Senior Full Stack Engineer (m/f/d)

October 19, 2026

Hybrid

Senior

Berlin, Germany

Also worth knowing

Includes on-call duty

Description

A global mobile growth platform (NASDAQ: APPS) unifies the mobile ecosystem by connecting advertisers, app developers, and device partners into a personalized value exchange. The company runs on small autonomous pods that own an outcome and a roadmap end to end, hiring engineers rather than language specialists. The Senior Full Stack Engineer builds marketplace product surfaces — campaign management, unified dashboards and reporting, audience and asset tooling, and connecting APIs — working across front-end, back-end, and data on the FY27 roadmap. The platform requires heavy back-end engineering, low-latency optimization, and algorithmic problem-solving to manage massive throughput and real-time marketplace dynamics.

Gender markers in the title: (m/f/d)

In accordance with European anti-discrimination legislation, this job is open to all candidates

Mmale

Ffemale

Ddiverse

Responsibilities

Design and build full-stack features, from responsive web front-ends to back-end services and APIs, powering campaign management, reporting, and marketplace optimization
Choose the right language and tools for each problem within a polyglot stack
Keep the front end lightweight by pushing complex computational logic, data modeling, and heavy algorithmic weight into robust, scalable back-end services
Build and consume well-designed APIs that integrate products into a unified architecture rather than isolated silos
Own services in production: testing, observability, performance, and on-call, treating quality as a whole-team responsibility
Collaborate directly with product leads and stakeholders, contributing to scoping, estimation, and technical decisions within the pod
Mentor teammates and raise engineering standards through code review, automation, and pragmatic architecture

Requirements

8+ years building and shipping production platforms, with heavy skew toward backend architecture, system design, and code optimization
Strong algorithmic fundamentals, data structures, and a proven track record of solving complex data-processing or resource optimization problems
Demonstrated ability to be effective in more than one language or ecosystem such as TypeScript/JavaScript, Java, Kotlin, Python, Go, Scala, or C++
Solid command of modern front-end frameworks such as React plus back-end service design
Experience with relational and/or distributed data stores like MySQL and PostgreSQL
Strong fundamentals in API design, data modeling, testing, and system design
Comfort operating in a fast-paced, agile, ownership-driven environment with limited hand-holding
Nice to have: experience with cloud platforms (AWS or GCP), containers, and CI/CD
Nice to have: exposure to AdTech, dashboards/BI surfaces, or high-throughput data-driven products
Nice to have: experience integrating ML or data services into product workflows