Bonvo Consulting — Budapest / Worldwide
The architectural heavy lifting most teams avoid.
Legacy rescue. Zero-downtime migration. Distributed systems, security, and applied AI. Bonvo is a senior software architecture practice that takes ownership when the system reaches its breaking point — and builds what comes next.
- PYTHON
- TYPESCRIPT
- DJANGO
- CELERY
- POSTGRESQL
- REDIS
- KUBERNETES
- TERRAFORM
- GCP
- AWS
- AZURE
- REACT / NEXT.JS
- CLAUDE / MCP
Services
Hard problems, taken end to end.
Six ways to engage — each one scoped, owned, and delivered by a senior architect, not handed down a bench.
Legacy Modernization & Zero-Downtime Migration
Replacing the systems you can't turn off: strangler-pattern rewrites, live cutovers, and multi-tenant data migration without a maintenance window.
Distributed & Async Systems Architecture
Task orchestration, job substrates, and long-running pipelines designed to be observable, restartable, and boring in production.
Security Review & Vulnerability Research
Offensive-minded review of authentication, authorization, and session architecture — with pre-disclosure-grade reporting.
Applied AI & LLM Engineering
LLM pipelines, MCP servers, and AI-assisted engineering workflows that ship to production — not demos.
Fractional Architect / Staff Engineer
Ongoing senior ownership inside your team: architecture direction, incident command, and the reviews nobody else can give.
Technical Due Diligence
An architect's read of a codebase, team, and infrastructure before you invest, acquire, or scale it.
The system
A backend built to not fail quietly.
Clients to data, with security and observability as first-class concerns — the shape of a system that survives production. The async substrate is where most platforms rot; it's where Bonvo starts.
How it connects
Six services, mapped to the work.
The same capabilities recombine per domain — security and distributed systems underpin almost everything.
Industries
Tailored to the domains Bonvo knows in production.
From regulated GovTech to funded startups — the same senior ownership, shaped to your world.
Approach
Subsystems and rewrites. Not patches.
Most consultancies bill for advice. Bonvo takes ownership. Every engagement starts by mapping exactly what is needed — the communication mechanisms, the design patterns, the failure modes — and agreeing on it before a line is written. Then the work is executed with the discipline of someone who has been the incident commander when it breaks at 2 a.m.
Map
Understand the system, its history, and its real constraints before proposing anything.
Own
Take end-to-end responsibility for the subsystem, the migration, the deadline.
Harden
Leave behind observability, tests, docs, and a team that can run it without you.
Selected Work
A track record in production, not in decks.
— A few of the things shipped
Bonvo Ski MapsMobility · iOS
TikTok-NewsAI · Media
RiskGuardFintech · Risk
trut.huWeb
Bonvo for BusinessMobility · B2B
CryptoLyticsFintech
GamifiedTradeFintech
DiffusionGemmaAI · ML
Trajectory
A decade, connected.
Each role added a domain and a toolset — compounding into the practice. Milestones on the left, the stack first adopted in each era on the right.
- 2015eCommerce
UNDEFASA · Magento Developer
PHPMagentoMySQLjQuery - 2018AI · Mobility · B2G
Venturi Systems · Co-Founder & CEO
PythonGoogle CloudDockerNumPy / MLJavaScript - 2021Health · Public Sector
Pulilab · Back End Developer
DjangoScrapyVue / NuxtOpenAIPandas - 2023GovTech · Defence
Affinitext · Senior Engineer, Architecture
CeleryTypeScriptSentrymypyTerraformClaude Code / MCP - 2026Consulting
Bonvo Consulting · Founder · Principal Architect
Next.jsReact 19Agentic AI
Engagements
Built for the moment you need someone senior — now.
Bonvo works with international teams — especially in the US and UK — and with companies across Central and Eastern Europe. English-first, with native Hungarian and Ukrainian and fluent Russian when the engagement crosses the region.
A system is failing, a deadline is fixed, and the team is underwater. Days to weeks. Immediate start.
A migration, rewrite, or new subsystem delivered end to end. Weeks to months.
Recurring senior capacity: architecture direction, reviews, incident command. Ongoing.
A decision-grade assessment of a codebase and team. One to three weeks.
Contracting, consulting, and staff-engineer engagements are all on the table — the shape follows the problem.
The practice scales
One architect accountable. A team when the job needs it.
Bonvo is led hands-on by one senior architect. But you are never limited to one pair of hands: the practice scales a vetted senior team up to the size a job requires — and back down when it's done — without ever changing who owns the outcome.
One accountable owner
Every engagement is owned end to end by Gergely Kovács — the architect who does the work, commands the incident, and signs off on the result. That never changes.
A senior bench, on demand
When a build needs more hands, Bonvo assembles a vetted team of senior engineers scaled to the job — from a solo rescue to a full squad — and stands it down when the work is done.
No bench-warming, no dilution
You pay for the size the problem needs, not a fixed team. The standard stays senior; the outcome stays owned by one person.
What colleagues say
The first people Bonvo worked with.
Recommendations from the engineers, architects, and the CEO who have built and shipped alongside Gergely — the practice's founding testimonials.
I had the pleasure of working with Gergely over the past 3.5 years, and he consistently stood out for his collaborative spirit and genuine team-first mindset. He is the kind of person who lifts those around him, is always eager to learn, is quick to support his colleagues, and is unfailingly positive in his approach. One project that showcased his capabilities was the Celery project, where he took on the substantial task of rewriting a legacy Job Server into a modern system. He delivered this with zero downtime, ensuring complete business continuity throughout — a testament to his diligence and commitment. Beyond the technical work, what I valued most was Gergely's attitude. He brings energy, humility, and a real willingness to grow, and he makes any team better simply by being part of it, and I recommend him warmly.
I worked with Gergely at Affinitext, where I was the lead developer, and he was a senior Python developer. I can say with confidence that he is one of the best engineers I have worked with. 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 also led the effort to clean up and modernize our old Python codebase, which was no small task. He solved some very difficult technical problems during his time with us — things like database incidents, complex migration issues, and performance problems in our backend. These are not easy situations, and he always handled them well. But what I appreciate most about Gergely is how he communicates. He can explain technical concepts simply to non-technical people, which is uncommon for a developer at his level. This made him very valuable not just on the engineering team, but across the whole company.
I worked with Gergely for three years at Affinitext. As a frontend developer, coordinating with the backend can sometimes mean a lot of shifting tasks back and forth, but with Gergely, our collaboration was always smooth sailing. We worked closely on a project that needed both tricky bug fixes and new features across the stack. 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. Beyond his technical skills, Gergely is super proactive about team processes. He noticed our ticketing system needed an upgrade, so he went ahead and built better templates that made tracking and handing off issues much easier for everyone. He also pushed forward some really useful AI workflow improvements. He's a great teammate, writes solid code, and genuinely cares about making the whole team more efficient. I highly recommend him.
I had the pleasure of working alongside Gergely, and it was one of the most enjoyable collaborations of my career. He brings a rare combination of energy, integrity, and curiosity to everything he does. Gergely is genuinely up to date with the AI landscape and the latest tools and methodologies, and what stood out most was his willingness to share that knowledge with the whole team — constantly experimenting with new tools to find better, faster ways of working. Beyond the technical side, Gergely is the kind of person who holds a team together: helpful, approachable, and always ready to support others. Working with him was a real privilege, and I sincerely hope our paths cross again. Any team would be lucky to have him.
If it's breaking, or about to — talk to us.
A first conversation costs nothing and usually clarifies more than a week of internal debate. Write in English, Hungarian, Ukrainian, or Russian.
Response within one business day · Budapest (CET) · Remote-first, worldwide