Senior Backend Engineer (Mobile Monetization) | Feeld

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.

On behalf of Feeld , GT is looking for a Senior Backend Engineer to help them improve their inclusive dating application.

About the Client

Founded 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.

The technology stack of the project: Node.js, NestJS, GraphQL/REST, TypeScript, AWS, DynamoDB, PostgreSQL, SQS, EventBridge, WebSockets.

About the Role

We 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.

The 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.

We'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.

📌 Full-time, long-term

⌛️ Preferred immediate start

Responsibilities:

• Take ownership of the backend systems supporting Feeld’s monetisation, ensuring their reliability, performance, and contribution to business goals.

• Design, develop, and maintain scalable backend services and integrations for subscriptions, billing, payment processing, entitlements, pricing, and promotional features.

• Ensure the accuracy, stability, and reliability of monetisation flows, proactively identifying and resolving production issues that could impact revenue or user experience.

• Support the development and optimisation of subscription and payment flows, including improvements to system performance, scalability, and error handling.

• Implement and maintain feature flags, testing, and analytics instrumentation to support experimentation and continuous improvement of monetisation features.

• Collaborate with Product, Engineering, and Data teams to build and improve analytics and reporting capabilities, providing insights into revenue performance, user behaviour, and system health.

Essential knowledge, skills & experience:

• 5+ years of commercial backend development experience , ideally building high-load, business-critical systems.

• Proven experience with mobile monetisation and subscription platforms , such as Adapty, RevenueCat, or comparable solutions.

• Hands-on experience implementing mobile in-app purchases and subscription flows for iOS and/or Android applications, beyond web-based payment integrations.

• Experience integrating mobile payment platforms with custom backend systems , including payment data synchronisation, receipt handling, subscription status tracking, and entitlement management.

• Strong understanding of mobile subscription and payment lifecycles , including renewals, cancellations, refunds, failed payments, and subscription state changes.

• Experience ensuring the accuracy, reliability, and consistency of revenue-critical backend systems , including troubleshooting production issues.

• Strong backend development experience with Node.js or TypeScript or JavaScript , ideally using NestJS and building GraphQL or REST APIs.

• Good understanding of event-driven architectures, asynchronous processing, and distributed systems .

• Experience writing reliable unit and integration tests .

• Strong technical ownership, independent problem-solving, and architectural decision-making skills, with the potential to take on technical leadership responsibilities .

• Strong communication skills and full professional proficiency in English.

Nice to Have

• Experience with AWS cloud infrastructure , SQL and NoSQL databases. Our current stack includes ECS, DynamoDB, SQS, EventBridge, and PostgreSQL.

• Experience working directly with Apple App Store and Google Play billing ecosystems .

• Experience running monetisation experiments , including A/B testing, subscription pricing changes, and conversion optimisation.

• Experience managing regional pricing, multiple currencies, and country-specific monetisation strategies .

• Experience analysing the performance of monetisation experiments, including revenue, subscription conversion, and retention metrics.

• Previous experience acting as a Tech Lead or Lead Backend Engineer , mentoring engineers, and driving technical decisions.

Interview Steps

• GT interview with Recruiter

• GT technical interview

• Client technical interview

• Final interview

• Reference Check

• Offer