{"id":3076288,"url":"https://alion.io/job/sainsburys-careers-join-our-team-grow-java-engineer","title":"Java Engineer","company":{"id":2631165,"name":"Sainsbury's","domain":"sainsburys.jobs","url":"https://alion.io/company/sainsburys-jobs","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Oracle","truth_index":null},"role":"Backend","role_family":"Backend","seniority":null,"employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["London, United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":72000,"max_usd":177000,"period":"year","method":"role_country_seniority_unknown","sample_n":404},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"Apache Kafka","optional":false},{"name":"AWS","optional":false},{"name":"Azure","optional":false},{"name":"CI/CD","optional":false},{"name":"GCP","optional":false},{"name":"Java","optional":false},{"name":"Kubernetes","optional":false},{"name":"Maven","optional":false},{"name":"Spring Boot","optional":false}],"status":"live","first_seen_at":"2026-10-21T16:01:27Z","employer_posted_date":"2026-10-21","last_verified_at":"2026-10-25T00:09:00Z","board_verified":true,"closed_at":null,"days_open":3,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":3},"description":"We don’t think we’re exaggerating when we say we have one of the most exciting data sets in the country. The insights we gain help us build scalable, high-performance products using cutting-edge technology-products that give our customers an amazing shopping experience, including our award-winning Smartshop app.\nIn an inclusive, agile environment, you’ll have the space to be curious, to experiment, and to solve real-world challenges. Best of all, you’ll see your work in the hands of millions of people across the UK.\nAs a Java Engineer, you’ll join one of our Engineering teams to create exceptional products aligned to best-practice architectural and engineering principles. Working with Java (17+) and modern frameworks like Spring Boot and Maven, you’ll design and develop large-scale, high-performance services across websites, apps, microservices, and event-driven architectures.\nWe want you to bring your whole self to work-be analytical, curious, and ready to challenge the status quo. You’ll be a key contributor to continuous improvement within your team and the wider engineering community.\nWhat You’ll Do\nDesign and develop large-scale, high-performance services using Java (17+), Spring Boot, Maven, and related tools.\nBuild and enhance websites, apps, microservices, and event-driven architectures.\nContribute to the product technical roadmap.\nWork with cloud and container technologies, including Kubernetes on AWS, Azure, or Google Cloud Platform.\nLead the design and support of internal frameworks that enhance wider engineering capabilities.\nEngineer across the full product lifecycle, including decommissioning.\nConsider cost, scalability, and support implications in all engineering decisions.\nEssential Criteria\nStrong expertise in Java and Spring Boot.\nSolid understanding of engineering and architectural principles, including unit testing and TDD.\nProven experience in software design and implementation across security, cloud, infrastructure as code, and CI/CD.\nHands-on experience with Kafka, including event streaming, messaging, and distributed system architectures\nKnowledge of cloud platforms (AWS, Azure, or GCP) and containerisation (Kubernetes).\nStrong self-drive and commitment to improving processes, teams, and engineering communities.\nAdvocacy for Agile and Lean delivery methodologies.\nPassion for delivering customer-focused solutions and owning the full SDLC following DevSecOps principles.\nCuriosity and a genuine interest in emerging technologies.\nEmpathy, teamwork, and the ability to support others in delivering high-quality outcomes.\nBenefits\nGenerous colleague discount across Sainsbury’s, Argos, and Habitat.\nCompetitive holiday allowance.\nBonus scheme.\nPension plan.\nFlexible / smarter working policy.\nAccess to special offers on gyms, restaurants, holidays, retail vouchers and more.\nWork-life balance matters to us. 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