Senior Software Engineer

XFA; Antwerpen; Hybrid; EUR 90,000 - 110,000; Full time

Benefits offered by this job

Salary package

Company insurance

Meal vouchers

Commuting coverage

13th month

Job summary

XFA is seeking a Senior Software Engineer to design, develop, and maintain secure, scalable software for its cybersecurity platform. You’ll collaborate with founders and product teams across backend, desktop, and mobile apps, with a hybrid work model in Antwerp, Belgium.

The role offers growth into technical leadership, exposure to AI-assisted development, and a fast-moving startup environment with international clients and a competitive salary package.

Qualifications

• Strong experience in software development with Golang, or familiarity with languages such as Python, .NET, or Java.
• Understanding of software security principles and an interest in cybersecurity.
• Excellent communication skills, both asynchronous and synchronous.
• Comfortable working independently and proactively in a fast-moving start-up.
• Experience with Flutter, React or Typescript is a plus.
• Experience developing cross-platform applications for Windows, macOS, or Linux is an advantage.
• Fluent in English; other European languages are a plus.

Responsibilities

• Design, develop, and maintain software using Golang, Flutter, and Typescript.
• Create secure and scalable back-end technology used globally
• Expand functionality on both desktop and mobile operating systems.
• Write automated tests and maintain high-quality, reliable code.
• Collaborate with a small, fast-moving team to implement new features and resolve technical challenges.
• Participate in code reviews, ensuring coding standards and security best practices are upheld.
• Continuously improve developer workflows, build processes, and documentation.

Skills

Golang

Flutter

Typescript

Python

English proficiency

Tools

React

Job description

Senior Software Engineer

Full-time Hybrid (Antwerp, Belgium)

Job Details

As a Senior Software Engineer, you’ll work closely with the founders and product team to expand the technology of XFA’s cybersecurity platform. You’ll design, develop, and maintain secure, scalable, and high-performing software that protects organizations worldwide.

This role is perfect for someone who’s passionate about technology, curious about cybersecurity, and motivated to make an impact. You’ll gain hands‑on experience across backend, desktop, and mobile applications — contributing directly to the success of our product and shaping the future of security technology.

This position is a fast‑track opportunity to grow into a technical leader.

About XFA

XFA is a growing Belgian start‑up that creates game‑changing cybersecurity technology to protect users and businesses around the world.

While legacy technologies rely on complexity to secure devices, XFA automatically finds all unknown and unsafe devices, and blocks them at login to ensure device security — without intrusive device control.

As we continue to expand, we’re looking for ambitious people to join us in shaping the future of cybersecurity.

Responsibilities

• Design, develop, and maintain software using Golang, Flutter, and Typescript.
• Create secure and scalable back-end technology used globally
• Expand functionality on both desktop and mobile operating systems.
• Write automated tests and maintain high-quality, reliable code.
• Collaborate with a small, fast-moving team to implement new features and resolve technical challenges.
• Participate in code reviews, ensuring coding standards and security best practices are upheld.
• Continuously improve developer workflows, build processes, and documentation.

Requirements

• Strong experience in software development with Golang, or familiarity with languages such as Python, .NET, or Java and willingness to learn Golang.
• Understanding of software security principles and an interest in cybersecurity.
• Excellent communication skills, both asynchronous and synchronous.
• Comfortable working independently and proactively in a fast-moving start-up.
• Experience with Flutter, React or Typescript is a plus.
• Experience working in an AI-assisted development workflow is a plus.
• Experience developing cross-platform applications for Windows, macOS, or Linux is an advantage.
• Fluent in English; other European languages (e.g., French, German, Dutch) are a plus.

What we offer

• Working in a motivated team, dreaming big.
• Transparency and open communication.
• A high-growth environment with exposure to international markets and industry-leading clients.
• Flexibility in both directions, the results of the work are what is important.
• Work on cutting‑edge technology, implementing the latest in AI and Cryptography.
• The opportunity to be part of a fast-growing start‑up where you can help shape the company’s future — supported by a collaborative, ambitious team that celebrates wins and encourages growth.
• An attractive salary package, including company insurance, meal vouchers, commute coverage, and a 13th month in accordance with Belgian employment law.

Ready to accelerate your software engineering career and make an impact in the cybersecurity world?