AgileEngine is an Inc. 5000 company that creates award-winning software for Fortune 500 brands and trailblazing startups across 17+ industries. We rank among the leaders in areas like application development and AI/ML, and our people-first culture has earned us multiple Best Place to Work awards.

WHY JOIN US If you're looking for a place to grow, make an impact, and work with people who care, we'd love to meet you!

ABOUT THE ROLE We are looking for a Senior Backend Engineer to architect and build the core systems of a next-generation AdTech platform that embeds products directly into visual experiences. You will design high-throughput, low-latency services for campaign delivery, targeting, attribution, and partner integrations using Python, Django, Kubernetes, and AWS. This is an early-stage initiative where senior engineers define the technical direction and system architecture from the ground up.

WHAT YOU WILL DO Architect, build, and evolve core systems for the Ads platform

- Design APIs and services supporting campaign management, targeting, delivery, attribution, and reporting
- Build and optimize high-throughput, low-latency systems processing large volumes of events and data
- Own critical systems end-to-end, including design, implementation, deployment, monitoring, and ongoing improvements
- Drive architectural decisions and establish patterns that support scalability, reliability, and developer productivity
- Collaborate closely with product, data, and partner teams to translate business requirements into robust technical solutions
- Provide technical leadership through design reviews, system discussions, and mentoring other engineers
- Contribute to engineering best practices, documentation, and long-term platform vision
- Participate in hiring and help grow a strong, high-performing team. MUST HAVES ~5 years of software development experience building scalable systems (backend programming languages/frameworks, e.g. Java , .NET , Python , Node.js ,



etc.); ~ Experience with AdTech (This may include experience with DSPs, SSPs, ad exchanges, affiliate programs, Prebid.js, Prebid Server, Google Ad Manager, Amazon UAM/TAM, OpenRTB, identity and addressability solutions, as well as ad operations workflows); ~ Deep understanding of computer science fundamentals (algorithms, data structures, networking, databases); ~ Proven experience designing and scaling distributed systems focusing on performance, observability, and fault tolerance; ~ Strong architectural instincts and the ability to make high-leverage technical decisions that impact multiple teams and systems; ~ Demonstrated ability to influence and mentor senior engineers, guide teams through ambiguity, and elevate engineering practices across the board; ~ Exceptional ownership mindset — you drive initiatives forward, raise the bar, and deliver lasting impact; ~ Excellent communication and cross-functional collaboration skills; ~ Availability to work till 1pm EST (till 8 pm Kyiv time); ~ Comfortable operating in a fast-paced, high-autonomy, product-driven environment; ~ Experience with e-commerce and catalog management is preferred; ~ Familiarity with Python , Django , Kubernetes , PostgreSQL , and AWS is strongly preferred, but deep expertise in analogous systems and a willingness to learn are welcome; ~ Upper-intermediate English level. NICE TO HAVES ~ Strong experience with complex ETL flows and high-throughput systems is highly preferred.

PERKS AND BENEFITS Professional growth : Mentorship, TechTalks, and personalized growth roadmaps.

Competitive compensation : USD-based pay with education, fitness, and team activity budgets.

Exciting projects : Modern solutions with Fortune 500 and top product companies.

Flextime : Adaptable schedule with remote and office options.

Meet Our Recruitment Process

Application → Coding Challenge → Video Interview → Technical Interview or Hiring Manager Interview. Each step helps us understand your skills and overall fit. If it's a match, you'll receive an offer.

📌 Senior backend developer - full time (Valencia)
🏢 Cv-Library
📍 Valencia