Backend Engineer at Weekday AI

✨ The Stack take on this Weekday AI job

• 🏢 This is Weekday AI's only job here right now
• 🛂 Skilled Worker visa. Standard minimum salary: £41,700 a year guide
• 💡 No salary shown. Ask Weekday AI if it is above the minimum.

Updated 2026-11-05, from our data and official sources.

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About the role

Responsibilities:
- Design, build and maintain backend services and REST APIs using Python and FastAPI.
- Develop scalable microservices and integrations that power LLM-based and agentic AI workflows.
- Integrate LLMs and AI components into production pipelines, handling inference, caching and orchestration.
- Collaborate with product, ML and frontend teams to deliver end-to-end solutions and APIs.
- Ensure reliability, performance and observability: logging, metrics, testing and automated deployments.
- Debug and resolve complex production issues; contribute to architectural and design decisions.

Requirements:
- 5+ years backend development experience with strong Python and FastAPI skills.
- Solid understanding of REST API design, microservices and scalable system architecture.
- Practical exposure to LLMs, agentic AI patterns or AI system integration preferred.
- Experience with cloud environments, deployment pipelines and production monitoring.
- Strong problem-solving, debugging and communication skills; product-focused mindset.
- Willingness to relocate for an onsite international role; visa sponsorship available.

Responsibilities

Design and maintain scalable backend systems and REST APIs using Python and FastAPI. Integrate Large Language Models and agentic AI capabilities into production-grade automation solutions.

Requirements

Requires 5 to 9 years of backend development experience with strong proficiency in Python and FastAPI. Experience with AI systems, LLMs, and cloud-based environments is highly advantageous.

Key skills

• Python — in 1200 other listings on The Stack
• FastAPI — in 91 other listings on The Stack
• REST APIs — in 63 other listings on The Stack
• Microservices — in 236 other listings on The Stack
• LLMs — in 80 other listings on The Stack
• Agentic AI — in 39 other listings on The Stack
• System Design — in 199 other listings on The Stack
• Cloud Computing — in 46 other listings on The Stack
• Backend Development
• Debugging
• Problem Solving
• API Design

Relocation terms mentioned in this listing

• visa sponsorship

Quoted from the listing's text; confirm the details with Weekday AI.

On The Stack (as of 2026-11-05)

• This is Weekday AI's only listing on The Stack.
• 214 visa-sponsored jobs in the United Kingdom on The Stack, posted in the last 60 days.
• 68 visa-sponsored backend engineer jobs in Europe on The Stack, posted in the last 60 days.

Frequently asked questions about Weekday AI

Is this Backend Engineer role still open?

It was posted on 2026-05-06. Listings more than 30 days old may no longer be active, so check Weekday AI's site before applying.

Does Weekday AI offer visa sponsorship?

This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on Weekday AI's site.

Where is this role located?

The listing gives the location as Hoyland, United Kingdom. It is marked on-site.

What skills does this role ask for?

The listing names: Python, FastAPI, REST APIs, Microservices, LLMs, Agentic AI, System Design, Cloud Computing, Backend Development, Debugging, Problem Solving, API Design.