Senior Java Full Stack Developer – Tieto Tech Consulting (m/f/d) at Tietoevry1

Tieto Tech Consulting, is looking for a highly skilled and motivated Senior Java Full Stack Developer, a professional who will join a project within a Telecom Team for our respectful client BICS. Join the team of our customer BICS – a global telecommunication enabler with a physical network stretching through the globe! Grow your expertise through interacting with A-level mobile carriers from all over the world. Get your hands on the vast network with on land, underwater, and space points of presence. Join our decade-long partnership with BICS to ensure confidence in your future and long-term growth! Tieto-BICS team has been growing since 2010… and we are looking forward to grow with you! • Develop your telecom expertise in diverse portfolio of BICS products, including Voice, Cloud, Signaling, LTE, IoT, etc. • Enjoy unmatched growth opportunities with BICS vast network and customers around the world.Tieto - BICS team has been growing since 2010… and we are looking forward to growing with you!   Responsibilities • Design, develop, and maintain scalable applications using Java and modern frontend technologies • Lead by example and mentor a development team in day-to-day delivery while continuously improving engineering practices • Drive technical discussions and contribute to architecture decisions • Collaborate closely with stakeholders, product owners, and cross-functional teams • Ensure clean, maintainable, and well-tested code • Take ownership of features and deliver end-to-end solutions independentlyRequirements • 5+ years of experience in commercial software development using Java • Strong experience with Java 17+, Spring, Spring Boot, Hibernate, and JPA • Good knowledge of JavaScript and React.js • Experience in API design and development • Strong understanding of relational and NoSQL databases, with expertise in writing and optimizing complex SQL queries • Solid understanding of design patterns, clean code principles, and testing practices • Experience working in Agile/Scrum environments • Strong communication skills in English • Openness to using modern AI tools in daily development workflows (e.g. GitHub Copilot, Claude Code, ChatGPT) • Ability to travel abroad for business trips.Nice to Have • Experience with microservices architecture • Cloud and cloud-native experience (AWS is a plus; Azure or Google Cloud also valuable) • Experience with OSS/BSS integrations; knowledge of CAMARA and GSMA standards is a strong advantage • Experience with Test-Driven Development (TDD) • Experience in performance tuning and system optimizationPersonal Skills • Leadership mindset with a hands-on approach • Proactive, self-driven, and solution-oriented attitude • Strong analytical and problem-solving skills • Team player with a collaborative mindset • Ability to estimate work accurately and commit to delivery plans