Senior Go Backend Developer

adjoe is redefining the future of mobile ads. Powered by advanced AI, first-party data and world-class engineers, we've perfected the offerwall experience for monetizing and scaling app publishers with solutions like Playtime and Arcade – now the fastest growing rewarded advertising channel globally – driving incremental engagement, retention, and revenue. At the same time, we're breaking into programmatic advertising with the intelligent bidding system of adjoe Ads.

Together, this ecosystem connects app developers to over 600 million users worldwide for scalable growth. Backed by a $100 million investment from Bertelsmann and operating from offices in Hamburg, Boston, Singapore, and Tokyo, adjoe is defining the next stages of app and ad experience – right now. Join us.

Meet Your Team: Programmatic Supply Services

The Programmatic Supply Services team builds the platform that enables mobile app developers to plug into adjoe's products and manage how they use them. Our goal is to make that experience fast, stable, and straightforward even as we operate at a massive global scale
We work across real-time data processing, reliable Go backend services, public APIs, and intuitive TypeScript/React interfaces. The systems we build handle huge volumes of events from millions of mobile players, turning that data into simple, meaningful insights and smooth workflows.
Joining the team means working on products where clear design, performance, and resilience matter just as much as clean code. You'll help create the tools developers rely on every day to bring adjoe's advertising experiences into their apps with confidence.

• Contribute to the development of our backend written +99% in Go and maintain our microservice architecture used to communicate with our frontend (based on TypeScript React). To do this, you'll use event buses like Kafka, SQS/SNS, etc., in order to have reliable asynchronous microservice communication.
• Work in a community of developers with whom you'll share knowledge and contribute to peer code reviews.
• Continuously search for ways to decrease the API response time for complex queries – we work with a few hundred terabytes of data.
• Work with modern databases such as Druid – but also with MySQL and Redis, where you'll optimize queries and the way we query data to deliver few-millisecond response times.
• Support partners by providing them with raw or aggregated data based on their business needs – we believe in data transparency and well-documented open APIs.
• Be responsible for collecting the billions of daily API events and aggregating them in our Kafka and Kinesis streams with the goal of querying them from the data lake in a matter of seconds.
• Be part of an international English-speaking team dedicated to scaling our adtech platform beyond our hundreds of millions of monthly active users.

• You have worked in software development for 5+ years.
• You have gained 3+ years of experience with Golang in a production environment, preferably in distributed systems.
• You are a technology nerd and are able to get involved in new, complex topics quickly
• Knowledge about databases and a basic understanding of Regular Expressions, HTTP protocol and Encoding
• You have experience working with infrastructure as code (Terraform), Docker, and serverless infrastructure.
• You are open to relocating to Hamburg, Germany

• Invest in Your Future: Regular feedback and our development program support your growth, helping you expand your skill set and achieve your career goals.
• Easy Arrival to adjoe: From signing to settling in Hamburg, we've got you covered. Need a visa? No problem. Ready to build your new life and career at adjoe in Hamburg? We support every ambition—from learning German to a relocation bonus that helps you settle in and make Hamburg feel like home.
• Live Your Best Life, at Work and Beyond: We work in a hybrid setup with 3 core office days, plus flexible working hours. Enjoy 30 vacation days, 3 weeks of remote work per year, and free access to an in-house gym with lots of different fitness classes and mental health support through our Employee Assistance Program (EAP).
• Thrive Where You Work: Enjoy the Alster Lake view from our central office with top-notch equipment, fun open spaces, and a large variety of snacks and drinks.
• Join the Community Participate in regular team and company events, including hackathons and social gatherings. We work together, and we celebrate together, too.