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# Senior Rust Engineer

- **Company:** Appodeal
- **Location:** Barcelona, Spain
- **Contract:** Permanent contract
- **Skills:** C++ (Programming Language), Computer Programming, Distributed Systems, Mobile Application Software, Python (Programming Language), Machine Learning, Performance Tuning, Azure Machine Learning, Software Engineering, Systems Architecture, Real Time Systems, Concurrency, Reliability of Systems, Backend, Low Latency, Machine Learning Operations, Docker
- **Published:** August 23, 2026
- **Apply:** https://www.buscojobs.com.es/senior-rust-engineer-en-barcelona-ID-368661567

## About the Role

Requirements5+ years of experience in software engineering
Strong proficiency in Rust or proficiency 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 tools
Nice to HaveSystem programming experience (C, C++, Zig)
Experience in ML engineering / MLOps
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 ForAutonomous 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 skills

## Description

About 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.ResponsibilitiesContribute to the development of real-time applications and ML platform componentsBuild and maintain high-load, low-latency backend servicesWork on in-house solutions including:Feature storesUser identity servicesCustom inference layerML platform infrastructureOptimize system performance across on-premise Docker & Kubernetes environmentsDesign and implement solutions for traffic scaling and system reliabilityCollaborate with ML, data, and engineering teams to support production ML systemsContinuously improve system architecture, observability, and efficiencyLanguages: Rust, PythonTools: GitHubRequirements5+ years of experience in software engineeringStrong proficiency in Rust or proficiency in C/C++/Zig with willingness to transition to RustExperience designing and building high-load, performance-critical systemsSolid understanding of system design, concurrency, and performance optimizationBasic knowledge of machine learning workflows and toolsNice to HaveSystem programming experience (C, C++, Zig)Experience in ML engineering / MLOpsFamiliarity with AdTech standards (OpenRTB, MRAID, VAST)Experience with WASM / WASIBackground in distributed systems and real-time processingLocation: Barcelona, Spain (office attendance 4 days per week)What We're Looking ForAutonomous and self-driven engineer with strong ownership mindsetPassion for engineering excellence, performance, and scalabilityInterest in ML/AI systems and infrastructureAbility to work independently and make informed decisionsStrong collaboration and communication skillsWhy Join UsOpportunity to work on cutting-edge projects with a global 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 one's 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-*****-Ljbffr


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