Senior/Lead Full Stack Java Developer

Upvanta sp. z o.o.

Warsaw, Poland • 35m ago • Remote

Senior

Remote

1,200 - 1,500 PLN/yr

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Quick Facts

  • Role: Senior/Lead Full Stack Java Developer

Description

Senior/Lead Full Stack Java Developer to support development and modernization of key projects for European institutions. Design and build scalable full-stack applications using Java and Angular, create secure backend services and modern web applications, and integrate distributed systems via APIs. Implement database-driven functionality with performance optimization and deploy solutions in cloud environments using CI/CD, Docker, and Kubernetes.

Responsibilities

  • Design and develop scalable full-stack applications using Java and Angular

  • Build and maintain backend services and modern web applications

  • Design and implement secure APIs and integrations between distributed systems

  • Implement database-backed features and optimize application performance

  • Ensure code quality, security, testability, and performance

  • Deploy applications in cloud environments with CI/CD, Docker, and Kubernetes

  • Develop multilingual applications and reusable Angular libraries

  • Analyze and solve complex technical problems

  • Create technical documentation and collaborate with international business and technical teams

Requirements

  • Master’s degree or equivalent (EQF Level 7)

  • 15+ years of IT and software development experience

  • 15+ years practical experience with: Java, SQL, Spring Boot, Hibernate, database design, query and performance optimization, PostgreSQL or Oracle or MongoDB

  • 10+ years experience with Git (GitFlow or trunk-based development)

  • Knowledge of SVN

  • 5+ years experience with: Domain-Driven Design (DDD), Angular, JavaScript, HTML, CSS

  • 4+ years experience with Apache Kafka and distributed systems integration

  • 2+ years experience with systems handling grants/public funds at scale

  • 2+ years experience with PM2-Agile methodology

  • Experience building multilingual applications supporting 10+ language versions

  • Experience building Angular component libraries (e.g., eUI)

  • Very good knowledge of: REST API, OpenAPI/Swagger, OAuth 2.0, OpenID Connect, JWT, Docker, Kubernetes, CI/CD, AWS or Azure

  • English C1+

Benefits

  • Opportunity to work on strategic projects for European institutions

  • Work on large-scale systems with social impact

  • International environment and collaboration with experts from multiple countries

  • Access to modern tech stack and cloud-native solutions

  • Long-term project with real influence on product development

  • Growth opportunities in architecture, systems integration, and cloud technologies

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