Senior Application Security Engineer
Senior Application Security Engineer

Senior Application Security Engineer

Full-Time 48000 - 72000 £ / year (est.) No home office possible
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At a Glance

  • Tasks: Embed application security into product development and CI/CD pipelines.
  • Company: Join a VC-backed Fintech organisation with a focus on innovation.
  • Benefits: Competitive contract pay, flexible work options, and opportunities for professional growth.
  • Why this job: Make a real impact by enhancing security in high-volume transactional platforms.
  • Qualifications: Strong background in application security and software engineering experience required.
  • Other info: Collaborative environment with a focus on mentoring and career advancement.

The predicted salary is between 48000 - 72000 £ per year.

Partnered with a VC backed Fintech organisation, I am looking for a Senior Application Security Engineer to embed application security into their product development lifecycle and CI/CD pipelines. This is an individual contributor role working closely with engineering, SRE and product teams to assess, improve, and scale AppSec across a high‑volume transactional platform.

Responsibilities

  • Review current application and API landscape, tooling and processes
  • Identify gaps and risks, then design pragmatic mitigation plans
  • Integrate security into CI/CD, SDLC and change management processes
  • Coach and enable software engineers to build secure products by default

Discovery & Assessment

  • Conduct a structured review of existing web applications and APIs
  • Map current AppSec controls, tooling and processes across the SDLC
  • Identify critical vulnerabilities, systemic weaknesses and quick wins
  • Triage and prioritise issues based on risk and business impact
  • Embed security controls into CI/CD pipelines (e.g. SAST, DAST, SCA, secrets scanning)
  • Partner with SRE and engineering teams on secure architectures and patterns
  • Define and implement secure coding standards and best practices
  • Drive threat modeling for key products and high‑risk changes
  • Support/oversee application pen testing activities as needed

Enablement & Ways of Working

  • Work closely with product and engineering leads to "shift left" on security
  • Coach and mentor engineers on secure design, coding and review practices
  • Create lightweight, usable security guidelines and playbooks for teams
  • Influence roadmaps so that security is considered upfront in new product development
  • Contribute to the AppSec roadmap and longer‑term security strategy
  • Recommend and help select security tools and services
  • Provide regular visibility on risk, progress and priorities to engineering leadership

Core Experience

  • Strong application security background with prior software engineering experience
  • Deep understanding of how AppSec fits into modern engineering environments, CI/CD pipelines, cloud‑native architectures, microservices and APIs
  • Secure SDLC and change management practices
  • Hands‑on experience with: Web application security, API security, Threat modeling, Secure coding and code reviews

Please submit your application if your profile matches the criteria.

Senior Application Security Engineer employer: Siena Partnership

Join a dynamic VC-backed Fintech organisation that prioritises innovation and security in its product development lifecycle. As a Senior Application Security Engineer, you'll thrive in a collaborative work culture that values your expertise, offering ample opportunities for professional growth and the chance to make a significant impact on a high-volume transactional platform. With a focus on embedding security into every aspect of development, this role not only enhances your skills but also positions you at the forefront of cutting-edge technology in a fast-paced environment.
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Contact Detail:

Siena Partnership Recruiting Team

StudySmarter Expert Advice 🤫

We think this is how you could land Senior Application Security Engineer

✨Tip Number 1

Network like a pro! Reach out to folks in the Fintech space, especially those working in application security. Attend meetups or webinars, and don’t be shy about sliding into DMs on LinkedIn. You never know who might have the inside scoop on job openings!

✨Tip Number 2

Show off your skills! Create a portfolio that highlights your experience with secure coding, threat modelling, and CI/CD integration. Use real-world examples to demonstrate how you've tackled security challenges in past projects. This will make you stand out when chatting with potential employers.

✨Tip Number 3

Prepare for those interviews! Brush up on common AppSec interview questions and be ready to discuss your approach to embedding security in the development lifecycle. Practice explaining complex concepts in simple terms, as you'll need to coach engineers on secure practices.

✨Tip Number 4

Don’t forget to apply through our website! We’ve got loads of opportunities waiting for you. Plus, applying directly shows your enthusiasm and commitment to joining our team. Let’s get you on board and making an impact in the world of application security!

We think you need these skills to ace Senior Application Security Engineer

Application Security
API Security
CI/CD Integration
Secure SDLC
Threat Modeling
Secure Coding Standards
Web Application Security
Code Reviews
Risk Assessment
Vulnerability Management
Coaching and Mentoring
Security Tool Selection
Cloud-Native Architectures
Microservices

Some tips for your application 🫡

Tailor Your CV: Make sure your CV highlights your experience in application security and software engineering. We want to see how you've embedded security into product development and CI/CD pipelines, so don’t hold back on those details!

Craft a Compelling Cover Letter: Your cover letter is your chance to shine! Use it to explain why you’re passionate about application security and how your skills align with our needs. We love seeing enthusiasm and a clear understanding of the role.

Showcase Relevant Projects: If you've worked on projects that involved secure coding practices or threat modelling, make sure to mention them. We’re keen to see real-world examples of how you’ve tackled security challenges in your previous roles.

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 – a quality we value!

How to prepare for a job interview at Siena Partnership

✨Know Your Stuff

Make sure you brush up on your application security knowledge. Understand the latest trends in web and API security, as well as the tools used in CI/CD pipelines. Being able to discuss specific vulnerabilities and mitigation strategies will show that you're not just familiar with the theory but can apply it practically.

✨Showcase Your Experience

Prepare to share concrete examples from your past roles where you've successfully integrated security into the development lifecycle. Highlight any experience you have with threat modelling, secure coding practices, or coaching engineers. This will demonstrate your ability to contribute effectively in this role.

✨Ask Smart Questions

During the interview, don’t hesitate to ask insightful questions about their current AppSec practices and challenges. This shows your genuine interest in the role and helps you gauge how you can add value. Questions about their CI/CD processes or how they handle security incidents can be particularly revealing.

✨Be a Team Player

Since this role involves working closely with engineering and product teams, emphasise your collaborative skills. Share examples of how you've worked cross-functionally in the past to embed security into projects. This will highlight your ability to influence and mentor others in secure practices.

Senior Application Security Engineer
Siena Partnership
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