Senior Software Engineer (Java Or Python) - VP

Citigroup Inc.; Belfast City District; Hybrid; GBP 90,000 - 120,000; Full time

Benefits offered by this job

27 days annual leave

Discretional bonus

Private medical & life insurance

Employee assistance program

Pension plan

Parental leave

Employee discounts

Learning resources

Job summary

Citigroup Inc. is seeking a Senior Software Engineer (Java or Python) to help shape next‑gen financial software. You will engage in full‑stack development, leverage Spring Boot/Core and Flask/FastAPI, and build cloud‑native solutions with modern JS frameworks.

You will also explore Gen‑AI concepts, APIs, and scalable architectures while mentoring mid‑level staff and collaborating with cross‑functional teams in a hybrid work setting.

Qualifications

• Experience in full‑stack application development with Java or Python.
• Backend with Spring Boot/Core and Flask/FastAPI.
• Solid frontend experience with modern JavaScript frameworks.

Responsibilities

• Partner with management teams to integrate functions and deploy new products.
• Resolve high impact problems through evaluation of processes and standards.
• Provide expertise in applications programming and align with architecture blueprint.
• Develop standards for coding, testing, debugging and deployment.
• Mentor mid‑level developers and analysts; allocate work as needed.
• Assess risk and ensure compliance with laws and policies.

Skills

Java

Python

Frontend development

Cloud computing

Gen‑AI concepts

OpenAI API integrations

Tools

Spring Boot

Spring Core

Flask

FastAPI

React

Angular

Vue

LangChain

LangGraph

MLflow

n8n

AWS

GCP

Azure

Job description

Senior Software Engineer (Java Or Python)

Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech.

Role Overview/What will you do:

• Partner with multiple management teams to ensure appropriate integration of functions to meet goals as well as identify and define necessary system enhancements to deploy new products and process improvements
• Resolve variety of high impact problems/projects through in-depth evaluation of complex business processes, system processes, and industry standards
• Provide expertise in area and advanced knowledge of applications programming and ensure application design adheres to the overall architecture blueprint
• Utilize advanced knowledge of system flow and develop standards for coding, testing, debugging, and implementation
• Develop comprehensive knowledge of how areas of business, such as architecture and infrastructure, integrate to accomplish business goals
• Provide in-depth analysis with interpretive thinking to define issues and develop innovative solutions
• Serve as advisor or coach to mid-level developers and analysts, allocating work as necessary
• Appropriately assess risk when business decisions are made, demonstrating particular consideration for the firm’s reputation and safeguarding Citigroup, its clients and assets, by driving compliance with applicable laws, rules and regulations, adhering to Policy, applying sound ethical judgment regarding personal behavior, conduct and business practices, and escalating, managing and reporting control issues with transparency.

Key Skills and Experience required

Additional Job Description

• Experience in full‑stack application development with strong expertise in Java or Python
• Deep experience with backend frameworks such as Spring Boot / Spring Coreand Flask / FastAPI
• Solid frontend experience with modern JavaScript frameworks(React, Angular, or Vue)
• Experience designing and delivering scalable, cloud‑native applications
• Exposure to Gen‑AI concepts including:
  • Large Language Models (LLMs) and transformer‑based systems
  • Prompt engineering and basic agent workflows
  • Vector search and retrieval concepts
• Familiarity with Gen‑AI frameworks/tools such as LangChain, LangGraph, MLflow, or workflow orchestration tools (e.g., n8n) hands‑on experience preferred, but deep ML expertise not mandatory
• Experience integrating Gen‑AI APIs (OpenAI, Gemini, Claude, etc.) into production applications
• Familiarity with at least one major cloud provider (AWS, GCP, or Azure)

This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required.

What we’ll provide you

By joining Citi, 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 discretional 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

Alongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self, every day. We want the best talent around the world to be energized to join us, motivated to stay and empowered to thrive.

Job Family Group:

Technology

Job Family:

Applications Development

Time Type:

Full time

Most Relevant Skills

Please see the requirements listed above.

Other Relevant Skills

For complementary skills, please see above and/or contact the recruiter.

Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their 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.