Senior Software Developer (C/Python)

Entrust; Cambridge; Hybrid; GBP 70,000 - 100,000; Full time

Job summary

Entrust in Cambridge is seeking a Senior Software Developer to help design and implement Linux-based system tools for our hardware security modules. The role combines Python scripting with C development in an embedded context, focusing on security, containers, and scalable tooling.

You will contribute across design, implementation, testing and code review, working on multi-component projects that interact with HSMs, kernel interfaces, and platform services in a hybrid work setup.

Qualifications

• Degree or equivalent in a software-related field.
• Strong Python scripting in embedded context; C programming helpful.
• Familiar with Linux security rules, network stacks, and kernel.
• Experience with multi-component projects and multiple languages.

Responsibilities

• Design and develop the full system with embedded HSMs, client-side tools and API libraries.
• Develop features from inception to delivery.
• Software design, coding, testing and review.

Skills

Python scripting

C programming

Linux security rules

Container privileges security

Embedded context

Linux networking

Education

Software/CS degree

Tools

Linux Kernel

Job description

Job title: Senior Software Developer (C/Python Systems)

Location: Cambridge (Hybrid, 3 days onsite)

Job type: Permanent, full-time

About the Position:

You will join a team working on Linux system tools requiring Python development experience for scripting along with C coding experience.

We’re using locked-down SELinux embedded in our Hardware Security Modules (HSMs), tackling the network stacks, security rules, container interplay, & other challenges. We’re also working on the tools to interact with and control HSMs, and their secure (signed) upgrade process.

The SELinux applications involve many large interacting processes and containers. As to scale, the HSM hardware provides a multi-core fast processor, 8GB RAM, and multiple SSD partitions.

Responsibilities:

• Play a significant role in the design and development of our full system with embedded HSMs, client-side tools & API libraries.
• Develop features from inception to delivery.
• Software design & coding, testing, and review.

Required Qualifications:

• Degree or equivalent, in Software Engineering, Computer Science, Maths or relevant discipline.
• Scripting in Python, in an embedded context (DevOps or C programming experience will be useful). Managing process and container privileges and security.
• Understanding of Linux Security rules and Network Stacks. Familiar with Linux Kernel.
• Familiar with complex, multi-component projects, using multiple development languages.
• Ability to solve complex technical problems with demanding requirements, in innovative, practical ways.

Bonus Qualifications:

• Knowledge of Windows development.
• Knowledge of secure-boot technologies and digital signatures.
• Familiarity with full-stack from device drivers, to client-side tools & API libraries. (Some knowledge of hardware protocols.)
• Open-source software development - as licensee, or as contributor.
• A broad interest in cryptography and/or computer security techniques.
• Agile and/or Scaled Agile Framework (SAFe).