B2B leave-management SaaS for the Serbian market. Live in production.
Sole engineer and founder: took a B2B SaaS from empty repository to a paying customer of ~240 employees in three months, and run it in production with Sentry monitoring.
Closed that customer myself, running discovery, scoping and pricing, then built what I sold: 80 migrations and 44 Playwright end-to-end specs behind it.
Made cross-tenant data leaks structurally impossible by enforcing isolation in PostgreSQL Row Level Security rather than in application code.
Ground-up rebuild of four legacy codebases into one three-tier platform (Mezzio API, Slim middleware, Nuxt 4 frontend) behind a payments business. Upstream fix contributed to DDEV (ddev/ddev#6809).
Primary author and architect of the ground-up rebuild replacing four legacy codebases with one platform, owning two thirds of all commits across seven repositories in a team of six.
Put five other developers on AI-assisted delivery: packaged the workflow as an installable Claude Code plugin with 14 skills, 4 MCP servers, 43 tools and destructive-command guardrails.
Built a code-first pipeline turning PHP API attributes into a versioned, auto-published TypeScript SDK, so contract drift became a compile error, not a production bug.
Cut a store listing page from 23.3 seconds to 2.3 by finding a database view hiding 32 joins across 3.9M rows, and made the access-control query 660 times faster. No new infrastructure.
Turned scattered wiki pages into a 138-page portal (sole author), mapping ~820 legacy actions across four codebases to their replacements as one migration reference.
Raised the team's baseline through the architecture, not persuasion: 7 custom static-analysis rules, 41 ADRs and guidelines, and 6 CI workflows enforcing the standard on every PR.
Built a retail client’s headless e-commerce storefront (VueStorefront + Magento 2) and maintained multi-store Magento 2 websites across NL/BE/DE markets.
Mentored 7 junior developers through a structured curriculum; 4 progressed to shipping on real client projects.
Contributed an upstream fix to Vue Storefront (vuestorefront/vue-storefront#4533).