Java Backend Developer

Qualysoft
Bucharest, Romania
Remote

Who this role is best for

Strong fit for Java developers with experience in event-driven systems and API integration who thrive in collaborative, cross-functional environments. The role emphasizes technical depth in Java 21, Spring Boot, and Apache Kafka, with opportunities for international exposure and growth in a stable, multinational organization.

Best fit for

  • Java developers experienced in event-driven architectures and API integration who value cross-functional teamwork
    — “Implement and maintain event-driven architectures using Apache Kafka for asynchronous communication between services.”
  • Candidates with a background in SQL database design and optimization for enterprise systems
    — “Work with SQL databases, including database design, query optimization, and data persistence.”
  • Individuals interested in contributing to scalable systems within a global and local reach environment
    — “Global and local reach – trusted by key industry players in Europe and the US.”

Things to consider

  • The role may require adapting to a variety of industries, including banking and finance.
    — “Cross-industry experience by sustaining global players in BSFI (Banking, financial services and insurance), Telecom, Retail & E-commerce, Energy and Utilities, Automotive, Manufacturing, Logitics, High Tech.”
  • Candidates should be prepared to work in a containerized environment and with DevOps practices.
    — “Contribute to application deployment, monitoring, and maintenance in containerized environments.”

How to stand out

  • Highlight experience with Java 21 and Spring Boot in backend development on your resume.
    — “Design, develop, and maintain scalable backend applications using Java 21 and Spring Boot.”
  • Demonstrate your proficiency in building and integrating REST and SOAP APIs during interviews.
    — “Develop and integrate REST and SOAP APIs to enable communication between internal and external systems.”
  • Showcase your ability to debug and optimize backend systems for performance and scalability.
    — “Troubleshoot, debug, and optimize backend applications to improve performance, stability, and scalability.”
  • Emphasize your contributions to automated testing using TestContainers in your application materials.
    — “Develop and maintain automated integration tests using TestContainers to ensure application reliability and quality.”
Pace · SteadyCollaboration · HighAutonomy · MediumDecision Impact · Team

Derived from job-description analysis by Serendipath's career intelligence engine.

What success looks like

  • design, develop, and maintain scalable backend applications
  • develop and integrate APIs
  • implement event-driven architectures
  • work with SQL databases
  • develop automated integration tests
Typical background
experience in software engineeringknowledge of Java 21 and Spring Bootunderstanding of REST and SOAP APIs

Skills & requirements

Required

Java 21Spring BootREST And SOAP ApisApache KafkaSQL DatabasesAutomated Integration TestsTestcontainersTroubleshootingDebuggingOptimizationCollaborationCode ReviewsApplication DeploymentMonitoringMaintenance

Stack & domain

JavaSpring BootRESTSOAPApache KafkaSQLTestcontainersDevOpsAIData & AnalyticsCloudIotTest AutomationTeamworkProblem-solvingCommunicationContinuous ImprovementCollaborationBackend Development

About the role

Original posting from Qualysoft via Lever

About Qualysoft

·        25 years of experience in software engineering, established in Vienna, Austria

·        Active in Romania since 2007, with office in central Bucharest (Bd. Iancu de Hunedoara 54B)

·        Delivering End to End IT Consulting Services  - From Team Augmentation and Dedicated Teams to Custom Software Development 

·        We deliver scalable enterprise systems, intelligent automation frameworks, and digital transformation platforms

·        Cross-industry experience by sustaining global players in BSFI (Banking, financial services and insurance), Telecom,Retail & E-commerce, Energy and Utilities, Automotive, Manufacturing, Logitics, High Tech

·        Global Presence: Switzerland, Germany, Austria, Sweden, Hungary, Slovakia, Serbia, Romania, and Indonesia

·        International team of 500+ software engineers

·        Strategic partnerships: Microsoft Cloud Certified Partner, Tricentis Solutions Partner in Test Automation and Test Management, Creatio Exclusive Partner, Doxee Implementation Partner

·        Powered by cutting-edge technologies: AI, Data & Analytics, Cloud, DevOps, IoT, and Test Automation.

·        Project beneficiaries ranging from large-scale enterprises to startups

·        Stable growth and revenue increase year over year, a resilient organisation in volatile IT market conditions

·        Quality-first mindset, culture of innovation, and long-term client partnerships

·        Global and local reach – trusted by key industry players in Europe and the US

Responsibilities:

  • Design, develop, and maintain scalable backend applications using Java 21 and Spring Boot. 
  • Develop and integrate REST and SOAP APIs to enable communication between internal and external systems.
  • Implement and maintain event-driven architectures using Apache Kafka for asynchronous communication between services.
  • Work with SQL databases, including database design, query optimization, and data persistence.
  • Develop and maintain automated integration tests using TestContainers to ensure application reliability and quality. 
  • Troubleshoot, debug, and optimize backend applications to improve performance, stability, and scalability.
  • Collaborate with cross-functional teams, including developers, QA engineers, and business analysts, to deliver reliable software solutions.
  • Participate in code reviews, technical discussions, and continuous improvement of development practices. 
  • Contribute to application deployment, monitoring, and maintenance in containerized environments. 

Qualifications:

  • Design, develop, and maintain scalable backend applications using Java 21 and Spring Boot.
  • Develop and integrate REST and SOAP APIs to enable communication between internal and external systems.
  • Implement and maintain event-driven architectures using Apache Kafka for asynchronous communication between services.
  • Work with SQL databases, including database design, query optimization, and data persistence.
  • Develop and maintain automated integration tests using TestContainers to ensure application reliability and quality.
  • Troubleshoot, debug, and optimize backend applications to improve performance, stability, and scalability. 
  • Collaborate with cross-functional teams, including developers, QA engineers, and business analysts, to deliver reliable software solutions.
  • Participate in code reviews, technical discussions, and continuous improvement of development practices.
  • Contribute to application deployment, monitoring, and maintenance in containerized environments. 

Nice to have:

  • Hands-on experience with OpenShift or Kubernetes for container orchestration and application deployment.
  • Previous experience in banking or financial services, particularly with banking system integrations. 
  • Understanding of transaction processing, data consistency, and secure communication between financial systems.
  • Familiarity with Docker and cloud-native application development. 

    What We Offer

·        Premium medical package

·        Lunch Tickets & Pluxee Card

·        Bookster subscription

·        13th salary/yearly bonuses

·        Enterprise job security with a startup mentality (diverse & engaging environment, international exposure, flat hierarchy) under the stability of a secure multinational

·        A supportive culture (we value ownership, autonomy, and healthy work-life balance) with great colleagues, team events and activities

·        Flexible working program and openness to remote work

·        Collaborative mindset – employees shape their own benefits, tools, team events and internal practices

·        Diverse opportunities in Software Development with international exposure

·        Flexibility to choose projects aligned with your career path and technical goals

·        Access to leading learning platforms, courses, and certifications (Pluralsight, Udemy, Microsoft, Google Cloud)

·        Career growth & learning – mentorship programs, certifications, professional development opportunities, and above-market salary

*We are an equal opportunity employer and value diversity. All employment decisions are made without regard to age, gender, disability, race, ethnicity, religion, sexual orientation, or any other protected characteristic. We encourage applicants from all backgrounds to apply.*

Source: Qualysoft careers (Lever)

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