Kuba
Founder & engineer
I help founders and businesses turn ideas and complex problems into reliable software, from the first technical decisions to launch, and everything after it.
01 Prop-firm comparison site · 2025–2026
Move across the image to look through the productTap a number to look through the product
I joined an established prop-firm comparison site to help grow it organically. I introduced SEO improvements, trading tools and a Chrome coupon extension, alongside clearer layouts and richer data. Organic traffic grew by around 40% in about two months after I joined.
My roleSole developer; technical and product partner
Read the case study
02 Learning platform · 2024
I built The Vault, an in-house learning platform, from scratch as its only developer. Courses, videos and trading tools sit alongside interactive chart exercises, progression-based unlocks, payments and paid coaching. I also built the automated pipeline that imports and processes videos from Discord.
My roleSole developer: platform, video pipeline, payments and infrastructure
Read the case study
03 AI course assistant · Late 2024–2025
I built The Vault's AI course assistant as the sole developer, so students can ask questions across the course videos and follow direct links to the relevant video and timestamp. It runs as its own Python service. Development ran from late 2024 through 2025, followed by maintenance.
04 Cross-platform app · 2024
My work started with the Windows app. I went on to build the macOS, iOS and Android apps, develop the backend and handle store releases. Across all four platforms, the apps allowed users to set trading hours and block trading apps and websites outside those hours.
My roleDeveloper: Windows, macOS, iOS and Android apps, backend and store releases
Read the case studyWhat I do
01
For when an idea, a process or a product needs to become dependable software that people pay for, rely on and use every day.
Custom applications, SaaS platforms, websites, mobile and desktop apps, backend infrastructure and third-party integrations.
In practice: PropFirmTrader, The Vault, TradeBlocker
02
For when AI should do real work inside your product or business, grounded in your own data and dependable enough to build on.
AI-powered features, assistants, retrieval-augmented (RAG) systems, automation and bespoke data workflows.
In practice: AI RAG Agent
03
For when you need someone senior to own the technical side (architecture, priorities and quality) for the long run, not a single sprint.
Product architecture, technical planning, audits, engineering improvements, continuous development and long-term support.
In practice: PropFirmTrader
How I work
Starting from
We work out who it's for, what has to be true for it to succeed, and the smallest version worth building.
Your part
Your idea, your users and your constraints.
You leave with
A written brief we both agree on.
I make the early technical calls about architecture, stack, what to build and what to buy, and explain the trade-offs in plain English.
Your part
Decisions on scope and priority.
You leave with
A technical plan, an estimate and a first milestone.
Short cycles, with working software at the end of each one. You see progress, not status reports.
Your part
Feedback on every release.
You leave with
Working software at the end of every cycle.
Deployment, monitoring, payments and analytics are the unglamorous details that decide whether launch day is a quiet one.
Your part
Sign-off, and telling the world.
You leave with
A live product, documented and handed over properly.
Real usage shows what matters next: new features, performance work, or deliberately nothing at all.
Your part
Priorities, as they change.
You leave with
A product that keeps getting better, not older.
About
I build SaaS platforms, web applications, desktop and mobile software, AI systems and automation. I stay involved through the whole lifecycle: planning and architecture, development, deployment, and the improvements that follow.
Kubuilt is how I work with clients: directly, with one person accountable for the technology from the first conversation onwards.
2021–2023
Combined study with building automation for online sneaker releases.
July 2023–January 2025
Part-time role, with experience in reporting and analysis.
The most expensive mistakes happen before anyone writes a line. I'd rather question an assumption in week one than build around it for a year.
Every significant technical choice comes with the reasoning and the trade-offs, in plain English and written down.
Software is never finished. I build things to be maintained, and I'm around to maintain them.
Experience with
Next.js / React / TypeScript / Firebase / Flutter / Python / Stripe / APIs / RAG
Contact
