About ConstructorConstructor is the next-generation platform for search and discovery in ecommerce, built to explicitly optimize for metrics like revenue, conversion rate, and profit. Our search engine is entirely invented in‑house utilizing transformers and generative LLMs, and we use its core and personalization capabilities to power everything from search itself to recommendations to shopping agents. Engineering is by far our largest department, and we’ve built our proprietary engine to be the best on the market, having never lost an A/B test to a competitive technology. We’re passionate about maintaining this and working on the bleeding edge of AI to do so.Our engine is built for extreme scale and powers over 1 billion queries every day across 150 languages and roughly 100 countries. It is used by some of the biggest ecommerce companies in the world, such as Sephora, Under Armour, and Petco.We’re a passionate team who love solving problems and want to make our customers’ and coworkers’ lives better. We value empathy, openness, curiosity, continuous improvement, and are excited by metrics that matter. We believe that empowering everyone in a company to do what they do best can lead to great things.The TeamThe ML Recall team consistently delivers measurable KPI improvements for our customers in search, driving better relevance and user satisfaction. We’re focused on building transparent, reproducible, and scalable data‑intensive workflows—empowering customers with visibility and trust. We own a set of critical high‑load services, ensuring high availability, low latency, and robust performance at scale. As a team, we foster a collaborative,



curiosity‑driven culture where every member has the opportunity to shape the future of search.ResponsibilitiesBuild, deploy, and maintain our search services, including I/O‑bound web services, CPU‑ and GPU‑bound workloads, and data servicesDevelop using AWS CloudFormation, AWS CDK, Jenkins, and GitHub ActionsOptimize system performance—particularly for scaling large ML models efficientlyMaintain and enhance our observability stack, including Prometheus, Grafana, PagerDuty, and AWS CloudWatchCollaborate with both technical and non‑technical stakeholders to design and evolve search functionalityContribute to broader ML improvements across the platformQualificationsExcellent communicator with a passion for performance optimizationExcited to build scalable ML platforms and practical search systemsStrong proficiency in PythonProven experience designing, developing, and maintaining high‑load, distributed, real‑time servicesDemonstrated experience setting up and improving CI/CD pipelinesHands‑on experience with cloud platforms (AWS preferred) and Infrastructure as Code (Terraform, CloudFormation)Proficiency with big data technologies across the end‑to‑end ML product lifecycleSolid experience in server‑side web service development and API designWhat Can Help You Stand OutExperience with Rust or another low‑level programming languageDeep knowledge of data structures,



algorithms, and their trade‑offsBenefits️ Unlimited vacation time – we strongly encourage all of our employees to take at least 3 weeks per yearFully remote team – choose where you live️ Work‑from‑home stipend – we want you to have the resources you need to set up a home officeApple laptops provided for new employeesTraining and development budget for every employee, refreshed each yearMaternity & paternity leave for qualified employeesWork with smart people who will help you grow and make a meaningful impactBase salary range between $80k and $120k USD (varies by experience and interview outcome)Regular team off‑sites to connect and collaborateDiversity, Equity, and Inclusion at ConstructorAt Constructor.Io we are committed to cultivating a work environment that is diverse, equitable, and inclusive. As an equal‑opportunity employer, we welcome individuals of all backgrounds and provide equal opportunities to all applicants regardless of their education, diversity of opinion, race, color, religion, gender, gender expression, sexual orientation, national origin, genetics, disability, age, veteran status, or affiliation in any other protected group.Studies have shown that women and people of color may be less likely to apply for jobs unless they meet every one of the qualifications listed. Our primary interest is in finding the best candidate for the job. We encourage you to apply even if you don’t meet all of our listed qualifications.Referrals increase your chances of interviewing at Constructor by 2×.Get notified about new MLOps: ML Recall team (Remote) jobs in Spain.#J-18808-Ljbffr

📌 Mlops: Ml Recall (Remote) - $80,000 - $120,000 A Year - Remote (Madrid)
🏢 Constructor
📍 Madrid