08/19/2026 updated
100 % available
Senior Full Stack Engineer
Zary, Poland
Only remote
Master of Software Engineering & Computer ScienceAbout me
Full-Stack Developer with 7+ years of experience building scalable, secure web and cloud applications. Skilled in backend architecture, responsive frontends, API integrations, automation workflows, and CI/CD to deliver efficient, maintainable solutions.
Java (Programming Language)JavaScriptAmazon Web ServicesAutomationDjangoPython (Programming Language)PostgreSQLMySQLNext.jsTypeScript.NET CoreReact.jsVue.jsBackendAngularJS
- Frontend: Angular, React, Next.js, Vue.js, TypeScript, HTML5, CSS3, Tailwind CSS, Material UI, RxJS, responsive UI, component architecture, dashboards
- Backend: Java, Spring Boot, Node.js, Python, Django, FastAPI, Express, PHP, Laravel, .NET, C#, API design, authentication, authorization, event-driven systems
- Databases: PostgreSQL, MySQL, schema design, migrations, indexing, query optimization, data modeling, reporting, analytics
- AI / LLM / Automation: Python, LLM APIs (OpenAI), prompt engineering, RAG, embeddings, AI agents, agentic workflows, MCP, workflow automation, n8n, Make.com, Zapier, webhooks
- Cloud / DevOps: AWS (EKS/ECS), Azure, Docker, Kubernetes, CI/CD, GitHub Actions, monitoring, performance optimization, cloud-native deployment
- Integrations / Security: OAuth2, SSO, RBAC, HR systems, e-signature APIs, SaaS integrations, secure API connectors, compliance-focused data handling
- Testing / Quality: Jest, Cypress, Pytest, NUnit, unit testing, integration testing, code review, maintainable architecture
Experience
Professional experience5 - 10 years
Freelancer since2016
Languages
EnglishFluent
Project history
- Lead development of cloud-based interactive platforms using React, Django, and AWS.
- Designed scalable RESTful APIs and optimized backend services for high-traffic applications.
- Implemented automation workflows using Python and n8n to streamline processes.
- Migrated legacy systems to modern cloud-native architectures improving performance by 40%.
- Mentored junior developers, enforcing code quality and best practices.
- Delivered full-stack solutions under tight deadlines, enhancing client satisfaction
- Built responsive web applications with React, Next.js, Django REST Framework, and C# backend microservices.
- Integrated complex third-party APIs, payment gateways, and authentication systems.
- Improved application performance using caching, indexing, and query optimization techniques.
- Designed modular frontend components, reducing development time by 30%.
- Led deployment automation using Docker, Kubernetes, and CI/CD pipelines.
- Collaborated with UX/UI designers to deliver visually appealing and user-friendly interfaces
- Developed multi-tenant web applications and dashboards for healthcare management.
- Implemented PostgreSQL and MySQL databases with advanced queries and reporting tools.
- Built automation pipelines to reduce manual data handling and increase efficiency.
- Created interactive frontend dashboards using React, Tailwind, and D3.js charts.
- Developed backend microservices improving system scalability and maintainability.
- Enhanced security protocols ensuring HIPAA-compliant data handling