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For Companies At a Glance
- Tasks: Build and ship innovative software features across the stack, from UI to cloud.
- Company: Join a dynamic UK cyber security startup making waves in software supply chain security.
- Benefits: Competitive salary, equity opportunities, and a remote-first work culture.
- Why this job: Make a real impact in cyber security while working with cutting-edge technologies.
- Qualifications: Experience in React, Python, and AWS Serverless; passion for product development.
- Other info: Be part of a high-output team with excellent growth potential.
The predicted salary is between 64000 - 80000 £ per year.
Remote-first (UK) | £80,000-£100,000 + equity
We are hiring for a UK cyber security startup building a platform that helps organisations detect malicious open-source code and secure their software supply chain in real time. The product continuously scans dependencies, surfaces risk clearly, and helps teams prevent compromised packages from entering the codebase - without slowing engineering down.
If you are a strong full stack engineer who enjoys building clean, scalable products and you are curious about cyber security, this is a chance to build something genuinely important.
Why this is interesting (especially if you like cyber)
Open source and third-party dependencies are now one of the biggest attack paths for modern organisations. This team is tackling that head-on with a platform designed for both engineering and security teams - offering malware detection, deep dependency visibility, and policy enforcement to stop bad code early. They are also part of a leading UK cyber security accelerator programme, supporting the next generation of high-growth security startups.
The role
You will join a small, high-output engineering team and build customer-facing features end-to-end - front to back to cloud. You will ship frequently, own features, and have real influence over architecture and product direction. This role includes LLM exposure, but the emphasis is practical integration via APIs (plugging LLM capabilities into workflows), not building research-heavy or RAG-first systems.
What you will do
- Build and ship product features across the stack (UI, API, cloud)
- Develop back-end services in Python, delivering reliable, well-tested APIs
- Build responsive, intuitive front-ends in React
- Work within an AWS serverless environment (event-driven services, APIs, scalable data patterns)
- Integrate external services (including LLM APIs) to enhance workflows and automation
- Collaborate closely with founders and product to shape requirements and deliver fast
- Improve reliability, performance, monitoring, and developer experience as the product scales
What you will be building (product context)
The platform focuses on software supply chain security, including capabilities such as:
- Detecting malicious or tampered open-source packages
- Providing deep insight into dependency trees and hidden risk
- Preventing compromised code from reaching production environments
- Helping organisations enforce security policies early in the SDLC
Who you are
You are a capable Full Stack Developer who has:
- Strong commercial experience building web applications with React and Python
- Hands-on experience in an AWS Serverless setup (Lambda, API Gateway, DynamoDB, event-driven architectures)
- Confidence integrating external APIs, including modern LLM/AI services
- A product mindset: you care about usability, clarity, and shipping value
- Comfort working in a startup environment - ownership, pace, and ambiguity
- An interest in cyber security or secure software development (no need to be an AppSec specialist already)
Tech stack (high level)
- Frontend: React
- Backend: Python (APIs/services)
- Cloud: AWS Serverless
- AI: LLMs via API integrations (workflow enhancement + automation) experience is beneficial
Package
£80,000-£100,000 base salary (depending on experience)
Equity opportunity
Remote-first across the UK with flexibility and autonomy
High impact: your work will directly shape the platform and customer experience
Interested?
If you are excited by full stack engineering and want to build meaningful software in cyber security, get in touch with a CV / LinkedIn and a quick summary of what you have been working on recently (especially anything serverless or API integration heavy).
Full Stack Developer employer: 83zero Limited
Contact Detail:
83zero Limited Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Full Stack Developer
✨Tip Number 1
Network like a pro! Reach out to folks in the cyber security space, attend meetups, and connect with other developers. You never know who might have the inside scoop on job openings or can refer you directly.
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your projects, especially those involving React and Python. Make sure to highlight any work related to AWS serverless setups or API integrations – that’s what they’re looking for!
✨Tip Number 3
Don’t just apply blindly! Tailor your approach by researching the company and its product. When you reach out, mention specific features of their platform that excite you and how your experience aligns with their needs.
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets seen. Plus, it shows you’re genuinely interested in joining the team and building something impactful in the cyber security realm.
We think you need these skills to ace Full Stack Developer
Some tips for your application 🫡
Tailor Your CV: Make sure your CV highlights your experience with React, Python, and AWS Serverless. We want to see how your skills align with our needs, so don’t be shy about showcasing relevant projects!
Craft a Compelling Summary: In your application, include a quick summary of what you’ve been up to lately. Focus on any serverless or API integration work you've done. This helps us get a sense of your recent experience and interests.
Show Your Passion for Cyber Security: Let us know why you’re interested in cyber security! A genuine enthusiasm for the field can really make your application stand out. Share any relevant experiences or projects that sparked your interest.
Apply Through Our Website: We encourage you to apply through our website for a smoother process. It’s the best way for us to keep track of your application and ensure it gets the attention it deserves!
How to prepare for a job interview at 83zero Limited
✨Know Your Tech Stack
Make sure you’re well-versed in the technologies mentioned in the job description, especially React and Python. Brush up on AWS Serverless concepts too, as they’ll likely ask you about your experience with Lambda and API Gateway.
✨Show Your Product Mindset
Be prepared to discuss how you approach usability and clarity in your projects. Think of examples where you’ve shipped value quickly and how you’ve contributed to the overall user experience in your previous roles.
✨Demonstrate Your Cyber Security Interest
Even if you’re not an AppSec expert, show your enthusiasm for cyber security. Share any relevant experiences or projects that highlight your interest in secure software development and how you’ve tackled security challenges in the past.
✨Prepare for Scenario Questions
Expect scenario-based questions that assess your problem-solving skills in a startup environment. Think about how you would handle ambiguity and ownership in your work, and be ready to share specific examples from your experience.
