Full Stack Developer – C#/.NET, Java Spring Boot, Next.js

About the role

TOPPAN Security is seeking a Full Stack Developer with 3–5 years of professional experience to design, build, and maintain scalable web applications. You will work in a micro‑services environment on Kubernetes, collaborating with cross‑functional teams to deliver high‑quality software.

Key responsibilities

• Design, develop, test, and maintain full‑stack applications using C#/.NET and/or Java Spring Boot for backend services.
• Build responsive front‑ends with Next.js and create/consume RESTful APIs.
• Design and optimise PostgreSQL schemas, queries, and stored procedures.
• Containerise services and manage deployments with Kubernetes.
• Write clean, well‑tested code, participate in code reviews, and use Git for version control.
• Monitor application health with tools such as Grafana, Prometheus, and Loki.
• Debug and resolve production issues in Linux environments.
• Collaborate with product managers, QA, DevOps, and other engineers throughout the software lifecycle.

Required profile

• 3–5 years of hands‑on experience as a Full Stack Developer or similar role.
• Strong proficiency in C# with .NET and/or Java with Spring Boot.
• Solid experience with Next.js for front‑end development.
• Deep knowledge of PostgreSQL schema design and query optimisation.
• Experience working in a micro‑services architecture and using Kubernetes for orchestration.
• Comfortable working in Linux environments and using Git.

Required skills

• C#
• .NET Framework
• Java
• Spring Boot
• Next.js
• PostgreSQL
• Git
• Kubernetes (K8s)
• Linux
• RESTful APIs
• Microservices architecture
• Grafana (optional)
• Prometheus (optional)
• Loki (optional)