Denys M.

⚡ SaaS & AI Developer | Laravel + Claude API specialist 🧠 5+ Years of Production Experience 🚀 Shipping AI-integrated web platforms end-to-end I'm a Full-Stack Developer who builds SaaS backends and AI-powered features with Laravel, Symfony, Next.js, and the Claude API. If you're building a Claude- or GPT-powered assistant, a document-processing pipeline, a multi-tenant SaaS platform, or any web app that has to ship fast and hold up in production — I can help you bring it to life. 🏆 Rocket Coding (Healthcare SaaS prototype) Built a Laravel 11 backend for AI-powered clinical documentation — schema- validated Claude API output, retry-with-correction logic, OpenAI fallback, queue-based processing under Supervisor, and immutable audit logging (HIPAA/OIG-ready). Dockerized, CI-tested. Full repo and architecture walkthrough available in my Portfolio below. 🧠 AI & LLM Integration ➤ Claude API (Anthropic Messages API) — structured output, schema validation ➤ OpenAI API — chat completions, response_format JSON mode ➤ Prompt engineering — system prompts, corrective-retry prompts ➤ Schema validation (opis/json-schema) with retry-on-violation ➤ Provider-agnostic architecture (Claude primary, OpenAI fallback) ➤ Queue-based orchestration (Laravel queues, Redis, Supervisor) ➤ Token & cost tracking per request for billing/analytics ➤ Immutable audit logging for compliance-grade pipelines 🛠 Tech Stack (End-to-End) Backend: Laravel, Symfony, PHP 8.2+, Node.js, REST + GraphQL APIs Frontend: React, Next.js, Vue, TypeScript, Tailwind CSS Databases: PostgreSQL, MySQL, Redis, MongoDB Infra & DevOps: Docker, docker-compose, Nginx, GitHub Actions CI, Vercel AI Integration: Claude API, OpenAI API, opis/json-schema, prompt engineering 3rd Party: Stripe, Meta Graph API, Google Merchant Center, AWS S3 ✔ What sets me apart ➤ Test-backed code, not tutorial copy-paste — every service I ship has feature tests covering happy-path AND failure-mode behavior. ➤ Clean service-oriented architecture — thin controllers, fat services, dependency injection done properly. ➤ Daily Claude Code user — if your workflow involves AI-paired development, we'll slot in without friction. ➤ Transparent, low-ceremony communication — async by default, sync when it matters, never radio silent. 💬 Quick context Rebuilding my Upwork profile after years of direct-client work. Happy to share portfolio + code samples, walk through architecture on a call, or start with a small paid task so you can see how I work before committing. Looking for a developer who ships clean, AI-aware backends that won't need a rewrite in six months? I'd love to hear about your project. ─────────────────────────────────────────────── Keywords (for profile visibility): Laravel Developer | Senior Laravel Developer | PHP Developer | Symfony Developer | Claude API | Anthropic | OpenAI API | LLM Integration | AI Integration | Prompt Engineering | SaaS Developer | SaaS Laravel | REST API | API Development | PostgreSQL | MySQL | Redis | Docker | Docker Compose | Next.js Developer | React Developer | TypeScript | Tailwind CSS | Node.js | Full Stack Developer | Backend Developer | Microservices | Multi-Tenant SaaS | Queue Workers | Supervisor | GitHub Actions | CI/CD | Vercel | Web Application Development