Offensive Security Engineer

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Offensive Security Engineer, United Kingdom Client: Tide
Location:
Job Category: Other
EU work permit required: Yes
Job Reference: 143b598bb5f3
Job Views: 31
Posted: 22.06.2025
Expiry Date: 06.08.2025
Job Description: About Tide
At Tide, we are building a finance & admin platform designed to save small businesses time and money. We provide our members with business accounts and related banking services, as well as a comprehensive set of connected administrative solutions from invoicing to accounting.
Launched in 2017, Tide is now the leading business financial platform in the UK with 575,000 SME members (10% market share) and more than 250,000 SMEs in India. Headquartered in London, Tide has over 1,800 Tideans across the UK, Bulgaria, India, Serbia, Romania, Ukraine, and Germany.
Tide is rapidly growing, expanding into new markets, and always looking for passionate and driven people. Join us in our mission to empower small businesses and help them save time and money.
About the team As an Offensive Security Engineer at Tide, you’ll join the Threat Detection and Response team—a highly motivated and talented group of Tideans who love to collaborate and are driven by helping people achieve their business ambitions. We live and breathe our values, which are to put our members first , work as one team , and be data-driven . You’ll help elevate our security processes. Our security team is responsible for securing Tide, our Tideans, and our Members.
About the role As an Offensive Security Engineer, your responsibilities will include:
Reviewing web/mobile applications, source code, operating systems, and network security architectures; identifying vulnerabilities and defining effective strategies for remediation and hardening.
Identifying gaps in controls and vulnerabilities in our Cloud infrastructure with containerized environments and GitOps deployment pipelines.
Thinking critically to identify areas of technical and non-technical risk.
Researching and developing tools, techniques, and exploits specific to Tide.
Triaging and validating external security submissions when required.
Communicating findings and remediation actions effectively with both technical and non-technical teams.
Coaching engineers in security principles and practices.
Partnering with internal security and engineering teams to uncover vulnerabilities and detection opportunities.
Identifying weaknesses in product security controls, including vulnerabilities, misconfigurations, and procedural gaps.
Planning and scoping internal/external penetration testing with Tide engineering teams.
Supporting Incident Response with your red team expertise.
What we are looking for A passion for security and secure application design, with a love for helping engineers create more secure web and mobile applications.
Ability to explain security issues clearly to product owners, engineers, VPs, and executives, with a focus on enhancing product resilience.
Experience working within the Fintech or tech sector.
Experience in a fast-scaling business environment.
Experience in attack simulation and vulnerability research.
Proficiency in writing tooling in Python, Java, Go, etc.
Experience in security assessments for:
Mobile/Web applications and APIs, Mac/Windows, and exposure to LLM testing.
What you’ll get in return 25 days holiday plus 5 additional unpaid days.
3 days paid volunteering or L&D time off annually.
£1,000 personal L&D budget annually.
Group Life Insurance, Vitality Health, and Dental Insurance.
Spacious office near Old Street with snacks bar.
Enhanced family-friendly leave.
Access to mental wellbeing platform with therapy sessions.
Work from home budget.
Team socials and events.
Sabbatical leave.
Tidean Ways of Working We support a flexible workplace model balancing remote and in-person work to foster collaboration and community. Our offices serve as hubs for innovation and team-building.
Tide is a place for everyone We celebrate diversity and inclusivity, believing that different backgrounds and perspectives drive our success. We foster a transparent and inclusive environment where everyone’s voice is valued.

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