Our Portfolio - Open Source

Explore our Open Source work. Each project shows how we turn a practical need into a dependable product with clear ownership from discovery through delivery.

AI accelerates our execution, senior engineers own the architectural decisions, and every project is backed by our lifetime bug-fixing guarantee.

All AI Automation Web App Mobile App Blockchain Website

Open Source Case Studies

7 projects found

Clear category filter ×

Internal Product

Zgidno-Vidpovidno

Two-way Ukrainian AI translator with structured output and a free-tier Cloudflare backend for secure generation, fallback AI, and shared snapshots.

Zgidno-Vidpovidno demonstrates a transparent two-way AI workflow for Ukrainian text. Its small Cloudflare backend protects provider keys, supplies an AI fallback, and stores immutable shared results without requiring a conventional application server.

Explore Case Study

Internal Product

Web

React Support Ukraine Banner

React Support Ukraine Banner is a lightweight component that adds a UNITED24 support banner to any website.

React Support Ukraine Banner is a small, focused open-source component that makes it easy to show solidarity with Ukraine. It reflects Vasilkoff Ltd's commitment to open source and social impact by helping websites display a UNITED24 link in a clear, accessible banner.

Explore Case Study

Internal Product

Web3

SMRT16

SMRT16 is an open-source Polygon DApp with automated referral earnings, delivered with a quality-first, accountable workflow.

SMRT16 demonstrates our expertise in Web3 development, Solidity smart contracts, and decentralized application architecture. Built as a fully autonomous, open-source DApp for multi-level referral programs on the Polygon blockchain, it ensures instant, secure, and transparent rewards distribution (up to 93.75% of transactions). This experience is ideal for clients needing decentralized affiliate systems, blockchain-powered loyalty programs, or advanced crypto integrations. We can design and deploy secure smart contracts with AI-powered internal/external audits, and integrate decentralized or centralized apps with SMRT16 logic, with accountable delivery from start to launch.

Explore Case Study

Client Case Study

Mobile App

Easy VPN Free

Easy VPN Free is a 100% free, open-source Android app using VPN Gate, offering secure, censorship-resistant access without tracking.

Easy VPN Free exemplifies our expertise in developing open-source, privacy-focused mobile applications. As an Android VPN app with a publicly available codebase, it showcases our commitment to ethical software development and transparent practices. This experience is crucial for startups and MVPs, demonstrating how we leverage stable, battle-tested open-source components to accelerate development, reduce costs, and deliver scalable, secure solutions with faster time-to-market.

Explore Case Study

Client Case Study

URL Shortener

2ul.top

2ul.top is an open-source URL shortening service developed by Vasilkoff Ltd. The project showcases DevOps best practices and offers both free URL shortening services.

2ul.top showcases our expertise in developing scalable, high-performance web applications using modern NextJS and NodeJS stacks. Our focus on rigorous DevOps best practices (including CI/CD and Infrastructure as Code) ensures efficient development cycles and rapid deployment. This experience is perfectly suited for clients building SaaS platforms, high-traffic web services, and custom APIs requiring operational efficiency and resilience. We deliver robust solutions designed for long-term growth and optimized time-to-market.

Explore Case Study

Internal Product

Mobile App

Bella Chess

Bella Chess is an open-source chess product spanning Flutter mobile and Next.js web, combining AI training, etude challenges, and NFT collectibles.

Bella Chess proves we can combine cross-platform product delivery, AI-assisted gameplay, and Web3 mechanics inside one coherent user experience. The same experience applies to GameFi, education products, collectibles platforms, and ambitious apps that need mobile, web, and tokenized systems to work together.

Explore Case Study

Client Case Study

Crypto

GARANTEX EXCHANGE

Garantex Exchange is a professional cryptocurrency exchange platform with a website and native iOS and Android apps.

Garantex Exchange demonstrates our ability to rapidly deploy scalable and secure crypto exchanges by leveraging and customizing open-source frameworks like Peatio. Vasilkoff Ltd specialised in comprehensive Fintech solutions with multi-platform access (Web, iOS, Android), ensuring advanced trading features and robust security. This expertise is ideal for clients seeking quick, cost-effective solutions for building professional trading platforms that meet rigorous security standards and support high transaction volumes.

Explore Case Study

What Every Delivery Shares

Beyond frameworks and tools, every Vasilkoff project is defined by clear engineering standards and measurable responsibility.

AI-Accelerated Speed

We leverage custom local AI models to automate boilerplate code, speeding up delivery timelines to weeks instead of months.

Senior Human Ownership

AI generates code, but senior engineers design the architecture, conduct security reviews, and own the final execution.

Lifetime Bug Guarantee

We stand behind our engineering. Every product delivered includes a lifetime guarantee for free bug-fixing.

Have a product idea or system challenge?

Start with an instant proposal or talk with our engineering team to scope your project risks and timeline.

Discuss Your Project Talk to Our AI Intake