Stop Wasting Time Start Building

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From Idea to Product — no fluff, just results.

About Me

How I Can Help?

Validate your startup idea — fast, honest, and before it costs you real money.

Design scalable architecture that won’t choke when users show up.

Audit your code like a hitman: silent, precise, and merciless.

Build and lead dev teams that actually deliver — no hand-holding required.

Integrate 3rd-party tools properly, without duct tape and regrets.

Act as your interim CTO — when you need execution, not just advice.

If it’s about startups or leading dev teams — and it’s not on the list — pitch me anyway.

Case Studies That Actually Prove Something

☁️ CRM Cloud Logistics SaaS

Developed and scaled a full-featured SaaS CRM for logistics. Optimized for efficiency, real-time tracking, and automation — used by major clients to streamline operations and boost delivery performance.

🛍️ London Retail Platform (350+ stores)

Built in 9 months from scratch — a full system for multi-store ordering, cart optimization, pickup & delivery. Improved UX so well it boosted sales without changing marketing spend.

NDA

📈 Investor Analytics Startup

Developed a POC in 2 months, led to a 6-month MVP contract. Helped the founders go from idea to execution with the right architecture and dev approach.

NDA

🚚 Freight Taxi Marketplace Startup

Launched the first marketplace for on-demand freight taxis — from concept to deployment. Handled everything from system design to team leadership, building a scalable logistics platform from the ground up.

🧮 Real-Time Finance Tool

Architected a platform to calculate unit economics live using EnigmaJS. No dashboards full of lies. Just math. Real-time.

NDA

🧼 Legacy Refactor → Instant Wins

Refactored an entire legacy system solo in 3 months: Cut bundle size by 10x. Load speed went from 5s → 0.5s. Result: signed 4 new contracts, brought in new devs, doubled delivery pace.

NDA

🧬 Medical SaaS Optimization

Integrated a medical device with offline mode + secure cloud sync. Then optimized infra for zero-downtime deployment in production. Performance + compliance = peace of mind.

NDA

👨‍🏫 Team Scaling & Mentorship

Helped founders scale technical teams. Mentored devs, improved handoff between design & dev, and kept PMs sane.

NDA

Testimonials

Ihor H.

CoFounder at Rainbinary

Kostiantyn brings rare clarity to complex challenges. He leads with confidence, solves the hard technical problems others avoid, and delivers clean, scalable solutions. A sharp thinker, strong communicator, and someone you want in your corner if quality actually matters.

Vitalii K.

Technical Product Owner

Working with Konstantin was effortless and impactful. He combines deep technical expertise with clear communication and a hands-on approach. Whether solving complex problems or guiding implementation, he delivers fast — and makes it look easy.

Yuriy H.

Lead Backend

Konstantin is a rare mix of tech expertise and leadership. He solves hard problems, supports his team, and sees projects through with precision. With 10+ years of experience and a sharp sense of ownership, he leads with clarity — and somehow keeps morale high while doing it.

Sasha P.

Head of Product Design

Kostiantyn is proactive, reliable, and sharp across multiple domains. He brings fresh ideas, deep expertise, and a collaborative mindset — exactly the kind of consultant you want when stakes are high and solutions matter.