Senior ServiceNow Developer

Permanent position based in Warwick with a hybrid work option.

Job Purpose

Senior ServiceNow Developer focused on HR Service Delivery (HRSD). Design, build, and stabilize enterprise‑grade HRSD solutions that are secure, scalable, and aligned to platform standards.

What you'll do

• 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., SuccessFactors) 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 ServiceNow 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.

About you

• Bachelor’s degree in Computer Science or equivalent experience.
• Strong hands‑on ServiceNow development experience (JavaScript and ServiceNow 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 leadership.
• Proven ability to manage multiple priorities in a fast‑paced environment and work effectively across multiple geographies.
• Strong relationship building, facilitation, and stakeholder management skills.
• Proven hands‑on experience configuring and supporting HRSD Lifecycle Events for employee transitions, including JML (onboarding, internal movement, offboarding), and driving automation across multiple departments.
• Experience translating HR onboarding/movement/leaver requirements into lifecycle event activity design that improves employee experience and reduces manual handoffs.
• Hands‑on experience configuring lifecycle event components including Lifecycle Event definitions, Activity Sets, Activities, stage design, triggers/conditions, and exception handling for JML scenarios.

Certifications

• Certified ServiceNow System Administrator (CSA)
• Certified ServiceNow HRSD Administrator
• Certified Implementation Specialist (CIS) – HRSD
• Preferred certifications: ServiceNow Application Developer / ServiceNow Developer certification

What you'll get

• Competitive Salary, based on capability and experience
• Bonus of up to 30% based on personal and company performance
• Additional benefits include a competitive contributory pension scheme where we will double match your contribution to a maximum company contribution of 12%
• Flexible benefits such as a cycle scheme, share incentive plan, technology schemes
• Access to apps such as digital GP service for round‑the‑clock access to GP video consultations and NHS repeat prescriptions, wellbeing app to support your health and fitness
• Access to Work + Family Space, providing support and resources for work and family life, including paid emergency childcare and eldercare