Senior Security Engineer

Atarus; England; On-site; GBP 70,000 - 90,000; Full time

Benefits offered by this job

Budget for certifications

Opportunities for continuous learning

Clear progression to Staff / Principal Security Engineer

Job summary

A leading FinTech company in the United Kingdom is seeking a Senior Security Engineer to embed security into their software development lifecycle. Candidates should have over 5 years of experience in security roles, strong software engineering skills, and familiarity with securing web and API architectures. The role offers a chance to have a huge impact in a modern engineering-led culture, and opportunities for progression and continuous learning.

Qualifications

• 5+ years in Security Engineering / Product / AppSec roles.
• Strong software engineering skills (Python, Go or TypeScript).
• Experience securing web, mobile and API architectures at scale.

Responsibilities

• Embed security into the SDLC from architecture through production.
• Automate guardrails and integrate security tooling into CI/CD.
• Drive threat modelling and security design reviews for new features.

Skills

Security Engineering

Python

Go

TypeScript

SAST

DAST

IAST

SCA workflows

OWASP Top 10

OAuth2

Job description

Senior Security Engineer — FinTech Scale-Up

🔐 Senior Security Engineer — FinTech Scale-Up
🚀 The Opportunity
Join a high‑growth FinTech that’s transforming how millions move and manage their money — where security isn’t an afterthought, it is the product. They’re searching for a hands‑on Security Software Engineer who can engineer and automate security into the core of their platform. In this role you won’t just surface vulnerabilities — you’ll eliminate them at the root. You’ll build patterns, tooling, and automation to empower developers to ship secure software at speed.

What You’ll Lead & Deliver

• Embed security into the SDLC from architecture through production
• Automate guardrails and integrate security tooling into CI/CD
• Drive threat modelling and security design reviews for new features
• Create internal security tools, libraries, and developer workflows
• Mentor engineers and uplift security engineering craft
• Partner with product & platform teams to build secure‑by‑default systems

Qualifications

• 5+ years in Security Engineering / Product / AppSec roles
• Strong software engineering skills (Python, Go or TypeScript)
• Experience securing web, mobile and API architectures at scale
• Deep knowledge of SAST, DAST, IAST, SCA workflows & automation
• Familiarity with OWASP Top 10, ASVS, MASVS & modern secure design
• Understanding of OAuth2, OIDC, WebAuthn and identity auth patterns
• Security engineering experience in FinTech, payments or regulated domains
• Delivered secure coding training or scaled security champion programs
• Knowledge of PCI‑DSS, PSD2, SCA or financial compliance frameworks

What’s In It For You

• Huge impact: secure products used globally
• Ownership in a modern, engineering‑led culture
• Budget for certifications, conferences & continuous learning
• Clear progression to Staff / Principal Security Engineer

If you’re passionate about building secure systems at scale, engineering elegant solutions, and championing DevSecOps — you’ll thrive here. Ready to shape the future of secure financial technology? Let’s talk.