Strong Middle/Senior Full Stack Developer (Java+Angular)
Sigma Software15 hours ago
Remote, Poland or Warsaw, PolandMid Level / Senior
Responsibilities
- Design, develop, and maintain scalable full-stack solutions using Java, Spring, and Angular.
- Develop and support complex business logic for advertising campaign management.
- Participate in architecture discussions and contribute to technical solution design.
- Build reliable, maintainable, and high-performance enterprise applications.
- Improve system scalability, reliability, and overall platform performance.
- Integrate with external advertising and media-related services.
- Write clean, maintainable, and well-tested code.
- Collaborate with developers, architects, QA engineers, and project managers.
- Own technical challenges and proactively drive solutions.
- Contribute to development-process and engineering-standard improvements.
Requirements
- 5+ years of commercial software development experience.
- Strong hands-on experience with Java and the Spring Framework.
- Strong practical experience with Angular.
- Experience building scalable, enterprise-level applications.
- Experience with AWS cloud services.
- Understanding of software engineering principles and system design.
- Experience with integrations and REST APIs.
- Ability to work independently and proactively solve technical challenges.
- Strong analytical, problem-solving, communication, and collaboration skills.
- Experience writing maintainable and testable code.
- Upper-Intermediate or higher English is a plus.
- AI-native development experience is a plus.
- Experience with AI-powered development tools such as Claude or Codex is a plus.
- Experience with Jenkins and Terraform is a plus.
- Experience with complex enterprise platforms is a plus.
- Experience in AdTech, MarTech, or media-related domains is a plus.
Categories
About Sigma Software
Sigma Software is a London-headquartered, privately held IT consultancy that designs and builds custom software for startups and enterprises. The company provides end-to-end services—engineering, web and mobile development, .NET/Java platforms, AR/VR, and UI/UX —delivered via outsourcing, managed teams, and consulting. Founded in 2002, it supports long-term product development and modernization projects across multiple industries for global clients.