Top Tech Jobs & Startup Jobs in London

Lead mobile security architecture, penetration testing, threat modeling, security assessments, and secure solution delivery across Android and iOS platforms. Define technical strategies, identify risks, recommend mitigations, advise clients, and drive security quality and compliance. Collaborate across full-stack mobile teams, improve security practices and tooling, and support Agile delivery. The role also involves mobile security research, reverse engineering, cryptographic controls, and DevSecOps practices.

Lead mobile security architecture, penetration testing, threat modeling, security assessments, and control implementation across Android and iOS platforms. Define secure technical strategies, develop mitigation plans, advise clients, and drive security quality and compliance. The role also contributes to mobile development, DevSecOps, reverse engineering, security research, Agile practices, technical roadmaps, and continuous improvement across front-end and back-end systems.

Senior QA Engineer responsible for defining testing strategies, building scalable Playwright automation frameworks, integrating quality checks into CI/CD pipelines, and testing functional and non-functional requirements including performance, security, and accessibility. The role includes defect triage, risk analysis, exploratory testing, peer reviews, mentoring QA colleagues, and leading knowledge-sharing initiatives. It is a 12-month fixed-term hybrid position requiring two office days weekly in Glasgow, Edinburgh, or Dundee.

Principal Data & AI Consultant responsible for advising clients on enterprise data and AI strategy, architecture, and transformation. The role involves designing batch and streaming data pipelines, enabling analytics and AI/ML applications, modernizing cloud data platforms, and championing governance, security, privacy, and compliance. The consultant will shape technical roadmaps and proposals, guide executive stakeholders, build client relationships, and mentor colleagues while contributing to Waracle’s technical direction.

Build, develop, and deploy high-performance iOS applications and scalable SDKs. Design modular architectures, optimize performance and accessibility, implement concurrency, and maintain automated testing and CI/CD practices. Lead feature delivery, communicate technical trade-offs to clients, mentor junior developers, contribute to engineering communities, and collaborate across distributed teams. Core expertise is Swift and iOS, with opportunities to work with React Native and Flutter.

Senior QA professional responsible for designing scalable automation frameworks for mobile applications and APIs, integrating automated testing into CI/CD pipelines, and embedding quality, security, accessibility, performance, and test-data practices throughout delivery. The role collaborates with engineering, DevOps, and security teams, establishes testing standards, troubleshoots root causes, and mentors QA engineers. It is a hybrid position based in London, requiring two office days weekly.

Build, optimize, and deploy high-performance Android applications and components using Kotlin, Java, Jetpack Compose, and modern architecture patterns. Lead feature delivery, communicate technical decisions to clients, mentor junior developers, contribute to engineering practices, and participate in recruitment and community activities. The role also values familiarity with React Native and Flutter.

Design and build scalable backend systems and microservices using Go. Lead testing, security, code quality, and continuous delivery practices; collaborate with clients, present technical solutions, mentor colleagues, and balance delivery speed with long-term system maintainability and performance.

Lead technical strategy and architecture across engineering squads, integrating AI-assisted delivery, MLOps, automation, and modern cloud infrastructure. Mentor engineers, promote psychologically safe collaboration, guide security and compliance practices, facilitate client workshops, manage technical scope, and improve delivery through engineering metrics such as DORA. The role also evaluates emerging technologies, supports go-to-market initiatives, and represents the consultancy externally.

Lead end-to-end product design initiatives from discovery through implementation, translating complex problems into clear, inclusive digital experiences. Define interaction and visual direction, shape design strategy, lead workshops, manage and scale design systems, conduct accessibility audits, and use research, analytics, and A/B testing to improve products. Collaborate with clients, senior stakeholders, and engineering teams while mentoring designers and promoting design best practices.