Principal Engineer at Octet

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Principal Engineer

Company Description: VC-backed deep-tech cryptography startup

Job Description:
You will lead the architectural design of a high-integrity low-latency mobile SDK and proof pipeline at the intersection of sensor fusion on-device machine learning and programmable cryptography. As a founding technical leader you will translate strategic vision into global infrastructure that verifies physical presence ensuring privacy-by-design while building unbreakable systems for commercial deployment.

Location: London UK

Why this role is remarkable:

• Work on a foundational mission to make physical presence cryptographically verifiable creating a new primitive for digital security

• Collaborate directly with founders including top-tier academic experts and repeat entrepreneurs backed by world-class venture capital firms

• Drive high-impact 01 engineering in a high-agency environment moving research breakthroughs from paper to production-ready global systems

What you will do:

• Architect and build the high-integrity SDK and proof pipeline focusing on Android systems and low-level optimization

• Implement on-device ML models that convert multimodal sensor data into real-time verified location proofs

• Lead the integration of zero-knowledge proofs (ZKPs) to achieve privacy-preserving verification without compromising performance

The ideal candidate:

• 5 years of experience in spatio-temporal systems inertial sensors or high-performance on-device ML for mobile environments

• Proven track record of shipping high-reliability low-latency mobile SDKs and mastery of Android systems programming

• Strong background in signal processing or cryptography with the ability to harden cutting-edge research into resilient software

Who are Jack & Jill
Ok Ill go first. Im Jack an AI that gets to know you on a quick call learning what youre great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up supporting you with applications interview prep and moral support.
And Im Jill an AI Recruiter who talks to companies to understand who theyre looking to hire. Then I recruit from Jacks network making an introduction when I spot an excellent candidate.

Next steps
Step 1. Visit our website
Step 2. Click Talk to Jack
Step 3. Talk to Jack so he can understand your experience and ambitions
Step 4. Jack will make sure Jill (the AI agent working for the company) considers you for this role
Step 5. If Jill thinks youre a great fit and her client wants to meet you they will make the introduction
Step 6. If not Jack will find you excellent alternatives. All for free

We never post fake jobs
This isnt a trick. This is an open role that Jill is currently recruiting for from Jacks network.
Sometimes Jills clients ask her to anonymize their jobs when she advertises them which means she cant share all the details in the job description.
We appreciate this can make them look a bit suspect but there isnt much we can do about it.

Give Jack a spin! You could land this role. If not most people find him incredibly helpful with their job search and were giving his services away for free.

Required Experience:

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