Back-End Software Engineer – Greenfield Cybersecurity SaaS Solutions

TechHeads is working with a global leader in cybersecurity to bring you an exciting new opportunity for a Backend Software Engineer to join their high-performing London-based team. This is a full-time, permanent position, based fully onsite in central London 5 days a week, offering a unique opportunity to take ownership of core backend systems that power a world-class security platform.

In this role, you’ll be instrumental in designing, building, and optimising high-availability backend services that underpin critical cybersecurity capabilities while also bringing technical leadership to the team. Operating at scale, your work will have a huge impact on systems used by major enterprises and governments worldwide.

You’ll work hands-on with a sophisticated tech stack including Java, Spring Boot and more. You’ll lead initiatives to enhance existing platforms while working on greenfield projects, giving you an opportunity to contribute to the strategic input into the evolution of enterprise scale platforms.

This is a rare opportunity to join a technically elite team that values engineering excellence, technical leadership, and deep domain expertise. You’ll be expected to make confident, informed decisions, and help raise the technical bar across the team.

If you’re a skilled back-end engineer seeking a role where your impact is tangible and your expertise is recognised, this London-based opportunity offers the challenge and scope you’re looking for.

• Design, develop, and maintain Java-based backend services using Spring Boot, REST/GraphQL, Kafka, PostgreSQL, and RabbitMQ.
• Contribute to infrastructure modernisation efforts, working closely with DevOps teams on Kubernetes, CI/CD pipelines, and legacy system migrations.
• Innovate across the stack, taking ownership of key projects and delivering performant, scalable solutions.
• Lead engineering best practices including coding standards, unit testing, code reviews, and system architecture discussions.
• Support, coach, and mentor junior developers, fostering a culture of technical excellence and collaboration.
• Work closely with cross-functional teams, including product and engineering groups in different countries/regions, to ensure alignment and execution.
• Build and deploy secure, resilient APIs (REST/GraphQL) and optimise the full software development lifecycle through automation.

• 7+ years of professional experience in software engineering, with a strong focus on Java backend development.
• Solid understanding of Spring Boot, Kafka, RabbitMQ, PostgreSQL, and modern API design patterns.
• Hands-on experience or familiarity with DevOps tools and concepts – e.g. Kubernetes, Git-based CI/CD, cloud infrastructure (AWS/GCP/Azure).
• Strong grasp of software security principles, system performance optimisation, and infrastructure reliability.
• Experience working on large-scale, production-grade systems with distributed architectures.

• Exposure to tools like Elasticsearch/Kibana, Hadoop/HBase, OpenSearch, or VPN/proxy architectures.

• Bring technical vision, initiative, and a passion for exploring and implementing emerging technologies.
• Be a natural technical leader with experience mentoring engineers and driving engineering quality across teams.
• Enjoy solving complex problems and have a product mindset with an eye toward continuous improvement.

Salary: £100,000 - £120,000 DOE

Equity, Healthcare and More

If you would like to be considered for this position, please share a copy of your updated CV to thomas@techheads.ie