{"id":3012371,"url":"https://alion.io/job/allegro-software-engineer-2-java-kotlin-search-relevance","title":"Software Engineer 2 (Java / Kotlin) - Search Relevance","company":{"id":1876195,"name":"Allegro","domain":"allegro.eu","url":"https://alion.io/company/allegro-eu","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"SuccessFactors","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"middle","employment_type":null,"work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Warsaw, Poland"],"countries":["PL"],"hiring_countries":["PL"],"hiring_countries_total":1,"salary":{"min":14600,"max":20825,"currency":"PLN","period":"month","gross":null,"usd_annual":64284},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Airflow","optional":false},{"name":"Clean Architecture","optional":false},{"name":"Consul","optional":false},{"name":"Docker","optional":false},{"name":"GCP","optional":false},{"name":"GitHub","optional":false},{"name":"GitHub Actions","optional":false},{"name":"Java","optional":false},{"name":"Kotlin","optional":false},{"name":"Kubernetes","optional":false},{"name":"Machine Learning","optional":false},{"name":"Python","optional":false},{"name":"Semantic Search","optional":false},{"name":"Service Mesh","optional":false},{"name":"Windows","optional":false}],"status":"live","first_seen_at":"2026-10-21T15:38:08Z","employer_posted_date":"2026-10-21","last_verified_at":"2026-10-22T19:23:19Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"description":"About the job:\nIn our domain, we work at the heart of Allegro’s user experience, focusing on what matters most to millions of shoppers every day: search relevance. We are dedicated to ensuring that every search query instantly connects buyers with the best, most accurate offers from a catalog of hundreds of millions of products.\nBuilding and scaling a search engine of this magnitude is a unique engineering challenge rarely found on the market. Our architecture bridges two dynamic worlds: high-performance, low-latency online services built on Java and Kotlin, and an advanced offline processing and Machine Learning ecosystem powered by Python, Apache Airflow, and Google Cloud Platform.\nIn this role, you will work beyond standard backend CRUD services. You will collaborate closely with research and data science teams to deploy ranking models, build automated evaluation pipelines powered by Large Language Models, and experiment with Generative AI and semantic search features. If you are a backend engineer looking to expand your horizons into real-world AI and ML at massive scale, this team offers the perfect launchpad.\nImportant things for you:\nFlexible working hours in the hybrid model (4/1) - working hours start between 7:00 a.m. and 10:00 a.m. We also have 30 days of occasional remote work.\n\nThe salary range for this position depending on the skill set is as follows (contract of employment, tax-deductible cost):\nPLN 14 600 - 20 825\n\nAnnual bonus based on your annual performance and company results.\n\nOur team is based in Warszawa.\n\nWe are looking for people who:\nCode in Java, Kotlin, or Python and have a solid foundation in backend engineering and clean architecture;\n\nAre open to working at the intersection of backend and AI/ML, combining JVM services with modern machine learning pipelines;\n\nCare about code quality, building reliable solutions and actively sharing knowledge during code reviews;\n\nTake an analytical, problem-solving approach to complex challenges affecting millions of active users;\n\nValue continuous growth and are curious to experiment with modern technologies;\n\nCommunicate in English (at least B2 level);\n\nFamiliarity or curiosity about Machine Learning concepts, data pipelines (Python, Airflow, GCP), or experimenting with LLMs and semantic search.\n\nWhat's in it for you:\nWell-located offices (with e.g. fully equipped kitchens, bicycle parking, terraces full of greenery) and excellent work tools (e.g., raised desks, ergonomic chairs, interactive conference rooms).\n\nA 16\" or 14\" MacBook Pro or corresponding Dell with Windows (if you don't like Macs) and all the necessary accessories.\n\nA wide selection of fringe benefits in a cafeteria plan - you choose what you like (e.g., medical, sports or lunch packages, insurance, purchase vouchers).\n\nEnglish classes that we pay for related to the specific nature of your job.\n\nA training budget, inter-team tourism (see more here), hackathons, and an internal learning platform where you will find multiple trainings.\n\nAn additional day off for volunteering, which you can use alone, with a team, or with a larger group of people connected by a common goal.\n\nSocial events for Allegro people - Spin Kilometers, Family Day, Fat Thursday, Advent of Code, and many other occasions we enjoy.\n\nAnd that's just the beginning! You can read more about the benefits here.\n#goodtobehere means that:\nYou will join a team you can count on - we work with top-class specialists who have knowledge- and experience-sharing in their DNA.\n\nYou will love our level of autonomy in team organization, the space for continuous development, and the opportunity to try new things. You get to choose which technology solves the problem and you are responsible for what you create.\n\nYou will value our Developer Experience and the full platform of tools and technologies that make creating software easier. We rely on an internal ecosystem based on self-service and widely used tools such as Kubernetes, Docker, Consul, GitHub, and GitHub Actions. Thanks to this, you can contribute to Allegro from your very first days on the job.\n\nYou will be equipped with modern AI tools to automate repetitive tasks, allowing you to focus on developing new services and refining existing ones (also leveraging AI support).\n\nYou will create solutions that will be used (and loved!) by your friends, family and millions of our customers.\n\nYou will meet the Allegro Scale, which starts with over 1000 microservices, an open-source data bus (Hermes) with 300K+ rps, a Service Mesh with 1M+ rps, tens of petabytes of data, and production-used machine learning.\n\nYou will become part of Allegro Tech - We speak at industry conferences, cooperate with tech communities, run our own blog (it's been over 10 years!), record podcasts, lead guilds, and we organize our own internal conference - the Allegro Tech Meeting. We create solutions we love (and can) to talk about!\n\nSend us your CV and… see you at Allegro!","description_format":"text","description_chars":4966,"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":"Upper-Intermediate (B2)","optional":false}]},"benefits":["Apple Macbook","Cafeteria","Flexible schedule"],"hiring_locations":[{"name":"Poland","iso":"PL","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["E-commerce Platforms","Marketplaces"],"lifecycle":[{"event":"open","at":"2026-10-21T15:38:08Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":0,"expected_fill_days":25,"reasons":["conf:0","velocity","win:early","comp:brand"],"computed_at":"2026-10-22T06:10:10Z"},"pay":{"stated_usd_annual":64284,"is_top_pay":false},"html_url":"https://alion.io/job/allegro-software-engineer-2-java-kotlin-search-relevance","json_url":"https://alion.io/job/allegro-software-engineer-2-java-kotlin-search-relevance.json","meta":{"generated_at":"2026-10-22T22:01:39Z","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":6925,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-23T00:00:00Z"}},"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":1876195},"rest":"https://alion.io/mcp/rest/get_company?id=1876195"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fallegro-software-engineer-2-java-kotlin-search-relevance"},{"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%2Fallegro-software-engineer-2-java-kotlin-search-relevance"},{"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%2Fallegro-software-engineer-2-java-kotlin-search-relevance"},{"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/allegro-software-engineer-2-java-kotlin-search-relevance\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fallegro-software-engineer-2-java-kotlin-search-relevance"}]}