Lead/Senior Software Engineer (Backend)

Designs, develops, and operates scalable backend software solutions that form the foundation of modern service-based architectures. Combines deep backend engineering expertise with broad cross-functional understanding across adjacent domains such as cloud infrastructure, DevOps, security, performance optimization, and product integration. Acts as a T-shaped engineer, bringing strong specialization in backend systems while effectively collaborating across disciplines to maximize product value. The role requires close collaboration with globally distributed teams across regions and time zones to ensure alignment, consistency, and successful delivery of shared engineering objectives.

Responsibilities

Design and develop backend solutions as part of a larger service-based system architecture, ensuring scalability, reliability, maintainability, and security; Take ownership of the complete backend software lifecycle, including conception, architecture design, coding, testing, deployment, monitoring, and continuous improvement; Apply T-shaped engineering principles by contributing beyond backend specialization, including awareness of frontend integration, DevOps processes, cloud operations, observability, and security best practices; Investigate, evaluate, and integrate innovative technologies and solutions that enhance architecture, developer productivity, and product capabilities; Automate system setup, deployment, maintenance, monitoring, and incident response processes to ensure stable and efficient backend services; Continuously improve technical concepts, system performance, implementation approaches, driving innovation and engineering excellence; Identify technical debt, architectural bottlenecks, and system inefficiencies, and proactively drive remediation initiatives; Establish and embed the best engineering practices, design principles, coding standards, and reusable tools within the development team; Collaborate closely with Product, Frontend, DevOps, QA, Security, and globally distributed engineering teams to deliver high-quality, customer-oriented software solutions; Participate in technical discussions with global stakeholders, contributing to architectural decisions, backend standards, and shared engineering practices across international teams; Participate in code reviews, provide constructive feedback, and mentor peers and junior engineers to strengthen code quality and knowledge sharing

Requirements

University degree in Computer Science, Informatics, Engineering, or related technical field; 5+ years of backend development experience in distributed systems; Deep backend expertise with broad adjacent technical knowledge (T-shaped profile); Proficiency in Java and DevOps; Experience with Spring Boot, Microservices, CI/CD, RESTful, GraphQL; Strong understanding of software design principles, modular architecture, and API design; Ability to analyze technical trade-offs and design scalable solutions; Experience with Git, Gradle/Maven, IDEs, GitLab CI/CD; Familiarity with Jira and Confluence for collaboration and documentation; Awareness of clean code principles, maintainability, and long-term software quality; Very good English communication skills, written and spoken; Working knowledge of cloud platforms (AWS), CI/CD pipelines, monitoring/logging tools; Understanding of secure coding, authentication, and authorization; Knowledge of frontend-backend integration patterns; Ability to connect backend architecture decisions with business outcomes and customer impact; Willingness to contribute in DevOps, performance optimization, security, and test automation; Ability to work effectively in multicultural, globally distributed teams; Strong motivation and passion for backend engineering with curiosity beyond specialization; T-shaped mindset: deep backend expertise with openness to adjacent disciplines; Excellent analytical and systems-thinking abilities for complex challenges; Pragmatic decision-making aligned to product and operational goals; Self-driven, adaptable, and comfortable in dynamic environments; Strong interpersonal, communication, and collaboration skills; Friendly, open-minded, confident, and able to build effective relationships across cultures; Passion for continuous learning, innovation, and improving practices; Genuine motivation to contribute to organizational success and align with company values

Nice to have

TypeScript or Vue.js; Test-Driven Development (TDD); Experience with SQL/NoSQL databases, Docker, Linux environments, AWS, AI/ML integration

Benefits

A stable role within a company rooted in strong German roots, backed by a clear vision and long-term security; A dynamic, international work environment with excellent opportunities for rapid career growth; Extensive professional development support, including a dedicated training budget and access to internal learning programs; A permanent position with a competitive base salary, attractive bonus structure, and comprehensive benefits package; Hybrid work model; Access to an Employee Assistance Program to support your mental well-being; Regular sports activities, team events, and company getaways that foster connection and collaboration; Complimentary lunch, beverages, and coffee at all 4flow locations; Comprehensive health insurance coverage, including GMC, GPA, GTL, and OPD