The architectural
heavy lifting,
owned end-to-end.
I take on the architectural heavy lifting most teams avoid — legacy systems at their breaking point, zero-downtime migrations, asynchronous platforms that have to stay calm under load. I lead from the front: own the rewrite, command the incident, find the vulnerability before someone else does.
Ten years of Python at the senior end of the stack, three years co-founding an AI traffic-optimisation startup, and a current role architecting the contract-intelligence platform that governmental, defence and infrastructure clients run multi-billion-dollar programs on. I deliver — and I take initiative, authority and leadership where the work demands it.
- Python
- PostgreSQL
- Celery
- Flask · Django
- TypeScript
- Docker · K8s
- GCP · AWS
- AI / LLMs
The work, day by day.
GitHub-style calendar of every Redmine event, GitLab MR / push and local commit (work + personal) across 3.5 years. Hover any day for the full breakdown.
“Gergely was responsible for our CI/CD pipelines and monitoring, and he was always the person we called when something went wrong in production. He led the effort to clean up and modernise our old Python codebase — no small task. One of the best engineers I have worked with.”
“I worked with Gergely for three years at Affinitext. He was great to partner with — we'd sit down, map out exactly what was needed, and agree on the best communication mechanisms and design patterns before diving in. Our collaboration was always smooth sailing.”
The signal
Initiative
I file more issues than I'm assigned and own them through to landing. Seventeen-plus long-lived initiative branches in three years, four pre-disclosure security reports in thirty days, an ASAP design-system rollout shipped unilaterally — all unprompted.
Authority
Two-time runtime owner of the platform's async substrate. De-facto owner of CI/CD, the mypy pipeline and compliance notifications. Recurring incident commander for production DB-lock and stuck-job classes. The person called when something goes wrong in production.
Leadership
Co-founder and CEO of an AI traffic-optimisation startup with two secured B2G contracts. Product Owner of an external EPAM design team. Bi-directional code review with senior engineers on release coordination. Executive-register communication with stakeholders.
Delivery
Top-4 contributor on a 10+ person team with 710+ commits. 200 MRs at a 61.5% merge rate. 138 tickets shipped across seven subsystem themes. Twelve-plus end-to-end freelance client projects in parallel with the Venturi founder track. I ship — and what I ship stays shipped.
Selected work
Celery Migration — Platform Async Substrate
2024Decommissioned a legacy XMLRPC / TGScheduler jobserver and migrated the platform onto a managed Celery framework I designed end-to-end. +10,787 LOC across 42 files, multi-tenant context restoration, 50+ legacy jobs ported. Runtime owner two years post-launch.
Checkout-Status Workflow — Full-Stack Rewrite
2025Ten-month, eight-version rewrite of the platform's core checkout-status workflow — the surface that touches every customer transaction. Python / SQLObject backend, ExtJS + Angular UI, SQL migrations and trigger logic. Persistence and tolerance for rework until it landed cleanly.
Userlog 24× Performance Fix
2026Two compounding bugs causing endless loads — missing SQL pagination on grouped queries plus inverted slicing in ReportJob. Real query-layer surgery, not a UI band-aid: P95 from 15.4 s to 0.67 s. Three rewrites before landing — quality over speed.
Security Research — Four Pre-Disclosure Reports in 30 Days
2026Dangling-IP subdomain takeover; CSRF tokens issued from a predictable Mersenne-Twister PRNG with state recovery through a 27-file import footprint; unauthenticated callback enabling SMS-MFA bypass and account takeover; leaked-credential audit. Each in executive register, with ISO 27001 framing and remediation plans.