Senior Java Developer
Inez
Gajewska
Backend engineer building scalable, resilient systems in Java & Spring Boot - and weaving AI and LLMs into modern architectures.
01
About
Senior Java Developer with 6+ years of experience, expert at building scalable backend systems and turning abstract requirements into high-performance applications. I actively bring AI and LLMs into daily engineering practice to streamline architecture and elevate code quality.
02
Experience
Aug 2025 - Present
Current role
Senior Backend Developer
PSE Innowacje
- Architecting and developing a highly scalable internal system with Java 21 and Spring Boot, focused on resilient microservices and REST APIs.
- Integrating AI technologies, LLM APIs and intelligent agents into modern backend architectures to automate complex organizational processes.
- Managing data persistence (Hibernate/JPA, SQL, Liquibase) and maintaining code quality through Unit/Integration testing (JUnit, Mockito) and SOLID principles.
- Automating CI/CD workflows with Jenkins and Docker, and translating complex business logic into precise technical specifications with stakeholders.
- Mentoring junior developers, conducting regular code reviews and onboarding new team members to foster engineering excellence.
Jan 2021 - Aug 2025
Regular Backend Developer
PSE Innowacje
- Developed backend applications and robust REST/SOAP APIs to integrate complex enterprise systems, including SharePoint and external data providers.
- Managed SQL databases (MySQL, MSSQL) and engineered custom backend components supporting enterprise-scale internal tooling and data efficiency.
- Led the full software development lifecycle - from gathering requirements and building POCs, through Agile/Scrum delivery, to active code reviews.
Jul 2020 - Jan 2021
Junior Software Engineer
PSE Innowacje
- Engineered backend logic and data-visualization components for voice assistant applications using Google Cloud technologies.
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Technical Skills
Languages
Java (8, 11, 17, 21)
C# (.NET)
JavaScript
TypeScript
Frameworks & ORM
Spring
Spring Boot
Hibernate
React
Databases
PostgreSQL
MySQL
MSSQL
Oracle DB
Liquibase
DevOps & CI/CD
Jenkins
Docker
GitHub Actions
Cloud
MS Azure
Google Cloud (GCP)
Testing & Build
JUnit
Mockito
Gradle
Maven
Integrations & Tools
REST APIs
UiPath
SharePoint
Git / GitHub
Methodologies
Agile / Scrum
Jira
Confluence
SOLID
04
Certifications
2025
AI Devs 3 Reloaded
LLM APIs, multimodal AI, AI agents and AI integrations.
2024
AI Devs 2
Connecting GPT-4 with application and automation logic.
2021
Sucuritum
Web application security and practical aspects of the S-SDLC process.
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Education & Languages
Education
Wrocław Business University of Applied Sciences
Bachelor of Computer Science
Languages
English
B2+
Polish
Native