{"id":3966659,"url":"https://alion.io/job/obi-backend-engineer-java-kotlin-spring-boot","title":"Backend Engineer (Java, Kotlin, Spring Boot)","company":{"id":2754559,"name":"OBI","domain":"obi.pl","url":"https://alion.io/company/obi-pl","size_band":null,"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":["Katowice, Poland"],"countries":["PL"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":9000,"max":13000,"currency":"PLN","period":"month","gross":null,"usd_annual":39600},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Apache Kafka","optional":false},{"name":"CI/CD","optional":false},{"name":"IAM","optional":false},{"name":"Java","optional":false},{"name":"Kotlin","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Rest API","optional":false},{"name":"Spring Boot","optional":false},{"name":"Amazon EKS","optional":true},{"name":"AWS","optional":true},{"name":"Kubernetes","optional":true}],"status":"live","first_seen_at":"2026-11-09T14:00:44Z","employer_posted_date":null,"last_verified_at":"2026-11-09T14:00:44Z","board_verified":false,"closed_at":null,"days_open":0,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":0},"description":"Responsibilities\nWe are looking for a backend engineer who wants to develop and evolve digital products and services powering OBI PRO, our B2B business for professional customers, craftsman, and businesses within the OBI retail ecosystem.\nYou will contribute to building scalable backend services and integrations that support our B2B customer experience, sales processes, and digital services, working in an event-driven environment. You will collaborate closely with engineers, product owners, and architects to deliver reliable and maintainable solutions.\nYour key responsibilities include:\nDevelop and maintain backend services, APIs, and integrations using Kotlin, Java and Spring Boot.\n\nTranslate business and B2B customer requirements into scalable and maintainable backend solutions.\n\nContribute to event-driven architectures and asynchronous processing using Kafka.\n\nSupport the integration of backend systems within cloud-native and containerized environments.\n\nDesign and maintain data models and persistence layers using PostgreSQL.\n\nCollaborate with product, business, and engineering teams to refine requirements and deliver features.\n\nContribute to code quality, testing, observability, and system reliability.\n\nActively use AI-powered development tools to improve productivity, code quality, and efficiency throughout the software development lifecycle.\n\nBenefits\nMotivizer Benefits Platform to choose and manage all your benefits in one place. You receive a budget (550 PLN monthly). You can choose medical care package, meal tickets, sports cards (we have Multisport and on preferential terms, we have membership cards to one of the most popular Gyms), cinema tickets, shop vouchers, discounts and many more.\n\nLanguage Courses – you'll have access to a multi-language learning platform enabling you to practice your language skills and learn new ones!\n\nRegular and systematic further training opportunities - both internally and from external providers. We support your ongoing learning and development.\n\nCooperation within an internal community is our everyday reality. We have networking events, coding challenges, and company parties for different occasions.\n\nQualifications\n\nCompleted university degree in Computer Science or a comparable technical field. \n\n3–5 years of professional experience in backend development using Kotlin or Java with Spring Boot. \n\nGood understanding of REST APIs, microservices, and distributed systems.\n\nHands-on experience or exposure to Kafka or similar messaging systems.\n\nExperience working with PostgreSQL and designing reliable data models. \n\nFamiliarity with CI/CD, containerization, and basic security concepts (OAuth 2.0, IAM). \n\nStrong communication skills in English and Polish, with readiness to work in a hybrid model in Katowice.\n\nNice to have:\nExperience with AWS and Kubernetes (e.g., Amazon EKS).\n\nExperience with event-driven architectures in production environments.\n\nFamiliarity with observability tools and monitoring practices.\n\nAbout OBI Smart Technologies\n\nWHO ARE WE:\nWe are a joint venture between OBI and Reply Group, responsible for co-designing, building and operating mission-critical digital platforms for commerce, customer service, and omnichannel retail.\nOUR MISSION:\n\"We unite technology leadership with deep retail vision to implement standardized processes and scalable digital products that drive efficient support for one of Europe’s largest DIY retailers. Leveraging proven best practices, we advance the internationalization of products and the digital mindset of our partners, delivering consistent and business-critical solutions to support the targets of our customer.\"\n\nTech stack\nJava\nKotlin\nAWS","description_format":"text","description_chars":3692,"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":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Tools & DIY Supplies","Kitchens, Bathrooms & Home Improvement"],"lifecycle":[{"event":"open","at":"2026-11-09T14:25:00Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":0,"expected_fill_days":30,"reasons":["seen:0","win:early"],"computed_at":"2026-11-09T22:13:31Z"},"pay":{"stated_usd_annual":39600,"is_top_pay":false},"html_url":"https://alion.io/job/obi-backend-engineer-java-kotlin-spring-boot","json_url":"https://alion.io/job/obi-backend-engineer-java-kotlin-spring-boot.json","meta":{"generated_at":"2026-11-09T22:13:31Z","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":11528,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-10T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"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":2754559},"rest":"https://alion.io/mcp/rest/get_company?id=2754559"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fobi-backend-engineer-java-kotlin-spring-boot"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":2,"usd":0.2},"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%2Fobi-backend-engineer-java-kotlin-spring-boot"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"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%2Fobi-backend-engineer-java-kotlin-spring-boot"},{"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/obi-backend-engineer-java-kotlin-spring-boot\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fobi-backend-engineer-java-kotlin-spring-boot"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3966659}},{"tool":"search_jobs","arguments":{"company":"obi.pl","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3966659},"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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