Senior ServiceNow Developer

About us

At National Grid, our commitment to a cleaner, greener energy future is powered by the dedication and ingenuity of our people. Join our team as a Senior Service Now Developer and be a part of something bigger-where your unique skills and passions can make a real difference. Together, we are superpowered.

National Grid is hiring a Senior Service Now Developer on a permanent basis. This position is based in Warwick. This role operates under a hybrid working model. Hybrid work expectations are subject to business needs and company policy.

As Senior Service Now Developer, you'll be responsible for designing, building, and stabilizing enterprise-grade HRSD solutions that are secure, scalable, and aligned to platform standards. You'll work closely with HR stakeholders, technical teams, and delivery partners to translate business objectives into practical Service Now solutions, while enforcing engineering discipline and driving outcomes end-to-end. You'll engage with business stakeholders, leading working sessions, presenting solution options, and driving delivery outcomes.

You'll influence decisions, align cross-functional teams, and ensure high-quality delivery across internal and vendor resources.

• Lead end-to-end delivery of HRSD enhancements: design, build, test, deploy, and stabilize solutions in a global enterprise environment.
• Own HRSD technical design and configuration quality, ensuring solutions follow secure SDLC practices and remain supportable over time.
• Provide hands-on HRSD expertise with a strong focus on HR integrations and orchestration-particularly HR system integrations (e.g., Success Factors) that enable automation initiatives.
• Define and enforce engineering standards (coding standards, architecture patterns, code/model review checklists) to prevent customization creep and ensure long-term maintainability.
• Provide technical leadership to development teams: mentor developers, perform peer reviews, and establish quality gates to improve consistency and reduce rework.
• Own and maintain integrations (APIs/web services, data mapping, integration standards) to ensure reliability, performance, and strong employee experience across connected systems.
• Support platform reliability: monitor health/usage/compliance, perform security and performance audits, and drive remediation actions through to completion.
• Partner with Service Now Support and internal teams on platform upgrades and patching (major version planning, regression strategy, and post-upgrade validation)
• Lead vendor resources when assigned: provide direction, oversee technical execution, enforce quality standards, and ensure deliverables meet National Grid expectations.
• Validate and triage new demands/change requests to ensure alignment with platform guardrails, design standards, and enterprise risk posture.
• Lead the design and implementation of HRSD Lifecycle Events for Joiner/Mover/Leaver (JML) experiences (onboarding, internal transfers/role changes, and offboarding), ensuring a consistent and automated employee journey.
• Configure and optimize lifecycle event structures (event definitions, activity sets/activities, stages, and assignment patterns) to coordinate work across HR, IT, Facilities, Payroll, and Security as needed.
• Partner with HR and Identity stakeholders to ensure lifecycle event journeys are auditable, compliant, and measurable, with clear ownership, timelines, and exception handling.

• Bachelor’s degree in Computer Science or equivalent experience.
• Strong hands-on Service Now development experience (JavaScript and Service Now scripting) with solid understanding of secure SDLC practices.
• Strong HRSD domain capability and experience delivering HRSD solutions in an enterprise environment.
• Experience delivering at least one end-to-end implementation in HRSD (and exposure to S2P is an advantage).
• Preferred experience with Employee Center and Virtual Agent (where used in HR experiences).
• Demonstrated experience designing and supporting integrations (REST/API), web services, data mapping) and troubleshooting integration performance and reliability.
• Strong analytical skills: able to translate real-world business requirements into clear technical designs and actionable delivery plans.
• Ability to balance business needs, cost, risk, and technology priorities to determine the best solution.
• Strong written and verbal communication skills, with the ability to influence stakeholders and drive alignment across IT and business…