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# Senior Rust Engineer

- **Company:** Appodeal
- **Location:** Laza, Spain
- **Contract:** Permanent contract
- **Skills:** C++ (Programming Language), Computer Programming, Distributed Systems, Github, Mobile Application Software, Python (Programming Language), Machine Learning, Performance Tuning, Redis, Azure Machine Learning, Software Engineering, SQL Databases, Data Streaming, Systems Architecture, System Programming, Real Time Systems, Concurrency, Reliability of Systems, Backend, Data Lakes, Kubernetes, Low Latency, Apache Kafka, Machine Learning Operations, Docker, Databricks
- **Published:** September 7, 2026
- **Apply:** https://www.buscojobs.com.es/senior-rust-engineer-en-laza-ID-369824261

## About the Role

5+ 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 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, 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 skills

## Description

Appodealis a dynamic US-based product company with a truly global presence.We have offices inWarsaw, 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 careersMaking an Impact- We are building a history-defining company in the mobile industrySolving Exciting Challenges- Complex, large-scale problems are part of our daily workEnjoying the Journey- We believe great results come with a positive environmentAbout the RoleWe are looking for aSenior Rust Engineerto 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 oncore backend infrastructure and ML platform components, focusing onlow-latency, high-load servicesthat process large-scale traffic in real time.You will play a key role in developing and optimizing systems such asreal-time applications, feature stores, user identity services, and custom inference layers, ensuring scalability, reliability, and performance.ResponsibilitiesContribute to the development ofreal-time applications and ML platform componentsBuild and maintainhigh-load, low-latency backend servicesWork on in-house solutions including:Feature storesUser identity servicesCustom inference layerML platform infrastructureOptimize system performance acrosson-premise Docker & Kubernetes environmentsDesign and implement solutions fortraffic scaling and system reliabilityCollaborate with ML, data, and engineering teams to support production ML systemsContinuously improve system architecture, observability, and efficiencyTech StackLanguages:Rust, PythonData & Streaming:Kafka, SQL, Redis, ScyllaDB, Delta Lake, DatabricksInfrastructure:Docker, Kubernetes (on-premise)Tools:GitHubRequirements5+ years of experience insoftware engineeringStrong proficiency inRustorproficiency inC/C++/Zig with willingness to transition to RustExperience designing and buildinghigh-load, performance-critical systemsSolid understanding ofsystem design, concurrency, and performance optimizationBasic knowledge ofmachine learning workflows and toolsNice to HaveSystem programming experience (C, C++, Zig)Experience inML engineering / MLOpsStrongPythonskillsFamiliarity withAdTech standards (OpenRTB, MRAID, VAST)Experience withWASM / WASIBackground indistributed 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 forengineering excellence, performance, and scalabilityInterest inML/AI systems and infrastructureAbility to work independently and make informed decisionsStrong collaboration and communication skillsWhy Join Us:Opportunity 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 usand help shape the future of mobile app success!


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