About the Role
Management Level E Equiniti provides comprehensive solutions to support organizations throughout their corporate lifecycle, including managing shareholder engagement, maintaining stock registers, facilitating ownership transfers, enabling shareholder meetings, paying dividends, supporting IPOs, and administering employee equity plans. We are dedicated to revolutionizing shareholder services by developing digital solutions that facilitate dematerialization for issuers and shareholders. EQ is a fintech that connects the future of capital, communications, and governance, building trust and confidence in every market we serve. Our values set the core foundations to our success. We are TRUSTED to deliver on our commitments, COMMERCIAL in building long term value, COLLABORATIVE in our approach and we IMPROVE by continually enhancing our skills and services. There has never been a better time to join EQ. We are seeking a Principal Software Engineer to provide deep technical leadership, drive engineering excellence, and influence product direction across our SaaS ecosystem. In this role, you will architect, design, and deliver high‑quality software solutions across backend and frontend platforms, while guiding teams, shaping processes, and championing innovation. What You’ll Do Lead architecture, design, and development of complex, enterprise‑grade features and platforms across backend and frontend systems. Drive technical excellence through engineering standards, code reviews, quality practices, and governance. Evaluate emerging technologies and guide adoption across teams to improve performance, scalability, security, and user experience. Provide technical leadership across microservices, APIs, and frontend applications built using modern frameworks. Mentor engineers, support talent development, and promote a high‑performance engineering culture. Partner with product and engineering leadership to shape technical roadmaps, balance business needs, and reduce technical debt. Solve complex technical challenges and influence decisions across teams, stakeholders, and customers. What You Bring Extensive experience building and scaling SaaS or product‑based systems. Deep expertise in: Backend: .NET Core, C#, Web API, Microservices, SQL Server Frontend: React.js, JavaScript (ES6+), HTML5, CSS3 Cloud: Azure and/or AWS Strong architectural and systems thinking across: Microservices, containerization, CI/CD Frontend architecture, state management, and performance optimization Security, resiliency, and scalability Experience designing and developing end‑to‑end solutions spanning UI, APIs, and data layers. Proven ability to influence cross‑functional teams and drive engineering transformation. Excellent communication, critical thinking, and technical leadership skills. Nice to Have Experience in Financial Services. Knowledge of identity and access management technologies (OAuth2, OpenID Connect, Okta, ADFS, IdentityServer). Experience with CMS platforms such as Umbraco or SharePoint. Familiarity with modern frontend tooling and practices: State management (Redux, Context API) Component libraries and design systems Frontend testing frameworks and performance optimization techniques Education & Experience Bachelor’s degree in Engineering / Computer Science (required). Proven experience leading and delivering complex product initiatives in agile environments. Demonstrated ability to act as a technical authority across backend, frontend, and cloud platforms. We are committed to equality of opportunity for all staff and applications from individuals are encouraged regardless of age, disability, sex, gender reassignment, sexual orientation, pregnancy and maternity, race, religion or belief and marriage and civil partnerships. Please note any offer of employment is subject to satisfactory pre-employment screening checks. Our people and platforms connect businesses with markets, engage customers with their investments and allow organisations to grow and transform. Our vision is to help businesses and individuals succeed, creating positive experiences for the millions of people who rely on us for a sustainable future. We provide share registration, deliver services for reward and benefits and develop solutions for customer management in regulated industries. Our work with some of the most significant organisations in the UK and US means we engage with 29 million of their shareholders, pensioners and employees.