Senior Full Stack Engineer - Campaign Engine (all genders) Berlin, Germany

About You - Collins GmbH & Co. KG; Berlin; On-site; EUR 90,000 - 130,000; Full time

Job summary

About You - Collins GmbH & Co. KG in Berlin is developing Campaign Engine to enable self-service campaign management for Retail Media Partners, with direct access to AY's loyalty frameworks for Missions & Coupons.

Join a greenfield-like, autonomous engineering environment, shipping features across PHP/Laravel APIs and React UI while balancing high-precision domain logic and production stability.

Qualifications

• Experience shipping full-stack features end-to-end across backend and frontend.
• Strong API design and contract discipline with OpenAPI/TypeSpec.

Responsibilities

• Ship full-stack features end-to-end across PHP/Laravel APIs and React UI components.
• Lead technical feature design and build background jobs, REST endpoints, and MySQL migrations.
• Work on high-precision domain logic covering bidding, budgets, and eligibility for campaigns.
• Keep frontend/backend in sync through strictly typed API contracts (OpenAPI/TypeSpec).
• Own production stability end-to-end, from tests to deployments and alerting.
• Balance engineering rigor on billing and budgets with fast UI iterations.
• Review full-stack code, optimize queries, and leverage AI tools in daily work.
• Partner with Product to break down features and ship in short iterations.

Skills

Full-stack development

PHP Laravel

React UI

REST APIs

OpenAPI

MySQL

AWS

Tools

OpenAPI/TypeSpec

React

AWS ECS

Datadog

Sentry

MySQL migrations

Job description

The Campaign Engine is a completely new product: its mission is to enable self-service campaign management for Retail Media Partners, giving them direct access to AY's unique loyalty frameworks: Missions & Coupons. This creates a compelling opportunity for partners to drive customer acquisition and incremental engagement within AY's existing customer base. Operating within an existing ecosystem, our evolution into specialized product teams provides an autonomous, greenfield-like environment.

• Ship full-stack features end-to-end across PHP/Laravel APIs and React UI components
• Lead technical feature design and build background jobs, REST endpoints, and MySQL migrations
• Work on high-precision domain logic covering CPC bidding, ad budgets, and campaign eligibility
• Keep the frontend and backend synchronized through strictly typed API contracts (OpenAPI/TypeSpec)
• Own production stability end-to-end,from writing automated tests to AWS ECS deployments and Datadog/Sentry alerting
• Balance strict engineering rigor on billing/budget flows with fast iteration on exploratory UI features
• Review full-stack code, optimize queries, and leverage modern AI tools (Cursor, Claude Code) in daily work
• Partner with Product to break down features, estimate effort, and ship in short, agile iterations