Mid-Senior Backend Engineer

• Design, develop and maintain scalable backend services and APIs primarily using TypeScript.
• Build and evolve backend applications using Node.js and preferably NestJS.
• Design cloud-native services with high availability, resilience and performance in mind.
• Develop and maintain microservices and event-driven systems.
• Design backend components with strong reliability, observability and security principles.
• Build well-structured REST APIs and service-to-service integrations.
• Design and optimize database models, queries and application performance.
• Collaborate closely with frontend, platform and security engineers.
• Write clean, modular, testable and well-documented production-grade code.
• Participate in code reviews and contribute to backend architecture and engineering standards.
• Troubleshoot production incidents, performance bottlenecks and issues across distributed environments.
• Take ownership of backend features and services from design through deployment and ongoing operation.

We are looking for an experienced Mid-Level or Senior Backend Engineer with at least 4 years of professional software development experience, with a strong background in backend TypeScript development., * 4+ years of professional software engineering experience, primarily in backend development.

• Strong professional experience with TypeScript and Node.js for backend development.
• Hands-on experience designing and building production backend applications and APIs.
• Experience with NestJS is strongly preferred.
• Strong understanding of server-side architecture, API design and service-oriented development.
• Hands-on experience with microservices, distributed systems and common backend design patterns.
• Solid experience with relational databases, preferably PostgreSQL, including data modeling and query optimization.
• Experience working with ORMs or data-access frameworks such as Prisma, TypeORM or similar.
• Good understanding of asynchronous programming and background processing.
• Experience with observability, structured logging, monitoring and debugging production systems.
• Strong understanding of testing, maintainability, clean code and secure coding practices.
• Ability to independently own technical problems and deliver production-ready solutions.

Nice to have

• Strong hands-on experience with NestJS in production environments.
• Experience with Redis and distributed caching.
• Familiarity with queues and asynchronous processing technologies such as BullMQ, NATS, Kafka or RabbitMQ.
• Experience designing event-driven architectures.
• Experience with Kubernetes, Docker and cloud-native infrastructure.
• Exposure to domain-driven design, clean architecture or similar architectural approaches.
• Experience with authentication, authorization and identity platforms such as Keycloak or Microsoft Entra ID.
• Experience building multi-tenant SaaS platforms.
• Experience with high-traffic systems or complex third-party integrations.
• Awareness of secure SDLC, DevSecOps and compliance-driven engineering.
• Experience with Go or Python as an additional backend language is a plus., Candidates should have at least 4 years of relevant professional software engineering experience and substantial hands-on experience building backend applications with TypeScript and Node.js.
• We are particularly interested in engineers who have worked with NestJS in production and are comfortable taking ownership of backend services, APIs and distributed systems.

What we offer

• Flexibility - tailor your working hours and work remotely to maximize efficiency.
• Time for yourself - additional paid days annually on top of your standard vacation allowance.
• Competitive compensation - compensation reflecting your experience and technical level.
• Continuous learning - dedicated budget for certifications, courses and conferences.
• Modern engineering environment - work with TypeScript, NestJS, distributed systems and cloud-native technologies.
• Technical ownership - influence architecture, engineering standards and how the platform evolves.
• Real impact - your work helps protect and accelerate European organizations end to end.

Who this role is for

instX is a European cybersecurity and platform engineering company. We help organizations build secure, resilient and compliant digital foundations, combining platform engineering, DevSecOps, security operations and compliance into one integrated capability.