Full Stack Engineer (Subscriptions and Payments)
Job Description
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We are looking for strong Full Stack Engineers to work on large-scale systems, serving millions of users across web, mobile, and connected-TV devices.
The role will be part of the Subscriptions and Payments engineering team and will contribute to building Fire TV In-App Purchase (IAP) capabilities, subscription journeys, entitlement workflows, and platform integrations.
You will work on highly scalable consumer-facing systems where performance, reliability, low latency, and seamless user experience are critical, particularly during high-traffic events such as live sports and major content releases.
Responsibilities
- Design, develop, and maintain scalable full-stack applications using Java and modern web technologies.
- Build frontend and backend capabilities supporting subscriptions, payments, and entitlement management.
- Develop responsive, performant user experiences using JavaScript/TypeScript and React or similar frameworks.
- Build and integrate REST APIs and microservices for subscription and payment workflows.
- Work on Fire TV IAP integration, including purchases, renewals, cancellations, and entitlement synchronization.
- Integrate with external payment providers, app stores, and platform APIs.
- Build resilient systems capable of handling large traffic spikes and high concurrent usage.
- Improve application performance, availability, monitoring, and reliability.
- Handle failure scenarios, retries, reconciliation, and user-state consistency across distributed systems.
- Collaborate with backend, frontend, product, and platform teams to deliver features end-to-end.
- Write high-quality, maintainable, and well-tested production code.
- Participate in design reviews, code reviews, and architecture discussions.
Requirements
- Strong experience with Java, Spring Boot, and RESTful services.
- Strong frontend experience with JavaScript/TypeScript, HTML, and CSS.
- Experience with React, Next.js, or similar modern frontend frameworks.
- Strong understanding of microservices and distributed systems.
- Experience building high-scale consumer-facing applications.
- Experience with SQL/NoSQL databases.
- Exposure to caching systems such as Redis.
- Experience with messaging/event-streaming technologies such as Kafka is preferred.
- Experience with cloud platforms such as AWS.
- Familiarity with Docker, Kubernetes, and CI/CD.
- Good understanding of observability, monitoring, and production debugging.
Experience
- 4-7 years of software engineering experience.
- Strong hands-on frontend and backend development experience.
- Ability to independently own and deliver production features.
- Experience working on scalable distributed applications.
Benefits
- Best-in-class salary: We hire strong talent and compensate accordingly.
- Proximity Talks: Meet and learn from designers, engineers, product leaders, and AI practitioners.
- Continuous learning: Work with a world-class team and stay close to the latest in AI, engineering, and product development.
- High-impact work: Build AI-first systems and products used at scale by global clients.
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View Company ProfileProximity is a global digital engineering and software development firm that builds custom cloud, web, and mobile solutions for high-stakes enterprise applications. Operating across media, sports, fintech, and enterprise tech, the company specializes in complex backend engineering, UI/UX design, AI integrations, and real-time data platforms.
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