I build simple tools that save time.
Flutter developer & product builder. Offline-first apps, automation, PDF/QR, integrations. Focus on speed and clean UX.
Services
I help businesses and individuals with mobile apps, AI visibility, and web security.
Custom E-commerce (Next.js + Supabase) – fast storefront, custom admin, built to scale
I deliver a modern custom e-commerce solution built on Next.js 16 and Supabase (PostgreSQL + Auth + RLS). You get a fast storefront (mobile UX, SEO, Core Web Vitals) and a custom admin for daily operations (products, orders, customers, discounts, content, settings).
Android App Development (MVP to Production)
I design and build modern Android apps from idea to release. I can deliver a fast MVP or a production-grade app, including API integrations, user authentication, push notifications, analytics, and (if needed) a lightweight admin/backend. You’ll get regular builds for review and a clear roadmap for the next iterations.
SEO + GEO + AI Audits for Websites & E-commerce (performance, visibility, conversion)
I run technical SEO and performance/UX audits for websites and e-commerce stores, and provide GEO (Generative Engine Optimization) recommendations — improving structure and content to perform better in generative search and AI answers.
Selected Work
Projects I'm currently working on.
AI Audit Tool
Desktop tool for auditing website AI-readiness. Scans pages, evaluates 6 pillars (indexability, schema, DOM semantics, content, media, operational signals) and generates PDF reports with actionable recommendations.
Guardrails – Policy-as-Code Security Scanner
Guardrails is an automated security scanner for GitHub and local environments (CLI) built on the "Policy-as-Code" principle. The tool automatically analyzes every Pull Request (PR) to detect leaked secrets, known vulnerabilities in dependencies, dangerous code patterns, and missing authentication before the code is merged. As the sole developer of this project, I engineered the custom scanning engine, published the CLI tool on npm, and built the native GitHub App integration.
Web Firewall
Privacy-first Chrome extension for safer browsing — hides low-quality content, detects scam/dark pattern UI, and warns about prompt injection attacks targeting AI agents. Runs entirely locally.
Skills
Technologies and approaches I use.
Flutter (Android/iOS)
Native performance, one codebase for both platforms.
Offline-first (SQLite/Drift)
Apps work even without internet.
PDF generation, QR payments
Invoices, documents, payment QR codes.
API Integration (ARES etc.)
Connection to external services and registries.
Rapid prototyping
From idea to working MVP in days.
Speed-focused UX
Simple interface, minimum clicks.
About
I'm a solo developer focused on practical tools. I enjoy solving real problems and iterating with users. I believe the best software comes from listening to the people who use it. I build things that work offline, are fast, and stay out of the way.
Contact
Have an idea or question? Get in touch.
Or email directly at
ondys.dev@gmail.comSupport
If my projects help you, consider supporting me. It helps with development and running costs.
Support