Piotr Kaźmierczak

Team Leader | Senior Software Engineer | DDD Enthusiast

Wrocław, Dolnośląskie, Poland

About

Experience

  • Team Leader at Hyand Group
    Aug 2023 - Present · 2 yrs 11 mos

    A senior engineer with team-level ownership on the design, delivery, and maintenance of business-critical systems, combining hands-on development with technical leadership and stakeholder communication. Took ownership of feature design and implementation end-to-end, from refining requirements and estimations to delivery and post-release support, with a strong focus on pragmatic and maintainable solutions Actively supported the team in technical decision-making, code reviews, and architectural discussions, helping balance solution quality with time and budget constraints Led estimation and planning discussions, translating business expectations into realistic technical scope and delivery plans Improved stability of existing systems through targeted refactoring, bug fixing, and test coverage, reducing recurring issues and operational overhead Led and actively contributed to an internal Community of Practice, facilitating technical discussions, knowledge sharing, and alignment on best practices across teams Conducted technical interviews, assessing both technical competence and problem-solving approach, and supporting hiring decisions for the team Mentored developers through regular feedback, code reviews, and knowledge sharing, increasing team autonomy and confidence Maintained clear communication with clients and stakeholders, aligning technical choices with business priorities and constraints Technologies: Java & Spring Boot (primary backend), Angular (UI when needed), Python (supporting services and automation), relational & non-relational databases. Experienced in blending low-code and full-code solutions to deliver pragmatic, maintainable systems.

  • GOD Nearshore SE (5 yrs 3 mos)
    • Team Leader
      Jul 2022 - Jul 2023 · 1 yr 1 mo

      Worked as a senior full-stack software engineer delivering and maintaining web applications, with a strong focus on back-end development and pragmatic end-to-end solutions aligned with business needs. Acted as a senior team member supporting technical discussions and contributing to shared engineering standards Translated business requirements into technical solutions, including requirement clarification, effort estimation, and implementation Delivered new features across back-end services and web interfaces, primarily using Java 8 / Spring Boot and Angular, ensuring consistency and maintainability across the stack Implemented and maintained user-facing web interfaces using TypeScript supporting end-to-end functionality when required Maintained high code quality through regular code reviews and automated testing, including unit and integration tests Improved stability and reliability of existing systems through bug fixing, refactoring, and incremental enhancements

    • Senior Software Engineer
      Mar 2021 - Jun 2022 · 1 yr 4 mos

    • Full-stack Developer
      May 2018 - Mar 2021 · 2 yrs 11 mos

  • Atos IT Solutions and Services A/S (Wrocław, woj. dolnośląskie, Polska)
    • Application Developer
      Oct 2017 - Apr 2018 · 7 mos

      Main technologies : - Java 8, Spring, Hibernate, SQL, Oracle, MSSQL, JBoss, REST Tools: - Eclipse, SQLDeveloper, RTC, Jazz, JIRA, Confluence, Jenkins Responsibilities: - Deputy Team Leader, - Specification and implementation of requirements, - Implementation of new features, - Implementation of data transformation, - Implementation of web interfaces using DSL, - Code review, - Testing, - Maintenance: bug fixing, - Support during environment set up

    • Junior Application Developer
      Jan 2017 - Oct 2017 · 10 mos

      Main technologies : - Java 8, Spring, Hibernate, SQL, Oracle, MSSQL, JBoss, REST Tools: - Eclipse, SQLDeveloper, RTC, Jazz, JIRA, Confluence, Jenkins Responsibilities: - Specification and implementation of requirements, - Implementation of new features, - Implementation of data transformation, - Implementation of web interfaces using DSL, - Testing, - Maintenance: bug fixing, - Support during environment set up

  • Full-stack Student Internship at Redknee
    Jul 2016 - Sep 2016 · 3 mos

    I have been working in a small team of student on the internal project. I was mainly focused on front-end issues. However i have also worked with backend. We have used Anuglar 2 + Typscript as a front-end and Java with Spring on the back-end. Responsibilites: - Creating a web application, - REST API, - Specification and implementation of requirements , - Implementation of web interface, - Testing : junits, E2E

  • C++ internship at Teleste
    Apr 2016 - May 2016 · 2 mos

    It was a part-time internship. I have been working mainly on refactoring huge a project. It was supposed to prepare me for future work within a real project.