Senior Software Engineer Data & Intelligence Platform

Tesco; Welwyn Garden City; Hybrid; GBP 36,000 - 76,000; Full time

Benefits offered by this job

Annual bonus up to 20%

Private medical insurance

25 days holiday + personal day + bank

24/7 virtual GP

Wellbeing support

Job summary

Tesco is seeking an engineer to help assemble a high-performance data platform in Welwyn Garden City, blending analytical, caching, vector, and object stores behind a typed API. You’ll contribute to supply chain intelligence and forecasting APIs, ensuring timely, reliable data delivery.

The role blends data engineering, ML, and developer infrastructure with a strong focus on scalable backend systems. Required are solid TypeScript and Python skills, experience with production data systems, and a

Qualifications

• Ownership and fix problems without being asked.
• Comfort with ambiguity and navigating unclear problems without handholding.
• Readable, tested code that others want to work with.
• Experience across backend services and data systems in production.
• Ability to pick up new technology quickly (TypeScript and Python).

Responsibilities

• Build a high-performance data platform combining analytical, caching, vector, and object stores behind a typed API.
• We work on supply chain intelligence layers to make forecasts accessible, actionable, and explainable via APIs.
• Ensure data reaches the right place at the right time and remains fresh.
• Develop a conversational and tool-calling LLM integration layer for NLP access to data and forecasts.
• Improve retrieval quality, tool design, prompts, and streaming response pipelines.
• Own end-to-end problems across data engineering, applied ML, and developer infrastructure.
• Design data APIs, improve retrieval in RAG pipelines, and collaborate to productionize services.

Skills

TypeScript

Python

Data-intensive backend

Kubernetes

CI/CD

LLM APIs

Retrieval systems

Cloud-native deployment

Ownership/problem-solving

Tools

Helm

REST

API design

RAG

Kubernetes manifests

CI/CD pipelines

Job description

Salary: £36,000 - 76,000 per year

Requirements:

• We are looking for someone who takes ownership and fixes problems without waiting to be asked.
• We need someone who is comfortable with ambiguity and can navigate unclear problems without handholding.
• We want someone who writes readable, tested code that other engineers want to work with.
• We need someone with experience across backend services and data systems in production.
• We need someone who can pick up new technology without being overly attached to what they already know.
• We are looking for strong TypeScript and Python skills, or a willingness to learn quickly.
• We need experience building or operating data-intensive backend services.
• We would like some experience with LLM APIs or retrieval systems.
• Kubernetes and cloud-native deployment experience is useful.
• Supply chain or forecasting domain knowledge is useful but not required.
• Nice to have: experience contributing to shared frontend/backend or developer platform infrastructure.
• Nice to have: infrastructure as code experience, including Helm, Kubernetes manifests, and CI/CD pipeline design.
• Nice to have: supply chain, replenishment, or demand forecasting domain familiarity.

Responsibilities:

• We are responsible for building a high-performance data platform that brings together analytical, caching, vector, and object stores behind a clean typed API.
• We work on supply chain intelligence layers that make forecasting outputs accessible, actionable, and explainable through well-designed APIs.
• We ensure the right data reaches the right place at the right time and remains fresh.
• We build and improve a conversational and tool-calling LLM integration layer for natural language access to platform data and forecasts.
• We work on retrieval quality, tool design, prompt architecture, and streaming response pipelines.
• We own problems end to end across data engineering, applied ML, and developer infrastructure.
• We may design data APIs, improve retrieval in RAG pipelines, and work with infrastructure to get services into production.

Technologies:

• API
• Backend
• CI/CD
• Cloud
• Frontend
• Helm
• Support
• Kubernetes
• LLM
• Mobile
• Network
• Python
• RAG
• REST
• TypeScript

More:

We are Tesco, a supermarket, technology company, and award-winning mobile network, with colleagues working to make every day a little better for our customers, colleagues, and communities. This is a hybrid role based in Welwyn Garden City, with 60% of the week spent collaborating at our office locations or local sites and the rest working remotely. We offer a competitive colleague benefits package, including an annual bonus scheme of up to 20% of base salary, holiday starting at 25 days plus a personal day and bank holidays, private medical insurance, maternity, adoption and paternity leave, a free 24/7 virtual GP service, and employee wellbeing support. We are proud to be an accredited Disability Confident Leader and provide a fully inclusive and accessible recruitment process. We welcome flexible working conversations and encourage applications even if you do not tick every box.

last updated 36 week of 2026