{"id":4026962,"url":"https://alion.io/job/gt-senior-backend-engineer-mobile-monetization-feeld","title":"Senior Backend Engineer (Mobile Monetization) | Feeld","company":{"id":673955,"name":"GT","domain":"gt-hq.com","url":"https://alion.io/company/gt-hq","size_band":"11-50","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"posting_text","remote_working_hours":null,"hiring_geo_confidence":"inferred","locations":[],"countries":[],"hiring_countries":["PL","PT"],"hiring_countries_total":2,"salary":null,"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AWS","optional":false},{"name":"GraphQL","optional":false},{"name":"JavaScript","optional":false},{"name":"Nest.JS","optional":false},{"name":"Node JS","optional":false},{"name":"Rest API","optional":false},{"name":"RevenueCat","optional":false},{"name":"TypeScript","optional":false},{"name":"A/B Testing","optional":true},{"name":"Amazon ECS","optional":true},{"name":"Amazon EventBridge","optional":true},{"name":"DynamoDB","optional":true},{"name":"Google Play Billing","optional":true},{"name":"PostgreSQL","optional":true},{"name":"SQL","optional":true},{"name":"WebSockets","optional":true}],"status":"live","first_seen_at":"2026-11-02T12:33:58Z","employer_posted_date":"2026-11-02","last_verified_at":"2026-11-10T17:18:08Z","board_verified":true,"closed_at":null,"days_open":8,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":8},"description":"GT was founded in 2019 by a former Apple, Nest, and Google executive. GT’s mission is to connect the world’s best talent with product careers offered by high-growth companies in the UK, USA, Canada, Germany, and the Netherlands.\nOn behalf of Feeld, GT is looking for a Senior Backend Engineer to help them improve their inclusive dating application.\nAbout the Client\nFounded in 2014 as a dating app, Feeld gathered millions of users in one place to create a safer and more inclusive space online for everyone open to experiencing people and relationships in a new way. Their mission is to elevate the human experience of sexuality and relationships and create a world where everyone is more intimately connected to each other and themselves.\nThe technology stack of the project: Node.js, NestJS, GraphQL/REST, TypeScript, AWS, DynamoDB, PostgreSQL, SQS, EventBridge, WebSockets.\nAbout the Role\nWe are looking for a Senior Backend Engineer (Mobile Monetisation) to take ownership of the backend systems powering Feeld's subscription and in-app purchase experiences across iOS and Android.\nThe ideal candidate brings strong hands-on experience with mobile monetisation platforms such as Adapty, RevenueCat, or similar solutions, as well as integrating mobile payment flows with custom backend services. This includes managing subscription lifecycles, synchronising payment data, handling receipts, and ensuring accurate entitlement management.\nWe're looking for a highly experienced, proactive engineer with the potential to act as a technical lead, capable of independently driving complex technical initiatives, contributing to architectural decisions, and ensuring the reliability and scalability of revenue-critical systems.\nFull-time, long-term\nPreferred immediate start\nResponsibilities:\nTake ownership of the backend systems supporting Feeld’s monetisation, ensuring their reliability, performance, and contribution to business goals.\n\nDesign, develop, and maintain scalable backend services and integrations for subscriptions, billing, payment processing, entitlements, pricing, and promotional features.\n\nEnsure the accuracy, stability, and reliability of monetisation flows, proactively identifying and resolving production issues that could impact revenue or user experience.\n\nSupport the development and optimisation of subscription and payment flows, including improvements to system performance, scalability, and error handling.\n\nImplement and maintain feature flags, testing, and analytics instrumentation to support experimentation and continuous improvement of monetisation features.\n\nCollaborate with Product, Engineering, and Data teams to build and improve analytics and reporting capabilities, providing insights into revenue performance, user behaviour, and system health.\n\nEssential knowledge, skills & experience:\n5+ years of commercial backend development experience, ideally building high-load, business-critical systems.\n\nProven experience with mobile monetisation and subscription platforms, such as Adapty, RevenueCat, or comparable solutions.\n\nHands-on experience implementing mobile in-app purchases and subscription flows for iOS and/or Android applications, beyond web-based payment integrations.\n\nExperience integrating mobile payment platforms with custom backend systems, including payment data synchronisation, receipt handling, subscription status tracking, and entitlement management.\n\nStrong understanding of mobile subscription and payment lifecycles, including renewals, cancellations, refunds, failed payments, and subscription state changes.\n\nExperience ensuring the accuracy, reliability, and consistency of revenue-critical backend systems, including troubleshooting production issues.\n\nStrong backend development experience with Node.js or TypeScript or JavaScript, ideally using NestJS and building GraphQL or REST APIs.\n\nGood understanding of event-driven architectures, asynchronous processing, and distributed systems.\n\nExperience writing reliable unit and integration tests.\n\nStrong technical ownership, independent problem-solving, and architectural decision-making skills, with the potential to take on technical leadership responsibilities.\n\nStrong communication skills and full professional proficiency in English.\n\nNice to Have\nExperience with AWS cloud infrastructure, SQL and NoSQL databases. Our current stack includes ECS, DynamoDB, SQS, EventBridge, and PostgreSQL.\n\nExperience working directly with Apple App Store and Google Play billing ecosystems.\n\nExperience running monetisation experiments, including A/B testing, subscription pricing changes, and conversion optimisation.\n\nExperience managing regional pricing, multiple currencies, and country-specific monetisation strategies.\n\nExperience analysing the performance of monetisation experiments, including revenue, subscription conversion, and retention metrics.\n\nPrevious experience acting as a Tech Lead or Lead Backend Engineer, mentoring engineers, and driving technical decisions.\n\nInterview Steps\nGT interview with Recruiter\n\nGT technical interview\n\nClient technical interview\n\nFinal interview\n\nReference Check\n\nOffer","description_format":"text","description_chars":5140,"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":"Advanced (C1)","optional":true}]},"benefits":[],"hiring_locations":[{"name":"Poland","iso":"PL","kind":"country"},{"name":"Portugal","iso":"PT","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Mobile Games","Custom Software Development","IT Staffing & Staff Augmentation"],"lifecycle":[{"event":"open","at":"2026-11-10T17:18:08Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":8,"expected_fill_days":27,"reasons":["conf:0","win:early"],"computed_at":"2026-11-10T18:08:42Z"},"pay":null,"html_url":"https://alion.io/job/gt-senior-backend-engineer-mobile-monetization-feeld","json_url":"https://alion.io/job/gt-senior-backend-engineer-mobile-monetization-feeld.json","meta":{"generated_at":"2026-11-10T18:08:42Z","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":7681,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-11T00:00:00Z"}},"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":673955},"rest":"https://alion.io/mcp/rest/get_company?id=673955"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fgt-senior-backend-engineer-mobile-monetization-feeld"},{"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%2Fgt-senior-backend-engineer-mobile-monetization-feeld"},{"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%2Fgt-senior-backend-engineer-mobile-monetization-feeld"},{"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/gt-senior-backend-engineer-mobile-monetization-feeld\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fgt-senior-backend-engineer-mobile-monetization-feeld"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":4026962}},{"tool":"search_jobs","arguments":{"company":"gt-hq.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":4026962},"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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