326 to 350 of 362 Permanent FastAPI Jobs

Founding Engineer Python API LLM - Start-up

Hiring Organisation
Client Server
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
build software from scratch and iterate quickly You have strong technical skills, primarily with Python You have experience with RESTful APIs (they use FastAPI); TypeScript, React and other web technologies such as HTML5, CSS3 would be of benefit You have experience with LLMs and agentic AI, like to get your … Salary to £115k Equity Impactful role with excellent career growth opportunities Apply now to find out more about this Founding Engineer/Developer (Python FastAPI LLM) opportunity. ...

AI Engineer

Location
Birmingham, England, United Kingdom
Apexon is a digital-first technology services firm specializing in accelerating business transformation and delivering human-centric digital experiences. We help customers outperform their competition through speed and innovation, wherever they are in the digital ...

Product Engineer – London (Hybrid)

Location
Greater London, England, United Kingdom
Salary: Competitive, dependent on experience Role closes: 16th September, 2026 Please note on your application - Salary expectation, relevant rights to work in UK About VARA is an early-stage technology company currently operating in stealth. ...

Artificial Intelligence Engineer

Hiring Organisation
Arrows
Location
United Kingdom
architects and Team Leads, collaboration, and getting to know colleagues in person. About the Role You will be working with... Python 3.12 and the FastAPI web framework PHP 8.3 and Laravel 12 PostgreSQL and MySQL Docker and Docker Compose Git using CI/CD workflow OpenAI and other 3rd party … embedding APIs and tooling. Responsibilities Writing efficient, testable, and reusable Python code using the FastAPI framework Integrating those same AI features into the main site writing equally efficient, testable, and reusable code in PHP and Laravel Following the best practices and standards for development on the web app (enforced ...

Data Engineer

Location
Greater London, England, United Kingdom
dashboards, and integrate systems via APIs. In a team this size, you’ll also get involved in application development - building internal tools with Streamlit, FastAPI, or HTMX that put data directly in the hands of our investment and asset management teams. In your first 3 months you’ll have taken … manual data processes using Python, replacing spreadsheets and ad-hoc workflows with robust, repeatable jobs. Build performance dashboards and reports in Streamlit and HTMX (FastAPI) that Finance, Asset Management, and Fund Management actually use. Integrate internal and third-party systems via REST APIs, improving data accessibility across the business. Champion ...

Full Stack Engineer

Location
Greater London, England, United Kingdom
feature flags, and well-maintained non-production environments, enabling rapid iteration and feedback. Our Backend Stack Python is the dominant backend language used Flask & FastAPI Typing is used within our Python stack to power automated documentation and API definitions Relational Databases (PostgreSQL) at the heart of majority of services … from persistent storage to API endpoints, applying industry best practices for validation and reliability. Have experience with Python and web frameworks (we currently use FastAPI with strong typing and Pydantic). Have experience building and consuming APIs, ideally within a service-oriented architecture. Have a working knowledge ...

Python Engineer (Terminal/Modelling/Data) London

Location
Greater London, England, United Kingdom
without needing much of a runway, this is built for you. What You'll Do Build and maintain backend services and APIs, on Django, FastAPI, or similar, that power a live product used daily by energy market professionals. Design and operate data pipelines that ingest, transform, and serve energy market … hands-on experience with AWS and infrastructure-as-code (Terraform). You've run production infrastructure, not just experimented with it. Proficiency with Django, FastAPI, or a comparable async Python framework. Experience with data pipelines and relational databases (PostgreSQL), and building systems that serve data reliably at scale. Expert-level ...

Senior ML & AI Engineer - Personalization, Search & Audio (Hybrid/Remote UK)

Location
City of Westminster, England, United Kingdom
closely with our Lead Data Scientist in developing and maintaining the team’s API service which delivers real-time ML output to Platform Engineering. FastAPI experience would be advantageous in this regard. This role can be hybrid (London) or remote ( but must have UK right to work and be based … infrastructure as code solutions for automating model rollout such as Terraform. It would be beneficial to have: Proficiency with an API web framework e.g. FastAPI, Django, Flask. Familiarity with experimentation and AB testing frameworks and packages. Experience with vector databases or other methodologies that can support larger scale semantic search ...

Full Stack Developer

Location
Manchester, England, United Kingdom
Full Stack Developer Location Manchester Contract Type Permanent, full-time Key Responsibilities Develop, improve, and maintain software products across frontend and backend components, taking responsibility through implementation, testing, and ongoing operation. Build and maintain frontend ...

Senior Machine Learning Engineer (Maternity Leave Cover)

Location
Greater London, England, United Kingdom
Senior Machine Learning Engineer (Maternity Leave Cover) Department: Platform Delivery Employment Type: Fixed Term - Full Time Location: London Description The Machine Learning Engineer role sits within Client Delivery, embedded in the Data & Analytics Consulting (DACs ...

Lead Python Backend Engineer (FastAPI, Azure) - Hybrid

Location
Greater London, England, United Kingdom
Client Server is seeking a Lead Software Engineer/Developer with strong Python and FastAPI experience, plus Azure Databricks expertise. This hybrid London role combines hands-on coding with technical leadership to drive a complex SaaS platform in the cyber security insurance space. You will mentor small to medium technical ...

Senior Python Backend Engineer - FastAPI, Production-Ready

Location
Glasgow, Scotland, United Kingdom
Purview is seeking an experienced Python developer to own production services and reusable libraries, delivering production-ready APIs with FastAPI and Pydantic. You will handle large JSON/YAML/SQL datasets, implement robust validation, and contribute to CI/CD and monitoring in a hybrid Glasgow-based role. Ideal ...

Full-stack Engineer

Location
Greater London, England, United Kingdom
product instincts — you think about the why as much as the how Frontend excellence: React, TypeScript Backend proficiency: Node.js/NestJS or Python/FastAPI Solid understanding of distributed systems patterns and when to apply them Experience working alongside design functions and translating designs into high-quality product Track record … clinicians work every day. Our stack GCP · GKE · Terraform · GitOps & ArgoCD · PostgreSQL + Redis · TypeScript across the stack (React, NestJS) · Python/FastAPI for ML workloads · Pub/Sub for events · Self-hosted ML models What we offer 28 days holiday + bank holidays Latest MacBook and the right equipment ...

Senior Python Developer - AVP

Location
Belfast City District, Northern Ireland, United Kingdom
front office, Credit Risk Business. The candidate will be a core member of the technology team responsible implementing projects based on Python, FastAPI, MCP, LLM, Java and using latest technologies. Excellent opportunity to immerse in and learn within the Wholesale Credit Risk Division and gain exposure to business and technology … Research and resolve complex issues, escalating as appropriate. 5+ years of hands on experience in building an enterprise scale highly componentized application using Python, FastAPI Hands on development experience in Python Experience working with CI/CD pipelines, Kubernetes and other containerized platforms. Ability to effectively interact, collaborate with development ...

Machine Learning Scientist III

Location
Greater London, England, United Kingdom
At Expedia Group, we help travelers explore the world, one journey at a time. As a global travel company powered by passionate people, trusted partnerships, and leading technology, we connect travelers, partners, and advertisers through ...

Machine Learning Scientist III

Location
City of Westminster, England, United Kingdom
At Expedia Group, we help travelers explore the world, one journey at a time. As a global travel company powered by passionate people, trusted partnerships, and leading technology, we connect travelers, partners, and advertisers through ...

Lead Python Backend Engineer - FastAPI, Azure London

Location
Greater London, England, United Kingdom
Client Server Ltd. in London is seeking a Lead Software Engineer to design and lead backend services, focusing on Python, FastAPI, and Azure Databricks. You will remain hands-on while guiding a small to medium technical team, defining technical requirements, architecture, and collaborating with Product Owners. The role is hybrid ...

Backend Python Eng | FastAPI, AWS, Microservices | Equity

Location
Greater London, England, United Kingdom
Burns Sheehan Ltd is hiring Software Engineers to help rewrite and scale backend services using Python, FastAPI, and AWS. You will contribute to design, implementation, and production deployments within cross-functional squads in a product-led environment. Ideal candidates have 2-5 years in backend engineering, experience with microservices ...

Data Modelling Specialist

Hiring Organisation
McGregor Boyall
Location
Glasgow, Lanarkshire, United Kingdom
Employment Type
Full-Time
Salary
Salary negotiable
solutions supporting enterprise data, risk and regulatory requirements. Key responsibilities Design and maintain enterprise data and metadata models. Develop Python solutions using Pydantic and FastAPI . Configure and enhance Collibra asset models and governance workflows. Build reusable automation, validation and integration components. Work with REST APIs, JSON, YAML and SQL. … looking for Strong senior-level Python development experience. Hands-on experience with Pydantic for data modelling, validation and schema design. Experience with FastAPI, REST APIs, JSON, YAML and SQL . Strong understanding of data modelling, metadata, data governance and data quality . Hands-on experience with Collibra or a similar ...

Software Engineer TLNT1 NI

Hiring Organisation
Ocho
Location
Belfast, UK
Python Developer | Belfast | Hybrid Ocho People | Technology Recruitment Mid to Senior level Python Developer at a specialist technology consultancy Python, FastAPI/Flask, PostgreSQL and pytest across a diverse client base Work directly with clients on architecture and design... genuine autonomy from day one Hybrid working... 3 days on-site … rather than sit several layers removed from the client, this is the kind of opportunity that is hard to find. The stack is Python, FastAPI and/or Flask, with PostgreSQL and strong SQL work at its core, automated testing through pytest, and exposure to a range of architectures, tools ...

Senior Audio AI Engineer – TTS / Speech Synthesis

Location
United Kingdom
across various platforms (cloud, mobile, embedded). Optimize model inference using VLLM for efficient deployment. Build APIs and backend services for TTS deployment using FastAPI and Flask . Implement and manage data pipelines and storage solutions using MongoDB and MySQL . Technical Skills & Requirements Proficiency in Python and TypeScript … speech synthesis and NLP. Strong background in machine learning frameworks such as TensorFlow or PyTorch. Experience in designing scalable AI-driven applications. Familiarity with FastAPI , Flask , and cloud-based deployment environments. Knowledge of database management using MongoDB and MySQL . Your Experience Technical Expertise 3+ years of experience developing ...

Python Software Engineer

Location
Greater London, England, United Kingdom
responsibility, and thrives in a collaborative, supportive team where real impact is encouraged. Skills & Experience Job roles: Back End Core skills considered: Python, FastAPI, SQLAlchemy, Pandas, Numpy What You’ll Be Doing Design, build, and maintain APIs, backend services, and internal systems that support both client-facing features and operational … code reviews, technical discussions, and shared team practices Mentor peers and help grow a high-trust, high-impact engineering culture Python 3.x with FastAPI, Pydantic, SQLAlchemy, Pandas, and NumPy Relational databases: MySQL and PostgreSQL GCP experience is a plus, but not required Modern Middleware is a plus – e.g. Pub/ ...

Systems Integrator

Location
Greater London, England, United Kingdom
natural-language querying, rather than one-off extracts. Design and ship internal applications and AI-enabled tools - using Python, Streamlit, Databricks Apps (HTMX), Lakebase, FastAPI or similar - that put data and AI directly into the hands of fund management, asset management and finance teams. Prototype, evaluate and productionise … small team, where you set the working patterns rather than inherit them. Bonus Points For Full-stack or application development experience, particularly with Streamlit, FastAPI or HTMX. Familiarity with the Databricks ecosystem - Unity Catalog, Databricks Apps, Lakebase, Genie - or equivalent tooling. Experience with vector search, embeddings, document AI or retrieval ...

Systems Integrator

Location
Greater London, England, United Kingdom
natural‐language querying, rather than one‐off extracts. Design and ship internal applications and AI‐enabled tools - using Python, Streamlit, Databricks Apps (HTMX), Lakebase, FastAPI or similar - that put data and AI directly into the hands of fund management, asset management and finance teams. Prototype, evaluate and productionise … small team, where you set the working patterns rather than inherit them. Bonus Points For Full‐stack or application development experience, particularly with Streamlit, FastAPI or HTMX. Familiarity with the Databricks ecosystem - Unity Catalog, Databricks Apps, Lakebase, Genie - or equivalent tooling. Experience with vector search, embeddings, document AI or retrieval ...