Chatbot Engineer / LangChain Expert
Job description
We are looking for a developer to join an international team building centralized chatbot solutions for a major European banking group. This is a stable environment with a long-term vision, a strong focus on innovation, and the development of AI technologies.
The team is working on intelligent conversational assistants that help users directly within the bank’s digital products – for example, by processing transactions, sending payments, or providing personalized insights about financial products.
From a technical perspective, this is a modern solution built on LangChain and other AI frameworks. The current codebase includes Node.js, Python, and Java, with a plan to migrate towards a unified technology stack (most likely Java) in the near future.
In addition to chatbot development, the team also explores new applications of AI across the banking ecosystem – making this an ideal environment for people who enjoy combining technical expertise with creativity and an experimental mindset.
The selection process is thorough and multi-stage – the goal is to find people who will fit well into a long-term team and have room to grow together with it.
Requirements
What You Will Bring:
Experienced in at least one of the following languages and comfortable working with the others: Java, Python, or Node.js.
Strong hands-on experience with the LangChain library.
Solid understanding of OOP and SOLID principles.
Working knowledge of relational (SQL) and/or NoSQL databases.
Practical experience in prompt engineering and LLM integration.
Nice to Have:
Experience building APIs (FastAPI or similar frameworks).
Familiarity with vector databases (Elastic, Azure AI Search, etc.).
Hands-on experience with cloud platforms (Azure, AWS, or GCP).
Basic understanding of Kubernetes and containerized environments.
Interest in DevOps practices and automation.
Familiar with chatbot architecture or AI integration.
Appreciate stability, mature processes, and international collaboration.
Company description
Who we are
Ableneo is a partner for AI and technology-driven transformation. We combine deep software engineering with business consulting to help organisations implement intelligent systems that deliver measurable results and reduce the risk of failed innovation.
What we do
• AI & Data Enabling. We deploy chatbots and LLM solutions, automate documents and workflows, and work with Computer Vision. Our focus is on solving concrete business problems with AI and achieving a high success rate in real use cases.
• Business Optimisation & Efficiency. We streamline processes, reduce delays, automate operational work, and set up more efficient ways of working.
• Product Design & Development. We design and build digital products, customer journeys, and scalable platforms that support long-term growth.
• Software Engineering. We offer flexible delivery models. From specialised roles to full teams, supporting both fast-growing companies and established enterprises.
Why join us
We have years of experience and strong references across startups, scale-ups, and large organisations. We work on assignments where AI makes real impact. For example, in the banking sector we validated an LLM solution with a high success rate in a real proof-of-concept.
At Ableneo you will work on projects that push the boundaries of AI and software engineering. You will solve complex problems, collaborate with decision-makers, and help build systems that have immediate business value.
If you want to shape the next generation of intelligent software, let’s talk.
Employee perks, benefits
Engaging projects across diverse industries, offering continuous professional challenges and growth opportunities
Tailor-made learning & development program, complemented by monthly in-house workshops to boost your skills
Flexible working hours and the possibility of home office
Modern, inspiring office environment with daily perks such as breakfast, fresh fruit, and yoga sessions