Software Developer Oracle, PL/SQL

Who Are We

Hansen Technologies is a leading global provider of software and services that enable organisations to transform customer experiences and streamline critical business processes. With a rich history of innovation and a footprint that spans over 80 countries, Hansen empowers utilities, energy, and communications companies to thrive in an ever-evolving digital landscape. Our commitment to excellence, customer focus, and collaborative culture makes Hansen a place where passionate professionals can make a meaningful impact, drive real change, and help shape the future of industries worldwide.

We are proud to be an equal opportunities employer. Hansen prides itself on celebrating diversity and is committed to creating an inclusive environment for all employees, even extending this to how we work with our customers, partners, and suppliers. We welcome applications from all qualified candidates, regardless of age, disability, gender identity or expression, marital status, race, ethnicity, religion or belief, sexual orientation, or any other protected characteristic. If you require any adjustments or accommodation during the recruitment process, please let us know.

Why This Role Matters

Build. Integrate. Modernise. Deliver.

At Hansen, we're helping communications providers deliver seamless experiences to millions of customers. As a Software Developer within our CCB-HU team, you'll play a key role in developing and modernising enterprise-scale solutions that support billing, subscription management, order fulfilment, and customer account services.

This is an exciting opportunity for developers who enjoy working across multiple technologies, solving real business challenges, and contributing to the evolution of large-scale enterprise platforms.

What You'll Do

• Develop and deliver full-stack features across backend and frontend applications as part of an Agile Scrum team.
• Design, build, and integrate RESTful APIs supporting customer management, subscriptions, orders, payments, and billing services.
• Develop and maintain Oracle database components, including PL/SQL packages, stored procedures, triggers, and views.
• Participate in software design, coding, testing, deployment, and ongoing application support.
• Create and maintain technical documentation, architecture diagrams, and solution designs.
• Apply secure coding standards and support compliance with information security best practices throughout the SDLC.
• Contribute to platform modernisation, cloud migration initiatives, and continuous improvement activities.
• Take ownership of technical issues and proactively deliver solutions across the full technology stack.

What You Bring

• 3+ years of software development experience in enterprise application environments.
• Strong backend development skills using Java/Jakarta EE.
• Experience building RESTful APIs using JAX-RS, Jackson, and OpenAPI (Swagger).
• Solid understanding of Hibernate ORM, JPA, and relational database design principles.
• Strong Oracle SQL and PL/SQL experience, including stored procedures, packages, triggers, and views.
• Experience with Git-based source control and collaborative development practices.
• Understanding of unit and integration testing frameworks such as JUnit, Mockito, and Rest-Assured.
• Working knowledge of Docker, Docker Compose, Maven, or Gradle.
• Exposure to React and TypeScript, or a genuine interest in developing modern frontend applications.
• Exposure to .NET/C# development and systems integration, or willingness to develop these skills.

Nice to have

• Experience with Quarkus or Jakarta EE application servers such as Payara.
• Knowledge of AWS cloud services including ECS, EC2, ECR, S3, CloudWatch, and Secrets Manager.
• Experience building and maintaining CI/CD pipelines using Jenkins.
• Familiarity with OAuth 2.0, JWT authentication, and secure API design.
• Experience with React ecosystems including Material UI, Vite, and TypeScript tooling.
• Exposure to observability and monitoring platforms such as Dynatrace.
• Experience with automation testing tools such as Robot Framework or Playwright.
• Telecommunications domain experience, particularly within billing or subscription management platforms.
• Passion for continuous improvement, learning new technologies, and working in a collaborative global environment.

• Competitive Market Rate Salary - full salary (including SI contribution) during the probation period and 13th-month salary
• Twice yearly salary review
• Full participation in the annual Hansen Profit Share Program
• Great Leave Options - including 12 days annual leave during Year 1, increasing to 15 days annual leave and 12 days paid sick leave per year).
• Premium healthcare for employee and dependents (spouse and {all} children and support for parents). Also, free comprehensive annual check-up for employees.
• High-speed Internet credit: VND 5,5million/year
• Wellness benefit: VND 2million annually for fitness package/devices
• Free lunch, snacks, and drink in our new modern offices, which have a cool open atmosphere with an outdoor cafe, bar, and recreation area in District 2 - including free scooter parking
• Continuous Learning and Development, including personalised Udemy Business - online learning platform.
• Reward and Recognition - Company sponsored trips and events, tenure milestones and global recognition program.
• New, modern developer laptop, 2 large monitors, and headset.
• An international work environment, highly skilled colleagues to learn from both locally and globally where you can develop your IT career and English skills.