Senior Software Engineer - ServiceNow

About the Role

National Energy System Operator (NESO) recognises the potential of bright and talented individuals, and we encourage you to join us as Great Britain’s energy system undergoes an ambitious, exciting, and vital transformation. Together with industry, we are creating a cleaner, more sustainable energy future. We are seeking a highly skilled Senior ServiceNow Engineer to play a key role in the greenfield implementation of our ServiceNow platform. This role requires deep technical expertise in ServiceNow, a strong understanding of DevOps & Agile delivery practices, and a mindset that maximises Out‑of‑Box (OOB) functionality to ensure a scalable, maintainable, and upgrade‑friendly platform. The ideal candidate will be hands-on, collaborative, and able to partner with product owners, architects, developers, and business stakeholders to build a modern, resilient, and future-ready digital workflow ecosystem. This role can be based from Wokingham or Warwick and we continue to offer hybrid working from office and home. We are open to full time and part time applicants, as well as flexible working arrangements.

Key Accountabilities

• Platform Implementation & Development: Participate in and lead technical design and development for a greenfield ServiceNow implementation across ITSM, ITOM, ITAM, HRSD, or other workflow modules. Configure and develop ServiceNow applications while prioritising OOB capabilities, minimising customisation, and ensuring adherence to platform best practices. Implement and maintain integrations using IntegrationHub, REST/SOAP APIs, and industry-standard integration patterns. Build and maintain CMDB, Discovery, Service Mapping, and automation frameworks in line with service management foundations.
• DevOps & Agile Delivery: Work in an Agile Scrum environment, contributing to backlog refinement, sprint planning, and continuous delivery. Implement automated testing, CI/CD pipelines, and version control using DevOps toolchains (Azure DevOps, ATF, etc.). Support continuous improvement, iterative releases, and feature enhancements aligned with DevOps culture.
• Platform Governance & Best Practices: Ensure compliance with platform governance, architecture standards, and development frameworks. Maintain comprehensive technical documentation, including solution designs, workflows, and data models. Conduct peer reviews, ensure code quality, and enforce architectural patterns that support reliability, security, and performance. Drive platform upgrades ensuring minimal technical debt and full compatibility with OOB features.
• Stakeholder Engagement: Collaborate with product owners, architects, service managers, and business units to translate requirements into scalable technical solutions. Act as a ServiceNow subject matter expert (SME) providing guidance and mentoring to junior developers and platform admins. Provide L3 support for complex incidents, platform issues, and deployment challenges.

About You

• Strong hands-on ServiceNow engineering experience with progressive responsibility.
• Strong expertise across multiple ServiceNow modules (e.g., ITSM, ITOM, ITAM, HRSD, SPM).
• Proven experience in greenfield implementations and architecting solutions with OOB-first principles.
• Solid understanding of Agile methodologies and working experience in Scrum teams.
• Hands-on DevOps experience with automated testing (ATF), CI/CD pipelines, and deployment orchestration.
• Proficiency in JavaScript, Glide API, Flow Designer, UI policies, Client Scripts, Business Rules, and Data Policies.
• Experience with CMDB, integrations, Discovery, MID Servers, and event-based automation.
• Strong knowledge of platform performance tuning, security (ACLs), and instance management.
• ServiceNow certifications such as CSA, CAD, CIS (ITSM/ITOM/HRSD or others) preferred.

Nice-to-Have

• Experience in ServiceNow SPM, VR, or SecOps modules.
• Exposure to cloud platforms (Azure/AWS), SRE practices, or automation frameworks (Ansible, Terraform).
• Experience supporting multi-instance or enterprise-scale ServiceNow deployments.

Education

• Bachelor’s degree in Computer Science, Engineering, Information Systems, or equivalent experience.

Research shows that some people may hesitate to apply unless they meet every requirement. At NESO, we believe potential comes in many forms and we’re committed to a fair, inclusive recruitment process where everyone can show their talents. We celebrate the difference people can bring into our organisation, and welcome and encourage applicants with diverse experiences and backgrounds to build a workforce that feels valued and respected and represents the communities we serve.

About What You’ll Get

• A competitive salary between £56,000 - £62,000pa – dependent on experience and capability.
• As well as your base salary, you will receive a bonus based on company performance, 26 days annual leave as standard and a competitive contributory pension scheme where we will double match your contribution to a maximum company contribution of 12%.
• Full support and career-development resources to expand your skills, enhance your expertise, and maximise your potential along your career journey.
• A diverse and inclusive community of belonging, where teammates are empowered to bring ideas to the table.
• Generous Total Rewards Plan – comprising of health, finance and wealth, work/life balance, and career benefits.

About Us

National Energy System Operator’s (NESO) mission is to facilitate the decarbonisation of Great Britain’s energy network and ensure the delivery of reliable, affordable, and clean electricity for consumers. We work with stakeholders across the whole energy industry to plan for future network needs, using a wider adoption of technology and changes in consumer behaviour, as well as ensuring we have the right markets, networks, and frameworks in place, to transform the way we operate tomorrow. Join us, and let’s energise progress. Your energy, our future, together.

In Autumn of 2024, the ESO transitioned to National Energy System Operator, or NESO for short. Previously denoted as the Future System Operator (or FSO), the new National Energy System Operator is the independent body responsible for planning Great Britain’s electricity and gas networks and operating the electricity system. The ESO, including all of its existing roles, are now at the heart of the new National Energy System Operator. As NESO, we will build on our existing roles, capabilities, and ways of working significantly to create an organisation the energy system and its users’ need. Our new capabilities will enable us to look across vectors, including electricity, natural gas and hydrogen, and crucially consider the trade-offs between them. The organisation is set up as a public corporation with its own Board of independent directors, with complete operational independence from government, the regulator and any and all commercial interest. As was the ESO, NESO will be licensed and regulated by Ofgem through price control agreements and obligated to identify optimal solutions to system operations and planning in the most sustainable, affordable and secure way for all.

More Information

This role closes on 10th February 2026 at 23:59, however we encourage candidates to submit their application as early as possible and not wait until the published closing date as this can vary. We work towards the highest standards in everything we do, including how we support, value and develop our people. Our aim is to encourage and support employees to thrive and be the best they can be. We celebrate the difference people can bring into our organisation, and welcome and encourage applicants with diverse experiences and backgrounds, and offer flexible and tailored support, at home and in the office. We’re committed to building a workforce that represents the communities we serve, and a working environment in which each individual feels valued, respected, fairly treated, and able to reach their full potential.