{"id":2297291,"url":"https://alion.io/job/comsol-experienced-software-engineer-java-net-platform","title":"Experienced Software Engineer Java/.NET Platform","company":{"id":704642,"name":"Comsol","domain":"comsol.com","url":"https://alion.io/company/comsol-3","size_band":"501-1000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"Backend","role_family":"Backend","seniority":null,"employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Stockholm, Sweden"],"countries":["SE"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":47000,"max_usd":126000,"period":"year","method":"role_country_seniority_unknown","sample_n":18},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":".NET","optional":false},{"name":"C#","optional":false},{"name":"Java","optional":false},{"name":"Linux","optional":false},{"name":"Platform Engineering","optional":false},{"name":"Windows","optional":false}],"status":"live","first_seen_at":"2026-10-07T10:45:25Z","employer_posted_date":null,"last_verified_at":"2026-10-07T10:45:25Z","board_verified":false,"closed_at":null,"days_open":10,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":10},"description":"We are looking for an experienced software engineer to join the team responsible for developing the software platforms underlying COMSOL Multiphysics®. You will work with the runtimes, libraries, build systems, and platform integrations that form the foundation of a large, cross-platform engineering software product. The majority of the development is done in Java and C#, together with build and automation tooling.\nAbout COMSOL\nCOMSOL develops cutting-edge mathematical modeling software that powers innovations in physics and engineering. Our flagship product, COMSOL Multiphysics®, is widely used across all fields of engineering, manufacturing, and scientific research to model multiphysics systems. Our customers leverage our software to understand, predict, and optimize product designs and processes. Founded in Sweden in 1986, COMSOL has expanded globally with 16 offices employing more than 500 people worldwide.\nRole\nBased in our newly renovated office in central Stockholm, you will join the core group developing the user interface, communication, and data layer functionality of the COMSOL product suite. The group is also responsible for the Application Builder, Model Manager, COMSOL Server, and COMSOL Compiler functionality, which customers use to create, manage, deploy, and run simulation models and apps.\nIn this role, you will work on several of the software platforms on which our products are built. This includes the Java and .NET runtimes and their ecosystems, third-party libraries, database connectivity and persistence technologies, application launchers, build systems, and integration of vendored software. The work spans multiple operating systems and a large codebase with a long development history.\nYou will evaluate and integrate new runtime and library versions, investigate compatibility issues, implement or backport APIs and other changes where needed, and develop automation that makes recurring platform and dependency work more efficient and reliable.\nThe role also provides opportunities to evolve the platforms themselves. Depending on your experience and interests, this can include introducing new platform capabilities and APIs, improving how runtimes and third-party components are integrated, evolving build and development infrastructure, and finding better ways to support development across the product organization. You will have room to identify improvements and contribute to the longer-term technical direction of the areas you work with.\nResponsibilities include writing and reviewing code, investigating platform and compatibility issues, contributing to technical specifications and design, developing build and platform infrastructure, and testing changes across the supported product platforms.\nQualifications\nFor this position, we are looking for an experienced software engineer with the following qualifications:\nM.Sc. or equivalent degree in computer science, engineering, mathematics, or physics.\nExcellent programming skills with proficiency in at least one object-oriented programming language.\nSeveral years of professional software development experience.\nAn interest in working with complex software systems and improving the technical foundations on which other development depends.\n\nExperience with the following will be highly valued:\nLarge software projects and mature codebases.\nJava and/or .NET runtime environments and their library ecosystems.\nBuild systems, dependency management, and software packaging.\nCross-platform development on Windows, Linux, and macOS.\nIntegrating or adapting third-party and open-source software.\nBuild and development automation.\nDesigning or evolving software platforms, frameworks, or developer infrastructure.\n\nNo background in physics or simulation is required. At COMSOL, you will be part of a company where software developers, mathematicians, physicists, and engineers work together to develop software for science and engineering.\nWorking at COMSOL\nAt COMSOL, platform engineering is closely connected to product development. You will work on technical foundations used throughout the COMSOL product suite, with opportunities both to ensure that those foundations remain robust and current and to improve how they support future product development. Decisions about runtimes, libraries, build systems, and operating-system support have a direct impact on a complex engineering product with a long lifetime.\nNew team members quickly become essential contributors to ongoing development projects. As the company continues to expand, there are plenty of opportunities for employees to advance in their roles and become leading experts in their areas of focus. This journey will be accompanied by experienced colleagues and a collaborative working environment.\nWe also offer:\nA competitive salary\nIndividual pension plans\nSponsored gym membership\nWork-life balance with regular working hours\n\nTo ensure a smooth onboarding process, onsite presence is required. Once onboarded, hybrid work options are available.\nTo Apply\nDoes this sound interesting? Submit your application in English or Swedish using the form below. Make sure to include:\nCover letter\nCV\nUniversity diploma with grades\n\nPlease include your university diploma with grades, regardless of when the degree was obtained. Kindly note that applications submitted through other channels will not be considered.\nTo recruiters, please note that the target channels for this position have already been selected.\nFor more information, contact Mikael Sterner at tel. 08-412 95 00.\nWe review applications continuously.","description_format":"text","description_chars":5587,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Gym membership","Hybrid work"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Simulation & Digital Twin Software"],"lifecycle":[{"event":"open","at":"2026-10-11T20:50:59Z"}],"visa":[],"liveness":{"score":80,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.844,"p_room":0.945,"age_days":9,"expected_fill_days":25,"reasons":["seen:9","velocity","win:mid"],"computed_at":"2026-10-17T05:46:00Z"},"pay":null,"html_url":"https://alion.io/job/comsol-experienced-software-engineer-java-net-platform","json_url":"https://alion.io/job/comsol-experienced-software-engineer-java-net-platform.json","meta":{"generated_at":"2026-10-18T06:35:35Z","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":9747,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-19T00:00:00Z"}},"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":704642},"rest":"https://alion.io/mcp/rest/get_company?id=704642"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fcomsol-experienced-software-engineer-java-net-platform"},{"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%2Fcomsol-experienced-software-engineer-java-net-platform"},{"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%2Fcomsol-experienced-software-engineer-java-net-platform"},{"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/comsol-experienced-software-engineer-java-net-platform\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fcomsol-experienced-software-engineer-java-net-platform"}]}