Senior Go Backend Developer (f/m/d)

The Supply Integrations team builds and operates the services that ensure every user reward is calculated, verified, and delivered. The team's production surface includes S2S Payout Callbacks (real-time reward notifications with 40+ configurable parameters, secured by per-publisher cryptographic signatures), the Payout Adapter (integration with enterprise partner payment systems handling OAuth2 flows, mTLS, HMAC signatures, and retry logic), and the External Statistics API (aggregating data from Druid, Athena, and DynamoDB into publisher dashboards and daily reports). These are backed by Go microservices communicating over Kafka and SQS, with state managed in DynamoDB and MySQL, processing over 2 million interactions every day. adjoe welcomes applications from talent worldwide and provides relocation support to Hamburg, Germany.

Responsibilities

Build and maintain the Go microservice architecture interfacing with the TypeScript/React frontend to handle 2+ million daily publisher interactions; build pipelines to collect billions of daily API events and aggregate them into the data lake for sub-second querying; optimize queries across DynamoDB, MySQL, Druid, and Athena to reduce API response times; expose transparent, well-documented open APIs to enterprise partners; partner with the Data Science team to translate and integrate machine learning algorithms into the core application, optimizing real-time ad targeting; actively participate in peer code reviews and technical knowledge sharing

Requirements

5+ years of backend development experience; at least 3 years writing Go in production distributed environments; hands-on experience designing asynchronous microservice communication using event buses like Kafka, SQS/SNS, and Kinesis; understanding of database internals and low-level web standards (HTTP protocol, Encoding, Regular Expressions); ability to quickly grasp complex technical topics and applied mathematics; fluent spoken and written English

Nice to have

Hands-on experience with Terraform (Infrastructure as Code); Docker containerization; serverless infrastructure

Benefits

Competitive salary; quarterly team adventures; monthly feasts on the company; up to €7000 for referred friends; discounted city commute; extensive visa & relocation support; convenient hybrid work model; continuous investments in your development; generous vacation days; mental health & wellness benefits