Senior Full Stack Engineer - Android + Go/Java

Proximity Works; San Francisco, Palo Alto (CA, CA); On-site; USD 170,000 - 210,000; Full time

Job summary

Proximity seeks experienced Full Stack Engineers with Android and backend Go/Java expertise to build and scale Fire TV IAP and subscription capabilities. You’ll work across Android/Fire TV apps and backend services, delivering high-concurrency systems for large events.

Responsibilities include designing Android/Fire TV apps, implementing IAP flows, and building resilient backend services with Kotlin/Java or Go. Join a high-impact team delivering end-to-end features for millions of users.

Qualifications

• Strong hands-on Android development experience with Kotlin/Java.
• Backend experience with Go or Java and Spring Boot.
• Experience designing REST APIs and microservices.
• Familiarity with AWS, Docker, Kubernetes and CI/CD pipelines.
• Knowledge of SQL/NoSQL databases and data modeling.
• Ability to scale systems for high concurrency and traffic spikes.

Responsibilities

• Design, develop and maintain Android / Fire TV applications and backend services.
• Build features using Kotlin/Java with focus on performance and reliability.
• Develop scalable backend services in Go or Java and REST APIs.
• Integrate with payment, subscription and entitlement workflows.
• Implement IAP flows, including purchases, renewals and cancellations.
• Ensure observability, monitoring and troubleshooting across stack.
• Collaborate with cross-functional teams to deliver end-to-end features.

Skills

Android Kotlin/Java

Go/Java backend

REST APIs

Microservices

AWS

Docker/Kubernetes

CI/CD pipelines

Performance optimization

Tools

Spring Boot

Docker

Kubernetes

CI/CD

Job description

We are looking for experienced Full Stack Engineers with Android and backend expertise in Go or Java to work on large-scale systems.

The role will be part of the Subscriptions and Payments engineering team and will contribute to building and enhancing Fire TV In-App Purchase (IAP) capabilities, subscription journeys, payment integrations and entitlement workflows.

You will work across Android/Fire TV applications and backend services, building highly scalable and reliable systems capable of supporting millions of users and significant traffic spikes during major live events.

Responsibilities

• Design, develop and maintain Android / Fire TV applications and supporting backend services.


• Build Android features using Kotlin/Java with a focus on performance, reliability and user experience.


• Develop scalable backend services using Go or Java.


• Build and integrate APIs supporting subscriptions, payments and entitlement workflows.


• Implement Fire TV In-App Purchase (IAP) flows including purchases, renewals, cancellations and entitlement synchronization.


• Integrate applications with app-store APIs, payment platforms and internal backend services.


• Build resilient workflows capable of handling failures, retries and transaction reconciliation.


• Design systems to support high concurrency and large traffic spikes, particularly during live sports and major content releases.


• Optimize application startup, API latency, network usage and overall performance.


• Work on authentication, device management and user-session flows where required.


• Implement monitoring, logging and observability across mobile/TV and backend systems.


• Write maintainable, well-tested production code.


• Participate in architecture discussions, code reviews and technical design reviews.


• Collaborate with Android, backend, platform, payments and product teams to deliver features end-to-end.

• Strong Android development experience using Kotlin and/or Java.


• Good understanding of Android application architecture, lifecycle and performance optimization.


• Experience developing applications for Android TV or Fire TV is highly desirable.


• Strong backend development experience using Go or Java.


• Experience with Spring Boot for Java backend development or common Go web/service frameworks.


• Strong experience designing and consuming REST APIs.


• Good understanding of microservices and distributed systems.


• Experience with SQL databases such as PostgreSQL/MySQL.


• Experience with NoSQL databases is desirable.


• Experience with caching technologies such as Redis.


• Exposure to Kafka or similar messaging/event-streaming technologies.


• Understanding of asynchronous processing, concurrency and distributed transactions.


• Experience with AWS or similar cloud platforms.


• Familiarity with Docker, Kubernetes and CI/CD pipelines.


• Strong debugging and production troubleshooting skills.

Experience

• 4-7 years of software engineering experience.


• Strong hands-on Android development experience.


• Hands-on experience with backend development using Go or Java.


• Ability to independently own and deliver features across application and backend layers.


• Experience working on scalable production applications.

Note: This is a 6-month contractual role.

• 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.

About Us
Proximity is the trusted technology, design, and consulting partner for some of the biggest Sports, Media, and Entertainment companies in the world. We're headquartered in San Francisco and have offices in Palo Alto, Dubai, Mumbai, and Bangalore.
Since 2019, Proximity has built high-impact, scalable products used by millions of users every day. Today, we are a global team of engineers, designers, product managers, and experts solving complex problems and building cutting-edge technology at scale.