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java jobs near berlin, be

Senior Backend Engineer - JVM (Java/Kotlin) & AWS

adsquare GmbH
Berlin

Jetzt bewerben

Details zur Stelle

Festanstellung | Vollzeit
60.000 € – 65.000 € pro Jahr

Qualifikationen

Spring Boot
Cloud-Architektur
Kubernetes
Relationale Datenbanken
NoSQL
MongoDB
Java
Datenbanken
AWS
PostgreSQL
Verteilte Systeme
Scala
Terraform
S3
Spring

Vollständige Stellenbeschreibung

Berlin, External - Poland

Full-time

Permanent employee

60,000 - 65,000 € per year

Intro

At Adsquare, our mission is driven by our core focus:
Passion – Solving complex challenges with great people, tech, and data.
Niche – Location Intelligence for Programmatic Advertisers.

Our core values are integral to everything we do:

Drive: We turn ambition into action.
Resilience: We adapt, persevere, and grow stronger.
No BS: We value honesty, transparency, and clear communication.
Humble: We choose modesty over vanity and let results speak for themselves.
Moral Compass: We do the right thing with fairness, integrity, and respect.

We seek candidates who not only bring top-tier technical expertise but also embody these values in every aspect of their work.

Your Mission

As a Senior Backend Engineer at Adsquare, you will take ownership of designing and operating high-scale distributed systems that power our core data products.

Your primary mission is to build reliable, high-throughput backend services on the JVM that process and serve large volumes of location intelligence data in real time.

You will work in a highly autonomous, cross-functional team and be expected to proactively identify problems, propose solutions, and drive them to production.

In this role, you will:

Design and evolve distributed backend systems with a strong focus on scalability, performance, and reliability
Own services end-to-end: from architecture decisions to production operations
Build and operate cloud-native systems on AWS
Collaborate closely with Product and Data teams to deliver impactful features
Continuously improve system design, engineering practices, and team effectiveness

Your Profile

We are looking for a senior-level engineer with a strong backend and cloud background, who is comfortable owning complex systems in production.

Must have:

4–5+ years of experience building backend systems in production environments
Strong expertise in Java or other JVM-based languages (Kotlin, Scala) and the Spring ecosystem
Proven experience designing and operating distributed systems under real-world load
Hands-on experience with AWS, including designing cloud-native architectures
Strong understanding of concurrency, data consistency, and system reliability
Experience working with PostgreSQL or other relational databases in high-throughput environments
Ability to debug and optimize systems in production (performance, memory, latency)
A proactive approach: you identify problems, take ownership, and drive solutions without close supervision

Nice to have:

Have worked on systems processing large volumes of data or high request throughput
Understand trade-offs between different architectural approaches (e.g. synchronous vs asynchronous processing)
Are comfortable making decisions in ambiguous situations

What you will do

Maintain and evolve existing partner integrations, ensuring reliability and scalability
Design and build new integrations to deliver large-scale data to our partners
Contribute to migrating and adapting services to a cloud-native architecture on AWS
Monitor system health, troubleshoot production issues, and improve overall system stability

Nice to Have

We are particularly interested in candidates who have worked in environments involving:

Data-intensive systems or high-throughput backend services
Cloud-based architectures (especially AWS)
Partner integrations or API-driven systems
Systems evolving from monolithic to distributed or cloud-native architectures

Our Software Stack

Our backend stack is centered around the JVM ecosystem and AWS.

Core technologies:

Java (11+) and Kotlin
Spring / Spring Boot
AWS (e.g. S3, SQS/SNS, Lambda)
PostgreSQL

In our environment, you will also work with:

Infrastructure as Code (Terraform)
NoSQL databases (e.g. MongoDB)
Container orchestration (Kubernetes)
Data processing tools (e.g. Athena, Glue, Batch, Step Functions)

We do not expect prior experience with all of the above, but you should be comfortable working with modern cloud infrastructure and data-intensive systems.

Salary Range (Annual On-Target Earnings)

Yearly compensation: 60,000 - 65,000 € per year

Recruiting Process

For technical roles (Data, Engineering, and Product), candidates are encouraged to upload any technical certifications referenced in their CV via the "Other Documents" section of the application form.
Alternatively, certification documents may be submitted after the first technical interview. Any certifications listed on the CV must be provided and successfully validated before proceeding to the second technical interview stage.

Our hiring process is transparent, focused, and respectful of your time:

Intro & Values Conversation – Getting to know each other, discussing experience, and aligning expectations
Technical Interviews – Backend fundamentals and system design discussions
Final Step – Team meeting followed by decision and offer

Work model

Remote

About us

Adsquare is the global audience & location intelligence company making marketing a whole lot smarter.

With eight offices around the world we are a truly international company but one united team working towards our vision: empowering companies to accelerate business growth by staying at the forefront of data-driven marketing.

We are pioneers in advertising and data. We were born mobile, before it was a necessity, and have pioneered data-driven advertising in display and now DOOH. We have the smartest people, working with the best tech, so we can drive the pace of change.

We are visionaries. We see a better way for marketers and are doing everything we can to make that a reality. We believe in innovation and the power of technology. We believe in constantly improving what we’re doing because the work is never done.

We believe in what we do and rise to meet our own high standards. If there’s a problem, we fix it, humbly and without fuss or delay. Although our technology is best-of-breed, we are unassuming and modest in our approach.

We are passionately candid, both with each other and with our clients. We take the time to explain our approach to their problem, confident there is nothing to hide.

We are consistent and true to our word. We don’t take shortcuts but focus on being our clients’ most reliable partner. We make promises - and we keep them. As a result, clients enjoy spending time with us, because we are good people.

Jetzt bewerben

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