Full Stack Developer

Job description

ABOUT US At TOPPAN Security, our mission is to shape a meaningful, technology-driven future by being a global leader in mission-critical identity and payment technologies. We serves as the international development arm of the TOPPAN Group in the security domain founded in 1900. TOPPAN is a trusted Japanese brand renowned for its commitment to exceptional quality. Building on this legacy, we combine bold ideas, deep sector expertise, and collaborative intelligence to deliver secure, future-ready solutions. Our culture is grounded in four core values: Agility , Ownership , Resilience , and a Sense of Fun . We move fast, lead with accountability, grow through challenges, and bring positive energy into everything we do. Join us and be part of a global, collaborative team where trust and innovation drive everything we do. ABOUT THE ROLE We are looking for a Full Stack Developer with 3–5 years of hands-on professional experience to design, build, and maintain scalable web applications across our backend and frontend stack. You will work within a microservices architecture deployed on Kubernetes, collaborating closely with cross-functional teams to deliver reliable, high-quality software in a fast-paced environment. Key Responsibilities • Design, develop, test, and maintain full stack applications using C# (.NET) and/or Java (Spring Boot) for backend services and Next.js for the frontend. • Build and consume RESTful APIs and services within a microservices architecture. • Design and optimize PostgreSQL database schemas, queries, and stored procedures for performance and reliability. • Develop, deploy, and manage containerized services orchestrated with Kubernetes (K8s). • Write clean, maintainable, and well-tested code, and participate actively in code reviews. • Use Git for version control, following branching and collaboration best practices. • Monitor and troubleshoot application health and performance using observability tools such as Grafana, Prometheus, and Loki (a plus). • Operate confidently in Linux server environments for development, debugging, and deployment tasks. • Collaborate with product managers, QA, DevOps, and other engineers throughout the software development lifecycle. • Troubleshoot, debug, and resolve production issues in a timely manner. • Contribute to technical documentation and participate in architecture and design discussions. Required Technical Skills • 3–5 years of professional, hands-on experience as a Full Stack Developer or in a similar role. • Strong proficiency in C# with the .NET framework, and/or Java with the Spring Boot framework. • Solid hands-on experience with Next.js for frontend development. • Strong working knowledge of PostgreSQL, including schema design and query optimization. • Practical experience with Git for version control and collaborative development workflows. • Understanding of and experience working within a microservices architecture. • Hands-on experience with Kubernetes (K8s) for container orchestration. • Comfortable working in a Linux environment. Nice to Have • Experience with observability and monitoring tools such as Grafana, Prometheus, and Loki. • Exposure to CI/CD pipelines and infrastructure-as-code practices. • Familiarity with cloud platforms and containerization tools beyond Kubernetes (e.g., Docker). Soft Skills & Other Requirements • Strong teamwork and collaboration skills, with the ability to work effectively in cross-functional teams. • Excellent communication skills, able to clearly explain technical concepts to both technical and non-technical stakeholders. • Fluency in English, spoken and written. • Strong problem-solving skills and attention to detail. • Ability to manage time effectively and prioritize tasks in a fast-paced environment. • A proactive, ownership-driven mindset with a willingness to learn and adapt to new technologies. What We Offer • The opportunity to work on impactful, large-scale systems within a modern microservices architecture. • A collaborative engineering culture with room for professional growth. • Exposure to a diverse and modern technology stack across backend, frontend, and infrastructure. TOPPAN is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, gender, sexual orientation, age, color, religion, national origin, veteran status, or disability.