Full-Stack Engineer

We are seeking an experienced, hands-on Lead Software Engineer to drive the design, development and modernization of enterprise-scale applications. The role requires strong expertise in Angular and Java/Spring Boot, combined with the ability to provide technical leadership, guide engineering teams and deliver high-quality software solutions. The successful candidate will work closely with engineering management, architects and other technical leads to develop scalable, maintainable applications, support external engineering resources and contribute to AI-enabled capabilities. Key Responsibilities Design, develop, and maintain scalable backend services and APIs using Java and Spring Boot. Build modern, responsive frontend applications using Angular and TypeScript. Implement complex business logic, integrations, and data processing workflows. Write clean, efficient, testable code with strong unit and integration test coverage. Diagnose and resolve complex application defects, performance bottlenecks, and production issues. Work extensively with relational databases, including SQL query development and optimisation. Contribute directly to the codebase through feature development, refactoring, debugging, and technical improvements. Participate in technical design, code reviews, CI/CD and deployment activities. Own features end-to-end, from technical design and coding through testing, deployment, and production support. Required Technical Skills Strong, recent professional experience developing applications with Java, Spring Boot, and REST APIs . Proven expertise building frontend applications with Angular, TypeScript, and RxJS . Strong understanding of object-oriented design, data structures, algorithms, and software engineering fundamentals. Practical experience with SQL databases, transactions, and performance optimisation. Solid experience with automated testing, Git, CI/CD pipelines, and containerised applications. Demonstrated ability to independently design, implement, debug, and deliver complex software features. Education: Bachelor’s degree/University degree or equivalent experience Master’s degree preferred We offer: 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 subsidised 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. ------------------------------------------------------ Job Family Group: Technology ------------------------------------------------------ Job Family: Systems & Engineering ------------------------------------------------------ Time Type: Full time ------------------------------------------------------ Primary Location Full Time Salary Range: zł241,750.00 - zł411,650.00 ------------------------------------------------------ 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.