aronblero.

ENGINEERING / ARCHITECTURE / LEADERSHIP

Aron Bleier.

Senior Full-Stack Engineer | Technical Lead

London, UK

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Senior Full-Stack Software Engineer with end-to-end ownership of products and technical systems, from architecture and infrastructure through production delivery and team growth. First engineering hire at an early-stage startup, responsible for building and scaling the platform, establishing engineering standards, and leading technical decision-making. Experienced in scalable application architecture, cloud infrastructure, security, and distributed systems across web and mobile.

Experience

Admin Please · October 2024–Present

Lead Full-Stack Software Engineer — Admin Please, London.

  • First engineering hire, leading technical direction, architecture, infrastructure, security, and product engineering from initial build through production and team growth.
  • Architected and delivered a production web and mobile platform using Angular, TypeScript, RxJS/NgRx, Node.js (Encore TS), Prisma, and PostgreSQL.
  • Designed a shared web/mobile architecture with Capacitor, reducing development overhead by 40% while maintaining native mobile capabilities.
  • Grew the engineering team and currently lead five developers, overseeing architecture, delivery, code quality, and technical standards.

Octopus Technologies · May 2021–October 2024

Full-Stack Software Engineer — Octopus Technologies, Budapest.

  • Developed and maintained multiple production web applications across frontend and backend systems using TypeScript/JavaScript, React, Angular, Node.js, and Express.js.
  • Designed and implemented REST APIs and backend services supporting production applications and business workflows.
  • Improved backend performance through API and database optimisations, reducing response times by 25%.
  • Designed and optimised MongoDB schemas and queries for performance, scalability, and maintainability.
  • Built responsive, maintainable frontend applications using React and Angular, collaborating closely with product and design teams.
  • Contributed to system architecture, technical decision-making, and engineering standards across multiple projects.

Architecture & security

Architecture & security · Admin Please

Built and secured GCP infrastructure with strict IAM, environment isolation, CI/CD, and secure deployment workflows.

  • Built and secured GCP infrastructure with strict IAM, environment isolation, CI/CD, and secure deployment workflows.
  • Designed scalable PostgreSQL schemas, established zero-downtime migration strategies and rollback procedures for production releases.
  • Implemented event-driven and scheduled processing using Pub/Sub and cron-based workflows to support asynchronous platform operations.
  • Architected a custom end-to-end encryption system with device-based key management and QR-secured web session authentication.
  • Architected authentication and authorisation flows using Better Auth, including secure access control across web and mobile clients.
  • Established engineering practices across CI/CD, testing, code review, observability, and security-first development.

Education

University of Westminster · 2024

BSc Computer Science — University of Westminster, First-Class Honours, 2024.

    Project lab

    THE PROJECT LAB

    Curiosity, put into practice.

    Projects from my GitHub, putting ideas into practice.

    PROJECT 01

    GAME ENGINEERING

    Game AI

    A Unity project where enemies navigate a generated world and change behaviour as the player moves.

    Implemented A* and Dijkstra pathfinding on a grid. Enemy state machines switch between patrol, chase, attack, healing, fleeing, and ranged behaviour.

    UnityC#A*DijkstraState machines
    Explore the code
    PROJECT 02

    APPLIED AI

    Sign Language Recognition

    A video-to-prediction app for exploring word-level sign-language recognition.

    A Streamlit interface processes uploaded videos with OpenCV and MediaPipe, then runs TensorFlow/Keras models. Includes 40- and 200-word dictionaries, model comparisons, and animated 3D feature visualisations.

    PythonTensorFlowOpenCVMediaPipeStreamlit
    Explore the code
    PROJECT 03

    MACHINE LEARNING

    Credit Card Fraud Detection

    A machine-learning notebook investigating patterns in imbalanced transaction data.

    Explores neural networks and classical classifiers, feature scaling, SMOTE resampling, and evaluation using precision, recall, F1, ROC-AUC, and confusion matrices.

    PythonTensorFlowscikit-learnpandasSMOTE
    Explore the code
    PROJECT 04

    MOBILE DEVELOPMENT

    Weather & Places

    A native SwiftUI weather app with forecasts and a map for exploring places.

    Uses an observable view-model architecture, asynchronous weather requests, city geocoding, CoreLocation, and MapKit. Separate views cover current conditions, hourly and daily forecasts, and tourist locations.

    SwiftSwiftUIMapKitCoreLocationAsync networking
    Explore the code

    Skills

    Languages
    TypeScript, JavaScript, Python
    Frontend
    Angular, React, RxJS, NgRx, Capacitor
    Backend
    Node.js, Express.js, Encore TS, REST APIs, Better Auth
    Databases & ORM
    PostgreSQL, MongoDB, Prisma, Mongoose
    Cloud & Infrastructure
    GCP, AWS, CI/CD, IAM, Pub/Sub
    Architecture & Security
    System Architecture, Authentication & Authorisation, End-to-End Encryption, Secure System Design
    Leadership
    Technical Leadership, Engineering Hiring, Mentoring, Code Reviews
    AI & Developer Tooling
    MCP, Codex, Cursor, Claude Code, LLM-assisted Development, Agentic Workflow
    AI & Data Science
    TensorFlow, Keras, scikit-learn, NumPy, pandas, OpenCV, MediaPipe, Streamlit, Plotly, SMOTE
    Games & Native Mobile
    C#, Unity, A* Pathfinding, Dijkstra, State Machines, Swift, SwiftUI, MapKit, CoreLocation