Sigma Software
Strong Middle/Senior Full Stack Developer (Java+Angular)
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• Design, develop, and maintain scalable Full Stack solutions using Java, Spring, and Angular • Develop and support complex business logic related to 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 following engineering best practices • Collaborate with developers, Architects, QA engineers, and Project Managers • Take ownership of technical challenges and proactively drive solutions • Contribute to continuous improvement of development processes and engineering standards • 5+ years of commercial software development experience • Strong hands-on experience with Java and Spring Framework • Strong practical experience with Angular • Experience building scalable enterprise-level applications • Experience with AWS cloud services• Good understanding of software engineering principles and system design • Experience working with REST APIs and integrations • Ability to work independently and proactively solve technical challenges • Strong analytical and problem-solving skills • Experience writing maintainable and testable code • Good communication and collaboration skills • Upper-Intermediate or higher level of English WILL BE A PLUS• AI-native development experience• Experience using AI-powered development tools such as Claude or Codex • Experience with Jenkins• Experience with Terraform• Experience working with complex enterprise platforms • Experience in AdTech, MarTech, or media-related domains PERSONAL PROFILE• Proactive and ownership-driven mindset • Strong problem-solving orientation• Ability to work independently in a distributed team environment • Focus on quality and continuous improvement • Willingness to participate in technical discussions and contribute ideas • Strong communication and collaboration skills Our Customer is an international company operating in the AdTech industry.