Senior Software Engineer, Reference Data Platform (Python/Oracle)

Citi; Belfast City District; Hybrid; GBP 80,000 - 120,000; Full time

Benefits offered by this job

Hybrid work

Continuous learning

Career development

Competitive compensation

Job summary

Citi is seeking an experienced Applications Development Senior Programmer Analyst (AVP) to join the MRD technology group. You will design, develop and optimize the OMAI Fusion platform, focused on centralizing reference data using Python and Oracle databases.

You will work in a hybrid model, collaborating with global teams, ensuring high quality code, robust ETL pipelines and scalable architectures to support mission-critical enterprise operations.

Qualifications

• 5–8 years of professional experience in software engineering and application development.
• Strong hands-on proficiency in Python (3.x) for enterprise application development, data manipulation, object-oriented design and automated testing.
• Advanced proficiency with Oracle Database (12c/19c+), including complex SQL query design, PL/SQL programming, schema design, index optimization, query execution plan analysis and database performance tuning.
• Relational data modeling, Master Data Management (MDM) concepts, data normalization/denormalization and large-scale data ingestion and transformation pipelines.
• Version control with Git, CI/CD pipelines and automated testing frameworks (pytest, unittest).
• Excellent analytical and communication skills; ability to convey technical concepts to stakeholders.
• Bachelor’s degree in Computer Science, Software Engineering, Information Technology, or related field; or equivalent work experience.

Responsibilities

• Design, code, test and implement backend services, ETL data pipelines and batch/real-time processing components for the Fusion platform using Python.
• Architect, optimize and maintain complex Oracle databases; write, tune and maintain advanced SQL queries, stored procedures, PL/SQL packages, triggers and views to handle large volumes of reference data efficiently.
• Partner with analysts and data stewards to translate reference data requirements into scalable implementations.
• Identify bottlenecks and perform performance tuning across Python code and Oracle databases; implement partitioning and indexing strategies.
• Define and adhere to software development best practices, TDD, automated testing and code reviews.
• Work with CI/CD pipelines to support automated builds, deployments and environment configuration management.
• Assist in tier-3 production support and root-cause analysis for incidents; ensure compliance with security and governance standards.
• Provide mentorship and participate in Agile/Scrum ceremonies and sprint planning.

Skills

Python

Oracle SQL

Data modeling

CI/CD

Unit testing

Git

Communication

Education

Bachelor’s degree or equivalent experience

Job description

Role Overview

Citi is seeking an experienced and driven Applications Development Senior Programmer Analyst (C12 / AVP) to join our Master Reference Data (MRD) technology organization. In this role, you will be responsible for the design, development, testing and implementation of the Operating Model & Artificial Intelligence (OMAI) Fusion application - a critical enterprise platform responsible for centralizing, mastering and distributing high-quality reference data across Citi’s global business lines.

As a Senior Programmer Analyst, you will leverage your expertise in Python and Oracle database technologies to build high-performance data processing pipelines, optimize complex database architectures and deliver resilient software solutions that support mission‑critical enterprise operations.

Key Responsibilities

• Application & Pipeline Development: Design, code, test and implement robust backend services, ETL data pipelines and batch/real-time processing components for the Fusion platform using Python.
• Database Architecture & Optimization: Architect, optimize and maintain complex Oracle databases; write, tune and maintain advanced SQL queries, stored procedures, PL/SQL packages, triggers and views to handle large volumes of reference data efficiently.
• Master Reference Data Integration: Partner closely with business analysts, data stewards and upstream/downstream application teams to analyze reference data requirements and translate them into scalable technical implementations.
• System Performance & Scalability: Identify system bottlenecks, perform performance tuning across Python code and Oracle databases and implement partitioning, indexing and memory optimization strategies.
• Engineering Standards & Quality: Define and adhere to software development best practices, test-driven development (TDD), automated unit/integration testing and code review processes to maintain high code quality and reliability.
• CI/CD & DevOps Collaboration: Work with modern CI/CD pipelines to support automated builds, deployments and environment configuration management.
• Production Support & Risk Mitigation: Assist in tier-3 technical troubleshooting and root cause analysis for production incidents; ensure all implementations comply with Citi’s security, risk management and governance standards.
• Mentorship & Team Collaboration: Provide technical guidance and peer reviews to junior developers, actively participating in Agile/Scrum ceremonies and sprint planning.

Required Qualifications & Skills

• Experience: 5–8 years of professional experience in software engineering and application development, with a proven track record of delivering enterprise-scale systems into production.
• Python Expertise: Strong hands‑on proficiency in Python (3.x) for enterprise application development, data manipulation, object‑oriented design and automated testing.
• Oracle & SQL Mastery: Advanced proficiency with Oracle Database (12c/19c+), including complex SQL query design, PL/SQL programming, schema design, index optimization, query execution plan analysis and database performance tuning.
• Data Modeling & ETL: Strong understanding of relational data modeling, Master Data Management (MDM) concepts, data normalization/denormalization and large-scale data ingestion and transformation pipelines.
• Development Practices: Practical experience with version control systems (Git), continuous integration/continuous deployment (CI/CD) pipelines and automated testing frameworks (e.g., pytest, unittest).
• Problem Solving & Communication: Excellent analytical, troubleshooting and problem‑solving skills, with the ability to communicate technical concepts clearly to both technical peers and business stakeholders.
• Education: Bachelor’s degree in Computer Science, Software Engineering, Information Technology, or a related field; or equivalent relevant work experience.

Beneficial Skills & Qualifications

• Experience working within Financial Services, specifically with Master Reference Data, market data, instrument/counterparty reference data, or regulatory reporting systems.
• Experience with Python web frameworks and API design (FastAPI, Flask, or Django) for building internal data services and RESTful APIs.
• Familiarity with enterprise workload scheduling tools (e.g., Autosys, Airflow, Control‑M) and enterprise messaging systems (e.g., Apache Kafka, IBM MQ).
• Familiarity with containerization technologies (Docker, OpenShift, Kubernetes) and cloud infrastructure concepts.
• Experience in Linux/Unix shell scripting and automated deployment automation.

What We Offer

At Citi, you will work at the core of enterprise data management and financial services technology, contributing to critical platforms that operate at genuine global scale. This is an opportunity to take technical ownership, develop domain expertise in reference data systems and make a measurable impact within a collaborative, performance‑focused engineering environment.

• Hybrid Working Arrangement: Hybrid model with 3 days in the office and 2 days working remotely, offering flexibility while staying connected with your team.
• Continuous Learning & Growth: Access to comprehensive technical training, certifications and career development programs.
• Enterprise Impact: The opportunity to build and scale core reference data solutions that underpin trading, risk, compliance and reporting across global Citi franchises.
• Comprehensive Wellbeing & Compensation: Competitive financial compensation and benefits packages designed for experienced technology professionals, along with global wellness resources.

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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.

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