Software Engineer, Officer
State Street23 days ago
Kraków, PolandMid Level / Senior
Responsibilities
- Build and maintain backend service-layer components, domain services, orchestration, integrations, APIs, and persistence logic.
- Implement authentication, authorization, request validation, error handling, secure API contracts, and scalable service designs.
- Develop event-driven, asynchronous messaging, batch, and streaming integration patterns using tools such as Kafka and MQ.
- Optimize database queries and data models for performance and reliability.
- Develop and maintain React.js and TypeScript UI features with modern state-management and component patterns.
- Collaborate with design and UX teams to build reusable, accessible, and responsive interfaces.
- Integrate user interfaces with backend services and implement client-side validation and error handling.
- Apply unit and integration testing, code-quality practices, CI/CD, and modern DevOps practices.
- Collaborate with stakeholders across functions and geographies to deliver technology solutions.
Requirements
- Bachelor's degree or foreign education equivalent in Computer Science, Engineering, Mathematics, Physics, or another technical field.
- 3–5 years of related professional experience.
- Master's degree is strongly preferred.
- Proficiency in one or more backend technology stacks and experience building service layers and REST APIs.
- Experience with Node.js, Express or NestJS, TypeScript, Java, or Spring Boot.
- Experience with React.js, modern JavaScript/TypeScript, component patterns, and API integration.
- Experience with PostgreSQL, SQL Server, MySQL, MongoDB, and data modeling.
- Strong unit-testing and integration-testing discipline.
- Ability to analyze information independently and collaborate effectively with stakeholders.
- Strong written and verbal communication skills; English proficiency is required.
- Willingness to enter into an employment contract.
Benefits
- Hybrid work model balancing home and office work.
- Permanent contract from day one.
- Additional holidays, including birthday and work-anniversary days off.
- Gold medical package for employees and their families.
- Premium life insurance package and private pension plan.
- Soft-skills training, technical workshops, language classes, and development programs.
- Opportunities to volunteer through company initiatives, employee networks, or other organizations.
- Well-being programs and additional benefits depending on seniority.
- Discretionary annual performance-based awards may be available in addition to salary.
Tech Stack
Apache KafkaExpressJavaJavaScriptMicrosoft SQL ServerMongoDBMySQLNestJSNode.jsPostgreSQLReactSpring BootSQLTypeScript
Categories
About State Street
State Street is a global custodian bank and asset manager serving institutional investors with investment servicing, fund accounting, trading/FX, data, and index/active strategies. Its products include State Street Global Advisors’ funds and ETFs, the Charles River Investment Management Solution, and the front-to-back State Street Alpha platform. Founded in 1792 and headquartered in Boston, the company is publicly traded on the NYSE (ticker: STT) and operates across major markets worldwide.