Staff Machine Learning Platform/Ops Engineer

We power people’s progress.At Preply, we’re all about creating life-changing learning experiences. We help people discover the magic of the perfect tutor, craft a personalised learning journey, and stay motivated to keep growing. Our approach is human-led, tech-enabled - and it’s creating real impact.We’ve just reached unicorn status with a $150M Series D, accelerating our vision to transform education through human-led, AI-enhanced learning. Today, 100,000+ tutors teach 90+ languages to learners in 180 countries - and we’re only getting started. As a category-defining company, we’re shaping what the future of learning looks like at global scale.Every Preply lesson sparks change, fuels ambition, and drives progress that matters. Joining Preply means helping define the future of education at global scale, and building something that truly matters for millions of people, every day.About the roleWe’re hiring aStaff ML & Data Engineerto own and evolve Preply’s ML platform. You will design the systems that enable our ML teams to move from research to production seamlessly - at scale, across clouds, and with minimal friction.This role blends strategic platform architecture with deep hands-on engineering. You’ll partner with Engineering and ML leadership to define standards, introduce new tooling, and eliminate barriers to deploying reliable, cost-efficient, and observable ML systems.We’ve reached 90%+ adoption of AI coding tools across engineering, and we’re now moving towards more autonomous, AI-Augmented development at scale. At Preply, engineers have direct access to the best tools available, with the freedom to use them fully and experiment as they build.Your missionLead the design and implementation of Preply’sML platform architecture: from experiment tracking and artifact management to scalable model deploymentDrive cloud-native solutions for distributed training and inference, includingGPU-based training environments, autoscaling, and rollout strategiesOwn technical direction forCI/CD for ML, incorporating testing, validation, and performance checks into every deployment pipelineEmbed observability best practices across ML workflows: metrics, alerts, drift detection, lineageAct as a multiplier across engineering: mentoring, influencing standards, and de-risking complex technical decisionsPartner with ML Leads and Product teams to align platform direction with experimentation velocity, cost-efficiency, and user impactDesign and lead building ML services are modular, testable, and monitored from day oneContribute to LLM platform capabilities, including RAG pipelines, latency-optimized inference, and prompt experimentation frameworksWhat we’re looking for8+ years of engineering experience in large-scale Data/ML platforms, with proven ability to architect and scale production-grade systems supporting dozens of ML use casesDeep knowledge of cloud services and strong understanding of end-to-end ML workflows, including versioning, monitoring, and performance benchmarkingExperience with working with scientists and building enabling tools for them.Excellent communication and influence across cross-functional teams; motivated by product impact. Mentoring and coaching ML engineers.Familiarity with LLM frameworks (LangChain, LlamaIndex), vector stores, and retrieval infrastructureDeep, hands-on expertise in AI tools, especially in agentic AI SDLCWhy you’ll love it at PreplyAn open, collaborative, dynamic and diverse culture;A generous monthly allowance for lessons onPreply.com, Learning & Development budget and time off for your self-development;A competitive financial package with equity, leave allowance and health insurance;Access to free mental health support platforms;The opportunity to unlock the potential of learners and tutors through language learning and teaching in 175 countries (and counting!)#LI-VL1Our PrinciplesCare to change the world- We are passionate about our work and care deeply about its impact to be life changing.We do it for learners- For both Preply and tutors, learners are why we do what we do. Every day we focus on empowering tutors to deliver an exceptional learning experience.Keep perfecting- To create an outstanding customer experience, we focus on simplicity, smoothness, and enjoyment, continually perfecting it as every detail matters.Now is the time- In a fast-paced world, it matters how quickly we act. Now is the time to make great things happen.Disciplined execution- What makes us disciplined is the excellence in our execution. We set clear goals, focus on what matters, and utilize our resources efficiently.Dive deep- We leverage business acumen and curiosity to investigate disparities between numbers and stories, unlocking meaningful insights to guide our decisions.Growth mindset- We proactively seek growth opportunities and believe today’s best performance becomes tomorrow’s starting point. We humbly embrace feedback and learn from setbacks.Raise the bar- We raise our performance standards continuously, alongside each new hire and promotion. We build diverse and high-performing teams that can make a real difference.Challenge, disagree and commit- We value open and candid communication, even when we don’t fully agree. We speak our minds, challenge when necessary, and fully commit to decisions once made.One Preply- We prioritize collaboration, inclusion, and the success of our team over personal ambitions. Together, we support and celebrate each other’s progress.Diversity, Equity, and InclusionPreply.comis committed to creating an inclusive environment where people of diverse backgrounds can thrive. We believe that the presence of different opinions and viewpoints is a key ingredient for our success as a multicultural Ed-Tech company. That means that Preply will consider all applications for employment without regard to race, color, religion, gender identity or expression, sexual orientation, national origin, disability, age or veteran status.

8+ years of engineering experience in large-scale Data/ML platforms, with proven ability to architect and scale production-grade systems supporting dozens of ML use cases Deep knowledge of cloud services and strong understanding of end-to-end ML workflows, including versioning, monitoring, and performance benchmarking Experience with working with scientists and building enabling tools for them. Excellent communication and influence across cross-functional teams; motivated by product impact. Mentoring and coaching ML engineers. Familiarity with LLM frameworks (LangChain, LlamaIndex), vector stores, and retrieval infrastructure Deep, hands-on expertise in AI tools, especially in agentic AI SDLC

An open, collaborative, dynamic and diverse culture; A generous monthly allowance for lessons on Preply.com , Learning & Development budget and time off for your self-development; A competitive financial package with equity, leave allowance and health insurance; Access to free mental health support platforms

Laza, Orense, España

We power people’s progress. At Preply, we’re all about creating life-changing learning experiences. We help people discover the magic of the perfect tutor, craft a personalised learning journey, and stay motivated to keep growing. Our approach is human-led, tech-enabled - and it’s creating real impact. We’ve just reached unicorn status with a $150M Series D, accelerating our vision to transform education through human-led, AI-enhanced learning. Today, 100,000+ tutors teach 90+ languages to learners in 180 countries - and we’re only getting started. As a category-defining company, we’re shaping what the future of learning looks like at global scale. Every Preply lesson sparks change, fuels ambition, and drives progress that matters. Joining Preply means helping define the future of education at global scale, and building something that truly matters for millions of people, every day., The opportunity to unlock the potential of learners and tutors through language learning and teaching in 175 countries (and counting!) #LI-VL1 Our Principles Care to change the world

• We are passionate about our work and care deeply about its impact to be life changing. We do it for learners

• For both Preply and tutors, learners are why we do what we do. Every day we focus on empowering tutors to deliver an exceptional learning experience. Keep perfecting

• To create an outstanding customer experience, we focus on simplicity, smoothness, and enjoyment, continually perfecting it as every detail matters. Now is the time

• In a fast-paced world, it matters how quickly we act. Now is the time to make great things happen. Disciplined execution

• What makes us disciplined is the excellence in our execution. We set clear goals, focus on what matters, and utilize our resources efficiently. Dive deep

• We leverage business acumen and curiosity to investigate disparities between numbers and stories, unlocking meaningful insights to guide our decisions. Growth mindset

• We proactively seek growth opportunities and believe today’s best performance becomes tomorrow’s starting point. We humbly embrace feedback and learn from setbacks. Raise the bar

• We raise our performance standards continuously, alongside each new hire and promotion. We build diverse and high-performing teams that can make a real difference. Challenge, disagree and commit

• We value open and candid communication, even when we don’t fully agree. We speak our minds, challenge when necessary, and fully commit to decisions once made. One Preply

• We prioritize collaboration, inclusion, and the success of our team over personal ambitions. Together, we support and celebrate each other’s progress. Diversity, Equity, and Inclusion Preply.com is committed to creating an inclusive environment where people of diverse backgrounds can thrive. We believe that the presence of different opinions and viewpoints is a key ingredient for our success as a multicultural Ed-Tech company. That means that Preply will consider all applications for employment without regard to race, color, religion, gender identity or expression, sexual orientation, national origin, disability, age or veteran status.