Senior Full Stack Engineer

Ciklum is looking for a Senior Full Stack Engineer to join our team full-time in Poland.

We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live.

About the role:

As a Senior Full Stack Engineer, you will be a key technical contributor within the "Billing Enabling" team, which currently consists of eight people. Your role will be focused on supporting the operational reliability of our existing invoicing solution, KUREPO (Kunden REchnung POst). This solution is a custom development based on Oracle Forms. You will also work on the ZLF (ZukunftsLösung Fakturierung) and potentially the BDH (Billing Data Hub) projects. The long-term goal is to eliminate or replace all Oracle developments by 2030, and this position may be needed until then, with annual contract extensions. You will be working closely with the "Billing Core"  team, and both teams share the same Product Owner and Scrum Master. The teams work together and follow the SAFe agile method. Your role will be pivotal in all stages of the development lifecycle, from architecting solutions and making key technical decisions to mentoring team members and ensuring the delivery of high-quality, scalable features.

Responsibilities:

• Support and ensure the operational reliability of the KUREPO invoicing solution
• Design and implement scalable, resilient, and maintainable systems for our applications
• Drive technical decisions and promote best practices in coding, testing, and deployment
• Collaborate closely with Product and Design to translate business requirements into robust technical solutions
• Proactively identify and address technical debt, performance bottlenecks, and areas for system improvement
• Mentor and guide team members, fostering a culture of technical excellence and continuous improvement

Requirements:

• 5+ years of professional experience in full-stack web development
• Proven experience in designing and architecting scalable, distributed systems
• Strong knowledge of Java / Spring with experience in REST API, jUnit, Swagger, XML/JSON, and development tools like IntelliJ, Jenkins, and Git
• Proficient with Angular, including TypeScript, HTML/CSS, and Node.js
• Strong SQL skills and experience with databases such as Oracle, PostgreSQL, or MongoDB
• Experience with agile methodologies (SAFe, Scrum), as well as project management and documentation tools like Jira / Confluence.
• Fluent in German (B2/C1), both written and spoken, in a professional context
•  Upper-intermediate or higher level of spoken and written English

Desirable:

• Experience with Kafka for event-streaming and microservices architectures
• Knowledge of PL/SQL / Oracle DB is a plus, given the context of replacing legacy systems
• Experience with Docker / Kubernetes / AWS for deployment and cloud- native applications
• Familiarity with monitoring and logging tools like Grafana / Splunk
• Experience with test automation using Robot Framework

What's in it for you?

• Strong community: Work alongside top professionals in a friendly, open-door environment
• Growth focus: Take on large-scale projects with a global impact and expand your expertise
• Tailored learning: Boost your skills with internal events (meetups, conferences, workshops), Udemy access, language courses, and company-paid certifications
• Endless opportunities: Explore diverse domains through internal mobility, finding the best fit to gain hands-on experience with cutting-edge technologies
• Flexibility: Enjoy flexibility – full remote working possibilities
• Care: We’ve got you covered with company-paid medical insurance, mental health support, and financial & legal consultations

About us:

At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you’ll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress.With delivery centers in Wrocław and Gdańsk, our 300+ professionals in Poland drive forward-thinking solutions for global clients. Join a community where collaboration sparks innovation—and your impact reaches millions.

Want to learn more about us? Follow us on Instagram, Facebook, LinkedIn.

Explore, empower, engineer with Ciklum!

Experiences of tomorrow. Engineered together

Interested already?We would love to get to know you! Submit your application. Can’t wait to see you at Ciklum.