Safe AI Software Engineer

Role Summary

This is a unique opportunity to work at the cutting edge where high-performance AI and confidentiality intersect. You won't just be building another backend; you will be designing the future of secure intelligence. In this role, you will help solve the industry's most pressing challenge: how to run powerful AI models while maintaining absolute cryptographic certainty and data isolation. Joining our team means pushing the boundaries of what is possible and ensuring the next generation of enterprise AI is secure by design.

We are looking for an innovative Software Engineer to join our Safe AI team. Instead of just following a manual, you'll take responsibility for the integration and microservices architecture that make our highly secure inference platform a reality. Your mission is to implement sophisticated attestation mechanisms, protecting critical model weights and execution limits. This is your opportunity to turn complex security protocols into a fluid, high-performance reality.

Motivates you

Dynamism: You inspire others to work as hard as you. You always find the way, no matter the difficulty of the task.

Responsibility: You have an owner/builder mentality. You care about what you deliver and you accept your mistakes.

Proactivity: You don't wait for someone to tell you what to do or what problems to solve. You are always looking for ways to learn and improve.

Excellence: You set a high bar and exceed expectations. You reach your goals and ask for more.

Humility: You do not consider yourself above any task in the organization and you are willing to stop what you are doing to help a colleague.

Responsibilities

• Schedule and stabilize microservices, connecting backend data flows with advanced containerized inference runtimes to ensure continuous data flow.
• Secure Endpoint Development: Design, expose, and optimize stable APIs for protected ingestion of models, system lifecycle events, and inference requests.
• Integrate security sidecars and automated provisioning modules that run asymmetric decryption protocols (e.g. 4096-bit RSA) and cryptographic signature validation to facilitate asset release via attestation.
• Networking and Gateway Routing: Configure low-latency sidecar proxies and API gateways to maintain end-to-end encrypted routes using strict mutual authentication (mTLS).
• Maintain and update cloud-native application configurations (such as Helm charts) to orchestrate isolated container environments across distributed execution clusters.

Requirements

• Core Systems Programming: Professional fluency in Python, Rust, or C/C++ applied to performant backend services, API frameworks, or system microservices.
• DevOps & Automation Agility: Familiarity constructing continuous integration and continuous deployment (CI/CD) automated pipelines, container orchestration scripts, and automated validation frameworks to facilitate continuous software updates.

Desirable

• Fundamentals of Applied Cryptography: Knowledge of digital certificate management, public key infrastructure (PKI), asymmetric encryption tools (GPG) and transport security protocols (TLS 1.3/mTLS).
• Hardware Security Foundations: Conceptual or practical familiarity with Trusted Execution Environments (TEEs), confidential computing isolation or remote attestation concepts.
• Cloud Native AI Frameworks: Hands-on experience working with high-performance inference engines and service frameworks (such as vLLM or KServe) in container environments.
• The expected base salary for the position is between €35,000 and €45,000; Actual salary will be proportional to the candidate's experience, skills and location.
• Still not sure?
• At Capacity we value more than just technical skills. Our goal is to build a comprehensive and diverse team. If you're not sure if you qualify, just apply! We will carefully consider your request and will always be grateful for the time and effort invested in Capacity.
• But wait, there's more!

At Capacity we believe in more than just building amazing products and helping our customers. Although we are a remote workforce, we remember where we started. We continue to strive to elevate our community by promoting access to education and careers in the technology space. Our affiliated nonprofit, Create A Loop, brings rigorous computer science courses to underserved communities with little to no access to formal education in this area. There are many opportunities for our team members at Capacity to serve and educate our Create A Loop students throughout the year.

Benefits

• Company-paid health insurance (for you and your eligible dependents)
• Units of interest on profits / incentive compensation
• Flexible compensation options (i.e. food voucher, transportation voucher, and daycare voucher)
• Competitive time off and holiday policies
• An inclusive and diverse workplace where we prioritize respect for each other and our clients
• A fun and collaborative team culture

About the Company

Our mission at Capacity is to help teams do their best work through our AI-powered support automation platform. Capacity offers everything you need to automate support and business processes in a powerful omnichannel platform.

We believe that every individual voice, perspective, and background brings inherent value to improving our product, serving our customers, and generating more ideas to solve complex problems. By continuing to hire talented, motivated teammates, we have the opportunity to see Capacity become a premier enterprise SaaS platform brand.

Capacity has raised over $100 million from over 150 investors, giving us the opportunity to make ambitious investments in our team and big bets on our future. Any company that wants to increase revenue, reduce costs and improve customer and employee satisfaction is an opportunity for Capacity to shine.

What your position will entail

Capacity team members enjoy the opportunity and benefits of working at an AI startup, but with leaders who have worked at places like Apple, Ebay, Visa, Answers.com, Oracle, Boeing, and many other world-class companies. The culture at Capacity fosters innovation, independent problem solving, and collaboration as we continue to mature our product in the ever-changing world of AI.