Tesco Technology

About the Company

We are Tesco, and we're always looking ahead. We use tech to make things a little better for everyone, every day.

Forget off- the-shelf. We love coming up with our own ideas and building things ourselves. We empower our technologists to play a part in Tesco's future. Solving crunchy tech problems, making customers' lives a little easier, and making a difference to our communities and the planet.

Our Technology team is made up of over 3,500 experts spread over 5 countries: UK, Poland, Hungary, Czech Republic and India. These teams all have one thing in common - helping solve problems at a global scale.

Whether making products, software or systems, our teams each focus on a particular area, taking strategic ownership of the architecture, design, testing, deployment, infrastructure, operation and security of the systems in their domain, to ensure agile, smooth and safe operations, and maximum business impact.

It doesn't matter who you are, everyone has the opportunity to make things happen at Tesco. We listen and learn. We all love tech. And we always work together as a team. That's why you won't find big egos at Tesco. Just tech experts with lots of ideas that help millions of customers, every day.

Listed Jobs

Company Name

Tesco Technology

Job Title

Security Engineer II

Job Description

Job Title: Security Engineer II Role Summary: Lead the design, development, and continuous improvement of cyber‑security detection capabilities across on‑premises and cloud environments. Translate threat intelligence into actionable detection logic, ensuring robustness, thorough testing, and operational relevance for incident responders. Expectations: - Build and maintain detection rules, signatures, and automation scripts that support scalable, multi‑cloud and enterprise environments. - Collaborate with security operations, engineering, and risk & compliance teams in an agile, fast‑paced setting. - Provide expertise during incidents, threat hunts, and security evaluations. Key Responsibilities: - Develop, test, and refine detection logic using query languages (KQL, SPL). - Conduct code reviews, positive/negative testing, and secure‑by‑design processes for detection assets. - Translate MITRE ATT&CK, Lockheed Martin Kill Chain, and other threat frameworks into production‑ready rules. - Automate detection lifecycle and standardise processes across platforms. - Summarise and disseminate research findings to cross‑functional teams. - Support incident response and threat hunting initiatives. Required Skills: - Deep understanding of threat intelligence, attacker TTPs, and detection development lifecycle. - Proficiency in query languages (KQL, SPL) and scripting (Python, PowerShell, Bash). - Experience with Windows, macOS, Linux operating systems. - Knowledge of security concepts, MITRE ATT&CK, and security testing methodologies. - Ability to work independently and as part of a multidisciplinary team. Required Education & Certifications: - Bachelor’s degree in Computer Science, Cyber Security, or related field (preferred). - Certifications: CompTIA Security+, GIAC, CEH, SSCP (or equivalent). ---

Welwyn garden city, United kingdom

On site

12-03-2026

Company Name

Tesco Technology

Job Title

Senior AI Engineer

Job Description

Job title: Senior AI Engineer Role Summary: Own end‑to‑end development of large‑language‑model (LLM) solutions that power scalable GenAI products for customer experience, operations, and marketing. Lead rapid experimentation, prototype design, model deployment, and production maintenance across multiple business domains. Expectations: • Deliver production‑grade LLM systems within tight timelines. • Make data‑driven, technically sound decisions considering real‑world constraints. • Actively share knowledge and run cross‑team technical workshops. • Stay abreast of emerging AI engineering patterns and tooling. Key Responsibilities: • Design architecture for LLM pipelines, APIs, and backend services. • Prototype and iterate models quickly, validate with statistical evaluation. • Deploy models to production, manage lifecycle, versioning, and monitoring. • Implement experiment tracking, reproducibility, and model governance. • Collaborate with data, product, and infrastructure teams to integrate solutions. Required Skills: • Proven experience building/deploying end‑to‑end ML systems. • Deep understanding of LLMs, LLM frameworks (LangGraph, LangChain). • Strong background in software engineering, backend/API design, DevOps, and cloud infrastructure. • Proficiency in Python and its ML/NLP libraries (PyTorch, TensorFlow, HuggingFace, spaCy, etc.). • Practical knowledge of experiment tracking (MLflow, Weights & Biases), model versioning, and lifecycle management. • Ability to conduct robust statistical evaluation and make informed trade‑offs. Required Education & Certifications: • Bachelor’s or Master’s degree in Computer Science, Machine Learning, AI, or related field, or equivalent professional experience.

Welwyn garden city, United kingdom

On site

Senior

13-03-2026

Company Name

Tesco Technology

Job Title

Security Engineer - Application Security

Job Description

Job Title: Security Engineer – Application Security Role Summary: Lead application security activities by selecting, deploying, and maintaining security tooling that integrates into the DevOps pipeline. Provide technical guidance, training, and support to engineering teams, ensuring secure code practices and compliance with security policies throughout the software development lifecycle. Expectations: Deliver secure tooling solutions, draft comprehensive guidance, conduct secure code reviews, present risk trade‑offs to business stakeholders, and actively collaborate with cross‑functional teams in an agile environment. Key Responsibilities: - Identify and evaluate security toolsets (SCA, SAST, DAST, IaC security) that uncover code and dependency vulnerabilities. - Deploy and maintain tooling within CI/CD pipelines and DevOps environments. - Conduct secure code reviews for at least one language (Java, JavaScript/TypeScript, C#). - Provide domain expertise on application security, privacy, OWASP, Mitre, and CVSS. - Recommend and implement streamlined security solutions to close gaps in engineering practices. - Deliver training sessions on core security products to engineering and security teams. - Create and maintain documentation, guidance, and best‑practice playbooks for security tooling. - Offer technical support and incident response assistance for security tooling and engineering teams. Required Skills: - Strong programming expertise in one or more of: Python, Java, JavaScript/TypeScript, C#, Go. - Proficiency in secure code review for Java, Javascript, or C#. - Experience deploying security tooling in DevOps environments (CI/CD, container orchestration). - Deep understanding of application security disciplines (Web, API, Mobile). - Knowledge of microservices, container orchestration, and cloud security. - Solid grasp of SCA, SAST, DAST, IaC security tools. - Familiarity with OWASP Top 10, Mitre Top 25, CVSS frameworks and risk mapping. - Excellent written and verbal communication, with ability to translate technical risk to business stakeholders. Required Education & Certifications: - Bachelor’s degree or higher in Computer Science, Information Security, or related field (or equivalent practical experience). - Industry certifications such as CISSP, CISM, or relevant security certifications are advantageous.

Welwyn garden city, United kingdom

On site

13-03-2026