Senior Full Stack Engineer - Web + Java
Proximity Works • India
No Relocation
Posted: September 25, 2026
Job Description
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.
- 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
- 7+ years of software engineering experience.
- Strong system-design and architecture experience.
- Experience designing systems for high concurrency, large-scale traffic and high availability.
- Ability to drive complex technical implementations end-to-end.
- Experience mentoring engineers and influencing engineering best practices.
Note: This is a 6-month contractual role.