MLOps Engineer

About this job

<p>Wallapop is a Barcelona based scale-up driven by the purpose to empower people to embrace a more conscious and human way of consumption. We believe in a world where collaborative economy is mainstream. This is what drives us. <span style="color: rgba(0, 0, 0, 0.9); font-family: -apple-system, system-ui, 'system-ui', 'Segoe UI', Roboto, 'Helvetica Neue', 'Fira Sans', Ubuntu, Oxygen, 'Oxygen Sans', Cantarell, 'Droid Sans', 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Lucida Grande', Helvetica, Arial, sans-serif; font-size: 14px; font-style: normal; font-weight: 400; letter-spacing: normal; text-align: start; word-spacing: 0px; white-space: normal; display: inline !important; float: none;">💫</span></p>
<p>Wallapop operates in Spain, Italy and Portugal, offering a catalogue of several hundreds of millions of products and services. Powered by technical innovation and continuous improvement, we bring together the scale & trust of classifieds with the marketplace’s convenience & reach. <span style="color: rgba(0, 0, 0, 0.9); font-family: -apple-system, system-ui, 'system-ui', 'Segoe UI', Roboto, 'Helvetica Neue', 'Fira Sans', Ubuntu, Oxygen, 'Oxygen Sans', Cantarell, 'Droid Sans', 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Lucida Grande', Helvetica, Arial, sans-serif; font-size: 14px; font-style: normal; font-weight: 400; letter-spacing: normal; text-align: start; word-spacing: 0px; white-space: normal; display: inline !important; float: none;">🌱 </span>Our mission is to enable a connected trade ecosystem, making 2nd-hand the norm through smart use of technology.</p>
<p> </p>
<p><strong><span data-markdown-start-index="613">The Challenge 🧩</span></strong></p>
<p><span data-markdown-start-index="633">Wallapop generates billions of data points daily. With a mature data infrastructure already in place, our Data Science and Machine Learning area is gaining significant momentum. As we scale, we face the exciting challenge of taking our ML Platform to the next level to support complex solutions in Personalization, Search, Trust & Safety, and Logistics. As an </span><strong><span data-markdown-start-index="995">ML Engineer (MLOps)</span></strong><span data-markdown-start-index="1016">, you will contribute to the evolution of our ML Platform and MLOps practice. You will partner with Data Scientists, Data Engineers, and DevOps to collaborate on a vision that balances innovation with reliability, ensuring our models scale efficiently to serve millions of users.</span></p>
<p> </p>
<p><strong><span data-markdown-start-index="1300">What You Will Do 👇</span></strong></p>
<ul>
<li>
<p><span data-markdown-start-index="1324">Iterate and maintain Wallapop’s ML Platform, identifying opportunities to improve speed, reliability, and maintainability. You will help execute the long-term vision and roadmap for MLOps.</span></p>
</li>
<li>
<p><span data-markdown-start-index="1514">Work hand-in-hand with Data Scientists to support their efforts, ensuring they have the tooling to develop, deploy, and monitor scalable models efficiently.</span></p>
</li>
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<p><span data-markdown-start-index="1672">Adopt and promote engineering best practices (coding standards, testing, CI/CD) within the ML domain.</span></p>
</li>
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<p><span data-markdown-start-index="1775">Partner with Data Engineering and DevOps to align ML development with company-wide infrastructure and data governance standards.</span></p>
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<li>
<p><span data-markdown-start-index="1905">Investigate and integrate new frameworks and tools (e.g., for LLMs or real-time inference) to keep our stack modern and effective.</span></p>
</li>
</ul>
<p> </p>
<p><strong><span data-markdown-start-index="2040">What We’re Looking For 🔎</span></strong></p>
<ul>
<li>
<p><span data-markdown-start-index="2070">Solid experience contributing to and maintaining production-ready ML platforms and pipelines. You understand the lifecycle from experimentation to monitoring.</span></p>
</li>
<li>
<p><span data-markdown-start-index="2230">Solid understanding of </span><strong><span data-markdown-start-index="2255">AWS</span></strong><span data-markdown-start-index="2260"> components (SageMaker, Lambda, S3) and container orchestration with </span><strong><span data-markdown-start-index="2331">Kubernetes</span></strong><span data-markdown-start-index="2343">.</span></p>
</li>
<li>
<p><span data-markdown-start-index="2346">Strong software engineering background with proficiency in </span><strong><span data-markdown-start-index="2407">Python</span></strong><span data-markdown-start-index="2415">, Git, and CI/CD workflows. You write robust, testable code.</span></p>
</li>
<li>
<p><span data-markdown-start-index="2477">Experience with real-time ML architectures, leveraging tools like </span><strong><span data-markdown-start-index="2545">Kafka</span></strong><span data-markdown-start-index="2552"> for low-latency ingestion and inference.</span></p>
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<p><span data-markdown-start-index="2595">Hands-on experience with vector databases or semantic search infrastructure (e.g., OpenSearch, Vertex AI), including indexing and retrieval tuning.</span></p>
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<p><span data-markdown-start-index="2744">Familiarity with the broader ML toolkit, such as orchestration/tracking tools (Flyte, MLFlow, Feast) and standard libraries (Pandas, Scikit-learn, TensorFlow/PyTorch).</span></p>
</li>
<li>
<p><span data-markdown-start-index="2913">Professional proficiency in </span><strong><span data-markdown-start-index="2943">English</span></strong><span data-markdown-start-index="2952">, with the ability to communicate technical concepts clearly to diverse stakeholders.</span></p>
</li>
</ul>
<p> </p>
<p><strong><span data-markdown-start-index="3042">What Would Be A Plus 🚀</span></strong></p>
<ul>
<li>
<p><span data-markdown-start-index="3070">Hands-on experience working with LLMs, RAG architectures, and libraries like LangChain or LlamaIndex.</span></p>
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<p><span data-markdown-start-index="3173">Familiarity with Big Data technologies like Spark or Beam.</span></p>
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<p><span data-markdown-start-index="3233">Experience with Data Engineering tools such as Airflow, dbt, or Datahub.</span></p>
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<li>
<p><span data-markdown-start-index="3307">Experience with other cloud platforms like GCP or Azure in addition to AWS.</span></p>
</li>
</ul>
<p> </p>
<p>Do note that all our jobs are <span style="color: rgba(0, 0, 0, 0.9); font-family: -apple-system, system-ui, 'system-ui', 'Segoe UI', Roboto, 'Helvetica Neue', 'Fira Sans', Ubuntu, Oxygen, 'Oxygen Sans', Cantarell, 'Droid Sans', 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Lucida Grande', Helvetica, Arial, sans-serif; font-size: 14px; font-style: normal; font-weight: 400; letter-spacing: normal; text-align: start; word-spacing: 0px; white-space: normal; display: inline !important; float: none;">📍 </span>Barcelona based. We follow a hybrid model where flexibility rules. We commit to a minimum of 6 days per month in the office. Each team self-organizes to decide on cadence and in-person/remote rituals.</p>
<p>Wallapop is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees as we want Wallapop to be a place for everyone.</p>
<p>Additionally to the opportunity to contribute to an agile product set up and work together towards achieving our meaningful mission, we offer the following <span style="color: rgba(0, 0, 0, 0.9); font-family: -apple-system, system-ui, 'system-ui', 'Segoe UI', Roboto, 'Helvetica Neue', 'Fira Sans', Ubuntu, Oxygen, 'Oxygen Sans', Cantarell, 'Droid Sans', 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Lucida Grande', Helvetica, Arial, sans-serif; font-size: 14px; font-style: normal; font-weight: 400; letter-spacing: normal; text-align: start; word-spacing: 0px; white-space: normal; display: inline !important; float: none;">🍭 </span><strong data-redactor-tag="strong">Perks & Benefits</strong>:</p>
<ul>
<li>Generous individual learning budget of 2k per year</li>
<li>Free office meals, lunch selection from different providers</li>
<li>Group and individual English, Catalan & Spanish lessons as part of our working day</li>
<li>Private Health Insurance with Alan</li>
<li>Flexible working hours + intensive Fridays</li>
<li>Flexible remuneration to deduct from gross salary (kindergarten/food/transport check)</li>
<li>Gym & Wellness plan, including physiotherapist in the office</li>
<li>Generous referral Program & Charity Donation</li>
<li>Bonus for weddings & newborns</li>
<li>Wallapop Renta (Tax income support)</li>
<li>Monthly plan for free shipping, bumps & home-pick-up on our services</li>
<li>Work anniversary Gifts and Birthday Surprises</li>
<li>Contribution towards your WIFI in your monthly payroll</li>
<li>One-off payment based on compensation package to go towards setting up your home office</li>
<li>Relocation package (monetary support and legal advice) and visa sponsorship, if applicable</li>
<li>26 holidays per year</li>
<li>TOP hardware of your choice (latest Apple or Windows)</li>
</ul>
<p> </p>
<p>What does<strong data-redactor-tag="strong"> the hiring process </strong>for this position look like? <span style="color: rgba(0, 0, 0, 0.9); font-family: -apple-system, system-ui, 'system-ui', 'Segoe UI', Roboto, 'Helvetica Neue', 'Fira Sans', Ubuntu, Oxygen, 'Oxygen Sans', Cantarell, 'Droid Sans', 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Lucida Grande', Helvetica, Arial, sans-serif; font-size: 14px; font-style: normal; font-weight: 400; letter-spacing: normal; text-align: start; word-spacing: 0px; white-space: normal; display: inline !important; float: none;">👀 </span><em>**Please, note that all interviews take place remotely over hangouts.**</em></p>
<ul>
<li><strong data-stringify-type="bold">Intro Call</strong> - run by Talent Acquisition, focus on providing more information about the role and the company as well as going over your experience, motivation, and expectations. This usually takes 45-60 minutes.</li>
<li><strong data-stringify-type="bold">Case Study</strong> - you will be working in a case study to assess the technical skills required for the role. </li>
<li><strong data-stringify-type="bold">Expertise Interview</strong> - run by the core team, focusing on the hard skills and the ability to deliver in a given context. This usually takes 60-90 minutes.</li>
<li><strong data-stringify-type="bold">Stakeholder Interview</strong> - run by the hiring team and relevant stakeholders, focus on the ability to collaborate & deliver in a cross-functional set-up. This usually takes 60 minutes.</li>
<li><strong data-stringify-type="bold">Culture-Add Interview</strong> - run by culture interviewers, focus on adherence to Wallapop's purpose and business proposition. This usually takes 60 minutes.</li>
<li><strong data-stringify-type="bold">Offer </strong>- should you be the right candidate, your offer will be discussed over a call with talent acquisition and will then be confirmed in writing.</li>
</ul>