Location: Remote (UK/EU time zones) with quarterly in-person meet ups (UK)

Type: Full-time

Start: ASAP

Comp: Competitive salary + options (depending on role/scope)

Hiring for: Multiple founding-level engineering roles

About Ossprey

Ossprey is a UK-based cybersecurity company building real-time protection against malicious activity in open-source software and supply chains. We’ve recently closed our pre-seed round (announcement coming soon) and are moving from closed beta to public launch.

With a working MVP already in place, we’re scaling the engineering team to build the platform, expand detection coverage, and sculpt the product experience that makes open-source risk obvious and actionable.

Work Setup

Remote-first with UK office hours and flexible working. Quarterly in-person meetups and occasional UK travel for workshops and team events. Customers site visits may be required in the future.

Why Join Now

1. This is a true founding-engineer opportunity: you’ll shape the product, architecture, and engineering culture at the moment it matters most.
2. Real momentum, early enough to matter: we have funding, an MVP, and customers waiting to use the product. You’ll help take this to public release and beyond.
3. High-leverage problems: analysis pipelines, detection quality, explainability, and performance/cost trade-offs at scale.
4. Security with taste: we care about signal over noise and building a product customers trust (not just a scanner that generates alerts).
5. Ownership and impact: you’ll run meaningful parts of the roadmap end-to-end and see your work land with users quickly.

Roles

Full Stack Engineer

Ship customer-facing features end-to-end across backend and frontend. Work directly with customers and internal stakeholders to move from closed beta to public release.

ML Ops Engineer

Operationalise LLM-powered detection workflows: evaluation, monitoring, quality control, cost management, and safe deployment of model and prompt changes.

Note: While we’re hiring for these two roles, everyone contributes across the stack at this stage.

First 90 Days

• Help move the product from closed beta to public release
• Deliver changes that get customers using Ossprey in their build and release pipelines
• Improve reliability, observability, and operational hygiene so we can scale usage without surprises

What We’re Looking For

We will hire for ability and judgement over specific tools. If you learn quickly, take ownership, and can drive ambiguous problems to completion, you’ll thrive here.

• Strong ownership: You take large problems, define the plan, and deliver end-to-end
• Prioritisation: You identify what must be done now vs what can wait, and communicate trade-offs clearly
• Speed with judgement: You ship quickly using an iterative approach while protecting security and customer trust
• Remote-first mindset: Strong written communication, documentation habits, and proactive knowledge sharing
• Customer empathy: Comfortable engaging with customers to understand their problems and turn feedback into shipped product

Tech Stack

You don’t need experience with everything listed, but this is what you’ll be working with:

• Python: backend and ML Ops
• JavaScript and React: frontend
• AWS: product infrastructure
• Azure: AI tooling and related services
• LLM/ML experience: helpful for ML Ops role

Interview Process

Our interview process is designed to be lightweight, practical, and consistent with how we work (high-trust, high-ownership). Little to no prep required.

1. Role + startup reality check (founder call)
   A conversational interview covering what you’re looking for, what we need, how we work, and what “early-stage” really means day-to-day (pace, ambiguity, ownership, trade-offs).
2. Technical interview (experience + judgement)
   We’ll dig into your technical background, strengths, and growth areas. Expect discussion-based problem solving and trade-off thinking (architecture, reliability, security, pragmatism). No gotcha puzzles.
3. Offline product session (hands-on + written feedback)
   You’ll use Ossprey and write some technical notes on the product and how we can improve it. Afterwards we will go through your thinking and discuss your suggestions. You will use this session to showcase how you think and communicate: what you tried, what you noticed, what you’d improve, and any questions or hypotheses you’d want to test. We expect this to take 90 minutes, (45 minutes reviewing Ossprey, 30 minutes discussing it)
4. Final round-up + culture interview
   A wrap-up conversation focused on collaboration style, values, and how you like to work. This is also where we align on expectations, scope, and next steps.

How to apply

Please reach out to hiring@ossprey.com with a copy of your CV, or reach out on LinkedIn.