Lead Full Stack Developer

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 serve 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 time Lead Full Stack Developer with 5–7 years of hands-on professional experience to lead the design, development, and delivery of our applications while remaining an active, hands-on contributor. You will guide a team of engineers across our backend (C#/.NET and Java/Spring Boot) and frontend (Next.js) stack, take ownership of technical architecture within our microservices ecosystem on Kubernetes, and act as the technical bridge between engineering, product, and stakeholders.

Key Responsibilities

• Lead and mentor a team of full stack developers, providing technical guidance, code reviews, and hands-on support.

• Architect, design, and hands-on build full stack applications using C# (.NET) and/or Java (Spring Boot) for backend services and Next.js for the frontend.

• Own technical decision-making for services within the microservices architecture, ensuring consistency, scalability, and maintainability.

• Guide the design and optimization of PostgreSQL data models, queries, and performance across services.

• Drive best practices for containerized deployments and orchestration using Kubernetes (K8s).

• Set and enforce engineering standards for code quality, testing, Git workflows, and code review practices.

• Champion observability practices using tools such as Grafana, Prometheus, and Loki to proactively monitor system health and performance.

• Break down complex requirements into technical designs and actionable tasks and support sprint planning and estimation.

• Act as the primary technical point of contact for the team, collaborating closely with product managers, QA, DevOps, and other stakeholders.

• Identify technical risks and bottlenecks early, and drive resolution across the team.

• Own critical production issues end to end, leading troubleshooting and root cause analysis when needed.

• Support hiring, onboarding, and the technical growth of team members.

• Continuously evaluate and evolve the technology stack, tooling, and engineering processes.

• 5–7 years of professional, hands-on experience as a Full Stack Developer, with prior experience leading or mentoring other engineers.

• Strong proficiency in C# with the .NET framework, and/or Java with the Spring Boot framework.

• Strong hands-on experience with Next.js for frontend development.

• Deep working knowledge of PostgreSQL, including schema design, query optimization, and performance tuning.

• Solid experience with Git, including branching strategies and leading collaborative development workflows.

• Proven experience designing and operating within a microservices architecture, including service boundaries and inter-service communication.

• Hands-on experience with Kubernetes (K8s) for container orchestration in production environments.

• Comfortable operating in and troubleshooting within a Linux environment.

• Demonstrated ability to make and communicate architectural and technical trade-off decisions.

• Experience with observability and monitoring tools such as Grafana, Prometheus, and Loki.

• Exposure to CI/CD pipelines and infrastructure-as-code practices.

• Experience with cloud platforms and additional containerization tooling (e.g., Docker).

• Prior experience as a technical lead, team lead, or engineering manager in a full stack environment.

• Proven leadership skills with experience guiding, mentoring, and growing a team of developers.

• Excellent communication skills, able to translate technical concepts for both technical and non-technical stakeholders.

• Strong teamwork and collaboration skills, with the ability to work effectively across cross-functional teams.

• Fluency in English, spoken and written.

• Sound judgment and decision-making ability, balancing technical excellence with delivery timelines.

• A proactive, ownership-driven mindset with the ability to stay hands-on while leading others.

• Ability to manage competing priorities and keep the team focused in a fast-paced environment.

• A technical leadership role with real ownership over architecture, standards, and team growth.

• The opportunity to remain hands-on while shaping the direction of a modern microservices-based platform.

• A collaborative engineering culture with strong support 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.