{"id":1449216,"url":"https://alion.io/job/sigma-software-group-middlesenior-java-developer","title":"Middle/Senior Java Developer","company":{"id":6266,"name":"Sigma Software Group","domain":"sigma.software","url":"https://alion.io/company/sigma-software-group","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"services","is_intermediary":false,"listed_via":null,"ats_vendor":"SmartRecruiters","truth_index":null},"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":["Malmö, Sweden"],"countries":["SE"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":57000,"max_usd":156000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":4821},"experience_years_min":4,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"CI/CD","optional":false},{"name":"Docker","optional":false},{"name":"GitHub","optional":false},{"name":"Java","optional":false},{"name":"Kubernetes","optional":false},{"name":"Machine Learning","optional":false},{"name":"Maven","optional":false},{"name":"Memcached","optional":false},{"name":"Netty","optional":false},{"name":"Redis","optional":false},{"name":"Spinnaker","optional":false}],"status":"live","first_seen_at":"2026-09-28T12:20:50Z","employer_posted_date":"2026-09-28","last_verified_at":"2026-09-30T13:54:29Z","board_verified":true,"closed_at":null,"days_open":3,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":3},"description":"Are you passionate about building scalable backend systems that operate under real production load? We are looking for a Middle/Senior Java Backend Developer to join a long-term onsite project in Malmö, Sweden, focused on privacy-sensitive distributed services used at global scale.\nYou will join a small, autonomous engineering team where ownership, technical excellence, and collaboration are highly valued. The role involves full-cycle development, from architecture discussions and implementation to deployment and production support.\nWe at Sigma Software offer the opportunity to work on technically challenging products in an engineering-driven environment with modern technologies, high-quality standards, and long-term project stability.\nCUSTOMER\nOur Customer is a global technology company operating in the consumer electronics and digital services domain. The company develops large-scale platforms and infrastructure used by millions of users worldwide, with a strong focus on privacy, reliability, and seamless user experience.\nPROJECT\nThe project focuses on developing and supporting large-scale backend services operating in a privacy-sensitive environment under high production load. The team designs and maintains distributed systems with strict requirements for reliability, scalability, security, and performance. Engineers work in cross-functional teams and contribute to the entire software development lifecycle.\n Design, develop, and maintain scalable Java backend services and internal frameworks\nParticipate in architecture discussions and contribute to technical solution design\nBuild and support customer-facing services with a focus on reliability, availability, security, and performance\nInvestigate and resolve complex production issues related to concurrency and distributed systems\nWork with authentication, authorization, caching, data storage, and service integrations\nCollaborate with multiple engineering teams and coordinate technical dependencies\nParticipate in code reviews, automated testing, CI/CD processes, and release activities\nPrepare technical documentation and communicate technical decisions to stakeholders\nTake end-to-end ownership of features and technical solutions from concept to production\n 4+ years of commercial experience in Java backend development\nStrong hands-on experience with Java and distributed systems\nDeep understanding of Java internals, including the Java Memory Model, garbage collection, concurrency, and multithreading\nExperience debugging production issues in high-load environments\nStrong knowledge of distributed systems concepts, including consistency, reliability, partitioning, and failure handling\nExperience building and scaling customer-facing backend services\nExperience with authentication and authorization mechanisms\nHands-on experience with Cassandra, Redis, Memcached, or similar technologies\nExperience developing REST-based services using Netty or similar frameworks\nExperience with CI/CD pipelines and automated testing\nStrong analytical and problem-solving skills\nUpper-Intermediate or higher level of English\nWILL BE A PLUS\nKnowledge of cryptography standards and protocols such as PKCS, KMIP, X.509, AES, KDF, and CA\nExperience working with security- and privacy-sensitive systems\nFamiliarity with machine learning systems or algorithms\nExperience with GitHub\nExperience with Maven, Docker, Kubernetes, Spinnaker, or similar tools\n PERSONAL PROFILE\nStrong sense of ownership and accountability\nAbility to work independently in autonomous engineering teams\nAnalytical and problem-solving mindset\nAttention to detail and engineering quality\nStrong communication and collaboration skills\nAbility to work effectively in complex distributed environments","description_format":"text","description_chars":3742,"description_truncated":false,"requirements":{"experience_years_min":4,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"English","level":"All levels","optional":false}]},"benefits":[],"hiring_locations":[{"name":"Sweden","iso":"SE","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["IT Outsourcing & Dedicated Teams","Custom Software Development"],"lifecycle":[{"event":"open","at":"2026-09-29T07:26:28Z"}],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":2,"expected_fill_days":29,"reasons":["conf:15","velocity","win:early"],"computed_at":"2026-10-01T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/sigma-software-group-middlesenior-java-developer","json_url":"https://alion.io/job/sigma-software-group-middlesenior-java-developer.json","meta":{"generated_at":"2026-10-01T20:51:42Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","usage":{"tier":"crawler","counted_by":"address","units_charged":1,"used_today":3250,"day_limit":5000,"remaining_today":1750,"minute_limit":60,"resets_at":"2026-10-02T00:00:00Z"}}}