Senior Python Engineer

Ciklum is looking for a Senior Python Engineer to join our team full-time in Spain.

We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live.

About the role:

As a Senior Python Engineer, you'll become a part of a cross-functional development team engineering experiences of tomorrow. We are partnering with Client to significantly upgrade the Retrieval-Augmented Generation (RAG) architecture of their AS Copilot system. Our goal is to drastically reduce AI hallucinations in code generation and optimize retrieval latency without re-architecting their existing platform.

Responsibilities:

• Lead the architectural bridge between evaluation and implementation for the AS Copilot RAG pipeline

• Drive the tuning of re-rankers, lead grounding and citation efforts, and supervise mid-level ML engineers

• Contribute to custom "Code-RAG" development, specifically handling AST-aware semantic chunking for industrial automation code

• Ensure all AI components are delivered securely as Python source code directly into the client’s Azure DevOps environment

• Pipeline Audit & Evaluation: Conduct RAG pipeline audits, establish baseline KPIs, and build robust evaluation frameworks using tools like RAGAS

• Advanced Retrieval & Grounding: Tune cross-encoder rerankers on Azure ML and lead the implementation of multi-turn grounding and claim-level citation frameworks

• Code-RAG Implementation: Develop custom tokenization and semantic chunking strategies for IEC 61131-3 structured text, avoiding generic tokenizers that destroy function block semantics

• Code Quality & Mentorship: Write clean, production-grade Python code, conduct thorough PR code reviews, and provide technical supervision to mid-level implementation engineers

• Agile Collaboration: Work directly within the client's SAFe cadence, actively participating in joint architectural decisions and continuous knowledge transfer

Requirements:

• Background: Strong background in Computer Science, Machine Learning, Data Science, or a related technical field

• AI/NLP Expertise: Deep, practical experience with Large Language Models (LLMs) and advanced Retrieval-Augmented Generation (RAG) architectures

• Technical Stack: Highly proficient in Python. Experience with PostgreSQL, pgvector, and hybrid search strategies (BM25 + dense) is required

• Cloud & MLOps: Hands-on experience with the Azure ecosystem, specifically Azure OpenAI, Azure Machine Learning, and Azure DevOps

• Evaluation Frameworks: Familiarity with LLM evaluation methodologies and tools like RAGAS, DeepEval, or custom Python test harnesses

• Code Parsing (Bonus): Exposure to Abstract Syntax Trees (AST) or custom grammar parsing for code-generation use cases is highly desirable

• Soft Skills: Effective problem-solving mindset, capable of client-facing technical leadership, and comfortable working in an embedded, co-delivery partnership

What`s in it for you?

• Care: your mental and physical health is our priority. We ensure comprehensive company-paid medical insurance and 4 additional undocumented sick leave days

• Tailored education path: boost your skills and knowledge with our regular internal events (meetups, conferences, workshops), Udemy license, language courses and company-paid certifications

• Growth environment: share your experience and level up your expertise with a community of skilled professionals, locally and globally

• Flexibility: Own your schedule – you are the one to decide when to start your working day. Just don’t miss your regular team stand-up. We are there to support your work-life balance and provide 23 vacation days.

• Opportunities: we value our specialists and always find the best options for them. Our Internal Mobility Program helps change a project if needed to help you grow, excel professionally and fulfill your potential

• Global impact: work on large-scale projects that redefine industries with international and fast-growing clients

• Welcoming environment: feel empowered with a friendly team, open-door policy, informal atmosphere within the company and regular team-building events

About us:

At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you’ll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress.

Based in Málaga, our team thrives in one of Andalusia’s leading tech hubs. Enjoy a hybrid work setup, the sunny Mediterranean vibe, and endless opportunities to grow your skills on global-scale projects.

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Explore, empower, engineer with Ciklum!

Interested already? We would love to get to know you! Submit your application. We can’t wait to see you at Ciklum.

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