Senior Full Stack Developer (f/m/d) – PKI Services

Siemens; Amadora; On-site; EUR 60,000 - 90,000; Full time

Benefits offered by this job

Hybrid work model

Home office budget

Comprehensive health insurance

Learning platforms & mentoring

Sustainability & volunteering programs

Shuttle service

Job summary

Siemens Mobility is seeking a Senior Full Stack Developer for PKI Services. You will design, develop, and operate secure, scalable applications across modern Angular frontends and Java-based backends, integrating PKI processes and crypto-driven platforms.

You will influence architecture, automation, and cloud-native solutions in a DevSecOps environment. Join a global team shaping digital trust, with emphasis on Crypto Agility, Zero Trust, and Post-Quantum Cryptography, while delivering

Responsibilities

• Design, develop, test, and maintain enterprise-grade applications supporting PKI Services.
• Build secure web frontends and Java-based backend services using Spring Boot.
• Implement REST-based APIs and service integrations with a security-by-design mindset.
• Drive software quality through automated testing, code reviews, and CI/CD pipelines.

Job description

Senior Full Stack Developer (f/m/d) – PKI Services

Create a better #TomorrowWithUs

At Siemens, we build technology solutions to shape the world we live in. We transform industries and societies by combining the real and digital worlds. With over 300.000 of the world’s most forward-thinking minds and the power of a presence in more than 190 countries, we make a truly global impact.

Digital trust is the foundation of Siemens' global business. Our Public Key Infrastructure (PKI) services enable secure authentication, encryption, digital signatures, certificate lifecycle management, and trusted communication between people, applications, devices, and machines worldwide.

As Siemens continues to accelerate digitalization and the adoption of Artificial Intelligence (AI), trusted digital identities and cryptographic services become more critical than ever. Our PKI platforms provide the security foundation that enables secure business processes, machine identities, cloud services, and AI-driven solutions across Siemens.

We are looking for an experienced Senior Full Stack Developer with a passion for cybersecurity, cryptography, and software engineering excellence. If you enjoy building secure, scalable, and business-critical applications in a highly automated DevSecOps environment, this role is for you.

Are you ready to be part of the change? Come join us!

Your mission will be…

As a Senior Full Stack Developer within PKI Services, you will play a key role in designing, developing, and operating the PKI services used throughout Siemens globally.

You will work across the entire technology stack, from modern Angular frontends to secure Java-based backend services, while contributing to architectural decisions, technical innovation, automation initiatives, and cloud-native platform development.

Beyond software development, you will help shape the future of digital trust by supporting initiatives around AI security, Crypto Agility, and Post-Quantum Cryptography.

Full Stack Application Development

• Design, develop, test, and maintain enterprise-grade applications supporting PKI Services.
• Build intuitive and responsive web applications using modern frontend technologies and Siemens design standards.
• Develop scalable and secure backend services using Java and Spring Boot.
• Design and implement REST-based APIs and service integrations.
• Ensure software quality through automated testing, code reviews, and continuous improvement.
• Drive the complete software lifecycle from requirements engineering to deployment and operations.

Technical Leadership

• Act as a senior technical contributor and trusted advisor within the service team.
• Drive architecture discussions and contribute to strategic technical decisions.
• Promote software engineering best practices, coding standards, and security-by-design principles.
• Review solutions with a focus on scalability, maintainability, security, and operational excellence.

PKI & Security Engineering

• Develop solutions supporting certificate lifecycle management, digital identities, Virtual Smart Cards, and enterprise PKI processes.
• Implement secure authentication and authorization concepts based on OAuth2 and OpenID Connect.
• Collaborate closely with PKI experts, architects, and service owners.
• Support compliance with internal security policies and external regulatory requirements.
• Contribute to the continuous improvement of cryptographic services and trust infrastructures.
• Automate build, test, deployment, and operational workflows.
• Design and maintain secure CI/CD pipelines.
• Build and maintain hardened container images and cloud-native workloads.
• Support GitOps-driven deployments and operational processes.
• Contribute to platform reliability, observability, automation, and high availability.
• Enable secure adoption of AI-based business solutions through trusted identity and cryptographic services.
• Evaluate emerging technologies and modern development approaches.
• Support strategic initiatives around Crypto Agility, Zero Trust, and Post-Quantum Cryptography.
• Drive innovation and modernization of Siemens' global PKI ecosystem.

What We Offer

• Belong & Innovate: Work in diverse teams where every idea matters and innovation grows through collaboration and trust.
• Flexibility that Works: Hybrid model, flexible hours, and a home office budget — because balance fuels performance.
• Health & Well-being: Comprehensive health insurance, mental health support, and active sports communities to keep you feeling your best.
• Grow Without Limits: Access world-class learning platforms, mentoring, and continuous development opportunities.
• Purpose & Perks: Contribute to sustainability and volunteer initiatives, enjoy partner discounts, and take advantage of our convenient shuttle service.

#Siemens

Siemens is deeply committed to fostering a diverse and inclusive environment. We are proud to be an equal opportunity employer and strongly encourage applications from a wide array of talented individuals!