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QI
QIAGEN

Senior Backend Software Engineer (Java)

LocationCluj-Napoca
Work modeon-site
SenioritySenior
Experience5+ yrs
Company size10,000+ people
First seenOct 6, 2026 · 6d ago
Verified live1d ago
At a glanceSummarised by Seekless from the posting.
Must have8
5+ years of professional software development experience
Strong expertise developing production-grade applications using Java (Java 21+)
Solid understanding of object-oriented design principles, software architecture patterns, and engineering best practices
Experience designing, building, and operating distributed backend systems with a focus on scalability, reliability, and performance
Strong experience designing, developing, and consuming REST APIs
Experience with concurrency, asynchronous programming, data processing, and backend testing frameworks such as JUnit, Mockito, or similar
Hands-on experience working with relational databases (SQL)
Proficiency with Git-based development workflows, code reviews, and collaborative software engineering practices
Nice to have3
Working knowledge of Python for scripting, automation, or data processing
Experience with event-driven and streaming architectures
Exposure to healthcare, biotech, or other regulated software environments, with familiarity with CI/CD practices
Skills
Java
Python
REST APIs
JUnit
Mockito
SQL
Git
CI/CD
Benefits
Bonus
Referral program
Volunteer day
Employee assistance program
Overview
At QIAGEN, we are driven by a simple but powerful vision: making improvements in life possible.
We’re dedicated to revolutionizing science and healthcare for the better. From our entrepreneurial roots to our current global presence, we’ve grown into a force for positive change. With thousands of employees across six continents, collaboration is our greatest strength. We’re always striving to identify talented individuals to join our exceptional teams.
We have played a pivotal role in shaping modern science and healthcare, and we’re just getting started. If you’re someone who thrives on new challenges, values diversity and wants to make a tangible difference in people’s lives, then QIAGEN is the place for you.
At QIAGEN, every day is an opportunity to make a real-life impact.
Join us, grow with us, and together, let’s shape the future of biological discovery.
About the opportunity
At QIAGEN Digital Insights (QDI), we develop industry-leading bioinformatics software and curated knowledge bases that help researchers, laboratories, and clinicians transform molecular data into actionable insights.
As a Senior Engineer, you will take ownership of building and evolving server-side systems and data-intensive services, primarily using Java. You will work on distributed systems, APIs, and processing pipelines that support complex clinical and research workflows. This is not a typical CRUD back-end role – the focus is on scalability, correctness, performance, and reliability in a regulated domain. Exposure to Java, object-oriented programming, and Python is a plus, since parts of our backend ecosystem use these technologies. You will also play a key role in technical decisions, mentoring, and raising back-end engineering standards within the team.
Your tasks
•
Design, develop, and enhance scalable backend services and distributed systems using Java and related technologies
•
Build and evolve APIs, processing pipelines, and platform services that support genomic and biomedical data workflows
•
Drive technical architecture decisions with a focus on scalability, reliability, performance, and maintainability
•
Collaborate closely with Product Management, Frontend Engineering, DevOps, and other cross-functional teams to deliver high-quality solutions
•
Implement automated testing practices and maintain high engineering standards through code reviews and engineering best practices
•
Mentor engineers and contribute to the continuous growth of engineering capabilities within the team
•
Support technical discovery activities, solution design discussions, effort estimations, and feasibility assessments
Your profile
•
5+ years of professional software development experience, with strong expertise developing production-grade applications using Java (Java 21+)
•
Solid understanding of object-oriented design principles, software architecture patterns, and engineering best practices
•
Experience designing, building, and operating distributed backend systems with a focus on scalability, reliability, and performance
•
Strong experience designing, developing, and consuming REST APIs
•
Experience with concurrency, asynchronous programming, data processing, and backend testing frameworks such as JUnit, Mockito, or similar
•
Hands-on experience working with relational databases (SQL)
•
Proficiency with Git-based development workflows, code reviews, and collaborative software engineering practices
Nice to have
Nice to have:
•
Working knowledge of Python for scripting, automation, or data processing, alongside experience with event-driven and streaming architectures
•
Exposure to healthcare, biotech, or other regulated software environments, with familiarity with CI/CD practices
What we offer
•
Bonus/Commission
•
Local benefits
•
Referral Program
•
Volunteer Day
•
Internal Academy (QIALearn)
•
Employee Assistance Program
•
Hybrid work (conditional to your role)
Our people are the heartbeat of everything we do. Passion drives us as we push boundaries to innovate and evolve. We inspire with our leadership and make an impact with our actions. We cultivate a collaborative, supportive environment where each individual and team can flourish. We champion accountability and encourage entrepreneurial thinking.
Legal
QIAGEN is committed to creating a diverse environment and is proud to be an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, sex, age, national origin, religion, sexual orientation, gender identity, status as a veteran, or disability.
More roles at QIAGEN
Accountant, Accounts ReceivableManager Business AnalyticsSales CoordinatorSenior Software Architect (f/m/d) - Life Science and DiagnosticsAI Engineer (f/m/d) - Life Science and Diagnostics (f/m/d)
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