Java Engineer

Job Overview

As a Java Engineer, you will be responsible for designing, building and maintaining scalable, high-performance backend systems that power Info Sum’s data collaboration platform. You will work closely with cross‑functional teams, including frontend engineers, product representatives and infrastructure teams, to deliver robust and efficient solutions. This role requires expertise in Java, backend development, system architecture and database management, with a focus on performance, security, and reliability.

• Design and implement scalable, high-performance backend services that support business needs.
• Identify and resolve performance bottlenecks to ensure smooth operation under high loads.
• Implement security best practices to protect data and ensure compliance with industry regulations.
• Develop automated testing strategies to maintain code quality and system reliability.
• Work with product, frontend and Dev Ops teams to ensure seamless integration and deployment of backend services. Provide mentorship to junior engineers and contribute to team knowledge sharing.
• Implement monitoring and logging solutions to proactively detect and address issues in production.
• Stay updated on emerging technologies and apply best practices to improve system efficiency and maintainability.

• Understand and comply with Info Sum’s security and privacy policies, maintaining a strong focus on information security in all backend‑related activities.

• 3+ years of experience in backend development, with expertise in Java. Experience with Python and/or Go would be advantageous.
• Strong understanding of distributed systems, gRPC, microservices architecture, and RESTful APIs.
• Experience with cloud platforms (AWS, Azure, or GCP) and containerization (Docker, Kubernetes).
• Solid understanding of database design and query optimization.
• Knowledge of scalability strategies, microservices architecture, load balancing, caching, and event‑driven architectures, in particular Kafka.
• Strong experience with CI/CD pipelines and automated testing to ensure reliable deployments.
• Excellent problem‑solving skills with the ability to diagnose and resolve complex technical issues.
• Strong collaboration and communication skills to work effectively in a cross‑functional team.

A competitive salary based on your experience and ability to perform in role

• 25 days annual leave (excluding bank holidays) + a day off for your birthday + 2 Volunteering days
• Private medical insurance
• Life assurance - 4x your base salary
• Fantastic corporate discounts and mental wellbeing support, including a top of line EAP.
• Salary sacrifice pension scheme
• Enhanced Maternity, Adoption & Share Parental Leave
• We have fantastic offices in Basingstoke and London complete with a fully stocked fridge / snacks and catered lunches 2 times a week.
• We also reward our teams with monthly socials, 4pm finishes on a Friday & 3pm Fridays finishes during the summer months of June, July and August, 3 extra days off during the Christmas holidays and a culture built on recognition, collaboration and success