$ whoami

Martin
Glogovský

Backend Software Engineer — Java / Spring Boot · Bratislava, Slovakia

I build backend systems that run real businesses. Java backend engineer with 4 years building and operating production systems on Java 17 / Spring Boot 3, PostgreSQL, and AWS — full-stack capable across React, React Native, and TypeScript, with production experience in payments, real-time messaging, and media pipelines.

view projects ↓contact
Steady
paying subscribers on a platform I built & operate
sub-35ms
detect-to-execute trading path, live & profitable
3×
platforms shipped solo — web, iOS, and Android
4 yrs
production Java / Spring Boot experience

$ ls projects/ --sort=impact

Selected Work

Goly Esa iOS app public listing on the Apple App Store with screenshots and 5.0 ratingGoly Esa app home feed with the community intro and express news postsGoly Esa membership screen with an active premium subscription, profile settings and order history
LIVE IN PRODUCTION

Góly Esá

Freelance client project · Aug 2024 – Present

Complete membership platform for a Slovak football-analysis brand — Spring Boot API, React web, iOS & Android apps, Stripe subscriptions, HLS video, realtime chat. Solo-built, live in production with a steady base of paying subscribers.

Steady
paying subscriber base, month after month
4
deliverables on one API — web, iOS, Android, admin
Java 17Spring Boot 3PostgreSQLReact
$ cat case-study.md
Goal Bot live operations console showing three monitored live matches with per-feed controls, order parameters, buy buttons and liquidity checks
NET PROFITABLE

Kalshi Arb Trading

Independent project · Jan – May 2026

A low-latency trading system for live-sports prediction markets: 5 racing real-time feeds, a sub-35ms detect-to-execute path, and an audited trade log. Ran live — 17.4% ROI (net of fees) across ~5,000 trades.

17.4%
ROI, net of fees
~5,000
live trades
TypeScriptNode.jsLow-Latency SystemsReal-Time Data
$ cat case-study.md
Live dashboard: gasoline retail vs wholesale price chart with geopolitical event markers and live forecast KPIsForecast cone: daily, weekly and monthly gasoline price forecasts with calibrated P5-P95 prediction bandsKalshi strike ladder comparing model probabilities against market prices for each strikeCalibration page: Brier score across the trading session versus the market, and a model reliability curve of predicted vs realized frequenciesPredictor ranking table: out-of-sample level RMSE and directional hit-rate per feature across 1-30 day horizonsWhy this forecast: exact Shapley feature-contribution panel explaining the predicted change, next to the live W ladder
NULL RESULT — BY DESIGN

Quant Research Platform

Personal R&D project · May – June 2026

Quantitative research platform for prediction markets — 10+ data pipelines, calibrated ML forecasting, React dashboard, LLM advisor. Built to test a trading thesis, and rigorous enough to falsify it.

10+
automated data feeds
~1,290
automated tests
PythonFastAPIReact 19TypeScript
$ cat case-study.md
Per-ticker earnings prep cards with EPS and revenue estimates, expected move and past print reactionsEarnings radar listing today's prints across the watchlist with estimates and reaction dataPrint replay pipeline: filing detected, parsed, features, signals, and the reviewed outcomeWalk-forward backtest run configuration and per-trade replay resultsCalibration and promotion gates with champion versus challenger engine comparison
PAPER-FIRST R&D

Earnings Trading Platform

Independent project · 2026 · in active development

Earnings-trading research platform: per-ticker prep boards, tick-level print replay, champion/challenger engine gating, and walk-forward backtests — paper-first by design.

Replay
every print re-runs through the full pipeline
Walk-fwd
backtests over the live ticker universe
Algorithmic TradingEarningsBacktestingSimulation
$ cat case-study.md

$ ls client-websites/

Websites for Clients

SIXNINE Wheels storefront hero showing a forged wheel collection on a performance car

SIXNINE Wheels

Freelance client project — e-commerce storefront + custom wheel-fitment configurator for a Slovak forged-wheel brand

DRL Trips landing hero — guided tours across Central Europe

DRL Trips

Freelance client project — marketing & booking site for a Central-European guided-tour operator (React + TypeScript)

Fisk & Skaldyr restaurant landing hero — elegant dark seafood-restaurant site with gold accents

Fisk & Skaldyr

Freelance client project — marketing & reservations site for an Aalborg seafood restaurant (React + TypeScript)

$ cat experience.log

Experience

Java Backend Developer @ DGT Factory

Oct 2022 – Dec 2025 · Bratislava

Backend developer in agile (Scrum) client teams for IIHF and TotalEnergies — management-system APIs, an on-premises-to-AWS migration (Cognito auth, Docker, zero-downtime data migrations), and production incident response with Dynatrace.

$ open resume.pdf — resume with the full breakdown — available on request

Freelance Software Engineer @ Client & independent projects

Aug 2024 – Present · Bratislava, Slovakia

All projects architected, designed, and developed solo.

  • Built and operate a creator-subscription content platform (similar to HeroHero) for a Slovak football-analysis brand — live in production with a steady base of paying subscribers.
  • Shipped the full stack: Java 17 / Spring Boot 3 REST API (PostgreSQL, JWT auth), React web app, and React Native (Expo) iOS + Android apps, deployed on DigitalOcean.
  • Built the full Stripe payment lifecycle — off-session subscriptions with 3D Secure, webhook-driven entitlements, duplicate-charge prevention, and zero-proration price migration of live subscribers — plus automated Slovak VAT invoicing.
  • Engineered a server-side FFmpeg-to-HLS media pipeline (video, podcasts, voice notes), real-time WebSocket/STOMP chat and forum, and FCM/APNs push, SMS, and email campaign delivery.
  • Additional client work: a custom CRM platform (Spring Boot + PostgreSQL, React TypeScript — in progress) and static marketing sites for two clients.
UCN Aalborg campus — modern glass building with the university's signature orange seats in the courtyard

$ cat education

AP Degree in Computer Science @ UCN Aalborg

Aalborg, Denmark · Aug 2021 – Feb 2024

Completed alongside full-time engineering work (remote)

$ ls skills/ --groups

Skills

./backend

  • Java 17
  • Spring Boot 3
  • Spring Security
  • Hibernate/JPA
  • REST APIs
  • Multithreading
  • JUnit
  • Mockito

./databases

  • PostgreSQL
  • MS SQL Server

./cloud-devops

  • AWS (EC2, ECS, Cognito)
  • DigitalOcean
  • Docker
  • CI/CD (GitHub Actions)
  • Maven
  • Git
  • Dynatrace

./payments-real-time

  • Stripe
  • WebSocket/STOMP
  • FCM/APNs push
  • FFmpeg/HLS

./frontend-mobile

  • React
  • TypeScript
  • React Native (Expo)

./other

  • Node.js
  • Python (FastAPI)

$ ./get-in-touch.sh

Need it built —
and kept running?

Open to full-time Java backend roles and selected freelance work. Code walkthroughs of any project available on request.

glogovsky.martin1@gmail.comLinkedIn ↗