{"id":2617895,"url":"https://alion.io/job/papaya-senior-backend-engineer","title":"Senior Backend Engineer","company":{"id":2100672,"name":"Papaya","domain":"papaya.com","url":"https://alion.io/company/papaya-com","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Comeet","truth_index":null},"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":60000,"max_usd":101000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":339},"experience_years_min":6,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"Node JS","optional":false},{"name":"AWS","optional":true},{"name":"JavaScript","optional":true},{"name":"Kubernetes","optional":true},{"name":"MySQL","optional":true},{"name":"Redis","optional":true},{"name":"TypeScript","optional":true}],"status":"live","first_seen_at":"2026-10-15T10:41:38Z","employer_posted_date":"2026-10-15","last_verified_at":"2026-10-15T16:11:42Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"Description\nAt Papaya, we believe in the power of play. We create skill-based mobile games that combine fun, competition, and real rewards - enjoyed by millions of players worldwide.\nWe're building a platform where players join tournaments, connect with others, and keep coming back. With a strong focus on innovation, scalability, and user experience, we aim to redefine what mobile gaming can offer.\nWe’re a fast-growing, profitable company with the spirit of a startup - no corporate bureaucracy, no endless layers of approvals. Everyone on the team makes a real impact on the product, and your voice truly matters.\nThe Core R&D group is a key part of Papaya Gaming’s Platform division, responsible for developing and maintaining core products that shape the player’s journey. From registration, account management, payments, and restrictions to tournaments and matchmaking, the team ensures a seamless and scalable gaming experience for millions of players worldwide.\nWe handle payments and fraud prevention across the platform. The team integrates with multiple banking systems, manages secure transactions, and develops fraud detection mechanisms. Supporting millions of players, Typhoon ensures smooth and safe financial operations within Papaya’s ecosystem.\nWe are looking for an experienced Backend Developer to join our Payments & Fraud team and help build high-scale, mission-critical backend solutions. You will work in a fast-paced, highly technical environment, designing and developing scalable, resilient, and high-performance backend services that power the Payments and Fraud ecosystem.\nWe offer a hybrid work model with flexibility at our growing Warsaw office.\nResponsibilities\nDevelop and maintain a high-scale backend platform serving millions of users.\nDesign and implement end-to-end solutions that reduce time-to-market and improve system efficiency.\nWrite high-quality, performant, and maintainable code following industry best practices.\nExperiment with new technologies, tools, and third-party frameworks to drive innovation.\nMentor new team members and contribute to a culture of engineering excellence.\nTech Stack\nAWS, Kubernetes, Node.js, TypeScript, Redis, MySQL\nRequirements\n6+ years of experience in server-side development and architecture.\nHands-on experience in cloud-based architectures and scalable backend systems.\nProficiency in Node.js or another major backend language.\nExperience or strong interest in agentic coding and AI-assisted development tools.\nPassion for learning and adopting new technologies.\nA can-do approach, problem-solving mindset, and ability to work in a fast-paced environment.\nWhat We Offer:\nJoin a profitable company with the heart of a startup - stable, growing, and full of energy.\nEnjoy a hybrid work model with flexibility and a growing Warsaw office.\nReceive competitive compensation tailored to the Polish market - B2B Service agreement\nComfortable office in central Warsaw, equipped with all the necessary tools to conquer the universe\nLuxmed Medical services\nMonthly 'Pyszne.pl' voucher\nMultisport card\nMonthly Happy Hours\nSnacks and Breakfasts","description_format":"text","description_chars":3117,"description_truncated":false,"requirements":{"experience_years_min":6,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Hybrid work"],"hiring_locations":[{"name":"Poland","iso":"PL","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":[],"lifecycle":[{"event":"open","at":"2026-10-15T12:40:10Z"}],"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":23,"reasons":["conf:3","win:early"],"computed_at":"2026-10-15T19:19:04Z"},"pay":null,"html_url":"https://alion.io/job/papaya-senior-backend-engineer","json_url":"https://alion.io/job/papaya-senior-backend-engineer.json","meta":{"generated_at":"2026-10-15T19:19:04Z","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":29150,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-16T00:00:00Z"}},"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":2100672},"rest":"https://alion.io/mcp/rest/get_company?id=2100672"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fpapaya-senior-backend-engineer"},{"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%2Fpapaya-senior-backend-engineer"},{"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%2Fpapaya-senior-backend-engineer"},{"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/papaya-senior-backend-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fpapaya-senior-backend-engineer"}]}