Flask Python AI Engineer with LangChain Experience – UK Remote

Kalisa; United Kingdom; Remote; GBP 45,000 - 75,000; Full time

Job summary

Join a fast-growing AI start-up that is at the forefront of the GenAI revolution! As a Flask Python AI Engineer, you'll work with a passionate team to build and enhance innovative AI-powered solutions. This role offers the chance to architect and implement reliable, high-performance Python services while integrating cutting-edge technologies like LangChain and vector databases. Enjoy the flexibility of remote work while contributing to impactful projects that shape the future of professional services. If you're eager to learn and make a difference, this opportunity is perfect for you!

Benefits

Competitive Pay

Fully Remote Work

Pension

25 Days Holiday + Bank Holidays

Career Growth Opportunities

Learning and Development Opportunities

Access to Latest Cloud & AI Technology

Supportive Team Environment

Qualifications

• 1-3 years experience in Python and Flask for backend services.
• Experience in building GenAI applications and working with LangChain.

Responsibilities

• Design and maintain scalable Python services in a Flask ecosystem.
• Implement RAG strategies and manage vector databases.

Skills

Python

Flask

LangChain

RAG Techniques

Tailwind CSS

SQL

Cloud Deployment

Data Security

Education

Bachelor's Degree in Computer Science or related field

Tools

MySQL

SQLAlchemy

Azure

AWS

GCP

Job description

Flask Python AI Engineer with LangChain Experience – UK Remote

Flask Python AI Engineer with LangChain Experience – UK Remote

Kalisa is a fast-growing AI start-up enabling the next generation of professional services. Our platform helps organisations turn their knowledge and expertise into chat agents, automated workflows and AI-powered experiences—securely, reliably, and at scale.

We are based in the UK and service a rapidly growing client base around the world. Due to this continued growth we are expanding our engineering team to help us scale our platform and build new functionality.

We are at the start of the GenAI revolution, and this is an opportunity like no other. If you think you are the right person for the role, we encourage you to apply and look forward to hearing about your tech journey.

Who you are

• We are seeking an experienced Flask Python AI Engineer with LangChain Experience with a proven track record in building and deploying production-grade GenAI applications.
• You will join a small, agile, and passionate team to enhance and scale our GenAI platform.
• This will involve working closely with our team to deliver new features, improve existing functionality, and ensure seamless integration with new foundation models as they become available.
• You will be able to work independently, be self-sufficient, eager to learn, be able to build something from scratch and see it through to completion.

As a key team member, you will:

• Architect & Implement: Design, build, and maintain reliable, scalable, and high-performance Python services within a Flask-based ecosystem.
• GenAI Integration: Work with LangChain to implement prompt engineering techniques, RAG pipelines, and intelligent agent capabilities.
• RAG & Vector Databases: Implement and optimise RAG strategies, semantic search capabilities, and embeddings-based retrieval; integrate and manage vector databases.
• Relational Databases: Leverage MySQL and SQLAlchemy as the ORM to design robust, optimised schemas and implement efficient data retrieval and storage strategies.
• Cloud Deployment: Integrate and deploy services across cloud platforms (Azure, AWS, GCP), ensuring robust infrastructure, monitoring, and observability.
• Data Security & Compliance: Collaborate with security teams and architects to ensure data privacy, compliance, and reliable access controls within enterprise environments.
• Continuous Improvement: Participate in code reviews, contribute to technical documentation, and proactively identify opportunities for platform optimisation and enhancement.

Requirements

Professional Experience:

• Python Proficiency: Minimum of 1-3 years experience working with Python, the Flask framework, developing relational database-driven backend services, APIs and web apps.
• Front-End Integration: Demonstrable experience of working with Tailwind CSS to implement responsive website and web app designs.
• GenAI Expertise: A minimum of 1 year of experience building and shipping at least one GenAI product (e.g., LLM-based app, custom chatbot, RAG-driven knowledge platform).
• LangChain: Demonstrable experience working with LangChain.
• RAG & Vector Technologies: Demonstrable knowledge of RAG techniques, vector databases, semantic search, and embedding models.

Nice to have:

• Front-End Integration: Working knowledge of HTMX to build dynamic web applications.
• Cloud Platforms: Practical experience deploying and managing applications on at least one major cloud provider (Azure, AWS, or GCP).

Additional Requirements:

• Based in the UK and authorised to work.
• Strong communication skills and the ability to work effectively in a fully remote team environment.
• Fluent English speaker and writer.
• Most of our work is in written form, which means being a good writer is very important. The importance of high-quality writing is carried through our designs, internal project discussions, code comments and the code itself.
• Self-starter mentality with a focus on delivering tangible results.

What We Offer

• Competitive Pay: Based on your experience to date.
• Fully Remote: Enjoy the freedom to work from anywhere in the UK.
• Pension
• 25 Days Holiday + Bank Holidays
• High Impact Work: Contribute to a fast-growing platform already used globally, enhancing your experience and portfolio.
• Career Growth Opportunities: Work at the intersection of cutting-edge AI research, product innovation, and world-class engineering practices.
• Latest Cloud & AI Technology: From AWS, Azure and GCP.
• Learning and Development Opportunities: Including access to resources and mentorship.
• A Friendly, Supportive and Passionate Team.

Our Hiring Process

• Initial Interview, including GenAI project walkthrough: Meet with our CEO for an in-depth discussion about your experience, approach, and technical skills. This is an opportunity for us to get to know each other and ensure we share the same vision and values. You will also present a real-life GenAI project you have recently worked on. You will walk us through your design decisions, implementation details, and the overall outcome, giving us a chance to understand your problem-solving approach and coding style.
• Technical Challenge: If you are successful in the initial interview, you will be invited to complete a technical challenge that will be briefed based on your experience. We expect this to take 1-2 days, and you will be compensated for your time.

If you are excited about pushing the boundaries of what is possible with GenAI and you meet the above criteria, we would love to hear from you.

** Direct applications only - No recruiters **

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

• Industries

  Technology, Information and Internet

Referrals increase your chances of interviewing at Kalisa by 2x

Sign in to set job alerts for “Artificial Intelligence Engineer” roles.

Software Engineer, Multiplayer - Beat Games

London, England, United Kingdom 3 weeks ago

London, England, United Kingdom 2 months ago

London, England, United Kingdom 2 weeks ago

London, England, United Kingdom 2 months ago

London, England, United Kingdom 3 weeks ago

London, England, United Kingdom 3 weeks ago

Software Engineering Intern, Developer Tools

London, England, United Kingdom 5 days ago

Frontend Developer Intern - Remote Internship in Frontend Development

Glasgow, Scotland, United Kingdom 6 days ago

London, England, United Kingdom 1 month ago

London, England, United Kingdom 5 months ago

London, England, United Kingdom 2 weeks ago

London, England, United Kingdom 7 months ago

Manchester, England, United Kingdom 3 days ago

Software Engineer Intern/Co-op (Fall 2025)

London, England, United Kingdom 4 days ago

London, England, United Kingdom 1 week ago

We’re unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI.