- 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 software supply chains. We have recently closed our pre seed round, with an announcement coming soon, and we are moving from closed beta to public launch.
- With a closed beta already in place, we are scaling the engineering team to build the platform, expand detection coverage, and shape a product experience that makes open source risk obvious and actionable.
Meet the Founders
Where did we begin?
- In 2021, a major compromise in the NPM package UAParser affected tens of thousands of users, from individual developers to large organisations including financial services and Facebook.
- We were asked to look at the problem and work out how to stop it happening again. The conclusion was clear. It is too difficult for a single company to solve alone, and there were no viable commercial options.
- By 2023, these attacks were becoming more frequent. We revisited the problem and reached the same conclusion, while the risks continued to grow.
- So we decided to build the solution ourselves. In early 2025, we started Ossprey to tackle the problem properly and make open source supply chain protection practical for everyday engineering teams.
- Our team has decades of cybersecurity experience. One of our biggest frustrations with the industry is how often security products improve security at the cost of employee productivity. We take an engineering first approach.
- We believe it is possible to make engineers more productive and more secure at the same time, and that is what we are building at Ossprey.
Why are you called Ossprey?
- We chose Ossprey as we are protecting Open Source Software from being preyed upon. Hence Ossprey Security (we love a pun).
- Our CEO is also an avid bird watcher.
Why Join Now
- This is a true founding-engineer opportunity: you’ll shape the product, architecture, and engineering culture at the moment it matters most.
- 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.
- High-leverage problems: analysis pipelines, detection quality, explainability, and performance/cost trade-offs at scale.
- Security with taste: we care about signal over noise and building a product customers trust (not just a scanner that generates alerts).
- Ownership and impact: you’ll run meaningful parts of the roadmap end-to-end and see your work land with users quickly.
What We’re Looking For
We hire for ability and judgement over specific tools. If you learn quickly, take ownership, and can drive ambiguous problems through to completion, you will thrive here.
We are looking for people who are looking to take ownership and make smart decisions for the company.
The choices you make in code can shape our platform for the next five years and beyond. We need engineers who can move fast while still making decisions that keep us moving fast as the product scales in size and complexity.
- 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/React: frontend
- AWS: product infrastructure
- Azure: AI tooling and related services
- LLM/ML: experience working with and managing LLMs
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.
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
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.
- Intro Call: 15 minutes
Lets have a chat and talk about us and the company. This is your chance to interview us. - Role, Product + Startup Reality Check: 60-90 minutes
You will use this session to showcase how you think and communicate. We'll then have a conversation about 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). Afterwards, you’ll use Ossprey and write some technical notes on the product and how we can improve it. We will then go through your thinking and discuss your suggestions. - Technical Interview: 60-90 minutes
We will give you access to an example codebase with some small tasks, you'll have access to the internet and AI tools. This will be with us, it's not homework. Afterwards we will talk through the tasks understand your approach to solving them. We’ll dig into your technical background, strengths, and growth areas. - Final Round-up + Culture Interview: 45-60 minutes
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.
Our Values
Keep it simple
- What's the most important thing right now?
- What's its simplest solution?
- What's the simplest description?
Complexity kills startups. As we grow, we protect speed and quality by keeping our product, processes, and communication as simple and clear as we can, while remaining secure, reliable, and easy to adopt.
Do the right thing
- Be respectful and compassionate
- Take accountability
- Speak up
Work with compassion, fairness, and integrity even when it's inconvenient. We act like adults: direct, honest, accountable, and respectful. Security companies live or die on trust - we are honest about what we know, what we don't, and what the risks are. We build a company we can be proud of.
Solve real problems
- Solve the root cause, not symptoms
- Provide real value
- Work hard to do this
We win by focusing relentlessly on real customer problems and validating that we're solving them. We prioritize outcomes over activity, and we take outcomes seriously. We aim for consistently high performance - quality matters, even when moving fast.
Win together
- How do we set each other up to succeed?
- Are we creating lift or drag for the team?
- Have we shared context, not just tasks?
We succeed as a team or not at all. We share context early, give each other ownership, and level each other up. Great teams are built on trust, transparency, and shared accountability. We invest in each other's growth and help each other perform at our best.
Clarity
- Are we being clear about what we know, what we don't, and what we expect?
- Have we made the implicit explicit?
- Would someone new understand this immediately?
Ambiguity creates risk - in security products and in teams. We communicate with precision and transparency, internally and externally. We make expectations, decisions, priorities, and uncertainties explicit so everyone can act with confidence.
How to apply
Please reach out to hiring@ossprey.com with a copy of your CV, or reach out on LinkedIn.
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