{"id":2974959,"url":"https://alion.io/job/inetum-senior-fullstack-software-engineer-java-react","title":"Senior Fullstack Software Engineer (Java & React)","company":{"id":3561,"name":"Inetum","domain":"inetum.com","url":"https://alion.io/company/inetum","size_band":"5000+","is_staffing_agency":false,"employer_type":"services","is_intermediary":false,"listed_via":null,"ats_vendor":"SmartRecruiters","truth_index":{"grade":"B","score":81,"open_postings":535,"ghost_share":0,"stale_share":0.768,"repost_share":0,"time_to_fill_p50_days":35,"computed_at":"2026-10-31T05:58:55Z"}},"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":["Warsaw, Poland"],"countries":["PL"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":51000,"max_usd":84000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":352},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"Copilot","optional":false},{"name":"Docker","optional":false},{"name":"Git","optional":false},{"name":"Hibernate","optional":false},{"name":"JavaScript","optional":false},{"name":"JUnit","optional":false},{"name":"Kubernetes","optional":false},{"name":"Mockito","optional":false},{"name":"npm","optional":false},{"name":"React.js","optional":false},{"name":"Rest API","optional":false},{"name":"ServiceNow","optional":false},{"name":"Spring Boot","optional":false},{"name":"TypeScript","optional":false},{"name":"CI/CD","optional":true},{"name":"Helm","optional":true},{"name":"Java","optional":true},{"name":"Jenkins","optional":true},{"name":"Kotlin","optional":true},{"name":"Playwright","optional":true}],"status":"live","first_seen_at":"2026-10-20T10:54:41Z","employer_posted_date":"2026-10-20","last_verified_at":"2026-10-31T23:32:44Z","board_verified":true,"closed_at":null,"days_open":11,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":11},"description":"Inetum Polska is part of the global Inetum Group and plays a key role in driving the digital transformation of businesses and public institutions. Operating in cities such as Warsaw, Poznan, Katowice, Lublin, Rzeszow, Lodz the company offers a wide range of IT services. Inetum Polska actively supports employee development by fully funding training, certifications, and participation in technology conferences. Additionally, the company is involved in local social initiatives, such as charitable projects and promoting an active lifestyle. It prides itself on fostering a diverse and inclusive work environment, ensuring equal opportunities for all.\nGlobally, Inetum operates in 19 countries and employs over 28,000 professionals. The company focuses on four key areas:\nConsulting (Inetum Consulting): Strategic advisory services that help organizations define and implement innovative solutions.\n\nInfrastructure and Application Management (Inetum Technologies): Designing and managing IT systems tailored to clients’ individual needs.\n\nSoftware Implementation (Inetum Solutions): Deploying partner solutions from industry leaders like Microsoft, SAP, Salesforce, and ServiceNow.\n\nCustom Software Development (Inetum Software): Creating unique software solutions to meet specific client needs.\n\nWith strategic partnerships with major technology giants, including Microsoft, SAP, Salesforce, and ServiceNow, Inetum delivers advanced technological solutions tailored to customer requirements. In 2023, Inetum reported revenues of €2.5 billion, underscoring its strong position in the digital services market.\nInetum distinguishes itself by offering a comprehensive range of benefits that meet the diverse needs of employees, providing flexibility, support and commitment. Here's what makes working at Inetum unique:\nFlexible and hybrid work:\nFlexible working hours.\n\nHybrid work model, allowing employees to divide their time between home and modern offices in key Polish cities.\n\nAttractive financial benefits:\nA cafeteria system that allows employees to personalize benefits by choosing from a variety of options.\n\nGenerous referral bonuses, offering up to PLN6,000 for referring specialists.\n\nAdditional revenue sharing opportunities for initiating partnerships with new clients.\n\nProfessional development and team support:\nOngoing guidance from a dedicated Team Manager for each employee.\n\nTailored technical mentoring from an assigned technical leader, depending on individual expertise and project needs.\n\nCommunity and Well-Being:\nDedicated team-building budget for online and on-site team events.\n\nOpportunities to participate in charitable initiatives and local sports programs.\n\nA supportive and inclusive work culture with an emphasis on diversity and mutual respect.\n\n We are looking for a Senior Fullstack Software Engineer (Java & React) to join a team developing a large-scale digital commerce platform based on microservices and micro-frontends.\nYou will work end-to-end with Java 25, Spring Boot 4, Spring WebFlux, React, TypeScript and Kubernetes, building new features, integrating backend services and helping modernize the existing platform through legacy migration and technical debt reduction.\nA key part of the project is AI-driven development, with coding agents and GitHub Copilot becoming part of everyday engineering. We are looking for someone who actively uses AI coding tools and is interested in shaping how they can improve software development.\nMain tasks\nDevelop and evolve a distributed online platform based on microservices and micro-frontends.\nTake end-to-end ownership of features, working across both backend and frontend within the same service.\nBuild and maintain backend services using Java, Spring Boot and Spring WebFlux, including REST APIs and integrations with internal and backend systems.\nDevelop frontend functionality using React, TypeScript, JavaScript, HTML and NPM.\nWork with content delivered through a CMS and related content delivery services.\nImplement new platform features and support the migration of legacy applications to the modern architecture.\nImprove the existing codebase through refactoring, technical debt reduction and resolution of long-standing technical issues.\nContribute to the adoption of new API standards, including TM Forum Open APIs.\nWork with containerized applications using Kubernetes and Docker, including deployment, operation, monitoring and troubleshooting.\nUse AI coding agents and AI-assisted development workflows as part of your daily work and contribute to improving these practices within the team.\nWork on multiple initiatives of different sizes, from short tasks to larger projects.\nParticipate in knowledge-transfer activities, keep technical documentation up to date and actively share knowledge with other developers.\n Requirements\nSeveral years of professional experience in developing modern web applications, with strong backend expertise and the ability to work independently at Senior level.\nStrong practical knowledge of Java 8+ and Spring Boot, as well as REST API design with JSON.\nFamiliarity with current versions of the Java/Spring ecosystem and a strong understanding of reactive programming, supported by hands-on experience with Spring WebFlux, Project Reactor or a comparable reactive stack.\nHands-on frontend experience with React, TypeScript, JavaScript, HTML and NPM, with the confidence to work across frontend and backend within the same service.\nExperience with JUnit, Mockito, WireMock, Git, JPA/Hibernate and XML processing technologies such as XSLT, XPath and XQuery.\nHands-on experience with Kubernetes and Docker, including deployment, operation, monitoring and troubleshooting of containerized applications in cloud-native environments.\nExperience developing and evolving microservice-based and distributed systems, including working with established, long-running codebases.\nPractical experience with AI-driven software development, for example GitHub Copilot, OpenCode, coding agents, context management, harness engineering or spec-driven development.\nRegular use of AI coding agents in software development, including adapting prompts or skills to your needs and using AI to generate a meaningful part of your code. You should be able to explain how these tools improve your development workflow.\nAbility to take ownership of features from design through production and make sound technical decisions within a distributed architecture.\nA proactive, analytical and quality-oriented approach, with a focus on continuous improvement and practical problem-solving.\nWillingness to challenge existing approaches, contribute your own ideas, review code, share knowledge and support other developers.\nAbility to work effectively in an Agile, distributed and international environment.\n English and Polish, both written and spoken (minimum B2).\nNice to have\nExperience with micro-frontend architectures.\nKnowledge of Helm charts and Jenkins CI/CD pipelines.\nExperience with headless or content-driven systems, particularly NEOS CMS.\nExperience migrating legacy applications to modern platforms.\nExperience with larger refactoring and technical debt reduction initiatives.\nPrevious experience working in distributed, multinational and remote teams.\nKnowledge of BDD and test automation beyond unit testing, for example Playwright.\n This position offers a hybrid or remote work model. Office location: Warszawa, Poznań, Lublin\nPlease be advised that we will contact only selected candidates\nWe hereby inform you that Inetum Polska sp. z o.o. has implemented an internal reporting (whistleblowing) procedure. The content of the procedure and the possibility to submit an internal report are available at:\nhttps://inetum.whispli.com/speakup?locale=pl","description_format":"text","description_chars":7769,"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":[{"language":"English","level":"All levels","optional":false},{"language":"Polish","level":"All levels","optional":false}]},"benefits":["Cafeteria","Flexible schedule","Hybrid work","Professional development"],"hiring_locations":[{"name":"Poland","iso":"PL","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["IT Consulting & Digital Transformation","Managed IT Services (MSP)","Systems Integrators"],"lifecycle":[{"event":"open","at":"2026-10-21T04:18:23Z"}],"visa":[],"liveness":{"score":62,"band":"ok","label":"Likely open","p_open":1,"p_active":0.625,"p_room":1,"age_days":10,"expected_fill_days":35,"reasons":["conf:0","stale_co","velocity","win:early","comp:brand"],"computed_at":"2026-10-31T05:58:55Z"},"pay":null,"html_url":"https://alion.io/job/inetum-senior-fullstack-software-engineer-java-react","json_url":"https://alion.io/job/inetum-senior-fullstack-software-engineer-java-react.json","meta":{"generated_at":"2026-10-31T23:36:20Z","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":36964,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-01T00:00:00Z"}},"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":3561},"rest":"https://alion.io/mcp/rest/get_company?id=3561"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Finetum-senior-fullstack-software-engineer-java-react"},{"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%2Finetum-senior-fullstack-software-engineer-java-react"},{"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%2Finetum-senior-fullstack-software-engineer-java-react"},{"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/inetum-senior-fullstack-software-engineer-java-react\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Finetum-senior-fullstack-software-engineer-java-react"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":2974959}},{"tool":"search_jobs","arguments":{"company":"inetum.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":2974959},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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