Middle Fullstack Developer

Location: Warsaw, Poland
Format: Hybrid (Warsaw office)
Type of contract: B2B
Department: Technology
Seniority: Middle
English level: Intermediate+

🧠 About Us
At EPC Network, we’re not just a digital marketing company; we’re a platform for career transformation and personal growth. Our people-first approach shapes our corporate culture, fostering a team of passionate, smart, and energetic individuals who strive to grow professionally in an international, fast-paced environment.
We believe our Team is the foundation of our success, and now we’re looking for a Fullstack Developer (Node.js / React) to join our Technology team.

🎯 Job Description
As a Fullstack Developer (Node.js / React), you will be responsible for developing and maintaining both backend services and frontend interfaces for internal platforms and tools.
You will work on building stable APIs, implementing user interfaces, and ensuring seamless communication between frontend and backend systems.
In this role, you will collaborate closely with Business Analysts, Project Managers, DevOps engineers, and other developers, reporting directly to the Tech Lead.

🔧 Key Responsibilities

• Develop and maintain backend services using Node.js, NestJS, and TypeScript
• Design and implement REST APIs for internal platforms and integrations
• Build and maintain frontend applications using React
• Implement data fetching and server state management using TanStack Query
• Integrate frontend with backend APIs using Axios
• Implement CSV import and processing functionality using PapaParse
• Optimize application performance, scalability, and reliability
• Write unit and integration tests
• Refactor and support the existing codebase
• Collaborate with cross-functional teams to deliver high-quality solutions

📌 Requirements

• 3+ years of commercial experience in software development
• Strong experience with Node.js and TypeScript in production environments
• Practical experience with NestJS framework
• Experience building REST APIs and backend services
• Solid experience with React and modern frontend architecture
• Experience with TanStack Query for server state management
• Experience using Axios for API communication
• Experience with PapaParse for CSV parsing and processing on the frontend
• Understanding of component-based architecture and React hooks
• Experience working with relational databases (PostgreSQL or MySQL)
• Understanding of API design and client-server interaction
• Experience with Git and version control workflows
• Understanding of OOP, SOLID principles, and design patterns
• Experience writing unit and integration tests
• Ability to work with existing codebases and perform refactoring
• English level: Intermediate+

📌 Nice to Have

• Experience with Ant Design component library
• Experience with microservice architecture and asynchronous processing (RabbitMQ / Kafka)
• Experience with Redis or ElasticSearch
• Experience with CI/CD pipelines
• Experience with cloud platforms (GCP or Azure)
• Experience building high-load systems
• Experience using AI tools to accelerate development workflows (ChatGPT, Copilot, Cursor, AI-assisted debugging, code generation, test generation, documentation writing)

🏢 Working Conditions

• Hybrid work format in Warsaw
• Collaboration with experienced engineers, analysts, and product teams
• Opportunity to work on internal platforms and high-impact systems

🤝 What it means to be part of our Team
Your professional and personal development:
🙋 Multinational and intercultural experience
📚 Corporate library
💪 A world-class team to work with
🎓 Growth opportunities
💻 Cutting-edge frameworks and technologies
Well-being:
💰 Competitive salary
🎳 Engaging team activities
🎁 Bonuses according to the policy
🏖️ 21 paid vacation days & 14 paid sick leaves
🧘 Work-life balance
Working environment:
🏢 Cozy office in Warsaw
🥪 Coffee, tea, sweets, fruits, and more snacks
🧐 Adequate teammates

💌 Interested?
We’re looking for a developer who enjoys building reliable systems, working across the stack, and improving internal platforms used by multiple teams.

Please submit your CV in English.
Make sure to include your Telegram nickname in the cover letter.

Diamond, please, call out! We are waiting for you 💎