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# Full-Stack Engineer

- **Company:** Appodeal
- **Location:** Barcelona, Spain (Remote available)
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), JavaScript (Programming Language), Application Programming Interfaces (APIs), Clojure, Databases, Continuous Integration, Database Queries, DevOps, Java Virtual Machine (JVM), Python (Programming Language), PostgreSQL, Redis, Responsive Web Design, Scala (Programming Language), Systems Architecture, TypeScript, Real Time Systems, ReactJS, Flask (Web Framework), Caching, Backend, Fastapi, Kotlin, Optimization Algorithms, Apache Kafka, Front End Software Development, Vertica, Functional Programming, Api Design, Docker, Microservices
- **Published:** July 21, 2026
- **Apply:** https://www.adzuna.es/contact-us.html

## About the Role

5+ years of full-stack development experience with strong frontend capabilities
Advanced frontend skills: 4+ years with React, modern JavaScript/TypeScript, and responsive design
Backend versatility: Experience with Python plus interest/experience in Rust or JVM languages (Java, Scala, Kotlin, Clojure)
Database expertise: Strong SQL skills with PostgreSQL, ClickHouse, or similar analytical databases
API development: Experience with high-performance HTTP frameworks (FastAPI, Flask, or equivalent in other languages)
Real-time systems: Experience with Kafka, Redis, or similar messaging/caching technologies
DevOps familiarity: Docker, Docker Compose, and CI/CD practices
Performance mindset: Understanding of optimization techniques for both frontend and backend
Communication: Strong English skills for cross-team collaboration
Bonus points:
Experience with ad tech, RTB, or programmatic advertising
Knowledge of functional programming concepts
Experience with time-series databases or analytics platforms
Understanding of microservices architecture

## Description

As a Senior Full-Stack Engineer at Appgrowth, you'll be instrumental in building and scaling our Demand Side Platform (DSP) runtime infrastructure. You'll work on both the performance-critical backend systems and modern frontend interfaces that power our advertising technology platform.
What you'll be doing:
Build and optimize high-performance DSP runtime systems handling real-time bid processing
Develop responsive frontend applications for campaign management and analytics dashboards
Architect and implement APIs connecting frontend interfaces with backend services
Work on performance-critical components requiring low-latency, high-throughput processing
Collaborate on system architecture decisions as we evolve our technology stack
Integrate with external ad exchanges and demand sources
Maintain and improve our existing Python-based UI


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