Where ideas become software.

Gregory
Barański.

I turn ideas into mobile apps.

Share your idea Schedule a call
Portrait of Gregory Barański Warsaw, Poland
6+
Years experience
5×
Award winner
Why one person?

One person. Network of leverage.

Software houses optimise for billable hours. I optimise for what shipped this week — and the year that comes after.

Single decision point

One person on the call. One person at the keyboard. Decisions in minutes, not three sprints — and one line of accountability when something breaks.

Shipping over documentation

First line of code in week one. No six-week Figma phase. No twelve-person discovery. You see a working feature, not a roadmap diagram.

AI is the lever

Claude and Claude Code as full build partners — long-horizon autonomous tasks, not just autocomplete. One person ships what eight used to.

Bus factor solved

I work with a trusted network of developers I've onboarded before. Continuity in a week, not a quarter — single decision point doesn't mean single point of failure.

What I build

Software
I build.

End-to-end ownership across mobile, web, and the systems that glue them together. One person, one line of accountability.

Mobile Apps
Your idea on iOS and Android. From wireframes to App Store. One codebase, native polish where it matters.
Web Apps
Browser-first products that scale — from internal dashboards to multi-tenant SaaS. Intuitive UX, secure by default, integrated with whatever you already run.
IT Systems & Automation
The glue between systems. Webhooks, document parsing, AI workflows in production. Built to be operated, not babysat.
Architecture
Scalable foundations before features. >99.9% uptime, observability baked in, no vendor lock-in. Decisions that don't get rewritten in year two.
UI/UX Design
Specialist designers I work with — or yours, if you have them. Design and code ship in parallel. Figma is hypothesis, code is reality.
Selected work

Portfolio.

Casting Studio
01 / 04 — flagship
Casting Studio

An AI-first, chat-first casting platform — built end-to-end alongside the founder, as solo CTO and technical co-founder. Conversation replaces forms, agents do the heavy lifting, and the entire stack is declarative and shipped through Claude + Claude Code from day one. Live on iOS, Android, and web.

SaaSAI-firstChat-firstAgenticNix / NixOSFounder partnership
wheretopark.app
02 / 04
wheretopark.app

An AI-powered parking assistant helping drivers in crowded cities. Represented Poland at Regeneron ISEF in Los Angeles.

Mobile AppAIiOSAndroidWeb
EnVest
03 / 04
EnVest

A social investing platform built for a community of American investors.

Mobile AppiOSAndroidFintech
BusyBee
04 / 04
BusyBee

A recruitment platform automating sourcing and onboarding for hospitality teams.

Web AppRecruitmentAutomationHR Tech
Selected recognition

Industry
Recognition.

Independent validation of shipped work — selected from broader fields by international juries and academic institutions.

2024
Regeneron ISEF — Los Angeles
wheretopark.app selected to represent Poland at the world's largest international engineering and science competition.
International
2024
Gold Medal for Innovation — IWIS
Top distinction for wheretopark.app at the International Warsaw Invention Show, juried across 30+ countries.
Gold Medal
2023
Explory — STEM Laureate
Recognised among Poland's most promising applied-technology projects.
STEM
2023
1st Place — Geoinformatics, Warsaw University of Technology
National competition recognising technical excellence in geospatial systems engineering.
1st Place
2023
Innovator Award — NOT Federation
Issued by the Polish Federation of Engineering Associations for technical contribution to urban mobility.
NOT Award
How it works

Process.

First call is not about code. It's about whether your idea has the answers it needs to start shipping next week.

01
Discovery
3 questions
First call costs nothing. Three questions about your business. If you have answers — we start next week. If you don't — I help you find them. No invoice.
02
Week 1
Architecture
The few decisions that don't get rewritten in year two: stack, data model, deploy target. Made before week one ends.
03
Week 2+
Ship in production
Real users see real features from week two. Design and code run in parallel. Figma is hypothesis, code is reality.
04
Ongoing
Iterate
Weekly demos. Continuous feedback. We measure what shipped, not points planned.

Sound good?

Schedule a call ↗
Engineering

How I think.

Tools change every two years. Mindset doesn't. In 2026 the engineering mind behind your product matters more than the languages on the resume.

AI as a build partner
  • Claude and Claude Code as full collaborators, not autocomplete
  • Long-horizon autonomous tasks
  • Spec-driven, agent-friendly codebases
  • Prompt and tool design as a first-class concern
  • PR review and integration through agents
Boring on purpose
  • One service, not microservices
  • Self-hosted, not SaaS lock-in
  • Reproducible from a single config
  • Infrastructure as code, version-controlled
  • Decisions that don't get rewritten in year two
Shipping is the work
  • Code in production from week two
  • Tests on practically every user flow
  • Every euro stays with the founder, not with AWS
  • Weekly demos, not quarterly roadmaps
  • Done over documented