Senior Security Engineer, Application Security

BLOCKCHAIN
Greater London
3 months ago
Create job alert

Blockchain.com is the world's leading software platform for digital assets. Offering the largest production blockchain platform in the world, we share the passion to code, create, and ultimately build an open, accessible and fair financial future, one piece of software at a time.

We are looking for aSenior Application Security Engineerto join our Security team as we tackle some of the most interesting problems in the crypto space, like how do we securely scale a distributed financial platform that touches millions of people a day.

At Blockchain.com, Security is a mindset and a set of engineering approaches to better protect stakeholders, users and systems by building our creative engineering solutions to hard, sometimes previously unseen problems. The Security team is responsible for the big picture of how systems are designed for Security, and we use a breadth of tools and approaches to solve a broad spectrum of problems. Practices aimed at achieving proactive identification of potential threat actors combined with in-depth investigation of security issues into iterative improvement are key to both product security and interesting and dynamic day-to-day work.

Security at Blockchain.com is a work in progress - we are looking for an experienced, Senior Application Security Engineer to expand our Security platform and provide leadership across the Security and the broader engineering team. Are you ready for a challenge?

WHAT YOU WILL DO:

Work closely with Engineering teams to define security requirements and perform design assessments at early stages. Perform code reviews across the lifecycle of products, and penetration tests on internal and Internet-facing services.  Develop, communicate, and promote best practices for the secure development and deployment of services. Implement improvements in the strategy, processes and tooling, enhance the overall Secure Software Development Lifecycle process and lead the adoption of the “Security by design” principle. Build software and implement tooling to validate and enforce secure baselines for software development, deployment and release. Review development processes for security functionality and consistency and develop Security playbooks. Design and implement libraries and tooling for security sensitive operations (data encryption, authentication, access, logging, input validation, etc.) Support Engineering teams with implementing security fixes, and develop strategies to proactively secure their code. 

WHAT YOU WILL NEED

Extensive knowledge of secure standards and practices to build software preferably in at least one JVM based language such as Java and Kotlin. Experience working on different kinds of assignments including code reviews, secure standard development, and building secure software. Proven experience implementing Security in highly regulated environments. Previous experience in cryptocurrency projects is a plus. Experience with OWASP, Static and Dynamic Application Security Testing (AST) and dependendency validation (SCA) tools. Experience with integration into CI/CD pipelines is a plus. Knowledge of Security monitoring techniques and tools to provide actionable events to trigger automated detection and containment and ensure traceability across the entire stack. An innate curiosity, strong inclination towards best practices and thrivingness on learning new technologies. A pragmatic approach to developing clean solutions to complex problems. The foremost quality for this position or any position at Blockchain.com is integrity.

COMPENSATION & PERKS:

Amazing and accessible office location in the heart of London. Unlimited vacation policy. Apple equipment. Full-time salary based on experience and meaningful equity in an industry-leading company. London Benefits: Private Medical Insurance (BUPA), Dental, Pension, Life, Short Term & Long Term Disability The opportunity to be a key player and build your career at a rapidly expanding, global technology company in an emerging field Flexible work culture

APPLICATION:

LinkedIn profile. Link to github, stackoverflow, personal website and/or blog (if applicable).

Blockchain is committed to diversity and inclusion in the workplace and is proud to be an equal opportunity employer. We prohibit discrimination and harassment of any kind based on race, religion, color, national origin, gender, gender expression, sex, sexual orientation, age, marital status, veteran status, disability status or any other characteristic protected by law. This policy applies to all employment practices within our organization, including hiring, recruiting, promotion, termination, layoff, recall, leave of absence, and apprenticeship. Blockchain makes hiring decisions based solely on qualifications, merit, and business needs at the time.

Related Jobs

View all jobs

Security Engineer (Mid and Senior)

Senior Application Security Engineer

Senior Application Security Engineer

Senior Application Security Engineer

Senior Application Security Engineer

Senior IT Security Engineer

Get the latest insights and jobs direct. Sign up for our newsletter.

By subscribing you agree to our privacy policy and terms of service.

Industry Insights

Discover insightful articles, industry insights, expert tips, and curated resources.

Top 10 Mistakes Candidates Make When Applying for Cyber Security Jobs—And How to Avoid Them

Avoid the most common pitfalls when applying for cyber security jobs in the UK. Discover the top 10 mistakes candidates make—plus practical fixes, insider tips and curated resources that will help you secure your next infosec role. Introduction Whether it’s a Security-Operations Centre (SOC) in Canary Wharf or a fast-growing threat-intelligence start-up in Manchester, demand for cyber security talent continues to surge. Yet hiring managers on CyberSecurityJobs.tech still reject the majority of applications long before interview—usually for mistakes that can be fixed in minutes. We analysed recent vacancies, spoke with in-house recruiters and combed through the most-read guides on our site. Below is a definitive list of the ten most expensive mistakes we see, each paired with an actionable tip and a trusted resource for deeper reading. Bookmark this page before you press Apply.

Top 10 Best UK Universities for Cyber Security Degrees (2025 Guide)

Discover ten of the strongest UK universities for Cyber Security degrees in 2025. Compare entry requirements, course content, research strength and industry links to choose the right programme for you. Cyber Security has moved from IT back-room concern to critical national infrastructure. With growing threats from ransomware, state-sponsored attacks and supply-chain compromise, demand for well-trained cyber professionals has never been higher. The UK is home to a clutch of universities recognised globally for excellence in this field. Below, we profile ten institutions offering robust undergraduate or postgraduate cyber-security pathways. While league tables shift year on year, these universities have a consistent record of first-class teaching, research and industry collaboration.

How to Write a Winning Cover Letter for Cyber Security Jobs: Proven 4-Paragraph Structure

Learn how to craft the perfect cover letter for cyber security jobs with this proven 4-paragraph structure. Ideal for entry-level candidates, career switchers, and professionals looking to advance in the cyber security sector. When applying for a cyber security job, your cover letter is an essential component of your application. The cyber security industry is continuously evolving, and organisations are always seeking professionals who can protect their networks, systems, and data. Your cover letter provides an opportunity to demonstrate your technical expertise, your enthusiasm for cyber security, and your ability to contribute to the protection of sensitive information. Whether you're just entering the field, transitioning from another career, or looking to advance in cyber security, this article will guide you through a proven four-paragraph structure to create a compelling cover letter. We’ll provide sample lines and tips to help you stand out in the competitive cyber security job market.