MVP for startups & SMBs
We help you validate your idea fast with a lean, production-ready minimum viable product — so you can test the market without burning budget.
Affordable website and mobile app development
Get a professional website or mobile app without overpaying. ExStack helps companies launch digital products faster while balancing quality, functionality, and budget.
About Us
Your development partner for web and mobile
For over 7 years, ExStack has been building websites and mobile apps for startups and growing businesses — turning ideas into products that work.
Who we serve
Fast delivery & time-to-market
Iterative sprints, clear milestones, and dedicated teams mean your product reaches users sooner — without sacrificing quality.
Web & mobile under one roof
One partner for your entire digital product: corporate websites, web apps, and cross-platform mobile — consistent quality and a single point of contact.
Growing businesses
When your product outgrows its first version, we help you scale — new features, better performance, and architecture that keeps pace with your business.
Digital product upgrades
Outdated website or app slowing you down? We modernize existing products with current tech stacks, improved UX, and a clear migration path.
Founders & business owners
No in-house dev team? We speak business, not just code — translating your goals into a product roadmap and delivering it end to end.
Post-launch care
Already live but need ongoing help? Maintenance, updates, performance tuning, and technical consulting to keep your product running smoothly.
E-commerce & online businesses
Selling online or running a digital service? We build storefronts, booking flows, and custom web apps tailored to how your business actually works.
AI-Powered Delivery
Smarter development, human expertise at the core
We integrate AI across planning, coding, and review — accelerating delivery without cutting corners. Your product gets to market faster, with the quality and judgment only experienced engineers provide.
Security by design
AI-generated code never ships unchecked. Every output goes through human review, automated security scans, and dependency audits — so your data, users, and business stay protected. We follow secure coding practices and never expose sensitive information to external models.
Built for today, ready for tomorrow
Markets move fast — products that lag behind lose users. AI lets us adopt the latest frameworks, patterns, and tooling without slowing down. You get a modern stack, up-to-date architecture, and features that feel native to 2026 — not legacy from day one.
Planning
AI helps us break down requirements, estimate scope, and spot gaps early — so every sprint starts with a clear, realistic roadmap aligned to your business goals.
Development
From boilerplate to complex logic, AI accelerates implementation while our engineers architect, review, and refine every line — shipping features in less time without technical debt.
Quality delivery
Automated checks, AI-assisted code review, and human QA work together — catching issues before release and delivering polished features your users can rely on.
Technologies
Tools & services we build with
These are the tools growing businesses choose right now — and the stack we use to deliver modern web and mobile products.
- React
- Next.js
- Figma
- React Native
- Expo
- Node.js
- Python
- Android Studio
- Xcode
- App Store
- Express
- MongoDB
- Cloude AI
- Cursor
- Google Cloud
- Firebase
- AWS
- Azure
- GitHub
- TypeScript
- GraphQL
- WebSockets
- Docker
- Kubernetes
- CI/CD
- Cloud Functions
- CDN
- Monitoring & Analytics
- OpenAI API
- Claude API
- AI Integrations
- AI Agents
- Workflow Automation
- Postman
Core Team
The people behind your product
Our core team of specialists who design, build, and ship your product.
Bogdan Pechenyk
Co-founder & CTO
Turns ambitious ideas into scalable architecture. Keeps one eye on the roadmap and the other on the horizon.
Hobby: Weekend road trips & tinkering with side projects
Sergey Stakhura
Co-founder & Architect
The engineer who reads the docs so you don't have to. Calm under pressure, sharp in code review.
Hobby: Mountain hikes & landscape photography
Sofia Shvets
HR & People Partner
Builds teams where people actually want to show up on Monday. Culture, growth, and the human side of tech.
Hobby: Urban rooftop gardens & discovering hidden coffee spots
Anastasia Voronyak
Project Manager
Keeps sprints on track and stakeholders aligned — with a smile that survives every standup.
Hobby: Stargazing & hunting down the best dinner spots
Daria Svyrydenko
Designer
Makes interfaces feel obvious before users even think about clicking. Pixel-perfect, user-first.
Hobby: Museum hopping & collecting design inspiration
Ruslan Sidorenko
Fullstack Developer
Ships features from database to button — and debugs the whole stack without breaking a sweat.
Hobby: Ski slopes in winter & fishing when the ice melts
Order Service
Start your project consultation
Share a few details about your product and goals — the ExStack team will review your inquiry and get back to you within one business day.