Senior Software Engineer (Java) – Greenfield Cyber Security SaaS Solutions

Permanent | Onsite | London

£85,000 - £100,000 DOE

TechHeads is proud to partner with a global cybersecurity leader on a high-impact opportunity for a Senior Software Engineer. This permanent role based onsite in central London (5 days a week), offers the chance to work shoulder-to-shoulder with a world-class team on complex, secure SaaS systems powering global enterprises.

As a Senior Backend Engineer, you’ll play a key role in designing and building greenfield backend services using Java and Spring Boot, with a strong emphasis on DevOps, automation, and performance at scale. You will help shape technical direction, lead by example in code quality, and champion best practices across the team.

You’ll be working on the core of next-gen cybersecurity products, including enterprise-grade systems built from the ground up. With a focus on innovation and engineering excellence, this role offers real technical ownership and the chance to make architectural decisions that scale globally.

You’ll be part of a forward-thinking, collaborative team where ideas are shared, voices are heard, and initiative is rewarded. This is an opportunity to grow fast, work on meaningful problems, and expand your skills in a technically rich environment.

If you’re looking to elevate your career, build secure and scalable systems, and play a key role in a global product roadmap, we want to hear from you.

Responsibilities:

• 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.

Requirements:

• 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.

Nice to Have:

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

Ideal Candidate will:

• 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.

Compensation:

Salary: £85,000 - £100,000 DOE

Benefits: 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