Lead Backend Engineer (m/f/d)

Adsquare

Berlin permanent

Posted: January 19, 2026

Required Skills

Job Description

Your Mission:
As a Lead Backend Engineer at Adsquare, you will individually contribute to our products in a cross-functional squad, while leading and mentoring a small team of backend engineers.

Your Profile:
• You like working with people and have experience on a leadership position.

• You bring excellent communication skills and the willingness to actively mentor your team.

• You have significant experience with Java or Kotlin.

• Familiarity with Scala, Python and data pipelines is a big plus.

• You have significant experience in building rest-full services using Spring Boot.

• You have significant experience building cloud native solutions in AWS.

• You have a proven track record of delivering backend heavy software projects from prototype to value generating product.

What you will do:
• Lead and mentor a team of 4-5 backend engineers (60%):

• Build an appreciative and trustworthy connection with each of your team members, fostering their growth and well-being.

• Respond to - and proactively come up with - technology modernization topics with high level of ownership and focus on outcomes.

• Drive cross-squad standards (such as API design patterns, Observability, etc) ensuring technical consistency across the organization.

• Individually contribute with your backend expertise in a cross-functional squad (40%):

• Design and build scalable solutions based on Spring Boot ecosystem.

• Design and build highly scalable solutions in AWS and provision them using Terraform.

• Work closely with data engineers to help them integrate data processing pipelines into our product value chain.

Our Software Stack:
Java and Kotlin, Angular, Spring (Boot, Config, Cloud), AWS (Batch, Lambda, SQS, SNS, Step functions, API Gateway, …), Terraform, MongoDB, PostgreSQL (and PostGIS), RabbitMQ, Kubernetes, GitLab, Gradle

Why us?:
On top of a competitive package…

• We are open to flexible work models: we work on a hybrid mode and remotly
• To encourage education and professional growth, we offer an individual yearly budget of 1.200€
• You are entitled to 30 vacation days per year
• Regular team events and company events organised by our People team (Trust us, they know how to throw a party!)
• We equip you with the latest hardware and provide you with all the tools you need to thrive

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