Senior Systems Developer (Java Developer) - *Fully Remote*

Role: Senior Java Engineer Location: Remote (UK) Job Type: Full-time, Permanent Salary: Competitive, based on experience + benefits + bonus potential Come and be a part of The Investigo Group (TIG ), a dynamic coalition of cutting-edge tech firms specialising in Platform, Software, Data, AI and other bleeding-edge technology solutions. The group is multi-functional with a large portfolio of B2B products and services. IIS , Providing secure internet access in both the public and private sectors. Vestigo Consulting is our training and consultancy company, tailored around specialist sector-specific knowledge, and provides regular courses and CPD for our community. The Consultancy side concentrates on expert support of our customers as well as specifically assigned individual deployments. Collaboraite is a bleeding-edge company that provides our Data and AI capability. A collaborative partner for designing user-centred secure data solutions to overcome operational hurdles, delivered through design thinking and agile coaching. Diversity, Equity, and Inclusion (DEI) are at the heart of The Investigo Group (TIG). We're dedicated to creating a workplace where people from all backgrounds are not only welcome but empowered to excel. We actively seek diverse talent, promote fairness, and foster an inclusive environment where every voice matters, driving innovation and progress in our dynamic tech community. The group provides bespoke, secure, user-centric products fuelled by deep technical knowledge advanced data and analytical skills. You’re an experienced backend engineer who thrives in collaborative environments and enjoys solving complex technical problems. You’re confident in your skills with Java and bring solid experience with microservices, messaging systems, and scalable architecture. You’ve likely worked in fast-paced environments and know how to strike the balance between delivery speed and long-term maintainability. Thinks deeply about software design and architecture. Believes in writing clean, testable code and values continuous improvement. This is a great opportunity if you're passionate about impactful work, value autonomy and collaboration, and want to help build systems that matter. You’ll be joining a small but mighty cross-functional engineering team within Collaboraite , focused on developing a collaborative data and analytics platform. real-time event handling, secure data ingestion, working with LLMs and Computer Vision models, and crafting high-performance indexing and search pipelines. It’s a great environment for engineers who want to work across a diverse stack, apply modern thinking, and help shape the direction of a fast-growing product and team. We’re hiring a Senior Java Engineer to join our Collaboraite team, building the next generation of secure, high-performance, and scalable data analytics platforms. You’ll help design, build, and deliver features and services that power AI-enabled products used by some of the most respected organisations in the UK. Working alongside software engineers, ML specialists and product colleagues, you’ll contribute to architecture discussions, influence the technical roadmap, and support a culture of engineering excellence. Build and maintain scalable, secure, and high-performance backend systems using Java , with additional exposure to Go and Python . Collaborate cross-functionally with Product, ML Engineers, and Designers to define, plan, and deliver features. Mentor junior engineers and champion best practices in testing, documentation, and code quality. Troubleshoot performance and reliability issues across distributed systems. Influencing technical direction by contributing to architectural decisions and raising the standard of engineering quality across the team. Proactively identifying improvements in system performance, developer experience, or technical debt—and driving them through to implementation. Taking ownership of projects and features from design through to deployment, monitoring, and refinement—delivering value quickly without compromising maintainability. 7+ years of hands-on backend engineering experience, with deep expertise in Java and modern backend ecosystems. ~ Proven experience building microservices and event-driven systems (e.g., Strong relational database skills ( PostgreSQL ), including schema design and SQL optimisation. ~ Experience with RESTful API design and implementation, ideally with Spring Boot or Quarkus . ~ Familiarity with containerisation ( Docker , Kubernetes , Helm ) and DevOps practices. ~ Comfortable working in Agile, cross-functional teams. ~ Security Clearance Requirements This role requires the successful candidate to be eligible for Security Check (SC) clearance . Flexible Working : We offer both hybrid and remote working models. Private Medical Holiday : Generous holiday allowance. Learning : Access to continuous learning and development opportunities. Bonus Potential : Bonus potential based on performance and business-related factors. Discounts : Discounts on a wide range of products and services. Pension : Pension scheme contributions with Government Top-Up EV Car Scheme Please note that the talent acquisition team is managing this vacancy directly and we do not require agency support. Our talent acquisition team will be in touch if you're successful, and the team will arrange a short screening call (max 30 minutes) to learn more about you, what you’re looking for, and answer any questions you may have. Our interview process is tailored to each role but typically the first half is run remotely with a final stage on-site. 1st Stage – An informal 30-minute video call with the hiring team to discuss your skills and relevant experience. Depending on the role, there may also be a short take-home technical exercise or a virtual pair programming task to complete. Here at TIG we are committed to equal opportunities and value diversity, equity and inclusion at our company. We do not discriminate based on race, religion, colour, national origin, sex, gender, gender expression, sexual orientation, age, marital status, veteran status, or disability status. As a Group, we seek to ensure that individuals with disabilities receive reasonable accommodation throughout the hiring process and ultimately within the job itself. Please contact us to request any accommodations.