About Fluvius

Engineers, not vibe coders.

We read and write the languages ourselves — JS/TS, Python, PHP, C++ — and can debug by hand. AI multiplies our output; it never replaces engineering judgment. Governments, banks and funded startups have trusted us with it for ten years.

7+ years
Many clients stay that long
200+
Clients served
100%
Job Success Score
Since 2017
Same delivery discipline
What you're buying

How we keep clients for ten years.

Three of the Fluvius team in the office holding boxes of Fluvius-branded cupcakes
01
Responsible delivery

We care — every feature ships from experienced hands.

02
AI-assisted development

AI does the volume work; engineers keep the judgment.

03
Founder-led discovery

A founder scopes your project — and stays in your Slack.

04
Hard sectors, live

SaaS · ERP · e-commerce · banks · government — in production.

05
A trial month, in writing

Either side can end the first 30 days without notice or penalty.

06
You own all of it

Worldwide, without limit — and anyone we bring on assigns their IP to you in writing.

In the room

We show up where the work is.

San Francisco, New York, Los Angeles, Miami, London, Dublin — founders meet the people who build their product, at their table.

See the work →
Two of the Fluvius team at a client's office in New York, brick buildings through the window behind them
Working from the client’s office · New York
Summit floor · Miami Beach
Our deck, on the floor · San Francisco
Fluvius on site for the Westfield project in London
Westfield, on site · London
Immerse Global Summit attendee badge — Georgiy Gres, Fluvius USA Inc, Fontainebleau Miami Beach
Fluvius USA Inc · #IGSMiami
Georgiy Gres of Fluvius at the Guinness Enterprise Centre in Dublin, Ireland
Guinness Enterprise Centre · Dublin
Between meetings · New York
Pitching over a laptop · San Francisco
The toolchain
frontier tools · experienced hands
Claude Code & Design
Claude Fable 5

Advanced agentic workflows — plan, build, test, review — plus interface design in the same toolchain, so design reaches code without handoff loss. Every line is read by the engineer who ships it. A new Anthropic release goes into production work within days.

Spec-driven development
Written spec first

The most effective way to work with AI today: an agreed written specification and a living map of your project's architecture, then code generated against it. The map is what keeps an agent inside your system's rules — and what lets any senior engineer pick the project up on day one.

Pipelines & review
In your repo

Every change moves through the same gate: typed build, test suite, dependency and security scan, an automated review pass — then a senior engineer signs it off. It all runs in your repository, on your cloud, under your keys. You own the code from the first commit.

Hardware
MacBook Pro

Apple silicon, top-spec, every engineer — with generous memory, so full test suites, containers and local models run side by side. Fast machines under a disciplined setup.

Founders
together since 2017 · 25 years of production software between them
Anton Yakushyn and Georgiy Gres, co-founders of Fluvius
Anton YakushynCo-founder
Georgiy GresFounder & CEO
01
Anton Yakushyn
Co-founder · 15+ years in engineering
BUILT  real-estate ERP · real-time computer vision · bank onboarding

The deep technical half of the founding pair — fifteen-plus years across JS/TS, Python and PHP, and the engineer the hardest architecture questions land on. He sets the data model, the service boundaries and the scaling path before product code is written, and he keeps the standard for code review, testing and security across every team.

02
Georgiy Gres
Founder & CEO · 10+ years · MBA
OWNS  discovery · the written plan · your Slack channel

Ten-plus years in software and an MBA behind the commercial side: scope, budget, delivery risk and the commitments Fluvius makes to you. He runs discovery himself, writes the plan you get before any contract exists, and stays in your Slack channel for the life of the project — the same person, the same answer, every week. He also builds the AI layer with his own hands — agents, LLM integration, RAG, n8n — so the scope you are quoted is scope he has shipped before.

Both founders have spent their careers in production software — twenty-five years between them, through governments, banks, ERP and venture-backed SaaS. On your project they are the two people who scope it, design it and stay accountable for it, from the first call to the last release.

Off the clock

There are real people behind the delivery plan.

The same colleagues, the same jokes and the same standard of work, year after year. Tap a clip for sound — this is the team you get on a call with.

Filmed by the team · plays silent until you ask
What makes us different
A working day, ours
Our project manager, on running projects
Trusted where it's hard
All work →
Public sector
Qatar Ministry of Foreign Affairs app · national epidemic control platform
Banks & fintech
RAKBANK onboarding · neobank QA · earn2trade · finamarksys
Startups & scale
AI social automation platform · an EdTech startup building an AI video tutor · a Silicon Valley VR surgical-training startup · a relationship-support platform led by a Caltech-based founder
Independently verified
public records — click through
NEXT STEP
Your roadmap, scoped and sequenced in writing — yours to keep after the first conversation.