Software Engineer, Core ML Team (ML 0126)

At Skroutz, our mission is simple: we aim to amaze. From our humble beginnings back in 2005, we believe that happy customers equal happy merchants and it’s our job to understand and anticipate their needs and offer them an unparalleled, doubt-free experience. 

Our vision is clear: we aspire to simplify shopping, creating a trusted platform where millions discover and fulfill their online shopping needs easily and safely.

Whether you're looking for a new smartphone, restocking your pantry with essentials, seeking the perfect outfit for an upcoming event, or simply hunting for that collectible gaming console, Skroutz is your trusted partner for seamless shopping experiences.

And our ambitions extend far beyond Greece's borders. We're on a trajectory to become one of Europe's fastest-growing Marketplaces, with exciting expansions already underway in Cyprus and the Balkans. Our commitment to customer satisfaction remains paramount, guiding every decision we make.

To achieve our vision, we seek individuals who share our passion for e-commerce and technology. If you're driven by the desire to create extraordinary shopping moments for our users, as well as help sellers all around the world grow their businesses, then we want you on our team.

Join us at Skroutz and be part of a journey that's reshaping the way we shop online. Together, let's turn everyday moments into remarkable experiences.

Ready for the challenge?

#AimToAmaze

Our Engineering Values

• Know your Tech. Develop and master your craft, sharpen your tools. Be proud of your work.
• Release early & Iterate. Deliver prototypes and start gathering important feedback early on. Use that feedback to guide you. Don't be afraid to compromise, make sure to come back & tidy things up.
• Be a team player. Offer your help, listen and seek to understand. Step up & take initiatives.
• Don't over anything. Don't over-engineer, over-analyze, over-regulate, you get it.
• Enjoy your work. Celebrate success.

Our Stack

Our main application stack is Ruby on Rails as our framework of choice - with Javascript (ES6) and React/Redux for the frontend. We heavily use MariaDB, Elasticsearch, Kafka, MongoDB and Redis.

Our AI stack is built on LangChain and LangGraph for orchestrating LLM workflows and multi-agent systems, with PostgreSQL for state persistence and Elasticsearch for semantic search. We integrate with cloud LLM providers like OpenAI. For observability and monitoring, we use Langfuse for LLM tracing, along with tools like Sentry, NewRelic, and Grafana.

Generally we try to pick the best tool we know or we can find that serves our needs. You can read more about what we have worked on our Engineering blog.

How you will contribute to Skroutz vision

We are looking for a Software Engineer to join our CoreML team* which is at the forefront of making AI assistants first-class citizens in our marketplace. You will be responsible for developing and maintaining our AI shopping assistant and AI support agent, working on cutting-edge conversational AI systems that serve millions of users. In this role, you will contribute to both our Python-based AI services and our main Ruby on Rails application, bridging the gap between our AI capabilities and our core marketplace platform.

As part of the CoreML team, you will:

• Design, develop, and maintain production AI systems including our conversational search agent and support assistant
• Build and optimize LLM-powered workflows using LangChain and LangGraph for multi-agent orchestration
• Implement semantic search capabilities and multi-source data fusion to provide accurate, contextual responses
• Develop and maintain APIs and services using FastAPI that integrate AI capabilities into our marketplace
• Integrate AI features into our main Ruby on Rails application, ensuring seamless user experiences
• Work with state-of-the-art LLM technologies and contribute to architectural decisions about our AI infrastructure
• Collaborate with data scientists, backend engineers, and product teams to deliver AI features that amaze our users
• Build robust evaluation frameworks and monitoring systems to ensure quality and reliability of AI systems
• Optimize system performance, latency, and cost efficiency of LLM-based applications
• Stay current with the rapidly evolving AI/LLM ecosystem and bring innovative solutions to the team

Requirements

• 3+ years of working experience as a Software Engineer in a professional setting
• Strong programming skills in Python or similar object-oriented language with experience building production systems
• Solid understanding of web architecture and RESTful API design
• Experience with databases (relational and/or document-based)
• Solid algorithmic and software engineering background
• Intrigued by the product as much as by the technology
• Excellent analytical and problem-solving skills
• Excellent communication skills and team spirit
• Passion for AI and eagerness to work with LLM technologies

We will appreciate if you have

• Experience with LangChain, LangGraph, or similar LLM orchestration frameworks
• Familiarity with FastAPI or similar modern Python web frameworks
• Good knowledge of Ruby/Ruby on Rails - our main backend stack
• Experience with OpenAI API or other LLM providers
• Knowledge of Elasticsearch or other search technologies
• Understanding of prompt engineering and LLM best practices
• Experience with observability tools and LLM tracing systems
• Comfort with TDD and testing practices (pytest, unit testing)
• Experience deploying ML/AI systems to production
• Contributed to open-source projects in the AI/ML space
• Shareable open source contributions or personal projects which will help us in the evaluation process

Benefits

• A great opportunity to contribute to the evolution of Skroutz towards becoming one of Europe’s fastest growing Marketplaces
• Thrive in an environment that champions ambitious goals, empowers autonomy, fosters mentoring, and unlocks exciting opportunities for both personal and business growth
• Competitive full-time salary
• Ongoing training and development
• Access to books, online courses, and relevant resources
• Top of the Line tools and equipment
• Private Medical Plan
• Hybrid Working
• Free gym membership at Golden Gym in Athens, plus OAKA cross training & running courses, Padel and online yoga
• For all New Skroutz Fathers we offer 30 working days paternity leave (1,5 months in total)
• Monthly childcare allowance for all Skroutz Parents
• When at the office, we offer free food catering (breakfast & lunch)
• Free Skroutz Plus subscription

As part of our dedication to the diversity of our workforce, Skroutz is committed to Equal Employment Opportunity without regard to race, color, national origin, ethnicity, gender, disability, sexual orientation or religion.

Disclaimer:

Skroutz collects and processes personal data in accordance with the EU General Data Protection Regulation (GDPR). We are bound to use the information provided within your job application for recruitment purposes only and not to share these with any unauthorized third parties. Please read our Recruitment Privacy Policy here.