Senior Platform Software Engineer - R&D Automation

Engg; Barcelona; Presencial; EUR 70.000 - 110.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Relocation package

Learning budget

Time off for development

Health insurance

Gym/Wellness access

Descripción de la vacante

Preply in Barcelona is seeking a senior backend engineer to design and build scalable AI-powered backoffice systems. You will contribute to agentic workflows, integrate AI with codebases, and collaborate across Engineering, Product, Design and Data.

Bring ~8 years of backend experience, strong Python, and hands-on AI agent experience. You’ll prototype rapidly, ensure reliability, and help define how AI adds value while preserving human judgment.

Formación

• Extensive backend experience designing scalable systems.
• Strong Python development and production-grade skills.
• Hands-on AI agents or agentic workflows experience.
• Understanding of modern agentic AI patterns and evaluation.
• Experience integrating AI with APIs and internal tools.
• Proven ability to prototype, measure value, and scale.
• Distributed systems knowledge for reliable AI power.
• Good product thinking and user workflow focus.
• Strong communication skills, English C1+.

Responsabilidades

• Design and build AI agents and harnesses using Python.
• Create reusable capabilities and integrations within engineering tools.
• Develop agentic workflows across Engineering, Product, Design and Data.
• Prototype new AI capabilities and scale successful approaches.
• Define context, orchestration, and verification for reliability.
• Measure usage and value, iterate with data-driven feedback.
• Decide where AI adds value while safeguarding human input.
• Collaborate with Preply teams to drive adoption and automation.

Conocimientos

Backend design

Python

AI agents

Agentic AI

API integration

Experimentation

Distributed systems

Product thinking

Communication (English)

Descripción del empleo

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. MEET THE TEAM! The Platform Tribe builds and operates the platform that Preply engineers develop and deploy on, and that millions of learners and tutors rely on every day. Our platform handles over 20bln requests per month, and we combine software engineering, distributed systems and cloud infrastructure to keep it reliable at scale while making it faster and easier for engineering teams to build on top of it.

As part of the R&D Automation team, you’ll focus on:

• Agentic software development: building AI agents that automate and augment workflows across the entire software development lifecycle.
• AI platforms and capabilities: creating reusable foundations, tools and integrations that allow agents to interact effectively with our codebases, engineering systems and internal knowledge.
• Experimentation at speed: rapidly prototyping new approaches, measuring their effectiveness and scaling the ones that create meaningful value.
• Safe and reliable automation: designing the right verification, context and human-in-the-loop mechanisms so agentic workflows can be adopted with confidence.

WHAT YOU’LL BE DOING:

• Design and build AI agents and the harness that power them using Python.
• Build reusable agent capabilities, tools and integrations that connect AI systems with our engineering ecosystem and internal knowledge.
• Develop agentic workflows across Engineering, Product, Design and Data, including coding, testing and code review, and across the broader software development lifecycle.
• Experiment rapidly with new AI capabilities, taking ideas from proof of concept through validation and scalable adoption.
• Design effective context, orchestration and verification mechanisms for reliable agentic workflows.
• Measure how agents are used and the value they create, using data and feedback to continuously improve them.
• Make thoughtful decisions about where AI can add value, where human judgment remains essential, and how the two should work together.
• Collaborate closely with engineers, designers, product, and data teams across Preply to understand their workflows, drive adoption and identify new opportunities for automation.

WHAT YOU NEED TO SUCCEED:

• Extensive experience (~8 years) designing and building complex backend software systems.
• Strong software engineering skills with production experience using Python.
• Hands‑on experience building AI agents, agentic workflows or platforms that enable others to build and use AI-powered capabilities.
• Strong understanding of modern agentic AI patterns, including context management, tool use, orchestration and evaluation/verification.
• Experience integrating AI systems with APIs, MCPs, internal tools, codebases and other engineering systems.
• Experience taking new technical ideas from experimentation or proof of concept into robust, scalable solutions.
• A strong experimentation mindset: comfortable working with ambiguity, iterating quickly and using data and feedback to determine what works.
• Good understanding of distributed systems and the backend architecture required to operate AI-powered systems reliably.
• Strong product thinking, with the ability to understand user workflows and connect technical solutions to measurable outcomes.
• Strong communication skills. Minimum C1 English level.

WHY YOU’LL LOVE IT AT PREPLY

• An open, collaborative, dynamic, and diverse culture;
• A generous monthly allowance for lessons on Preply.com http://Preply.com, Learning & Development budget, and time off for your self-development;
• A competitive financial package with equity, leave allowance, and health insurance;
• Not in Barcelona? We offer an attractive relocation package to join us in our Preply Barcelona Hub;
• Access to free mental health support platforms;
• Access to Gympass-partnered wellness and gym centers throughout Spain to promote and support well-being and physical health;
• The opportunity to shape the lives of learners and tutors through language learning and teaching in 175 countries (and counting!)

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 del