{"id":3327578,"url":"https://alion.io/job/atos-full-stack-developer-with-react-java-and-kafka-6-months-contract","title":"Full Stack Developer with React, Java and Kafka - 6 months contract","company":{"id":3006,"name":"Atos","domain":"atos.net","url":"https://alion.io/company/atos","size_band":"5000+","is_staffing_agency":false,"employer_type":"services","is_intermediary":false,"listed_via":null,"ats_vendor":"SuccessFactors","truth_index":{"grade":"A","score":99,"open_postings":17,"ghost_share":0,"stale_share":0.059,"repost_share":0,"time_to_fill_p50_days":26,"computed_at":"2026-11-06T05:58:05Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"contractor","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Kraków, Poland"],"countries":["PL"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":48000,"max_usd":81000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":352},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"Apache Kafka","optional":false},{"name":"Apache Tomcat","optional":false},{"name":"Confluence","optional":false},{"name":"ElasticSearch","optional":false},{"name":"Fortify","optional":false},{"name":"Git","optional":false},{"name":"JavaScript","optional":false},{"name":"Jira","optional":false},{"name":"JUnit","optional":false},{"name":"Maven","optional":false},{"name":"Rancher","optional":false},{"name":"React.js","optional":false},{"name":"Rest API","optional":false},{"name":"Scrum","optional":false},{"name":"SonarQube","optional":false},{"name":"Spring Boot","optional":false},{"name":"Spring Framework","optional":false},{"name":"TypeScript","optional":false},{"name":"CI/CD","optional":true},{"name":"Java","optional":true}],"status":"closed","first_seen_at":"2026-07-07T02:00:00Z","employer_posted_date":"2026-07-07","last_verified_at":"2026-11-04T07:39:20Z","board_verified":false,"closed_at":"2026-11-04T07:39:20Z","days_open":120,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":120},"description":"Atos is the Atos Group brand dedicated to AI-powered, secure, end-to-end digital services. Atos designs, develops, and operates critical digital environments that drive performance, resilience and sovereignty, helping public and private organizations worldwide retain control over their data and infrastructures, while meeting regulatory requirements.\nWith more than 52,000 employees serving over 4,500 clients across 54 countries, Atos helps modernize core IT systems, accelerate cloud and data transformation, strengthen cybersecurity, and deliver secure digital workplace environments to support its clients, its employees and society. Atos also provides consulting and advisory services through its Atos Amplify brand.\nA trusted partner in operating complex and mission-critical environments, Atos supports organizations across highly regulated and sovereign contexts.\nAbout Atos Group\nAtos Group is a global leader in digital transformation with c. 54,000 employees and annual revenue of c. €7.2 billion, operating in 54 countries under two brands - Atos for services and Eviden for products and systems. European number one in cybersecurity and a leader in cloud, Atos Group is committed to a secure and decarbonized future and provides tailored AI-powered, end-to-end solutions for all industries. Atos Group is listed on Euronext Paris.\nSenior Software Engineer (Full Stack Developer)\nWe are looking for an experienced Senior Software Engineer (Full Stack Developer) to join an international team working on the SIMPL Programme, an initiative focused on developing a secure, modular and interoperable platform supporting European data spaces and cloud-to-edge solutions.\nYou will work hands-on across frontend and backend development, building scalable applications, APIs and integrations in close cooperation with Architects, Product Owners, Business Analysts, Test Engineers and DevOps specialists.\nResponsibilities:\nDesign, develop, test and maintain backend services using Java 21, Spring Framework and Spring Boot.\nDevelop modern frontend applications using React, TypeScript and JavaScript.\nDesign, develop and maintain REST APIs and platform integrations.\nBuild and support event-driven integrations using Apache Kafka.\nDevelop and optimize application interactions with relational databases.\nEnsure high code quality through automated testing, peer reviews, JUnit, SonarQube and secure coding practices.\nIdentify and address security findings and vulnerabilities, including those identified through Fortify and other security scans.\nBuild and package applications using Maven and support deployment and operational activities in Tomcat-based environments, Argo and Rancher.\nInvestigate and troubleshoot technical issues using logs, monitoring tools and Elasticsearch.\nMaintain code, configuration and technical documentation using Git, Jira and Confluence.\nContribute to engineering best practices and continuous improvement across the programme.\nRequirements:\n5+ years of professional software development experience, including hands-on full-stack development.\nStrong practical experience with Java, ideally Java 21, Spring Framework and Spring Boot.\nStrong hands-on experience with React and TypeScript.\nSolid experience in REST API design and integration.\nPractical experience with Apache Kafka and event-driven integrations.\nGood knowledge of relational databases and database interactions.\nExperience with automated testing, JUnit, Git and code-review practices.\nExperience working within Agile/Scrum delivery teams.\nUnderstanding of secure coding and software quality practices.\nAbility to work independently and collaborate effectively within an international, cross-functional team.\nVery good command of English.\nNice to have:\nExperience with microservices and distributed systems.\nExperience with cloud-native application development and containerized environments.\nKnowledge of CI/CD and DevSecOps practices.\nExperience with SonarQube, Fortify, Argo, Rancher and Elasticsearch.\nExperience with performance and scalability optimization.\nExperience working on large-scale platform or integration programmes.\nWhat We Offer:\n Hybrid work you can truly shape - friendly model designed for real work-life balance (max. 2 office days per month, depending on location).\nChoose the cooperation model that fits you - Employment Contract or B2B.\nAttractive compensation package reflecting your expertise and impact, plus annual bonus.\nOpportunity to influence technical decisions, architecture, and delivery standards.\nWork with global clients on complex enterprise-scale projects.\nPrivate medical care and mental health & wellbeing support programs.\nBenefits platform with shopping, cinema, and sports discounts.\nStay active - Multisport + b-active.\nDedicated support for certifications, advanced training, and professional development.\nParticipate in conferences, expert communities, and knowledge-sharing initiatives.\nOpportunities to mentor others and grow into technical leadership or architecture paths.\nGift packages and recognition programs.\nAdditional days off and enhanced experience-based benefits.\nCharity and eco initiatives.\nHere at Atos, diversity and inclusion are embedded in our DNA. Read more about our commitment to a fair work environment for all.\nAtos is a recognized leader in its industry across Environment, Social and Governance (ESG) criteria. Find out more on our CSR commitment.\nChoose your future. Choose Atos.","description_format":"text","description_chars":5455,"description_truncated":false,"requirements":{"experience_years_min":5,"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":["Hybrid work","Professional development"],"hiring_locations":[{"name":"Poland","iso":"PL","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Managed Security","IT Consulting & Digital Transformation","Systems Integrators","High-Performance Computing"],"lifecycle":[{"event":"open","at":"2026-10-27T10:48:35Z"},{"event":"close","at":"2026-11-04T07:39:20Z"}],"visa":[],"liveness":null,"pay":null,"html_url":"https://alion.io/job/atos-full-stack-developer-with-react-java-and-kafka-6-months-contract","json_url":"https://alion.io/job/atos-full-stack-developer-with-react-java-and-kafka-6-months-contract.json","meta":{"generated_at":"2026-11-06T09:41:20Z","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":17578,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-07T00:00:00Z"}},"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":3006},"rest":"https://alion.io/mcp/rest/get_company?id=3006"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fatos-full-stack-developer-with-react-java-and-kafka-6-months-contract"},{"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%2Fatos-full-stack-developer-with-react-java-and-kafka-6-months-contract"},{"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%2Fatos-full-stack-developer-with-react-java-and-kafka-6-months-contract"},{"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/atos-full-stack-developer-with-react-java-and-kafka-6-months-contract\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fatos-full-stack-developer-with-react-java-and-kafka-6-months-contract"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3327578}},{"tool":"search_jobs","arguments":{"company":"atos.net","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3327578},"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. Docs: https://alion.io/developers"}}