09/01/2026 updated
100 % available
Senior Full-Stack & Product Engineer | AI-Augmented Development
Brasov, Romania
Only remote
Electrical Engineering and Computer Science, Transilvania University of BrasovAI AgentsRAGGitHub ActionsTailwind CSSOpenAIFlutterHTMLJavaScriptCascading Style Sheets (CSS)Continuous IntegrationDjangoGitHubLaravelPostgreSQLMongoDB
I am a Senior Full-Stack and Product Engineer with approximately 6.5 years of experience delivering web, mobile and cross-platform products from discovery and architecture to production deployment and ongoing operations.
I have worked with React, TypeScript and Node.js since the beginning of my freelance career, alongside PHP, Laravel, WordPress and WooCommerce. Over time, my work evolved toward increasingly complex SaaS products, real-time platforms, mobile applications, AI ecosystems and AI-enabled products.
I have delivered 50+ projects across SaaS, e-commerce, healthcare, finance, ERP, logistics, automotive, agriculture and internal business platforms. My work typically includes frontend and backend implementation, data modelling, API design, authentication, external integrations, DevOps, production monitoring and direct communication with product stakeholders.
My applied AI experience includes:
• RAG and vector-store workflows over technical documentation
• OpenAI and Gemini API integrations
• Multimodal and image-analysis workflows
• Structured-output validation and fallback model strategies
• Prompt engineering for domain-specific products
• AI conversation state, retrieval context and background processing
• Multi-agent development and task orchestration
I use Cursor as my primary local development environment and have also worked with Claude and GitHub Copilot. My workflow includes CodeGraph MCP and custom AI orchestration frameworks with coordinators, specialised sub-agents, prompt transformation, task delegation and JSON/Markdown-based prompt and execution history.
I also have experience integrating Stripe, Netopia, EuPlătesc, RevenueCat, SmartBill, e-Invoice/iApp, Nexus ERP, MT940, Firebase, Google Maps and other REST, webhook, fiscal and payment services.
Core stack:
React, Next.js, TypeScript, Node.js, Express.js, Fastify, NestJS, Laravel, PostgreSQL, MySQL, Redis, Docker, GitHub Actions, Azure, Hetzner, WebSockets and REST/GraphQL APIs.
Experience
Professional experience5 - 10 years
Freelancer since2020
Languages
EnglishFluent
Project history
Senior Full-Stack / Product Engineer delivering end-to-end web, mobile and cross-platform products for startups, product companies and consulting partners. Delivered 50+ projects across SaaS, ERP, e-commerce, healthcare, finance, logistics, automotive and mobile products. Responsible for the full lifecycle including requirements, solution design, data modelling, frontend/backend implementation, integrations, code review, deployment, monitoring and iterative maintenance.
• Delivered 50+ projects across SaaS, ERP, e-commerce, healthcare, finance, logistics, automotive and mobile products — from discovery and architecture to deployment and production support.
• Own the full lifecycle: requirements, solution design, data modelling, frontend/backend implementation, integrations, code review, deployment, monitoring and iterative maintenance.
• Backend: TypeScript, Node.js, Express.js, NestJS, Fastify, Laravel and Django; REST/GraphQL APIs, authentication, validation, queues, cron jobs and background processing.
• Frontend & Mobile: React, Next.js, Vue, SvelteKit, Astro, React Native/Expo, Flutter and Capacitor.
• Data: PostgreSQL, MySQL/MariaDB, MongoDB, Redis and Elasticsearch; Prisma, Sequelize and Eloquent.
• Applied AI: OpenAI/Gemini integrations, RAG/vector-store workflows, multimodal image analysis, prompt engineering, structured-output validation and LLM orchestration.
• Real-time systems: WebSockets, Socket.IO, Laravel Reverb/Echo, notifications, live tracking and operational dashboards.
• Integrations: Stripe, RevenueCat, Netopia, EuPlătesc, SmartBill, e-Invoice/iApp, Nexus ERP, Firebase, Google Maps and third-party REST/webhook APIs.
• DevOps & production: Docker, GitHub Actions, CI/CD, NGINX, PM2, Azure, Hetzner, AWS services, SSL/TLS, logging and backups.
• Work directly with founders and domain stakeholders, translating business workflows into maintainable product architecture and production systems.