Senior Software Engineer, Substrate

Join xAI as a Software Engineer on our Sandbox Services team, where you'll help develop and maintain a robust, secure, and scalable platform that empowers our AI models with safe access to computational environments. This role involves orchestrating complex workloads and ensuring optimal performance across our infrastructure, enabling models to execute code …

About UsPhysicsX is a pioneering deep-tech company that blends expertise in numerical physics and the high-speed world of Formula One. Our mission is to drive hardware innovation at an unprecedented pace, leveraging the power of software.We are developing an AI-enhanced simulation software platform aimed at transforming engineering and manufacturing processes across advanced industries. By facilitating high-fidelity, multi-physics simulations through AI inference throughout the entire engineering lifecycle, PhysicsX empowers engineers to achieve exceptional levels of optimization and automation in design, manufacturing, and operations. Our clientele includes top-tier innovators from Aerospace & Defense, Materials, Energy, Semiconductors, and Automotive sectors.The RoleWe are creating a platform that allows Data Scientists and Simulation Engineers to seamlessly build, train, and deploy Deep Physics Models. Our platform caters to multiple tenants within highly regulated industries, making advanced identity, access control, and operational visibility integral to our operations.We are in search of a Senior Software Engineer to join our Core Services team. This team is responsible for constructing the foundational elements that provide our customers with unparalleled capabilities. For too long, engineers have relied on outdated, siloed tools from the 90s. We aim to revolutionize this by enabling secure, permissioned collaboration at the vanguard of AI.In this role, you will design and develop enterprise-grade systems that facilitate this transformation. From fine-grained permissions to comprehensive instrumentation, you will create the essential components that every product within PhysicsX will utilize, ensuring that every user, service, and workflow is securely identified, appropriately scoped, and fully observable. You will take ownership of the infrastructure that maintains our platform's trustworthiness, transparency, and readiness for the future of engineering and manufacturing.

Join Starling Bank, the UK's pioneering digital bank, on our mission to revolutionize banking! We have created a modern banking experience, harnessing technology to empower individuals in saving, spending, and managing their finances effectively.As a fully licensed bank, we embody the innovative spirit of a tech company, striving to make banking fairer, simpler, and more accessible for everyone. With over 3,000 employees across our offices in London, Southampton, Cardiff, and Manchester, we are at the forefront of the fintech industry.Our engineers are the heartbeat of Starling, thriving in a dynamic environment focused on building and innovating with cutting-edge technology. Our flat organizational structure encourages you to take initiative and collaborate, ensuring you have the support you need to excel.Success at Starling requires a proactive mindset and a commitment to ownership—be it through developing, designing, discovering, or sharing insights with your peers. Our mission aligns with five core values: Listen, Keep It Simple, Do The Right Thing, Own It, and Aim For Greatness.Hybrid WorkingWe embrace a hybrid work model at Starling, favoring candidates within a commutable distance of our offices for optimal collaboration and interaction.Engineering EnvironmentOur engineers eagerly contribute to delivering innovative features, regardless of their primary tech stack. Explore our insights through our latest blogs and case studies featuring Women in Tech.We value engagement and commitment to our customers, as well as the quality of code produced. Those who can tackle diverse challenges and collaborate across teams are vital in our mission to reshape banking for the better.

Role Overview We are seeking a highly skilled C# Software Engineering Manager to lead a dynamic, product-focused engineering team. This role involves close collaboration with a Product Owner, business stakeholders, and third-party partners. The successful candidate will play a pivotal role in IT Development, overseeing team leadership, solution delivery, and providing technical direction, especially within finance and operations systems. We are looking for a leader who is technically proficient, passionate about mentoring engineers, and eager to actively engage with a Microsoft technology stack.Key Responsibilities Guide a team of software engineers within the Finance Automation team (Automation and Insights) product squad. Own the technical delivery across both internal development and third-party collaborations, ensuring high quality, timeliness, and alignment with business objectives. Work closely with business stakeholders across Finance, IT, and Operations to ensure cohesive project execution. Uphold high standards in software design, development, testing, and deployment, with a focus on security, resilience, and supportability. Engage in technical decision-making, architecture discussions, and implementation strategies. Promote continuous improvement in engineering practices, including DevOps methodologies, agile delivery, and release management.

Why VerifoneVerifone has been a pioneering leader in the electronic payment technology sector for over 40 years. Recognized as one of the foremost brands in electronic payment solutions, we rank among the largest providers of payment systems globally.At Verifone, we foster a diverse and dynamic work environment where results-driven employees have ample opportunities to excel. Our collaboration with top retailers, merchants, banks, and third-party partners enables us to innovate and deliver cutting-edge payment solutions worldwide. We are committed to excellence in our products and services, with an unwavering focus on customer satisfaction. Our team of dedicated professionals is at the forefront of the payments industry, driven by experience, innovation, and a bold spirit. Whether we're developing advanced secure payment platforms or exploring new markets for electronic payments, our passion for innovation propels each employee toward personal and professional success.About The RoleWe are looking for a Principal Software Engineer based in London to provide technical leadership for our global payment gateway systems. This role involves designing and evolving core platform capabilities, guiding architectural decisions across microservices, and mentoring engineers while remaining hands-on with critical systems built using Java and Spring Boot.This position is central to shaping the technical direction of systems responsible for processing high-volume, mission-critical financial transactions globally.In this role, you will go beyond mere feature delivery. You will be instrumental in driving architectural decisions, establishing engineering standards, and influencing how teams design, build, and maintain secure, scalable backend systems. Success is characterized by technical leadership, sound judgment in complex trade-offs, and ownership of systems that must operate reliably under real-world loads and regulatory requirements.Collaboration with senior engineering, platform, product, and infrastructure teams will be crucial to ensure our systems scale effectively, remain secure, and uphold the highest standards for availability and performance.

Role OverviewJoin our dynamic IT support team as a Junior Service Desk Engineer. We seek a dedicated and customer-oriented individual to deliver first-line technical assistance to end users, effectively troubleshoot both hardware and software concerns, and ensure the seamless operation of our IT infrastructure. This position is based on-site and requires excellent communication skills along with a proactive attitude towards problem-solving.Key ResponsibilitiesDeliver Level 1 technical support for desktops, laptops, printers, and other peripheral devices.Address user inquiries through our ticketing system, via phone, and face-to-face interactions.Diagnose and resolve hardware, software, network connectivity, and login issues.Install, configure, and maintain operating systems and essential business applications.Assist with Active Directory functions including password resets, user account creation, and permission management.Provide support for email and collaboration tools such as Outlook and Teams.Document, track, and update incidents and service requests within the ticketing system.Escalate complex problems to senior support teams when necessary.Help with device setup, imaging, and deployment for new employees.Maintain IT documentation, asset records, and support protocols.Adhere to IT security policies and best practices.Required Skills & Qualifications1–2 years of experience in IT Service Desk / Desktop Support / Technical Support.Basic understanding of Windows operating systems and Microsoft Office suite.Familiarity with Active Directory user management.Knowledge of fundamental networking concepts (Wi-Fi, VPN, IP configuration).Experience with a ticketing or helpdesk system.Strong analytical and troubleshooting skills.Exceptional communication and customer service abilities.Willingness to work on-site and provide hands-on support.Preferred Skills (Nice to Have)Experience with Office 365 / Microsoft 365 administration.Basic knowledge of hardware troubleshooting and device imaging.Relevant IT certifications such as CompTIA A+, ITIL Foundation, or similar.Key CompetenciesCustomer-focused mindsetEffective time management and prioritizationCollaborative team playerEagerness to learn and developAttention to detail

Join Runna as a Senior Software Engineer II, where you'll play a pivotal role in enhancing our software solutions. You will collaborate with cross-functional teams to design, develop, and implement robust applications that meet our customers' needs. Your expertise will help us push the boundaries of technology, ensuring our products remain at the forefront of the industry.

Why Join Faculty?Founded in 2014, Faculty believes that artificial intelligence (AI) is poised to be one of the most transformative technologies of our era. Over the years, we have collaborated with more than 350 global clients, helping them enhance their performance through human-centered AI solutions. Discover our impactful projects here.At Faculty, we prioritize genuine innovation over fleeting trends. We focus on developing and implementing responsible AI that truly makes a difference. Our clients range across various sectors, including government, finance, retail, energy, life sciences, and defense, and we possess an unmatched depth of technical, product, and delivery expertise.As our reputation grows, we continuously seek talented individuals who share our intellectual curiosity and are eager to leave a positive legacy through technology.AI is a groundbreaking technology; join us to explore its most powerful applications and help bring them to life.About the TeamWithin our Professional and Financial Services Business unit, we leverage over a decade of Applied AI experience to assist our clients in navigating a fast-evolving landscape. We create and integrate AI solutions that enhance efficiency, improve customer experience, and uncover commercial opportunities in uncertain markets. In a highly regulated industry, we see immense potential for meaningful innovation and are proud to set the standard for combining technical excellence with secure deployment.About the RoleAs a Lead Software Engineer, you will drive the technical direction and execution of complex, innovative AI projects. Acting as a technical authority, you will apply your expertise across various initiatives, from AI strategy formulation to client-side implementations, ensuring that architectural decisions are both robust and reliable. This role requires a blend of profound technical knowledge and strong leadership capabilities, emphasizing innovation, team development, and the creation of reusable solutions across the organization. If you are ready to oversee high-stakes projects and deliver impactful, innovative results, this is your opportunity to shape our future.What You'll Be DoingLeading the technical direction and delivery of sophisticated AI projects.Applying your technical expertise to various projects, ensuring sound architectural decisions.Driving innovation while fostering team growth and collaboration.Building reusable solutions that can be leveraged across the organization.

Join Our Team as a Staff Software EngineerAt Deliveroo, we are dedicated to revolutionizing the way people shop and dine. Our commitment to impact, innovation, and growth is at the core of everything we do. Our engineering teams are tasked with addressing intricate technical challenges within a global, three-sided marketplace, developing and scaling systems that cater to millions of customers, riders, and partners daily.From real-time logistics to robust infrastructure and marketplace optimization, we design, build, and operate the technology that fuels Deliveroo's expansive growth.We are seeking a Staff Software Engineer to become a key member of our London, UK - Hybrid (3 days in the office) team. In this pivotal role, you will help us craft technical solutions for essential business challenges and steer the technical direction for complex, high-scale systems.Discover our Engineering team — learn about our motivations, work culture, and what you can expect when you join us.

Join unlikelyAI as a Staff Software Engineer and be at the forefront of developing cutting-edge artificial intelligence solutions. In this pivotal role, you will collaborate with a talented team to design, implement, and optimize software systems that push the boundaries of technology.As a key member of our engineering team, you'll have the opportunity to influence the architecture of our products and mentor junior engineers. We are looking for innovative thinkers who thrive in a fast-paced environment and are passionate about building scalable and efficient software.

About the Role Samsara is hiring a Software Engineering Manager based in London (UK2) or remotely within the UK. This position leads a team of engineers focused on building software that helps businesses work smarter and more efficiently. What You Will Do Guide and support a team of engineers as they design, build, and deliver software products Shape product development by collaborating with cross-functional partners Encourage a team culture that values creativity, technical growth, and collaboration Work Location London, UK2 office Remote within the UK

We are seeking a Principal Software Engineer specialized in engineering applications to join our dynamic team at physicsx. In this role, you will lead the design and development of innovative software solutions that empower our engineering teams to achieve exceptional results. Your expertise will drive the implementation of cutting-edge technologies and methodologies, ensuring the highest standards of performance and reliability.As a Principal Software Engineer, you will collaborate closely with cross-functional teams, mentor junior engineers, and contribute to the overall technical strategy of our organization. You will have the opportunity to work on challenging projects that have a significant impact on our business and clients.

Join Multiverse as a Senior Software Engineer specializing in Platform Engineering. In this pivotal role, you will leverage your expertise to design, build, and enhance our platform, ensuring it meets the highest standards of performance and reliability. Collaborate with cross-functional teams to deliver robust solutions that drive the success of our innovative programs.

Role overview Based in London, the Senior Software Engineering Manager for Quality Engineering at Sony Interactive Entertainment Global leads a talented group of engineers. The position centers on defining and executing the strategy for software quality and performance across projects. Main responsibilities Shape the strategic direction for the quality engineering team Mentor and guide engineers, supporting their professional development Establish and maintain effective software testing practices Encourage ongoing improvement within the team Collaborate with cross-functional partners to ensure quality standards are met throughout the software development lifecycle Collaboration and impact This leadership role bridges engineering and quality, making sure software products meet rigorous standards from initial planning through release. Regular interaction with teams across Sony Interactive Entertainment Global helps to maintain and raise quality expectations company-wide.

Join our innovative team at getscope as a Senior Software Engineer. In this pivotal role, you will design, develop, and implement cutting-edge software solutions that will drive our projects forward. Collaborate with cross-functional teams to translate business needs into technical requirements while ensuring high quality and performance of applications.

Join our innovative team at AECOM as a Senior Software Engineer, where you will play a critical role in designing and developing cutting-edge software solutions. You will collaborate with cross-functional teams to bring complex projects to fruition, ensuring high quality and performance standards are met.

About the Role Shawbrook Bank is looking for a Senior Software Engineer in London. This role focuses on building software that supports business growth and improves efficiency. Collaboration with other engineers and teams is central to the work. What You Will Do Develop and maintain high-quality software tailored to customer needs Work closely with colleagues to deliver solutions that support the bank’s goals Contribute technical expertise to projects and ongoing improvements

About the PositionWe are seeking a highly skilled and motivated Senior Software Engineer - Generalist to join our innovative team at Anza. This role is pivotal in enhancing our Agave client and the overarching Solana network, focusing on performance, reliability, and security.About UsAnza is a cutting-edge R&D lab focused on the Solana blockchain, dedicated to revolutionizing blockchain performance and scalability. With a team of seasoned executives and core engineers, we tackle the most pressing challenges in the Web3 space. We believe in the power of collaboration and transparency, building robust protocols that can support the crypto ecosystem's growth and security.Your ResponsibilitiesDevelop and optimize our technical infrastructure, particularly the Agave client within the Solana ecosystem.Design and implement testing frameworks to simulate adversarial attacks and proactively identify vulnerabilities.Analyze performance metrics to pinpoint and resolve bottlenecks.Collaborate with subject matter experts to understand and define performance requirements for code components.Benchmark new solutions to enhance system reliability and performance.Work alongside cross-functional teams to architect solutions focused on scalability, security, and optimal performance.Contribute to all stages of the software development lifecycle, ensuring seamless transitions through development, staging, and production.Document architecture and processes to promote standardization and knowledge sharing across teams.

Join our dynamic team as a Staff Software Engineer at CyberArk, where you will be instrumental in developing cutting-edge security solutions. You will collaborate with a talented group of engineers to design, implement, and maintain software systems that protect against evolving cyber threats. Your expertise will contribute to innovative projects that shape the future of enterprise security.