{"id":2542258,"url":"https://alion.io/job/ilias-solutions-senior-backend-engineer-java","title":"Senior Backend Engineer | Java","company":{"id":2182826,"name":"ILIAS Solutions","domain":"ilias-solutions.com","url":"https://alion.io/company/ilias-solutions","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Personio","truth_index":{"grade":"B","score":75,"open_postings":4,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-15T05:46:00Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":[],"countries":[],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":6,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Apache Kafka","optional":false},{"name":"CI/CD","optional":false},{"name":"Docker","optional":false},{"name":"Flyway","optional":false},{"name":"GitHub Actions","optional":false},{"name":"Grafana","optional":false},{"name":"Helm","optional":false},{"name":"Hibernate","optional":false},{"name":"Java","optional":false},{"name":"Jenkins","optional":false},{"name":"Keycloak","optional":false},{"name":"Kubernetes","optional":false},{"name":"Liquibase","optional":false},{"name":"OpenSearch","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Python","optional":false},{"name":"Quarkus","optional":false},{"name":"Rest API","optional":false},{"name":"SBOM","optional":false},{"name":"SOAP","optional":false},{"name":"SonarQube","optional":false},{"name":"Spark","optional":false},{"name":"Spring Boot","optional":false},{"name":"Oracle","optional":true},{"name":"SQL","optional":true}],"status":"live","first_seen_at":"2026-10-14T15:51:24Z","employer_posted_date":"2026-10-14","last_verified_at":"2026-10-15T06:39:16Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"Opportunity\nHybrid (2 days on-site) · Permanent, full-time\nAbout the role\nOffline, air-gapped installations for NATO customers mean your API versioning and backward-compatibility decisions are not technical hygiene, they are the difference between a fleet that can operate and one that cannot. The backend services you design and maintain run in constrained, version-locked environments where an incompatible release cannot simply be rolled back over a network connection. Beyond feature delivery, this role carries real technical leadership weight: you will help set Java coding standards, guide architectural decisions, and mentor engineers across the Backend Engineers chapter, with an explicit goal of distributing knowledge rather than concentrating it.\nYour Mission\nWhat you'll do\nDesign and maintain Java backend services and APIs so they remain stable and versioned across releases, allowing customers in offline environments to upgrade on their own schedule.\nBuild and own complex business logic and integration layers connecting to legacy and customer systems, working across REST, SOAP, batch file exchange and event-driven patterns with Kafka.\nPackage and deliver services for Kubernetes deployments including offline customer installations, applying reproducible build, image signing and SBOM practices throughout.\nDefine and embed Java coding standards, dependency policies, security defaults and testing practices across the chapter, reducing bus-factor risk through shared ownership.\nContribute to build-or-not decisions alongside product owners, translating technical constraints and integration complexity into options the product team can act on.\nCollaborate with analytics engineers on Python and Spark integrations, and review technical design documents to raise the quality bar across the team.\nWhat success looks like\nOver time, the backend services you own become the most dependable part of the platform: APIs hold their contracts across releases, new engineers can read and extend the codebase without escalating to you, and offline deployments ship with a clear, reproducible packaging trail. As your ownership grows, the chapter's standards documents reflect decisions you have driven and stress-tested with domain experts, and build-or-not conversations happen earlier because the team trusts your technical reading of complexity and risk.\nWhat you bring\n6+ years of professional backend engineering experience with Java as your primary language, and a solid track record across complex, production-grade systems.\nExpert-level Java 17+ with deep knowledge of Spring Boot or Quarkus, and strong JVM internals: garbage collection tuning, memory profiling, heap and thread dump analysis.\nProduction Kafka experience at depth: producers, consumers, idempotency handling and schema evolution, not familiarity, but real operational ownership.\n REST API design with OpenAPI, including versioning strategy and backward compatibility across release cycles; strong JPA/Hibernate, JDBC and database migration tooling (Flyway or Liquibase); PostgreSQL query optimisation, indexing, partitioning and large-table migrations.\nDocker, Kubernetes and Helm in production packaging contexts, not only local development; CI/CD pipelines (Jenkins or GitHub Actions); security and quality tooling including SonarQube, dependency scanning, SBOMs and image signing used in a real delivery pipeline.\nOIDC and Keycloak at the integration and usage level for authentication and authorisation; secrets management, TLS and RBAC; structured logging, metrics and observability tooling (Grafana, OpenSearch or equivalent).\nClear written and verbal communication in English with both engineering and product stakeholders; a degree in computer science or software engineering, or equivalent professional experience that demonstrates the same capability.\nEligibility to obtain and maintain the required national or NATO security clearance for this role (we support candidates through the clearance process).\nIf you meet most of these criteria, we encourage you to apply. The eligibility requirement for the required security clearance is not flexible.\nNice to have\nLegacy integration depth: Oracle, SQL Server, PL/SQL, SOAP or batch file exchange in production contexts.\nAir-gapped or offline software delivery experience, particularly using signed bundles or tooling such as Zarf; experience with FIPS mode or STIG-hardened environments is especially relevant given our deployment constraints.\nAdvanced Keycloak administration and fine-grained authorisation configuration; reactive or async Java patterns using virtual threads or Project Reactor.\nExperience in regulated or defence-adjacent industries; working knowledge of Dutch or French.\nBuild Your Future with ILIAS\nWhy ILIAS Solutions\nILIAS Solutions is part of the Patria Group and builds software that defence operators depend on to plan and execute missions. The platform runs in the environments where failure is not recoverable with a hotfix: offline, air-gapped, version-locked. That context makes correctness and compatibility genuinely consequential, and it makes the engineering choices here matter beyond the sprint.\nThis is a role for an engineer who finds legacy integration intellectually interesting rather than career-limiting, who wants to set standards rather than just meet them, and who values a codebase they can be proud of over one they are the only person who understands. The working language is English; Dutch or French is useful but not required to do the job well.\nEligibility\nBecause of the nature of our work, this role may require eligibility under applicable export-control regulations and the ability to obtain national or NATO security clearance. We assess eligibility lawfully and on a role-by-role basis; specific requirements are discussed during the selection process. We do not exclude candidates on the basis of nationality except where mandated by applicable export-control or security-clearance law.\nHow to apply\nSend your CV and a short note on your backend integration experience to the ILIAS Solutions careers page or via the application link on this posting. Questions before you apply? Reach out to Tim van Dam at , he is happy to tell you more about the role and the clearance process.","description_format":"text","description_chars":6313,"description_truncated":false,"requirements":{"experience_years_min":6,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":true},"security_clearance":false,"languages":[{"language":"Dutch","level":"All levels","optional":true},{"language":"English","level":"Upper-Intermediate (B2)","optional":false}]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Logistics","Military Logistics"],"lifecycle":[{"event":"open","at":"2026-10-14T15:51:24Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":0,"expected_fill_days":38,"reasons":["conf:3","velocity","win:early"],"computed_at":"2026-10-15T05:46:00Z"},"pay":null,"html_url":"https://alion.io/job/ilias-solutions-senior-backend-engineer-java","json_url":"https://alion.io/job/ilias-solutions-senior-backend-engineer-java.json","meta":{"generated_at":"2026-10-15T07:38:31Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":11415,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-16T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":2182826},"rest":"https://alion.io/mcp/rest/get_company?id=2182826"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Filias-solutions-senior-backend-engineer-java"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Filias-solutions-senior-backend-engineer-java"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Filias-solutions-senior-backend-engineer-java"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/ilias-solutions-senior-backend-engineer-java\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Filias-solutions-senior-backend-engineer-java"}]}