Senior Rust Engineer at Appodeal

<div class="content-intro"><p><strong>Appodeal</strong> is a dynamic US-based product company with a truly global presence.</p> <p>We have offices in <strong>Warsaw, Barcelona and Parkland (FL), </strong>along with remote team members located around the world.</p> <p>Our company thrives on diversity, collaboration, and innovation, making us a leader in the mobile app monetization space.</p> <p><strong>Why Appodeal?</strong></p> <p>At Appodeal, we’re more than just a company—we’re a team united by a common mission: <strong>Help people discover and grow their talents through products that enable successful mobile app businesses!</strong></p> <p>We take pride in our cutting-edge product and our internationally dispersed team of talented professionals.</p> <p>Here’s what we value, and what we hope you do too:</p> <ul> <li><strong>Continuous Learning and Growth:</strong> We are passionate about learning, growing personally, and building rewarding careers.</li> <li><strong>Making an Impact:</strong> We are committed to building a history-defining company that leaves a lasting impact on the mobile app industry.</li> <li><strong>Solving Exciting Challenges:</strong> We tackle complex problems every day, supported by a team of world-class professionals and mentors.</li> <li><strong>Enjoying the Journey:</strong> We believe in having fun while working toward our goals.</li> </ul></div><h3 data-section-id="1yvfssp" data-start="282" data-end="304"><span><strong data-start="286" data-end="304">About Appodeal</strong></span></h3> <p data-start="306" data-end="382">Appodeal is a dynamic US-based product company with a truly global presence.</p> <p data-start="384" data-end="497">We have offices in Warsaw, Barcelona, and Parkland (FL), along with remote team members located around the world.</p> <p data-start="499" data-end="620">Our company thrives on diversity, collaboration, and innovation, making us a leader in the mobile app monetization space.</p> <hr data-start="622" data-end="625"> <h3 data-section-id="meflml" data-start="627" data-end="648"><span><strong data-start="631" data-end="648">Why Appodeal?</strong></span></h3> <p data-start="650" data-end="847">At Appodeal, we’re more than just a company—we’re a team united by a common mission:<br data-start="734" data-end="737"><strong data-start="737" data-end="847">Help people discover and grow their talents through products that enable successful mobile app businesses.</strong></p> <p data-start="849" data-end="958">We take pride in our cutting-edge product and our internationally distributed team of talented professionals.</p> <p data-start="960" data-end="981">Here’s what we value:</p> <ul data-start="983" data-end="1347"> <li data-section-id="1e7790e" data-start="983" data-end="1070"><strong data-start="985" data-end="1019">Continuous Learning and Growth</strong> – We invest in development and long-term careers</li> <li data-section-id="18f0f5a" data-start="1071" data-end="1163"><strong data-start="1073" data-end="1093">Making an Impact</strong> – We are building a history-defining company in the mobile industry</li> <li data-section-id="x5oru" data-start="1164" data-end="1258"><strong data-start="1166" data-end="1197">Solving Exciting Challenges</strong> – Complex, large-scale problems are part of our daily work</li> <li data-section-id="e67tol" data-start="1259" data-end="1347"><strong data-start="1261" data-end="1285">Enjoying the Journey</strong> – We believe great results come with a positive environment</li> </ul> <hr data-start="1349" data-end="1352"> <h3 data-section-id="mprbmu" data-start="1354" data-end="1376"><span><strong data-start="1358" data-end="1376">About the Role</strong></span></h3> <p data-start="1378" data-end="1553">We are looking for a <strong data-start="1399" data-end="1423">Senior Rust Engineer</strong> to join our Barcelona team and contribute to building high-performance, real-time systems powering our ML-driven AdTech platform (<strong>Mobile Growth Platform).</strong></p> <p data-start="1555" data-end="1740">In this role, you will work on <strong data-start="1586" data-end="1644">core backend infrastructure and ML platform components</strong>, focusing on <strong data-start="1658" data-end="1693">low-latency, high-load services</strong> that process large-scale traffic in real time.</p> <p data-start="1742" data-end="1960">You will play a key role in developing and optimizing systems such as <strong data-start="1812" data-end="1907">real-time applications, feature stores, user identity services, and custom inference layers</strong>, ensuring scalability, reliability, and performance.</p> <hr data-start="1962" data-end="1965"> <h3 data-section-id="91yrho" data-start="1967" data-end="1991"><span><strong data-start="1971" data-end="1991">Responsibilities</strong></span></h3> <ul data-start="1993" data-end="2621"> <li data-section-id="9ncv89" data-start="1993" data-end="2081">Contribute to the development of <strong data-start="2028" data-end="2081">real-time applications and ML platform components</strong></li> <li data-section-id="1hr7ue6" data-start="2082" data-end="2146">Build and maintain <strong data-start="2103" data-end="2146">high-load, low-latency backend services</strong></li> <li data-section-id="a0nvos" data-start="2147" data-end="2298">Work on in-house solutions including: <ul data-start="2189" data-end="2298"> <li data-section-id="hui4cw" data-start="2189" data-end="2207">Feature stores</li> <li data-section-id="16mfrvl" data-start="2210" data-end="2236">User identity services</li> <li data-section-id="apdrur" data-start="2239" data-end="2265">Custom inference layer</li> <li data-section-id="18u420h" data-start="2268" data-end="2298">ML platform infrastructure</li> </ul> </li> <li data-section-id="3sdngc" data-start="2299" data-end="2383">Optimize system performance across <strong data-start="2336" data-end="2383">on-premise Docker &amp; Kubernetes environments</strong></li> <li data-section-id="1iedd" data-start="2384" data-end="2463">Design and implement solutions for <strong data-start="2421" data-end="2463">traffic scaling and system reliability</strong></li> <li data-section-id="htaz7p" data-start="2464" data-end="2547">Collaborate with ML, data, and engineering teams to support production ML systems</li> <li data-section-id="1fxyaqj" data-start="2548" data-end="2621">Continuously improve system architecture, observability, and efficiency</li> </ul> <hr data-start="2623" data-end="2626"> <h3 data-section-id="18lsdw2" data-start="2628" data-end="2646"><span><strong data-start="2632" data-end="2646">Tech Stack</strong></span></h3> <ul data-start="2648" data-end="2835"> <li data-section-id="1tuf2wb" data-start="2648" data-end="2679"><strong data-start="2650" data-end="2664">Languages:</strong> Rust, Python</li> <li data-section-id="1l8091u" data-start="2680" data-end="2757"><strong data-start="2682" data-end="2703">Data &amp; Streaming:</strong> Kafka, SQL, Redis, ScyllaDB, Delta Lake, Databricks</li> <li data-section-id="yxjc6v" data-start="2758" data-end="2813"><strong data-start="2760" data-end="2779">Infrastructure:</strong> Docker, Kubernetes (on-premise)</li> <li data-section-id="oa5snw" data-start="2814" data-end="2835"><strong data-start="2816" data-end="2826">Tools:</strong> GitHub</li> </ul> <hr data-start="2837" data-end="2840"> <h3 data-section-id="eu7ne2" data-start="2842" data-end="2862"><span><strong data-start="2846" data-end="2862">Requirements</strong></span></h3> <ul data-start="2864" data-end="3258"> <li data-section-id="1c1ki6k" data-start="2864" data-end="2916">5+ years of experience in <strong data-start="2892" data-end="2916">software engineering</strong></li> <li data-section-id="4l7x1m" data-start="2917" data-end="3030">Strong proficiency in <strong data-start="2941" data-end="2949">Rust</strong><br data-start="2949" data-end="2952"><em data-start="2954" data-end="2958">or</em><br data-start="2958" data-end="2961">proficiency in <strong data-start="2978" data-end="3030">C/C++/Zig with willingness to transition to Rust</strong></li> <li data-section-id="bub3eg" data-start="3031" data-end="3110">Experience designing and building <strong data-start="3067" data-end="3110">high-load, performance-critical systems</strong></li> <li data-section-id="486wt4" data-start="3111" data-end="3196">Solid understanding of <strong data-start="3136" data-end="3196">system design, concurrency, and performance optimization</strong></li> <li data-section-id="550l2w" data-start="3197" data-end="3258">Basic knowledge of <strong data-start="3218" data-end="3258">machine learning workflows and tools</strong></li> </ul> <hr data-start="3260" data-end="3263"> <h3 data-section-id="swvv2e" data-start="3265" data-end="3285"><span><strong data-start="3269" data-end="3285">Nice to Have</strong></span></h3> <ul data-start="3287" data-end="3578"> <li data-section-id="11k1kbj" data-start="3287" data-end="3338">System programming experience (<strong data-start="3320" data-end="3335">C, C++, Zig</strong>)</li> <li data-section-id="kg69kb" data-start="3339" data-end="3383">Experience in <strong data-start="3355" data-end="3381">ML engineering / MLOps</strong></li> <li data-section-id="22dael" data-start="3384" data-end="3412">Strong <strong data-start="3393" data-end="3403">Python</strong> skills</li> <li data-section-id="1s3o0u6" data-start="3413" data-end="3477">Familiarity with <strong data-start="3432" data-end="3475">AdTech standards (OpenRTB, MRAID, VAST)</strong></li> <li data-section-id="ode25b" data-start="3478" data-end="3513">Experience with <strong data-start="3496" data-end="3511">WASM / WASI</strong></li> <li data-section-id="1is3pi" data-start="3514" data-end="3578">Background in <strong data-start="3530" data-end="3578">distributed systems and real-time processing</strong></li> <li data-section-id="1is3pi" data-start="3514" data-end="3578"><strong data-start="3530" data-end="3578"><strong data-start="209" data-end="222">Location:</strong> Barcelona, Spain (office attendance 4 days per week)</strong></li> </ul> <hr data-start="3580" data-end="3583"> <h3 data-section-id="1hr9x9o" data-start="3585" data-end="3615"><span><strong data-start="3589" data-end="3615">What We’re Looking For</strong></span></h3> <ul data-start="3617" data-end="3924"> <li data-section-id="vj3659" data-start="3617" data-end="3686">Autonomous and self-driven engineer with strong ownership mindset</li> <li data-section-id="2xfyp5" data-start="3687" data-end="3759">Passion for <strong data-start="3701" data-end="3757">engineering excellence, performance, and scalability</strong></li> <li data-section-id="17ie7zp" data-start="3760" data-end="3812">Interest in <strong data-start="3774" data-end="3810">ML/AI systems and infrastructure</strong></li> <li data-section-id="47g1eh" data-start="3813" data-end="3874">Ability to work independently and make informed decisions</li> <li data-section-id="1cy9xj1" data-start="3875" data-end="3924">Strong collaboration and communication skills</li> </ul> <p><strong><br>Why Join Us:</strong></p> <ul> <li>Opportunity to work on cutting-edge projects with a global impact in the mobile app industry.</li> <li>A collaborative and inclusive work culture that values innovation and continuous learning.</li> <li>Competitive salary, flexible work arrangements, and a comprehensive benefits package.</li> <li>Professional development opportunities and career growth prospects within a fast-growing company.</li> </ul> <p>We appreciate teamwork, critical thinking, independent decision-making, and standing up for oneʼs viewpoint. <br>We are looking for talented engineers who are willing to grow, improve and share our values!</p><div class="content-conclusion"><p>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.</p> <p><strong>Join us</strong> and help shape the future of mobile app success!</p></div>