Senior Fullstack Engineer (Ad Tech)

TL;DR

Senior Fullstack Engineer (Ad Tech): Building and scaling high-performance Demand Side Platform runtime infrastructure including backend systems and responsive frontend applications with an accent on real-time bid processing, API design, and low-latency, high-throughput performance. Focus on designing and optimizing complex ad tech systems, integrating with external ad exchanges, and evolving system architecture.

Location: Remote with offices in Barcelona, Warsaw, and Virginia

Company

hirify.global is a US-based product company specializing in mobile app monetization with a global presence and a focus on innovation and diversity.

What you will do

• 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 and integrate with external ad exchanges
• Maintain and improve existing Python-based UI

Requirements

• 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 and interest/experience in Rust or JVM languages
• Strong SQL skills with PostgreSQL, ClickHouse, or similar analytical databases
• Experience with high-performance HTTP frameworks (FastAPI, Flask, or equivalent)
• Experience with real-time systems like Kafka, Redis, or similar technologies
• DevOps familiarity including Docker, Docker Compose, and CI/CD practices
• Strong English skills for cross-team collaboration

Nice to have

• 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

Culture & Benefits

• Work with a world-class team of DSP and mobile marketing experts
• Accelerated career growth and high ownership from day one
• Fully remote culture with flexible work hours
• Transparent environment with a strong focus on innovation and impact