{"id":2076171,"url":"https://alion.io/job/opsec-security-senior-software-engineer-gb","title":"Senior Software Engineer - GB","company":{"id":1859717,"name":"OpSec Security","domain":"opsecsecurity.com","url":"https://alion.io/company/opsecsecurity","size_band":"501-1000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"UltiPro","truth_index":{"grade":"A","score":88,"open_postings":34,"ghost_share":0,"stale_share":0.5,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-10T05:45:15Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Gateshead, United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":79000,"max_usd":157000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":114},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":".NET","optional":false},{"name":"Agile","optional":false},{"name":"Angular","optional":false},{"name":"C#","optional":false},{"name":"CI/CD","optional":false},{"name":"Git","optional":false},{"name":"JavaScript","optional":false},{"name":"Jira","optional":false},{"name":"Octopus Deploy","optional":false},{"name":"PostgreSQL","optional":false},{"name":"React.js","optional":false},{"name":"Scrum","optional":false},{"name":"Slack","optional":false},{"name":"Spring Boot","optional":false},{"name":"SQL","optional":false},{"name":"TypeScript","optional":false},{"name":"Vue.js","optional":false},{"name":"Java","optional":true}],"status":"live","first_seen_at":"2026-10-08T08:17:04Z","employer_posted_date":"2026-10-08","last_verified_at":"2026-10-11T16:42:00Z","board_verified":true,"closed_at":null,"days_open":3,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":3},"description":"As a partner to businesses and governments, Crane Authentication offers expertise and cutting-edge innovations that protect and enhance products, secure identities, safeguard revenues and enforce compliance. Customers from different business sectors and levels of government trust our team of 1,250 people for their expertise in R&D, security design, engineering and data-driven insights. We are an integral part of Crane NXT, a $2 billion dollar business with over 5,000 associates\nPosition Summary\nWe are looking for a collaborative, engaged, and technically strong Senior Full Stack Software Engineer to join our team. You will contribute across the entire development lifecycle, designing, building, testing, deploying, and supporting high-quality software solutions.\nYou should be comfortable working with both backend technologies (.NET or Java/Spring) and modern frontend frameworks, even if your primary expertise is stronger in one area. As a senior engineer, you will mentor others, drive technical discussions, and help the team deliver scalable, maintainable systems.\nThis role also includes contributing to deployment processes, including CI/CD pipelines and environment configuration.\nKey Responsibilities\nCollaboration & Leadership\nWork closely with Product Owners, Tech Leads and other engineers to understand product goals, explore ideas, and shape technical solutions.\nContribute thoughtfully to architectural discussions, code reviews, and design sessions.\nMentor and support engineers at all levels, helping the team develop skills, confidence, and engineering discipline.\nParticipate fully in Agile ceremonies (refinement, planning, retrospectives) as part of a cross-functional Scrum team.\nSoftware Engineering\nDesign and build backend services and APIs using both .NET (C#) and Java/Spring Boot.\nDevelop user interfaces using React.\nCollaborate on the design and development of microservices and distributed systems.\nWrite automated tests to ensure reliability and maintainability.\nReview and improve existing systems to address bugs, performance issues, and new product requirements.\nMaintain strong code quality through pairing, reviews, automated testing, and shared engineering standards.\nCloud & Deployment\nContribute to deployments using CI/CD pipelines and Octopus.\nWork with infrastructure components such as messaging systems, databases, caches, and monitoring tools.\nHelp ensure services are observable, resilient, and ready for scale.\nTechnical Ownership\nInvestigate and resolve technical issues, supporting the team through escalations when needed.\nAdvocate for continuous improvement in processes, tools, architecture, and engineering practices.\nChampion maintainable, scalable solutions with a long-term perspective.\nEssential Technical Skills\nStrong experience of developing APIs and backend services which use relational databases such as SQL Server or Postgres in one of the following, with a willingness to work in both:\nJava / Spring: Java 8+ with Spring\nC# / .NET: C# .Net Core 5+\nExperience developing user interfaces using modern JavaScript/TypeScript frameworks such as React, Angular, or Vue.\nEducation & Experience\n5+ years developing commercial software\nExperience with Git and team collaboration tools (Slack, Teams, Jira)\nKnowledge, Skills & Abilities\nProven ability to deliver enterprise-grade software with high reliability\nStrong understanding of modern engineering practices\nExcellent communication and collaboration skills\nStrong problem-solving and architectural thinking\nPassion for mentoring, knowledge sharing, and supporting a high-performing team\nWHAT’S IN IT FOR YOU?\nWork for a market leading, established product company.\nNice modern offices with great facilities.\nHealth Insurance.\n24 days holidays plus national holidays.\nLife Insurance.\nCrane Authentication is part of Crane NXT\nCrane NXT is a premier industrial technology company that provides proprietary and trusted technology solutions to secure, detect, and authenticate what matters most to its customers. Crane NXT has approximately 5,000 employees with global operations and manufacturing facilities in the United States, the United Kingdom, Mexico, Japan, Switzerland, Germany, Sweden, and Malta. For more information, visit www.cranenxt.com.\nWe value diversity at our company. Everyone who applies with the qualifications will receive consideration for employment without regard to: age, colour, national origin, citizenship status, physical or mental disability, race, religion, creed, gender, sex, sexual orientation, gender identity and/or expression, genetic information, marital status, status with regard to public assistance, veteran status, or any other characteristic protected by law.\nWe receive a high number of applications, so apologies if we are unable to provide specific feedback. 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