Andrey Stoev
Software Engineer · Mathematician · Statistician
Backend Developer & Systems Architect based in Sofia, Bulgaria. I build cloud-native microservices and AI-powered automation for enterprise-scale systems — currently at SAP, where I architect solutions that orchestrate SAP ECC → S/4HANA Cloud migrations. My background spans high-throughput iGaming platforms (Flutter International, Evolution), mathematical modeling, and distributed systems engineering. I work primarily in Java, with Python for tooling and automation, and have hands-on experience integrating LLMs and building AI agent pipelines.
Senior Application Engineer
I design cloud-native microservices and AI agent pipelines that automate SAP ECC → S/4HANA Cloud migrations — turning manual, error-prone data assessments into deterministic, self-healing workflows. I drive architecture decisions, lead code reviews, and mentor engineers across the migration platform.
Java-Quant Developer
I architect and deliver statistically validated Java game servers for live casino products — designing complex game logic and mathematical models that meet precise RTP and volatility targets. I own the full lifecycle from design and platform integration through TDD, CI/CD deployment, and production certification, collaborating cross-functionally to ship fully documented, regulation-ready game systems.
Game-Math Designer
I develop engaging gameplay by balancing complex probabilities and mechanics, while scripting automated tools and analyzing statistical data to solve development challenges. I collaborate cross-functionally to implement high-quality game features within a robust Slot Framework, adhering to strict code standards and agile methodologies throughout the entire lifecycle.
- Modern Java Technologies
- Data Structures and Algorithms
- Design and Analysis of Algorithms
- Object-Oriented Programming
- Intelligent Systems (Data Mining)
- Databases & Web Technologies
- Distributed Systems
- Web Application Development with Java
- Operating Systems
- Differential and Integral Calculus
- Statistics and Empirical Methods
- Complex Analysis & Linear Algebra
- Operations Research
- Differential Equations and Applications
- Distributed Software Systems
- Computer Networks & QA
- Design and Integration of Software Systems
- Finite Automata Applications
- Fast Algorithms in Data Structures
- Advanced Combinatorics and Graph Theory
- Advanced Number Theory
- Engineered a flexible reel set generator preserving exact tile proportions across all reels with full configurability of shuffling logic, stack sizes, and payout-driven layout constraints.
- Implemented weighted stack selection with configurable probabilities for fine-tuned RTP and volatility control.
- Deterministic generation guaranteeing convergence to valid solutions for all major payout strategies.
- Developed deterministic bonus acquisition with configurable payout filtering and manifest-driven progressive bonus tracking.
- Engineered bet multiplier systems increasing probability of triggering specific bonuses with precise RTP balancing.
- Both functionalities accompanied by simulation modules and detailed documentation.
Full-stack web app for outdoor enthusiasts to share, discover and review custom routes with interactive maps, photo uploads, role-based access control, and weather API integration.
Online marketplace for vehicles with advanced multi-parameter search, live currency converter (BGN/USD/EUR), email verification, OAuth2, Prometheus/Grafana monitoring, and i18n support.
Boston Housing Dataset regression model with EDA, correlation heatmaps, and scatter plots using Python data science stack.
Full-stack Spring Boot casino Blackjack game with complete user management, Luhn-validated payment system, all standard rule variants, Spring Security + reCAPTCHA v2, and EN/BG i18n.
Python automation tool monitoring stock price movements via Alpha Vantage, fetching top news from NewsAPI, and sending formatted Twilio SMS alerts on configurable price swings.
Spring Boot REST API simulating Relax Gaming-style avalanche (cascade) slot mechanics on an 8×8 grid with cluster-based pays, long-run RTP/volatility simulations, and interactive Swagger UI.
| Game | Strategy | Reels / Rows | Vol | Hit Rate | MSM | BB/AB | Released |
|---|---|---|---|---|---|---|---|
| Tricks and Treats | Paylines (LTR) | 4-4-4-4-4 | 2 / 5 | 25.98% | 1,697x | N/N | 2022-10-20 |
| Blobsters Clusterbuster™ | Clusters Pay | 9x9 | 3 / 5 | 34.76% | 7,517x | N/N | 2023-02-16 |
| Transylvania: Night of Blood | Ways | 4-4-4-4-4-4 | 4 / 5 | 27.76% | 7,439x | N/N | 2023-02-16 |
| Red Hot BBQ | Paylines (LTR) | 3-3-3-3-3 | 4 / 5 | 29.74% | 1,110x | Y/N | 2023-04-26 |
| Magic Powers Megaways™ | Megaways™ | 6x7 | 4 / 5 | 25.73% | 25,440x | N/N | 2023-04-27 |
| Moods of Hecate | Paylines (LTR) | 3-3-3-3-3 | 3 / 5 | 17.24% | 2,248x | N/N | 2024 |
| Joker Mega Wins | Paylines (LTR) | 3-3-3-3-3 | 3 / 5 | 25.04% | 5,000x | N/N | 2024 |
| Pharaoh's Eternal Glory | Paylines (LTR) | 3-3-3-3-3 | 4 / 5 | 31.33% | 4,500x | N/N | 2025 |
| Tumble Dwarf and the Library of Secrets | Paylines (LTR) | 3-3-3-3-3 | 2 / 5 | 28.08% | 1,500x | N/N | 2025 |
| Armando Rico and the Book of Dragons | Paylines (LTR) | 3-3-3-3-3 | 4 / 5 | 30.30% | 1,500x | N/N | 2025 |
|
Golden Leprechaun: Knock! Knock! Knock!
Platinum
Top 5% · PokerStars
|
Paylines (BW) | 3-3-3-3-3 | 3 / 5 | 21.99% | 1,300x | N/N | 2025 |
| Book of Sacrifice | Paylines (LTR) | 3-3-3-3-3 | 3 / 5 | 26.00% | 5,000x | N/N | 2025 |
| Robin Hood Loot'n Win | Paylines (LTR) | 4-5-6-5-4 | 3 / 5 | 19.00% | 4,500x | N/N | 2025 |
| Lion's Cave | Paylines (LTR) | 3-3-3 | 3 / 5 | 23.50% | 6,300x | N/N | 2025 |
| Tumble Dwarf: Enchanted Reels | Clusters Pay | 7x7 | 5 / 5 | 32.44% | 5,000x | Y/N | 2025 |
|
Classy Vegas Pots
#1 Most Played · Sky Vegas UK
|
Paylines (ADJ) | 4-4-4-4-4 | 2 / 5 | 22.02% | 1,500x | N/N | 2024 |
|
FanDuel: Classic Invaders
Innovative Feature
Up to 7 Nested Choices
|
Paylines (LTR) | 5x3->5x5 | 4 / 5 | 20.77% | 2,200x | Y/Y | – |
VOL — Volatility Profile
LTR — Left to Right RTL — Right to Left BW — Both Ways ADJ — Adjacent Tiles
MSM — Max Stake Multiplier BB — Bonus Buy AB —
Ante Bet
Published articles and problems in Bulgarian mathematics and informatics journals (МАТЕМАТИКА+ — M+321, M+335, M+351, M+359, article "Around Paul Finsler and Hugo Hadwiger Inequality") and problem solutions in the world-wide popular science magazine Квант (Quantum).