Junior Full Stack Developer

Citigroup · Warsaw · PLN 140,350–PLN 221,850 (stated in the posting)

Junior Full Stack Developer – Core Banking Reporting, Integration & AI Engineering

Role Overview

The Junior Full Stack Developer supports core banking reporting, application development, platform integration, AI enablement and production support activities across the reporting technology estate.

The role provides hands-on development experience across Python, Java, SAP BusinessObjects and AI technologies, contributing to the delivery of reporting solutions, intelligent automation, system integrations and enterprise applications within a complex financial services environment.

Role Summary

A full-stack developer with hands-on experience in Python, Java and SAP BusinessObjects, capable of delivering reporting solutions, application development, AI-enabled automation, system integrations and production support across the platform.

The role combines BusinessObjects reporting, reporting modernisation, Java integration development, Python engineering, AI solution development and operational support activities.

Responsibilities:

Application & Service Development: Design, build, and maintain full-stack application components, services, and RESTful APIs using Python and Java.
Core Banking Reporting Solutions: Develop, enhance, and schedule complex financial and operational reports utilizing SAP BusinessObjects and relational databases.
AI & Intelligent Automation: Assist in building and integrating AI-enabled tools, machine learning pipelines, and automated processing workflows to optimize reporting processes.
System Integration: Implement robust data exchange and system integration pipelines connecting core banking platforms, data warehouses, and reporting tools.
Production Support & Troubleshooting: Participate in level-2/level-3 production support activities, analyzing incidents, identifying root causes, and implementing bug fixes.
Code Quality & Testing: Write clean, modular, and maintainable code adhering to standard software engineering best practices, including unit and integration testing.
Database Management & Query Optimization: Write and optimize SQL queries, stored procedures, and data models to ensure high-performance reporting and data retrieval.
Collaboration & Agile Delivery: Work closely with cross-functional teams, business analysts, and senior engineers in an Agile/Scrum environment to deliver sprint objectives.
Technical Documentation: Maintain comprehensive documentation for system architectures, data flows, codebase changes, and operational runbooks.

Qualifications:

Education: Bachelor’s degree in Computer Science, Software Engineering, Information Technology, or a related quantitative field (or equivalent practical experience).
Programming Proficiency: Hands-on foundational programming experience with Python and Java.
Reporting & BI Tools: Practical exposure to or working knowledge of SAP BusinessObjects (Web Intelligence, Universe Design) or equivalent enterprise BI tools.
Database & SQL Skills: Solid understanding of relational database management systems (RDBMS) like Oracle, PostgreSQL, or SQL Server, with strong SQL querying skills.
API & Web Technologies: Basic understanding of web technologies (HTML, CSS, JavaScript) and building or consuming RESTful APIs/web services.
AI & Automation Familiarity: Foundational knowledge or strong interest in AI/ML concepts, LLM integration, or workflow automation tooling.
Version Control & CI/CD: Familiarity with Git version control and standard CI/CD deployment pipelines (e.g., Jenkins, GitLab CI).
Analytical & Problem-Solving Skills: Strong analytical mindset with the ability to troubleshoot complex technical issues and trace data discrepancies.
Communication & Teamwork: Excellent interpersonal and communication skills to collaborate effectively with both technical peers and business stakeholders.
Domain Awareness: Prior internship experience, academic coursework, or general interest in banking, fintech, or financial services reporting is an advantage.

What we can offer you:

By joining Citi Solutions Center Poland, you will not only be part of a business casual workplace with a hybrid working model (currently up to 2 days working at home per week), but also (potentially, subject to final offer) receive a competitive base salary and enjoy a whole host of additional benefits which can include:

Employer paid Defined Contribution Pension Plan contribution of 6% of employee’s pensionable earnings (PPE Program)
Employer paid Private Medical Care Package for employees and Private Medical Care Packages for certain family members available at preferential rates
Employer paid Life Insurance Program for employees and Life Insurance for certain family members available at preferential rates
Employee Assistance Program financed by Employer
Paid Parental Leave Program (maternity and paternity leave; statutory and 2 weeks additional paid paternity leave)
Sport Card for employees subsidized via Social Benefits Fund and Sport Cards for certain family members available at preferential rates
Additional benefits from Company’s Social Benefit Fund, in particular: Holidays Allowance, support for sport and cultural activities, team building events.
Additional day off for volunteering
Cafeteria/ flex benefit – a company benefits system which enables employees to select and purchase benefits offered by a provider and available for employees on the platform.
Opportunity to receive an annual discretionary incentive award
Special offers and discounts for employees
Copy and paste the URL below into a new tab on your web browser to view the Remuneration Regulations extract: https://tbcdn.talentbrew.com/company/287/cms/v3/docs/policies/RemunerationRegulations-KeyProvisions-CitibankEurope_plc_05012025_A.pdf

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.

Sounds like Citi has everything you need? Then apply to discover the true extent of your capabilities.

#LI-KK5

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

Junior Full Stack Developer – Core Banking Reporting, Integration & AI Engineering

Key Responsibilities

Python Development

Develop and maintain Python applications and reporting solutions.
Build reusable components for report execution, data extraction and transformation.
Develop configuration-driven reporting solutions.
Implement logging, monitoring and exception handling capabilities.
Develop automated unit and integration tests.
Participate in technical design discussions and code reviews.

Java Development

Develop and maintain Java applications, APIs and integration services.
Develop reusable application components and services.
Design and support REST-based integrations.
Support automated testing and quality assurance activities.
Investigate and resolve application issues and defects.

BusinessObjects Reporting

Develop and maintain SAP BusinessObjects reports.
Analyse report logic, filters, prompts and business rules.
Support migration of BusinessObjects reports to modern reporting platforms.
Perform report validation, reconciliation and variance analysis.
Resolve reporting discrepancies and data issues.

Database & Data Engineering

Build and optimise Oracle SQL queries and database components.
Support development of data extraction and reporting solutions.
Analyse and understand reporting data models.
Apply data validation, reconciliation and quality controls.
Assist with performance optimisation of reporting workloads.

Integration & Reporting Services

Develop REST APIs and enterprise integrations.
Support reporting, reconciliation and data validation activities.
Support integration between core banking platforms and downstream reporting consumers.
Assist with batch and service-based reporting solutions.
Contribute to reporting modernisation initiatives.

Production Support

Investigate and resolve application, reporting and production issues.
Support deployment, release and operational activities.
Support production monitoring and operational controls.
Participate in incident investigation and root cause analysis.
Maintain technical and operational documentation.

AI & Agent Engineering Responsibilities

Develop AI-enabled utilities, automation and reporting solutions.
Build and maintain AI agents to support reporting, analysis and operational processes.
Develop Python-based AI integrations and automation workflows.
Support Retrieval-Augmented Generation (RAG) implementations.
Integrate AI services with reporting platforms and enterprise applications.
Participate in prompt engineering, testing and evaluation of AI solutions.
Support implementation of governance and monitoring controls for AI-enabled applications.
Identify opportunities to automate manual processes using AI technologies.
Support development of Copilot-based solutions and AI-powered productivity tools.
Contribute to experimentation and adoption of emerging AI engineering practices.

Essential Skills & Experience

1-5 years of software development experience.
Hands-on experience with Python development.
Hands-on experience with Java development.
Experience with SQL and relational databases.
Exposure to SAP BusinessObjects development or reporting.
Oracle database experience.
REST API and integration experience.
Linux/Unix experience.
Git and source control experience.
Strong analytical and problem-solving skills.
Understanding of software engineering and object-oriented programming principles.
Experience developing or supporting reporting applications.
Exposure to AI-assisted development tools such as GitHub Copilot, Microsoft Copilot or equivalent technologies.

Desirable Skills

FLEXCUBE experience.
Core banking platform exposure.
Financial services experience.
Spring Boot.
Pandas.
AutoSys.
CI/CD.
Docker.
Kubernetes/OpenShift.
Kafka.
Experience building AI agents.
LangChain, Semantic Kernel, AutoGen or similar frameworks.
Azure AI or OpenAI services.
RAG solutions and vector search concepts.
Copilot Studio or equivalent AI platforms.
AI governance and responsible AI practices.
Data quality and reconciliation experience.
Regulatory reporting experience.

Personal Attributes

Strong analytical and troubleshooting capability.
Attention to detail and data accuracy.
Collaborative and team-oriented.
Good communication skills.
Strong ownership and delivery focus.
Willingness to learn and develop new technical skills.
Strong interest in AI, automation and modern engineering practices.
Ability to work effectively with architects, business analysts, SMEs and development teams.
Commitment to quality, reliability and operational resilience.

Education

Degree or equivalent experience in:

Computer Science
Software Engineering
Information Technology
Mathematics
Engineering
Related technical discipline

Experience Level

Junior Developer with 1-5 years of software development experience, including practical experience in Python, Java and reporting technologies.

Experience within financial services, enterprise reporting environments, AI-enabled development, core banking platforms or SAP BusinessObjects solutions is advantageous but not mandatory.

Technology Stack

Programming Languages

Python
Java
SQL

Reporting Technologies

SAP BusinessObjects
Enterprise Reporting Platforms

Databases

Oracle Database

Frameworks & Integration

Spring Boot
REST APIs
Enterprise Integration Services

AI Technologies

AI Agents
Retrieval-Augmented Generation (RAG)
Azure AI
OpenAI Services
Microsoft Copilot
GitHub Copilot
Copilot Studio
LangChain
Semantic Kernel

Platforms & Tools

Git
CI/CD
Linux/Unix
AutoSys

Desirable Technologies

FLEXCUBE
Docker
Kubernetes/OpenShift
Kafka

------------------------------------------------------

Job Family Group:

Technology

------------------------------------------------------

Job Family:

Applications Development

------------------------------------------------------

Time Type:

Full time

------------------------------------------------------

Primary Location Full Time Salary Range:

140 350,00 zł - 221 850,00 zł

------------------------------------------------------

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.

More jobs at Citigroup · Software Engineering jobs in Warsaw