Senior Engineer - Python & Containerization

Citigroup Inc.; City Of London; Hybrid; GBP 100,000 - 125,000; Full time

Job summary

A leading global bank in London is seeking a Container Security Engineer. This role involves building and enhancing security solutions for container technologies, improving developer workflows, and collaborating across teams. Candidates should have 7+ years of relevant experience, expertise in container technologies such as Docker and Kubernetes, and strong programming skills in languages like Python or Java. The position offers a hybrid working model and competitive salary with additional benefits.

Benefits

27 days annual leave

Discretionary performance-related bonus

Private Medical Care

Life Insurance

Pension Plan

Paid Parental Leave

Employee discounts

Learning and development resources

Qualifications

• 7+ years of relevant industry work experience.
• Experience contributing to architecture and design of systems.
• Hands-on experience with enterprise software solutions.

Responsibilities

• Analyse and enhance Container Security tools.
• Own scalable solutions across the organisation.
• Collaborate with stakeholders across Engineering and Operations.

Skills

Problem-solving skills

Interpersonal skills

Container Image Scanning platforms

Programming language expertise (Python or Java)

DevOps and CI/CD

Kubernetes and container technologies

Education

Bachelor’s degree or equivalent work experience

Tools

Docker

Podman

Openshift

Git

Maven

Jenkins

Bitbucket

Job description

Overview of Citi

Citi, the world leading global bank, has approximately 200 million customer accounts and a presence in more than 160 countries and jurisdictions worldwide. Citi provides consumers, corporations, governments, and institutions with a broad range of financial products and services, including consumer banking and credit, corporate and investment banking, securities brokerage, transaction services, and wealth management. Citi enables clients to achieve their strategic financial objectives by providing them with cutting‑edge ideas, best‑in‑class products and solutions, and unparalleled access to capital and liquidity.

The Team

The Chief Information Security Office (CISO) is responsible for looking after the cyber security of all of Citi’s technical assets. It has several new and exciting programmes utilising cutting edge cloud and container technologies, with a view to ensuring that our cyber security is best in class and offers reassurance to our wider business lines and clients alike.

The job

This role sits within the Container Security team, which is responsible for ensuring, maintaining, and improving the security of our container technologies within the firm. You will be responsible for engineering automated security solutions that both secure and harden internal platforms as well as reduce friction for developers in their daily development lifecycle. You will be improving the container SDLC for internal developers from an image scanning perspective, engineering firm‑wide solutions and partnering with centralised platform teams, DevOps teams and our developer community where appropriate.

What the role covers

• Analysing, architecting, building and enhancing Container Security tools and platforms that provide capabilities for CISO and developers.
• Owning solutions that are expected to operate and perform at scale across the organisation.
• Collaboration with multiple stakeholders and partners across Engineering and Operations as well as partner teams within the wider Citi organisation, across different time zones.

Job Skills / Qualifications

• Highly motivated self‑starter with excellent interpersonal and problem‑solving skills
• Bachelor’s degree or equivalent work experience
• Good oral and written communication skills
• 7+ years of relevant industry work experience
• Hands‑on experience integrating Container Image Scanning platforms and tooling
• Experience of the full lifecycle of design, implementation and running of enterprise software solutions involving cross‑functional team collaboration
• Experience contributing to the architecture and design (architecture, design patterns, reliability, scaling) of new and current systems
• Experience of k8s and container technologies such as Docker, Podman and Openshift
• Experience of security fundamentals with relation to a k8s platform and DevSecOps a bonus
• Expertise in a major programming language such as Python or Java, and associated tooling (Git, Maven, IDEs, Jenkins, Bitbucket etc)
• Expertise with DevOps, CI/CD and agile methodology

We offer

By joining Citi London, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as:

• 27 days annual leave (plus bank holidays)
• A discretionary annual performance related bonus
• Private Medical Care & Life Insurance
• Employee Assistance Program
• Pension Plan
• Paid Parental Leave
• Special discounts for employees, family, and friends
• Access to an array of learning and development resources

Visit our Global Benefits page to learn more.

Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law. If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi. View Citi’s EEO Policy Statement and the Know Your Rights poster.