Senior Software Engineer (Java)

Join Keepit’s mission to secure the digital world, and build a Java engineering team from the ground up. About the role We are building a Java team in our Krakow office at Keepit, and we're looking for a Senior Java Engineer to help shape it from the ground up. You will work on our cloud-to-cloud backup platform: a distributed, high-availability system that protects the critical SaaS data of organizations worldwide. This role involves owning complex components and features end-to-end, while also driving key architectural decisions for greenfield Java backend projects. Proactiveness, initiative, and strong decision-making are essential for this role. We need someone who can set the bar, not just meet it. You will: Lead technical design and architecture for features and services, ensuring scalability and maintainability Participate in all phases of the software development lifecycle Collaborate with Product, QA, Support, and Operations teams to resolve issues and deliver improvements Maintain high code quality by clear documentation, thorough code review, and architectural improvements Ensure system reliability, including error handling, observability, and scalability Mentor and grow other developers; be the go-to technical authority on the team About you Must-haves: 5+ years of backend Java development experience Solid experience with the Spring Boot ecosystem, RESTful API design, and modern service-oriented architecture Experience working with KeyCloak, and good understanding of Authentication and authorization systems Solid understanding of SQL and working with relational databases Experience with docker and containerized solutions Familiarity with event-driven architecture (e.g. Kafka, RabbitMQ) Experience with CI/CD pipelines and modern DevOps practices Strong initiative and a proactive mindset, with a willingness to share knowledge in a collaborative environment Ability to work independently and take full ownership of technical decisions About us Our platform provides customers with an immutable, historical archive of their data in systems such as Microsoft 365, Google Workspace, Salesforce, Entra ID, Dynamics 365, and Zendesk. We protect our customers against everything, ranging from ransomware to simple accidents. The majority of our back-end components are written in clean, modern C++ using mainly purpose-built components. Components responsible for business processes and data mining are built using Common Lisp. Everything runs on Linux. We pride ourselves on backing up billions of objects over foreign APIs using imperfect networks on systems with finite memory and making it all happen in a performant, reliable, and predictable way. As we collaborate across locations, English is our primary language. Please submit your CV in English to support the review process. We offer: Official employment – Umowa o pracę contract Creative tax (KUP 50) 4 additional working days of vacation leave per full calendar year 3 days of internal sick leave without a doctor`s note Health and Life Insurance Employee Capital Plan (PPK) Multisport card compensation Coverage of professional training sessions, meetups, etc. English-speaking club with native speakers Polish language classes Internet and Glasses reimbursement Cosy office in Krakow city centre (Długa, 72) with beverages, fruit, and cookies Winter and summer parties, events, team-buildings We kindly ask you not to provide us with any sensitive categories of personal data when applying for a job with us. When applying for the vacancy, Keepit will process your personal data, and therefore we recommend that you also read our privacy policy , which describes our processing of personal data and your rights as a data subject. If you notice any misconduct or irregularities that fall within the scope of our whistleblowing procedure, please click here to report them.