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Application Architect

Uni SystemsRemote — Luxembourg
Remote Full-time

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Experience Level

Senior

Qualifications

What qualifications are essential for this role?Bachelor's degree with 16+ years of experience or Master's degree with 12+ years in relevant fields, including at least 6 years in architecture roles. In-depth proficiency in Java (17+) and Spring Boot, with hands-on experience in both monolithic and modular architectures. A minimum of 4 years of direct experience with Spring Boot and Java-based backend systems. Thorough understanding of API design (REST/OpenAPI), relational databases (MySQL), and performance and scalability enhancement. Proven track record of managing large-scale, high-concurrency, public-facing applications and ongoing maintenance of complex systems. Solid grasp of cloud-native architectures, Kubernetes/containerization, and event-driven architectures. Familiarity with secure application design, authentication/authorization (OIDC/SAML), and data lifecycle management practices. Cloud/DevOps certifications are a plus. Fluency in English is required.

About the job

Uni Systems seeks an experienced Application Architect to help shape the technical direction of client applications. This fully remote position is based in Luxembourg. The architect will play a central role in maintaining reliable, secure, and adaptable systems as client needs evolve.

What you will do

  • Define and communicate the architectural vision for client applications, spanning backend, frontend, and data integration.
  • Review designs, recommend technology options, and guide modernization plans to manage technical debt.
  • Supervise ongoing maintenance and refactoring efforts to keep platforms stable and high-performing over time.
  • Advise on cloud-native, modular, and API-first architectures, ensuring smooth integration with legacy systems.
  • Serve as the main architectural authority, collaborating with stakeholders and taking part in governance, reviews, and strategic planning.
  • Champion security and privacy-by-design, ensuring compliance with OIDC/SAML protocols and GDPR/EUDPR standards.
  • Lead design and code reviews, technical validations, and migration activities.
  • Enhance architectural documentation, decision records (ADR), and Go/No-Go evaluation processes.

Role overview

This position focuses on setting architectural direction, overseeing governance, and ensuring that systems remain secure and maintainable. The Application Architect will work closely with technical and business stakeholders to support both current operations and future growth.

About Uni Systems

Uni Systems is dedicated to delivering cutting-edge digital solutions that bring innovative visions to life. Our commitment to excellence fosters an inclusive work environment where diversity and collaboration drive our success.

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