Appodeal is a dynamic US-based product company with a truly global presence.We have offices in Warsaw, Barcelona and Parkland (FL), along with remote team members located around the world.Our company thrives on diversity, collaboration, and innovation, making us a leader in the mobile app monetization space.Why Appodeal?At Appodeal, we’re more than just a company—we’re a team united by a common mission:Help people discover and grow their talents through products that enable successful mobile app businesses.We take pride in our cutting-edge product and our internationally dispersed team of talented professionals.Here’s what we value, and what we hope you do too:- Continuous Learning and Growth: We are passionate about learning, growing personally, and building rewarding careers.- Making an Impact: We are committed to building a history-defining company that leaves a lasting impact on the mobile app industry.- Solving Exciting Challenges: We tackle complex problems every day, supported by a team of world-class professionals and mentors.- Enjoying the Journey: We believe in having fun while working toward our goals.About AppodealAppodeal is a dynamic US-based product company with a truly global presence.We have offices in Warsaw, Barcelona, and Parkland (FL), along with remote team members located around the world.Our company thrives on diversity, collaboration, and innovation, making us a leader in the mobile app monetization space.Why Appodeal?At Appodeal, we’re more than just a company—we’re a team united by a common mission:Help people discover and grow their talents through products that enable successful mobile app businesses.We take pride in our cutting-edge product and our internationally distributed team of talented professionals.Here’s what we value:- Continuous Learning and Growth – We invest in development and long-term careers- Making an Impact – We are building a history-defining company in the mobile industry- Solving Exciting Challenges – Complex, large-scale problems are part of our daily work- Enjoying the Journey – We believe great results come with a positive environmentAbout the RoleWe are looking for a Senior Rust Engineer to join our Barcelona team and contribute to building high-performance, real-time systems powering our ML-driven AdTech platform (Mobile Growth Platform.)In this role, you will work on core backend infrastructure and ML platform components, focusing on low-latency, high-load services that process large-scale traffic in real time.You will play a key role in developing and optimizing systems such as real-time applications, feature stores, user identity services, and custom inference layers, ensuring scalability, reliability, and performance.Responsibilities- Contribute to the development of real-time applications and ML platform components- Build and maintain high-load, low-latency backend services- Work on in-house solutions including:- Feature stores- User identity services- Custom inference layer- ML platform infrastructure- Optimize system performance across on-premise Docker & Kubernetes environments- Design and implement solutions for traffic scaling and system reliability- Collaborate with ML, data, and engineering teams to support production ML systems- Continuously improve system architecture, observability, and efficiencyTech Stack- Languages: Rust, Python- Data & Streaming: Kafka, SQL, Redis, ScyllaDB, Delta Lake, Databricks- Infrastructure: Docker, Kubernetes (on-premise)- Tools: GitHubRequirements- 5+ years of experience in software engineering- Strong proficiency in Rustorproficiency in C/C++/Zig with willingness to transition to Rust- Experience designing and building high-load,



performance-critical systems- Solid understanding of system design, concurrency, and performance optimization- Basic knowledge of machine learning workflows and toolsNice to Have- System programming experience (C, C++, Zig)- Experience in ML engineering / MLOps- Strong Python skills- Familiarity with AdTech standards (OpenRTB, MRAID, VAST)- Experience with WASM / WASI- Background in distributed systems and real-time processing- Location: Barcelona, Spain (office attendance 4 days per week)What We’re Looking For- Autonomous and self-driven engineer with strong ownership mindset- Passion for engineering excellence, performance, and scalability- Interest in ML/AI systems and infrastructure- Ability to work independently and make informed decisions- Strong collaboration and communication skillsWhy Join Us:- Opportunity to work on cutting-edge projects with a general impact in the mobile app industry.- A collaborative and inclusive work culture that values innovation and continuous learning.- Competitive salary, flexible work arrangements, and a comprehensive benefits package.- Professional development opportunities and career growth prospects within a fast-growing company.We appreciate teamwork, critical thinking, independent decision-making, and standing up for oneʼs viewpoint.We are looking for talented engineers who are willing to grow, improve and share our values!With an outstanding product and a mission that excites and inspires, Appodeal offers a unique opportunity to make an impact while being part of an amazing team.Join us and help shape the future of mobile app success!#J-18808-Ljbffr

📌 Senior Rust Engineer (Barcelona)
🏢 Appodeal
📍 Barcelona