines.

Open Source
Contributions

Improvements contributed to the tools I use, reviewed by their maintainers and merged upstream.

My GitHub profile
Open-source contributor
Merged

T3 Code

Antigravity subscription quotas & usage limits

Contributed subscription quota tracking for the Antigravity provider, with web and mobile displays for Gemini and shared Claude/GPT limits and reset times when available.

Added tests and documentation, and addressed review feedback on OAuth token handling and authenticated redirects. Accepted and merged into the upstream main branch.

TypeScriptReactOAuthAPI IntegrationTesting
View merged PR #17530
CORE_SYSTEMSID: MASEEEK_PROTO_01
Live Activity
Core Languages
96%
Systems, AI & Vision
92%
Cloud, Security & Data
94%
Enterprise & Full-Stack
98%
Live Activity Log
>Asserting PostgreSQL RLS tenant boundaries...
>Compiling Blazor WASM microservice...
>Computing 28-day rolling z-score baselines...
Module_1

Core Languages

Python (Advanced)C# / .NETTypeScriptJavaC/C++SQLPHP
Module_2

Systems, AI & Vision

OpenCV / VisionClaude SDKPyTorch / TFNumPy & PandasFSM (Arduino)Polynomial Regression
Module_3

Cloud, Security & Data

PostgreSQL RLSMySQL (Pool/Soft-Delete)DockerMongoDBGDPR Article 9GitHub Actions CI/CD
Module_4

Enterprise & Full-Stack

Blazor WASMNext.js & React 19Node.js & ExpressFlaskVitest & PlaywrightTailwind CSS
Next plcActive Position
July 2026 / Active Placement
🎯 PIM Strategic Team
Systems Placement Developer — PIM Strategy & Enterprise Architecture

Secured competitive 12-month industrial placement in the Systems Team of a FTSE 100 retailer. Leading UI re-architecture for AI Attribution 2.0 using Blazor WebAssembly in a multi-repository, multi-solution microservice ecosystem. Developing internal engineering playbooks and onboarding fellow developers into structured agentic workflows — codifying domain context (CONTEXT.md, ADRs), designing deep-module boundaries to contain blast radius, and enforcing deterministic verification gates.

Blazor WASMC# / .NETMicroservicesAI Attribution 2.0Agentic SystemsEnterprise Architecture
Valdris
July 2026 – Present
🎯 Core Architecture & Compliance
Senior Full-Stack Engineer / Technical Architect

High-performance sports science multi-tenant analytics platform providing athlete readiness scoring and compliance gating. Implemented PostgreSQL Row-Level Security (RLS) bound to JWT claims, GDPR Article 9 dynamic data masking, deterministic Composite Load Score (CLS) engine with 28-day rolling z-scores, Anthropic Claude AI regex firewall, and Vitest/Playwright cross-tenant test suites.

PostgreSQL RLSGDPR Article 9Claude SDKVitest & PlaywrightDeterministic ScoringSports Science
Outlier AI
Nov 2024 – Present
🎯 Data Science QA
AI Training Contributor (Data Science)

Authoring comprehensive evaluation rubrics to benchmark LLM accuracy and reasoning against expected outcomes. Writing and executing Data Science Python scripts to validate model outputs, diagnosing logic errors, and mitigating hallucinations.

PythonAlgorithmsModel EvaluationData Science QACode Verification
Co-op
Oct 2023 – Oct 2025
Operations & Customer Experience

Demonstrated strong time management and resilience by balancing a demanding Computer Science degree with part-time retail work, collaborating within a 15+ member team to consistently hit operational targets in a fast-paced environment.

OperationsResilienceTeam Leadership

Areas of Expertise

From low-level system design and CV algorithms to full-scale web platforms.

01

Full-Stack Web Engineering

Production-ready, highly responsive web platforms built with modern frameworks like Next.js 16, React 19, and Node.js with strict sub-450ms performance targets.

Next.js App RouterReact 19TypeScriptTailwind CSSAPI Design
02

AI Systems & Computer Vision

Integrating edge computer vision pipelines, multi-modal LLMs (Gemini), trajectory physics modeling, and real-time inference into intuitive web applications.

OpenCV / VisionGemini APIPredictive PhysicsFlask / FastAPIPython
03

High-Performance Architecture

Crafting scalable cloud infrastructure, secure JWT authentication architectures, and hardware-accelerated fluid UI interactions.

Docker / CloudJWT & RBACMySQL & SQLiteCore Web VitalsWASM / .NET
Available for high-impact roles & projects

LET'S
BUILD.