Java & SQL Developer - Data Focused Applications

Belden; Denmark; On-site; DKK 411,000 - 598,000; Full time

Job summary

Belden Inc is looking for a mid-level Java & SQL Developer focused on data-driven applications. The role centers on backend development, data processing and maintaining existing systems while enabling migrations and upgrades. You will join a hybrid, full-time team based in Venlo, NL, contributing to innovative digitization initiatives.

You will work with Java, Swing and MS SQL Server, tackling data transformation, query optimization and collaboration with global teams to deliver robust solutions.

Qualifications

• Java Development experience – 3+ years, including Java Swing.
• SQL & Database knowledge – MS SQL Server experience with query optimization.
• Analytical and problem-solving skills for troubleshooting complex backend systems.
• Collaboration and communication with technical teams, business stakeholders and end users.
• Technical curiosity and adaptability across legacy and modern applications, data migration and automation.

Responsibilities

• Maintain existing applications and contribute to new solution development.
• Develop, test, document and enhance Java-based applications focusing on backend data processing.
• Write and optimize SQL queries and stored procedures in MS SQL Server.
• Perform data transformation and migration from diverse data sources.
• Collaborate with developers, business users and system integrators to support transitions and upgrades.

Skills

Java

SQL

Analytical

Collaboration

Adaptability

Tools

MS SQL Server

Job description

Java & SQL Developer - Data Focused Applications

Date: Jun 6, 2026

Location: Venlo, NL, 5928 PG

Company: Belden Inc

Innovation Starts With You

Propel your career at Belden, where innovation creates possibilities—for our people, our customers, and the communities we serve. We connect people, information, and ideas to solve the world’s most complex connectivity challenges, turning curiosity into meaningful impact. Here, you’ll take on work that challenges you, supports your growth, and empowers you to shape what’s next. You’ll collaborate with global teams, gain diverse perspectives, and contribute to solutions that extend beyond our business—creating value in the world around us.

Together, we are shaping the future of digitization and paving the way for the next generation of innovation.

• Place: Venlo, Netherlands
• Type: Full-time, hybrid
• Level: Mid-Level

You will make an impact in the following way:

• Support and maintain existing applications while contributing to the development of new solutions
• Develop, test, document, and enhance Java-based applications with a focus on backend systems and data processing
• Write and optimize SQL queries and stored procedures in MS SQL Server
• Perform data transformation and migration from diverse and unstructured data sources
• Collaborate with developers, business users, and system integrators to support system transitions, migrations, and upgrades

What you will bring:

• Java Development Experience – You have 3+ years of professional experience developing Java applications, including hands-on experience with Java Swing.
• SQL & Database Knowledge – You are experienced in working with SQL databases, preferably MS SQL Server, including query optimization and stored procedures.
• Analytical & Problem-Solving Skills – You enjoy troubleshooting technical issues and analyzing complex backend systems and data flows.
• Collaboration & Communication – You work effectively with technical teams, business stakeholders, and end users to deliver practical solutions.
• Technical Curiosity & Adaptability – You are comfortable working on both legacy and modern applications, including data migration, automation, and system transition projects.

Let’s Create Possibilities Together.

Join a global community shaping the future of intelligent connectivity. At Belden, you’ll help push the boundaries of technology and write the next chapter of innovation, creating possibilities for your career, your future, and the world around you.

These statements are intended to describe the general nature and level of work involved for this job. It is not an exhaustive list of all responsibilities, duties and skills required of this job.