Experienced Software Engineer - Security

Join our dynamic team as a Reverse Engineer specializing in Mobile Software Security. In this role, you will leverage your expertise in reverse engineering and security analysis to identify and mitigate threats in mobile applications and operating systems. Your contributions will play a crucial role in enhancing the security posture of our clients.Key Responsibilities:Conduct intelligence analysis to identify and assess potential threats.Offer subject matter expertise to support various operational initiatives.Identify and evaluate new intelligence sources related to current and emerging technological threats.Skills and Expertise Required:Proficient in assembly language.Hands-on experience with Android applications and operating systems.A minimum of 3 years of relevant experience in reverse engineering and code-level security auditing, with a solid understanding of assembly language and the ability to unpack obfuscated code.Experience in both static and dynamic analysis of malicious binaries.Familiarity with Java programming.Strong analytical skills in security-related data analysis.Proficient with tools such as IDA Pro and OllyDbg.A robust foundation in security engineering, computer and network security, and authentication protocols.Qualifications:A Bachelor's degree in Engineering or a related field, or equivalent practical experience.

About Us SharkNinja is a global leader in product design and technology, offering a diverse range of highly rated lifestyle solutions that enhance the lives of consumers worldwide. With two trusted brands, Shark and Ninja, we are committed to delivering innovative products that disrupt markets and create significant growth. Headquartered in Needham, Massachusetts, we employ over 4,100 dedicated associates, and our products are available through key retailers and online platforms globally. About the RoleAt SharkNinja, we engineer intelligent, connected products that excite consumers and transform categories. Our engineering teams are expanding in Firmware, Cloud, and Mobile App development. We are building systems that integrate hardware, software, and digital experiences, leveraging AI to streamline design, coding, and testing processes.Join us in designing and delivering the next generation of SharkNinja products, including mobile applications that link consumers to their devices, full-stack architectures that provide seamless experiences, and cross-platform solutions that bring intelligence right to users' fingertips. You'll enhance our current SharkClean app platform while helping to shape a unified app ecosystem for all SharkNinja connected devices. Together, we are making our products smarter every day.What You'll DoCreate cross-platform solutions with React Native to expedite feature delivery for both iOS and Android.Collaborate closely with embedded systems, cloud, and hardware teams to provide comprehensive connected product experiences.Design and implement full-stack architectures that integrate mobile applications with cloud services and connected devices.Develop, execute, and automate tests to verify reliability, performance, and consumer-ready quality.Optimize mobile app performance for broad consumer deployment across diverse device environments.Engage with cross-functional development teams across the software stack from embedded systems to cloud services.

At Ripple Labs Inc., we envision a future where value can be transferred as effortlessly as information. Our mission is bold and transformative, and we are already making significant strides. With our innovative cryptocurrency solutions tailored for financial institutions, businesses, governments, and developers, we are enhancing the global financial landscape, fostering economic equity, and creating opportunities worldwide. Join us and collaborate with a team of dedicated professionals who support each other in achieving excellence.If you're eager to make a tangible impact and advance your career, we invite you to become part of our journey to create real-world value.Your RoleAs a Senior Mobile Software Engineer, you will contribute to Palisade, Ripple’s premier wallet-as-a-service platform. This platform empowers businesses, fintech companies, and banks to develop use cases in digital asset treasury, payments, and exchanges.

* Fully remote from the UK * Innovative Ideas. Real People. At Orca Security, we believe that in the right environment and with the right team, talent knows no boundaries. Our collaborative spirit, combined with our ambition to continuously push limits, has swiftly propelled us to unicorn status, establishing us as a global frontrunner in cloud security innovation. If you're eager to join an extraordinary team that motivates one another daily, now is the perfect moment to find your place within our group. We are on the lookout for passionate and talented individuals like you to become a part of our R&D organization and contribute to our mission of reshaping the future of cloud security. Are you ready to take the plunge and swim with our pod? Position Highlights Rapid Growth: Over the last seven years, we have accomplished milestones that typically take other companies a decade or more. During this time, we’ve significantly expanded our workforce, broadened our customer base, and quickly enhanced our product capabilities. Disruptive Innovation: Our founders recognized that traditional security solutions were inadequate for the cloud, prompting them to forge a new path. We are relentless pioneers who have developed agentless technology and continue to lead as the most comprehensive and innovative cloud security company. Robust Financial Backing: With a valuation of $1.8 billion, Orca is a cybersecurity unicorn that dominates the cloud security sector. We are supported by a remarkable group of investors, including Capital G, ICONIQ, GGV, and SVCI—a collective of CISOs who invest their own funds following thorough due diligence. Respectful and Transparent Culture: Our executives take pride in their accessibility and believe in sharing knowledge with all employees. Every team member plays a crucial role in shaping the future of our industry. About the Role As a Senior Software Engineer on the DSEC (Data & AI Security) team at Orca Security, you will be part of a vital group dedicated to safeguarding customer data and AI assets at scale. The team is responsible for scanning and analyzing a wide array of data stores and AI services—from managed databases and container images to object storage buckets and virtual machines (VMs)—to uncover sensitive data, keys, personally identifiable information (PII), and misconfigurations. You will also have the opportunity to map, model, and assess cloud AI services, providing customers with clear visibility and security insights across their data and AI landscape. This role is ideal for those who are excited about building the infrastructure that supports our Data Security Posture Management (DSPM) and AI security capabilities. You will be instrumental in helping shape the future of cloud security.

As a Senior Software Engineer specializing in Proactive Security at Deliveroo, you will play a crucial role in safeguarding our platform against emerging threats. You will collaborate with cross-functional teams to design and implement robust security solutions that protect customer data and ensure the integrity of our systems.Your expertise in software development and security practices will be instrumental in identifying vulnerabilities and enhancing our security posture. This role will challenge you to think critically and innovate solutions in a fast-paced environment.

Role overview hiya seeks a Full-Stack Software Engineer based in London to focus on mobile applications. This position involves designing, building, and maintaining mobile solutions that support both user experience and business objectives. What you will do Design and develop mobile application features, taking ideas from initial concept through to deployment Maintain and enhance existing mobile solutions Collaborate with colleagues across different teams to deliver reliable, high-quality software Work on projects aimed at improving the user experience

About xAIAt xAI, our mission is to develop artificial intelligence systems that genuinely comprehend the universe, empowering humanity's quest for knowledge. Our compact team is driven, highly motivated, and committed to engineering excellence. We seek individuals who relish challenges and are fueled by curiosity. Operating with a flat organizational structure, we encourage every employee to engage hands-on and contribute significantly to our mission. Leadership opportunities are awarded to those who demonstrate initiative and consistently deliver outstanding results. Strong work ethics and effective prioritization skills are essential for success in our environment. Excellent communication skills are also vital, as all team members must share knowledge clearly and concisely with their peers.About the RoleWe are on the lookout for an outstanding iOS engineer to join our small yet impactful team, focused on developing one of the most valuable AI applications in the world based on its user impact. You’ll be instrumental in crafting innovative mobile experiences that merge technical finesse with product excellence. The ideal candidate will possess the following qualifications:

Role overview airapps seeks a Mobile Software Architect to help define the technical direction for its mobile products. This position centers on setting architecture standards, ensuring scalability, and improving usability across the company’s mobile applications. Key responsibilities Design and develop mobile applications for airapps products Make architectural decisions that support scalable and reliable solutions Advise and guide the development team on mobile architecture best practices Contribute to product quality and enhance the user experience Location This role is based in the London Metropolitan Area.

About the Position Jane Street is on the lookout for a skilled Mobility/MDM Engineer with a robust background in mobile device management (MDM) and remote device solutions. In this pivotal role, you will be responsible for engineering, managing, and maintaining a rapidly expanding fleet of thousands of iOS and Android devices, ensuring they remain seamlessly connected to essential applications and services that are integral to our business operations. Your focus will be on enhancing, automating, and standardizing our fleet of corporate-owned and BYOD-managed devices, along with their supporting infrastructures. This involves crafting and maintaining PowerShell scripts, optimizing MDM systems, and collaborating with global teams to troubleshoot issues, deploy updates, and enhance systems in this dynamic and fast-paced field. Additionally, you will devise innovative solutions for business challenges and architect integrations that satisfy a range of stakeholder requirements. Strong communication and interpersonal skills are essential, as you will engage with colleagues across the firm worldwide to identify and resolve issues, plan and execute deployments, and improve existing systems whenever possible. Attention to detail and accurate record-keeping are critical in this role. You must possess excellent troubleshooting skills and be expected to document problem resolution processes resulting from thorough root cause analysis. This position is part of our IT Engineering group, which is a dedicated team that architects and manages a global physical, virtual, and mobile computing environment. Your analytical expertise will directly support our colleagues and ensure the highest standards of system performance.

Join Vanta as a Senior Fullstack Software Engineer specializing in Privacy & Data Security. In this role, you'll leverage your extensive experience in software development to enhance our platform's privacy features while ensuring data integrity and security. You will collaborate closely with cross-functional teams to design, develop, and implement robust solutions that protect user data.

Join Palantir, a pioneering force in data-driven software solutions, as a Senior Application Security Engineer. Our mission is to empower organizations to make critical decisions that save lives, enhance security, and drive innovation. As part of our esteemed Product Security team, you will collaborate closely with cross-functional teams to implement secure-by-design principles across our product offerings. Your expertise will be crucial in conducting comprehensive security reviews, threat modeling, and guiding the architectural design to ensure robust security measures are integrated from the ground up. You will lead strategic security initiatives that enhance our entire product suite and help identify and mitigate potential vulnerabilities through advanced analysis techniques. This is an opportunity to make a significant impact in a company dedicated to transforming the world through technology.

At Vanta, we are driven by our mission to empower businesses to earn and demonstrate trust. We firmly believe that security should be a continuous journey, not a destination. Our platform enables companies to enhance their security practices effortlessly, ensuring a seamless verification process. Join our diverse and talented team, where many have thrived without prior security experience.As a Staff Software Engineer, you will spearhead pivotal technical initiatives that deliver substantial value to our customers and organization. In this influential role within our expanding Privacy & Data Security team, based in London, you'll help strengthen our engineering footprint across Europe. Collaborating closely with product management, design, and a growing engineering team, you will drive the discovery and development of privacy features that enhance Vanta's offerings. Your contributions will expedite product development and ensure a consistent experience for all customer segments.With our rapid growth, it’s crucial to invest in the right abstractions and systems that will enable scalability. As a Staff Software Engineer, you'll identify strategic technical initiatives that resonate across our engineering team, setting a high standard for technical excellence and culture. Your past experiences will be invaluable in propelling Vanta's growth trajectory.Our company has achieved remarkable product-market fit and has been effectively monetizing since the onboarding of our first customer. The pace of our growth presents unique, career-defining opportunities for engineers looking to fast-track their development while contributing to a rapidly scaling organization.This role is remote-first, though we anticipate occasional travel to our London office for team collaboration.We invite you to be a part of our kind and talented team, where your skills can flourish, irrespective of past security experience.Your Responsibilities as a Staff Software Engineer at Vanta:Lead, scope, and execute significant technical projects, laying the foundation for scalable, performant, and adaptable systems.Design, develop, and maintain new product functionalities and infrastructure using modern technologies (TypeScript, React, Node.js).

About Checkout.com Checkout.com powers digital payments for brands such as eBay, ASOS, Klarna, Uber Eats, and Sony. The platform handles billions of transactions each year, making payments simple for businesses and consumers alike. Headquartered in London, Checkout.com operates from 19 offices across six continents. The team values performance and continuous improvement, working together to shape the future of fintech. Role Overview The Senior Mobile Engineer will help design and build mobile products that reach millions of users. This role focuses on creating user-friendly and scalable mobile experiences, collaborating with engineers and product leaders to deliver high-quality solutions. Responsibilities include defining architecture, leading technical investigations, and building the systems that support Checkout.com’s consumer products. What You Will Do Design and develop mobile experiences used by a global audience. Lead feature development from planning through deployment and ongoing support. Work closely with backend teams to align system capabilities with mobile needs. Champion best practices in testing, monitoring, and release processes to strengthen product reliability. Mentor team members, review code, and help shape the long-term technical direction for mobile at Checkout.com. Location This position is based in London.

About the Team Join SumUp's Mobile Platform Squad as a Senior Android Engineer and play a pivotal role in the development of our rapidly expanding Android ecosystem. With substantial investments in our flagship products, we empower our feature teams to create world-class experiences. You will be crucial in establishing a robust foundation that allows over 40 Android engineers to maximize their productivity and efficiency, directly influencing the future of mobile payments for millions of merchants. Our engineering culture promotes autonomy, collaboration, and innovation. Your contributions will have a significant impact, connecting mobile engineers across the organization. This role is vital for: Eliminating Bottlenecks: Strategically addressing and resolving critical bottlenecks in CI/CD pipelines and app infrastructure that may hinder the delivery of new features and enhancements. Enhancing Developer Experience: Designing and implementing state-of-the-art tools and infrastructure that markedly improve the developer experience, reduce build times, and streamline workflows for our extensive Android engineering team. Modernizing a Mature Codebase: Leading the evolution and enhancement of our Android codebase, with an emphasis on code simplicity, maintainability, and overall health across all SumUp Android products. Ensuring Product Stability & Scalability: Offering foundational support and guidance across our diverse Android product portfolio, ensuring consistency, reliability, and smooth operation for products such as Register, Android Terminal, SumUp Go, and the Merchant app. What You’ll Do: Strategic Impact: Lead initiatives to shape the core experience for both merchants and our internal Android developers, directly contributing to SumUp's ambitious Android product roadmap. Technical Leadership: Architect, develop, and maintain critical tools, frameworks, and infrastructure that significantly enhance the consistency, scalability, and reliability of our mobile applications, ensuring no adverse effects across our various Android products. Performance & Efficiency: Drive initiatives in CI/CD systems, advanced developer tooling, and performance optimizations to dramatically streamline mobile development processes and reduce build times for our expanding team. Codebase Evolution: Proactively address technical debt, enhance code health, and introduce best practices to a complex, mature codebase, ensuring its long-term viability.

Abound is changing how consumer lending works in the UK and beyond. By combining advanced AI with Open Banking data, the company looks at a person’s complete financial situation, not just a credit score, to make lending decisions that are fairer and more accurate. Since launch, Abound has issued over £1.3bn in loans, with a credit performance that outpaces industry averages. The company became profitable within 2.5 years and has backing from major investors, including Citi and Deutsche Bank. With over £2bn in funding, Abound is recognized as one of Europe’s fastest-growing fintechs. Role overview This Senior Security Engineer position is based in London and sits within the Platform team. The role blends DevSecOps responsibilities, serving as a bridge between product engineering and Corporate IT. As a hands-on contributor, the Senior Security Engineer critically reviews security architecture across both production and internal IT environments. During the first 6 to 12 months, the focus will be on designing and implementing next-generation cloud security architecture in AWS and GCP. The role also involves building and maturing internal SOC capabilities, particularly around detection and response. What you will do Manage Microsoft Sentinel to strengthen SIEM/SOAR capabilities Automate RBAC for identity and access management across AWS, Microsoft Entra, and internal systems Embed security controls into GitLab CI/CD pipelines, including scanning, infrastructure-as-code reviews, and automated policy enforcement Support a shift-left approach by integrating security throughout the software development lifecycle Technology stack Cloud & Compute: AWS, ECS Fargate, Aurora, Lambda, GCP Data Lake: S3, DMS, Glue Security & Identity: Microsoft Defender (XDR), Microsoft Sentinel (SIEM/SOAR), Defender for Cloud (CSPM), Microsoft 365, Entra, Intune Cloud Security Tooling: GuardDuty, Security Hub, Inspector, Security Command Center Code & Infrastructure: Terraform, GitLab CI/CD

airapps is hiring a Security Engineer to help safeguard digital assets and infrastructure in the London Metropolitan Area. This role centers on identifying weaknesses, managing security risks, and ensuring strong security measures are in place. Key responsibilities Identify vulnerabilities throughout information systems Reduce and address security risks as they arise Implement and maintain effective security protocols Support efforts to comply with relevant industry standards Help strengthen the company’s overall security posture Location This position is based in the London Metropolitan Area.

ABOUT AvolutionJoin Avolution, a prestigious global leader in Enterprise Architecture Software with over 20 years of experience. Our established presence spans across London, Sydney, Northern Virginia, and Singapore, and we are recognized in the Gartner Magic Quadrant as an industry frontrunner. Become part of our intelligent, friendly team, where your skills and initiative will drive our growth while enjoying a culture rated as collegial, collaborative, flexible, and supportive by our employees.Key ResponsibilitiesCloud & Infrastructure SecurityDesign, manage, and enhance security configurations across Azure and AWS environments, ensuring seamless integration with Office 365.Implement and enforce industry best practices for identity and access management (IAM) in Azure AD (Entra ID) and AWS IAM.Monitor cloud workloads for vulnerabilities, misconfigurations, and threats utilizing tools such as Microsoft Defender.Collaborate with DevOps/Engineering teams to embed security controls into CI/CD pipelines, advocating for DevSecOps principles.Conduct thorough security assessments, including aiding in penetration testing and risk evaluations to identify and mitigate potential vulnerabilities.Endpoint & Identity SecurityEnhance device posture, compliance, and management utilizing Microsoft Intune and Defender for Endpoint.Develop and maintain solid conditional access, multi-factor authentication (MFA), and endpoint protection policies.Oversee secure identity lifecycle processes, enforcing least-privilege access and zero-trust principles.Security OperationsRespond promptly to security alerts, incidents, and vulnerabilities with thorough investigations and remediation actions.Perform regular risk assessments, security reviews, and internal audits.Manage and optimize security tools, including SIEM, EDR, vulnerability scanners, and the Microsoft Defender suite.Lead incident response efforts and coordinate with cross-functional teams.Compliance & GovernanceSupport ISO 27001:2022 recertification and ongoing compliance activities, including internal audits.Prepare for and assist in obtaining additional compliance certifications (e.g., SOC 2, GDPR) to facilitate company growth.Develop, maintain, and enhance security policies, procedures, and technical documentation.Track, report on, and address audit findings or compliance gaps.Collaboration & CulturePartner with globally distributed teams across EMEA, AMER, and APAC regions.Educate internal teams on security best practices and cultivate a security-first culture through training and awareness initiatives.

Role Overview Aircall is looking for a Security Engineer focused on Product Security to help protect our products and platform. This role is based in our London office. What You Will Do Work with teams across engineering, product, and other functions to spot vulnerabilities and address them early in the development process. Implement security measures that fit our product development lifecycle. Lead security initiatives that strengthen customer trust and protect sensitive data. Support efforts to keep our security standards high as our platform evolves. Impact This role directly shapes the security of Aircall’s products and the safety of customer data. The work supports our commitment to strong security practices and helps maintain trust with our users.

Join Us in Shaping the Future of Cyber Security.At Quantexa, we believe in the power of innovation and continuous improvement. Our mission is to forge meaningful relationships with our clients and drive impactful change across various industries. With a diverse workforce comprising over 50 nationalities and 20 languages spoken, we foster an inclusive environment where every voice matters. Here, you will find the autonomy and support needed to craft a career that aligns with your aspirations.The Role.We are seeking a proactive and technically skilled Cyber Security Engineer to join our Security Operations team. In this hands-on role, you will be instrumental in safeguarding Quantexa's digital assets. Your responsibilities will include the operational management, optimization, and monitoring of essential security platforms, focusing on Zscaler, cloud monitoring via Wiz, and endpoint detection and response through CrowdStrike.Collaborating closely with the broader Security Operations team, you will ensure that security alerts, findings, and detections are efficiently triaged, validated, documented, and remediated. Your contributions will directly enhance Quantexa's security posture by minimizing risk, bolstering detection capabilities, and ensuring timely responses to security incidents.This position is ideal for a curious and detail-oriented professional who thrives on working with cutting-edge security tools, embraces disciplined execution, and seeks opportunities for ongoing improvement.Your Responsibilities.Wiz (Cloud Security Posture Management)Daily monitoring and triaging of Wiz findings, validating alerts and assessing operational impact.Engaging in tuning and threat hunting within Wiz and other security tools.Identifying misconfigurations, excessive permissions, and exposed assets while escalating issues as necessary.Tracking remediation progress with engineering teams and ensuring the resolution of high-priority issues.Zscaler (Web Security Tunnel 2.0)Reviewing and triaging Zscaler alerts and policy violations according to documented response procedures.Investigating suspicious traffic, access attempts, and user activity to determine legitimacy.