Platform Engineering Security Solution Architect (m/f/d)

Halian | Managed Services, Recruitment Agency & Contract Staffing; Brussel; On-site; EUR 90,000 - 130,000; Full time

Job summary

Halian Group in Brussels, Belgium, seeks an experienced Security Solution Architect to strengthen its enterprise security architecture. You will translate complex business, risk, and security requirements into scalable architectural solutions, with emphasis on cryptography, key management, and secure technology adoption.

The role collaborates with engineering, cloud, and infrastructure teams to design principles, assess risks, and guide build, buy, or hybrid security options, while acting as a

Qualifications

• Experience designing enterprise security architectures across domains.
• Strong knowledge of cryptography, PKI, and key management.
• Familiarity with security standards and regulatory requirements.

Responsibilities

• Design and implement enterprise security architectures aligned with organizational architecture principles, security standards, and regulatory requirements.
• Translate business requirements and risk assessments into clear security architecture requirements and high-level technical designs.
• Define architectural principles, standards, and patterns for cryptography, key management, digital certificates, and related security domains.
• Collaborate with engineering, infrastructure, application, cloud, network, and business teams to ensure consistent implementation of security best practices.
• Assess existing and emerging security risks, identify architectural gaps, and evaluate build, buy, and hybrid solutions with clear technical trade-offs.
• Act as a subject matter expert, supporting proof-of-concept activities, architectural decisions, secure technology adoption, and continuous security improvement.

Skills

Enterprise architecture

Cryptography

PKI

Key management

Post-quantum security

Job description

A leading financial services organization operating critical market infrastructure is seeking an experienced Security Solution Architect to strengthen its enterprise security architecture. The role focuses on translating complex business, risk, and security requirements into scalable architectural solutions, with a particular emphasis on cryptography, key management, emerging cryptographic risks, and secure technology adoption.

Responsibilities

• Design and implement enterprise security architectures aligned with organizational architecture principles, security standards, and regulatory requirements.
• Translate business requirements and risk assessments into clear security architecture requirements and high-level technical designs.
• Define architectural principles, standards, and patterns for cryptography, key management, digital certificates, and related security domains.
• Collaborate with engineering, infrastructure, application, cloud, network, and business teams to ensure consistent implementation of security best practices.
• Assess existing and emerging security risks, identify architectural gaps, and evaluate build, buy, and hybrid solutions with clear technical trade-offs.
• Act as a subject matter expert, supporting proof-of-concept activities, architectural decisions, secure technology adoption, and continuous security improvement.

Qualifications and Skills

• Strong enterprise architecture knowledge across applications, infrastructure, networking, cloud environments, and cybersecurity.
• In-depth understanding of cryptography, public key infrastructure, key management, cryptographic agility, and emerging post-quantum security challenges.
• Strong understanding of how cryptography is implemented across protocols, certificates, software libraries, applications, hardware, and network communications.
• Ability to assess multiple technical discovery sources, identify security coverage gaps, challenge assumptions, and evaluate complex architecture options.
• Proactive and analytical mindset with the ability to independently investigate complex problems and drive initiatives from technical assessment through architecture and implementation.
• Excellent stakeholder management and communication skills; experience within financial services or critical infrastructure environments and relevant security or architecture certifications are considered an advantage.

Halian Group

With over 28 years of experience, we have come to understand that innovation is the only way to provide agile, practical solutions that transform businesses and careers.

Our resourcing and smart services help you to realize tomorrow’s potential. Discover the amazing things possible when you bring the right people and the right technologies together.

At Halian, we recognize that diversity, equity, and inclusion (DEI) are essential to building high-performing teams for our clients. We are committed to connecting organizations with top talent from all backgrounds, ensuring that every individual feels valued, respected, and empowered to contribute their unique perspectives. We encourage applications from all qualified candidates, regardless of race, gender, disability, or any other characteristic that makes them unique. By fostering diverse and inclusive workplaces, we help our clients drive innovation, enhance collaboration, and better reflect the communities they serve.

Platform Engineering Security Solution Architect in Brussels, Belgium