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For Companies At a Glance
- Tasks: Secure AI systems for top brands by embedding security into every line of code.
- Company: Join WRITER, a leading enterprise in AI-powered work with a collaborative culture.
- Benefits: Generous PTO, comprehensive health insurance, and wellness stipends.
- Why this job: Make a real impact on the future of AI security while working with innovative technology.
- Qualifications: 2+ years in application security and proficiency in multiple programming languages.
- Other info: Dynamic environment with opportunities for growth and learning.
The predicted salary is between 36000 - 60000 £ per year.
About WRITER
WRITER is where the world's leading enterprises orchestrate AI-powered work. Our vision is to expand human capacity through superintelligence. We are proving it is possible through powerful, trustworthy AI that unites IT and business teams together to unlock enterprise-wide transformation.
About the role
This is where security meets innovation at enterprise scale. As a security engineer, applications at WRITER, you will be building the security foundations that protect the AI systems powering some of the world's most recognisable brands. You will work at the intersection of application security, AI infrastructure, and developer enablement—partnering with engineering teams to embed security into every line of code while ensuring our platform remains both powerful and trustworthy.
The opportunity is massive: you will help define how enterprise AI applications are secured, from threat modelling our LLM architectures to building automated security controls that scale across our growing platform. This isn't about saying "no" – it's about finding creative ways to say "yes, and here's how we do it securely." You will tackle challenges that most security engineers never encounter: securing AI agents, protecting training data pipelines, and designing controls for systems that didn't exist a few years ago.
What you’ll do
- Build security into the DNA of our AI platform by conducting threat modelling sessions with product teams, designing secure architectures for new features, and ensuring security considerations shape product decisions from day one—not after the fact.
- Own and evolve our application security program including establishing and maintaining SAST/DAST scanning in CI/CD pipelines, conducting security code reviews for critical changes, and building automation that catches vulnerabilities before they reach production.
- Partner with engineering teams to establish and champion secure coding standards, creating reusable security patterns and libraries that make it easier for developers to build securely by default.
- Design and recommend security features and products that help secure customer environments.
- Integrate and leverage AI agents to help increase velocity for the security team and the overarching engineering organisation to ensure that we are proactive in minimising risk while we build products.
- Lead security assessments and penetration testing of WRITER's applications, AI services, and APIs, identifying vulnerabilities across our tech stack and working collaboratively with teams to remediate issues at scale.
- Design and implement security controls for protecting data pipelines, model training environments, and customer-facing AI agents.
- Stay ahead of emerging threats in the AI/ML security landscape, researching attack vectors specific to LLMs and generative AI, and proactively building defenses against novel risks.
What you need
- 2+ years of hands-on experience in application security engineering, with a proven track record of securing large-scale production systems – bonus points if you've worked in fast-growing startups or high-growth environments.
- Understanding of developer experience and developer workflows for shipping features and products.
- Technical expertise in at least two programming languages (Python, Java, Go, JavaScript/TypeScript) and the ability to read and review code across multiple languages, understanding both business logic and security implications.
- Knowledge of security tools and methodologies including SAST/DAST solutions, vulnerability management platforms, security testing frameworks, and DevSecOps practices.
- Excellent communication skills that allow you to translate complex security concepts into clear recommendations for both technical and non-technical audiences.
- A builder's mindset that looks for opportunities to automate, scale, and empower rather than create bottlenecks.
- Alignment with WRITER's values of Connect, Challenge, and Own.
Benefits & perks (UK full-time employees)
- Generous PTO, plus company holidays
- Comprehensive medical and dental insurance
- Paid parental leave for all parents (12 weeks)
- Fertility and family planning support
- Early-detection cancer testing through Galleri
- Competitive pension scheme and company contribution
- Annual work-life stipends for wellness and learning and development
- Company-wide off-sites and team off-sites
- Competitive compensation and company stock options
Security engineer, application security (UK) employer: Writer
Contact Detail:
Writer Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Security engineer, application security (UK)
✨Tip Number 1
Network like a pro! Reach out to people in the industry, especially those at WRITER. A friendly chat can open doors that applications alone can't. Use LinkedIn or even Twitter to connect and engage with potential colleagues.
✨Tip Number 2
Show off your skills! If you’ve got a portfolio or GitHub with projects related to application security, make sure to highlight them. This is your chance to demonstrate your hands-on experience and creativity in tackling security challenges.
✨Tip Number 3
Prepare for the interview by diving deep into WRITER’s mission and values. Understand how your role as a security engineer fits into their vision of AI-powered work. Tailor your answers to show how you can contribute to their goals.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen. Plus, it shows you’re genuinely interested in being part of the WRITER team. Let’s get you on board!
We think you need these skills to ace Security engineer, application security (UK)
Some tips for your application 🫡
Tailor Your Application: Make sure to customise your CV and cover letter for the role. Highlight your experience in application security and how it aligns with WRITER's mission of securing AI systems. We want to see how you can contribute to our innovative environment!
Showcase Your Skills: Don’t just list your skills—demonstrate them! Include specific examples of projects where you've implemented security measures or improved processes. This helps us understand your hands-on experience and how you tackle challenges.
Be Clear and Concise: When writing your application, keep it straightforward. Use clear language and avoid jargon unless necessary. We appreciate a well-structured application that gets straight to the point while showcasing your personality!
Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you’re considered for the role. Plus, it shows you’re proactive and keen to join our team!
How to prepare for a job interview at Writer
✨Know Your Stuff
Make sure you brush up on application security principles and the latest trends in AI security. Familiarise yourself with threat modelling, SAST/DAST tools, and secure coding practices. Being able to discuss these topics confidently will show that you're not just a candidate, but a knowledgeable partner for their engineering teams.
✨Showcase Your Experience
Prepare to share specific examples from your past roles where you've successfully secured large-scale production systems. Highlight any experience in fast-growing startups or high-growth environments, as this aligns perfectly with what they’re looking for. Use the STAR method (Situation, Task, Action, Result) to structure your responses.
✨Communicate Clearly
Since you'll need to explain complex security concepts to both technical and non-technical audiences, practice simplifying your language. Think about how you can convey the importance of security without overwhelming them with jargon. This will demonstrate your excellent communication skills and your ability to connect with diverse teams.
✨Emphasise Collaboration
WRITER values teamwork, so be ready to discuss how you've partnered with engineering teams in the past. Share examples of how you’ve championed secure coding standards or collaborated on security assessments. This will show that you understand the importance of building relationships and working together to achieve common goals.