Aleksandar Hristov> Full-stack Software Engineer

// 01About

// 02Experience

1. Jun 2023 - Sep 2026

   Software Developer

   Septeo (formerly stp.one)

   1. STAGE_01RAG & LLM R&D

      • First team member to work full time on RAG and LLMs, building a run of smaller AI projects.
      • Built an AI legal assistant that answers questions from uploaded case documents and a knowledge base of German legal texts.
      • One of those projects grew into LegalTwin, built with a small group of developers: it summarises a case and pulls out key people and dates into a single-page view.

   2. STAGE_02German court data foundations

      • Scraped and processed large volumes of public German court decisions into a foundation for search and retrieval.
      • Fine-tuned open-source LLMs on that data to improve the accuracy of legal answers and document analysis.

   3. STAGE_03LegalTwin integration

      • Integrated LegalTwin into stp.one's established legal products.

   4. STAGE_04Amberlo

      • Moved to Amberlo after its acquisition: an all-in-one law practice management platform (clients, cases, time tracking, billing, client portal) used by law firms across Europe.
      • Led the User Management module and built Matter Management, which ties together clients, documents, time entries and billing for each case.
      • Developed KYC/AML client onboarding checks and Conflict Checking, working across PostgreSQL, .NET APIs and Angular.

   • Python
   • LLMs
   • RAG
   • C#
   • .NET
   • Angular
   • PostgreSQL
2. Jan 2022 - Present

   Game Programmer / Senior Server Engineer (Freelance)

   Hungry Billy

   • Senior Server Engineer on a mobile wrestling game based on a major licensed IP for a large publisher (under NDA), soft-launched in 2026.
   • Designed and built backend services for live gameplay, player data and online features through development and soft launch.
   • Built a game launcher with web-served updates using Unreal Engine's Chunk Downloader and C++.
   • Implemented matchmaking with PlayFab, CloudScript, Cosmos DB and Unity; built an immersive gym experience tracking workout data with AWS and PlayFab.
   • Designed a procedural content generation tool for a dungeon crawler in Unity.

   • Unreal
   • Unity
   • C++
   • C#
   • PlayFab
   • AWS
3. Feb 2022 - Jun 2023

   Software Engineer

   Immersive Business · Falmouth & Exeter Universities

   • Built a VR experience for an unmanned modular survey boat in Unreal Engine and C++ to improve marine data collection.
   • Built a VR relaxation and pain-relief garden, a VR gallery with file explorer, and a grid building system for pontoon bridges and docks in Unity.
   • Developed a web AR app augmenting paintings via image tracking with Unity WebGL, Three.js and A-Frame.
   • Built a mixed-reality GPS tracking app for truck visualisation and route efficiency with Unity, C# and SQL.

   • Unity
   • Unreal
   • C#
   • C++
   • WebXR
4. Sep 2021 - Feb 2022

   Immersive Technician, Team Lead

   Immersive Business

   • Led a team of programmers, artists and designers building themed floors for medical, industrial and art purposes.
   • Built core functionality on Scriptable Objects, giving Falmouth Games Academy an attractive way to showcase game art.
   • Integrated OpenXR with the ART DTrack system for player and motion tracking, a success that led to full-time work for the team.

   • Unity
   • OpenXR
   • ART DTrack
5. Feb 2017 - Sep 2021

   Software Engineer

   BSTechnologies (formerly BankSoft)

   • Built the front end of a large Bulgarian bank's leasing module.
   • Full-stack development of car, housing and personal loan modules for Bulgarian and international banks using .NET MVC, C#, Oracle and MySQL.
   • Built water supply billing and payments, and a waste-water laboratory research module, for government-funded projects.

   • .NET MVC
   • C#
   • Oracle
   • MySQL
   • JavaScript

// 03Skills

// 04Projects

More personal and university projects on GitHub ↗

// 05Education