Senior Go Backend Developer (Core Team) (f/m/d)

adjoe is a leading mobile ad platform developing cutting-edge advertising and monetization solutions that take its app partners’ business to the next level. Part of the applike group ecosystem, adjoe is home to an advanced tech stack, powerful financial backing from Bertelsmann, and a highly motivated workforce to be reckoned with.

Meet Your Team: Core & Integrations Team (part of the Demand Solutions team)

The Demand Solutions department builds the core technologies to help mobile publishers acquire the right users for their apps and games. The team is proud that adjoe’s software – developed 100 percent in-house – manages, provides, and analyzes advertisements for more than 200 million daily mobile users.

adjoe’s Demand Solutions department builds modern user interfaces and software and powers its analytics in the dashboard with state-of-the-art databases like Druid. All to give advertisers and account managers the insights they need. The team provides statistical data via a dashboard in order to supply our partners with valuable insights. For this we leverage machine learning models built by our BI analysts and data scientists.

Besides delivering high standards, Demand Solutions remains flexible and autonomous from adjoe’s other tech teams. To develop new platform features fast, this versatile team works on adjoe’s Go backend, which feeds data to the TypeScript React frontend.

As part of the Demand Solutions team, the Core & Integrations team is responsible for core logic of our advertising platform: campaign distribution to find the best combination of advertising campaigns for end users, campaign management API to optimize existing advertising campaigns and some other smaller API products.

The Core & Integrations team also handles integrations with our external partners like our attribution partners – MMPs (Appsflyer, Adjust, etc.) or aggregators working with the advertisers using our platform.

What You Will Do:

• Contribute to the development of our backend written 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 and SQS/SNS 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.
• 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.
• Collaborate with our Data Science team to solve complex math problems used to optimize our ML algorithms that are dedicated to delivering the right ads to the right users and integrate their solutions into adjoe’s application.
• 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.

Who You Are:

• You have worked in software development for 5+ years
• You have gained profound experience with building web applications in Go for at least 3 years.
• You also know how work effectively with key-value databases (Redis, DynamoDB) and to optimize their use for high-volume traffic
• You know how to profile a go application and figure out bottlenecks and have used this already in your work to optimize the code of the application
• You have experience working with infrastructure as code (Terraform), Docker, and serverless infrastructure
• You have worked on a large go application with a considerable amount of traffic
• You are open to relocating to Hamburg, Germany
• You communicate confidently and fluently in English (spoken and written), as it is the working language of our international team

Fuel for the Journey: Benefits to Support Your Ambitions

• 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 make Hamburg feel like home.
• Live Your Best Life, at Work and Beyond: We work in a hybrid setup with core office days on Monday, Tuesday, and Thursday, 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.

Skip writing cover letters. Tell us about your most passionate personal project, your desired salary and your earliest possible start date. We are looking forward to your application!

We welcome applications from people who will contribute to the diversity of our company.

Believe in better adtech and build it. That’s the adjoe manifesto. Our investment is powered by media giants Bertelsmann. Our brains are powered by our love for a challenge. Our mission is powered by building better and bolder ad technologies. And our home is in Hamburg, Germany – in the applike group. Interested in joining our growing international team?