Hybrid Senior Software Engineer – Backend

at WSD

• Job title: Senior Software Engineer – Backend
• Job type: Full Time
• Experience level: Senior
• Salary: Not specified
• Degree requirement: Bachelor's Degree
• Tech skills: Apache, Cloud, Distributed Systems, Docker, ElasticSearch, Java, JavaScript, Kafka, Kotlin, Kubernetes, Microservices, MongoDB, Node.js, NoSQL, Postgres, Redis, Spring, Spring Boot, SpringBoot
• Location requirements: Hybrid, London, United Kingdom

About the role

• Senior Software Engineer designing and building scalable cloud-native backend services. Collaborating in Agile environment using Node.js, Java/Kotlin, and container orchestration.

Responsibilities

• Design and develop scalable backend services using Node.js (NestJS) and Java / Kotlin (Spring Boot)
• Build and maintain event-driven architectures using Apache Kafka
• Develop RESTful and asynchronous APIs for internal and external services
• Design and optimise data models using PostgreSQL, MongoDB, and Redis
• Deploy and operate services across Windows Server, Docker, and Kubernetes environments
• Build and maintain CI/CD pipelines using GitHub Actions to automate testing, security checks, and deployments
• Implement and maintain cloud-native application architectures focusing on reliability, scalability, and observability
• Integrate Elasticsearch for logging, search, and analytics capabilities
• Ensure code quality and security standards using tools such as SonarQube, OWASP dependency checks, and TruffleHog
• Participate in Agile ceremonies including sprint planning, stand-ups, and retrospectives
• Mentor junior engineers and contribute to engineering best practices and architectural decisions.

Requirements

• Minimum 5+ years of experience
• Strong backend development experience with Node.js and NestJS
• Solid experience building services with Java / Kotlin and Spring Boot
• Experience working with Apache Kafka or other distributed messaging systems
• Strong knowledge of relational and NoSQL databases including PostgreSQL and MongoDB
• Experience using Redis for caching, messaging, or performance optimisation
• Hands-on experience with containerisation (Docker) and orchestration platforms (Kubernetes)
• Experience deploying or maintaining applications on Windows Server environments
• Practical experience building CI/CD pipelines using GitHub Actions
• Familiarity with cloud-native architecture patterns (microservices, distributed systems, resilience)
• Experience with Elasticsearch for search, logging, or monitoring solutions
• Knowledge of secure development practices, including static analysis and security scanning tools such as: SonarQube, OWASP tools, TruffleHog
• Experience working in an Agile/Scrum development environment.

Benefits

• Employer values diversity and encourages applications from all backgrounds.