Staff Software Engineer (Adtech)

TL;DR

Staff Software Engineer (Adtech): Developing and scaling hirify.global’s mediation backend services with an accent on system architecture, technical direction, and complex feature delivery. Focus on designing high-throughput mediation services, optimizing existing systems for efficiency and reliability, and tackling mission-critical problems in routing and real-time bidding.

Location: Barcelona, Spain

Company

hirify.global is a US-based product company specializing in mobile app monetization, offering ad mediation, analytics, and optimization tools to developers globally.

What you will do

• Lead architecture and implementation of complex backend features using Ruby and Go.
• Drive critical design decisions emphasizing performance, scalability, and maintainability.
• Design, build, and sustain high-throughput mediation services handling millions of requests.
• Improve and optimize existing services for efficiency, reliability, and observability.
• Tackle mission-critical problems in routing, caching, real-time bidding, and API orchestration.
• Mentor mid and senior engineers through code reviews and design discussions.

Requirements

• 6+ years of backend engineering experience.
• Strong expertise in developing web services and concurrent systems in production.
• Deep understanding of distributed systems, microservices, and APIs.
• Experience building high-performance, scalable services with low latency.
• Excellent problem-solving skills and ability to drive complex technical initiatives end-to-end.
• English: B2 required

Nice to have

• Background in ad tech, ad mediation systems, or real-time bidding platforms.
• Experience with Ruby and Go.
• Ruby/Go performance profiling and optimization experience.

Culture & Benefits

• Company thrives on diversity, collaboration, and innovation.
• Focus on continuous learning, personal growth, and career development.
• Committed to making an impact on the mobile app industry.
• Supportive team of world-class professionals and mentors.
• Values autonomy, craftsmanship, and meaningful impact.