Workday Developer in Crawley

As one of the world's largest networks of audit, tax and consulting firms, the company delivers big ideas and premium service to help middle‑market businesses thrive. We are a fast‑growing firm with big ambitions – we have a clear goal to become the premium adviser to the middle market, globally. This vision touches everything we do, motivating and inspiring us to become better every day. If you are looking for a firm where you can build a future and make an impact, then the company is the place for you.

Purpose

As a senior and experienced Workday Build, Extend, Prism Developer you will own the design, governance, and delivery of enterprise‑grade Workday solutions across the platform. Working with the product development, functional experts, change and architecture teams you will develop client‑centric, scalable and secure solutions, ensuring on‑time delivery in a demanding and deadline‑driven environment, whilst embedding robust governance, security and change management practices that de‑risk the business. The role operates in the intersection between technology, architecture, and operations and you will act as a trusted advisor and influencer to senior stakeholders, functional teams and other subject‑matter experts as part of their decision‑making. Mentoring and developing the skills of the internal Workday team and pushing the boundaries of the platform capabilities.

Responsibilities

• End‑to‑end design and delivery of Workday solutions across Build, Extend, Prism, and associated Orchestrations.
• Translate complex business requirements into secure, scalable, client‑centric solutions – provide clearly articulated solution options, trade‑offs, and risks.
• Embed RSMs SDLC governance framework and establish consistent data models, UI, workflows, AI development, and integration methodologies.
• Ensure all solutions adhere to the enterprise change management and release framework.
• Apply security architecture with product and solution design (domains, roles, access models and segregation of duties).
• Ensure that solutions are designed with a security‑first principle with appropriate auditing and gateway protections.
• Operate effectively within a fast‑paced, deadline‑driven delivery model, managing competing priorities and stakeholder expectations.
• Drive speed to value whilst maintaining quality and control discipline.
• Lead complex initiatives including multi‑source, orchestration and advanced platform capabilities.

Qualifications

Must‑Have

• 2+ years hands‑on Workday development (or 4+ years Workday ecosystem).
• 5+ years of software development experience including Web apps.
• Strong grasp of Workday data model, security, business processes, custom objects/orgs, calculated fields, and reports/RaaS.
• Demonstrated delivery of production apps (portfolio or walkthroughs at interview).
• Proficiency with REST APIs and Workday Integration patterns (EIB, Studio, Core Connectors).
• Solid understanding of SDLC, peer reviews, and test strategies.
• Experience training or mentoring developers/analysts; ability to produce clear enablement assets.
• Excellent communication, stakeholder management, and documentation skills.

Nice‑to‑Have

• Whole platform domain exposure including FIN/HCM/Payroll/Security – e.g., approvals, exceptions, vendor onboarding, expense governance, journals, controls, agentic AI and machine learning, lifecycle.
• Experience in AI product development.
• Familiarity with Workday BIRT, Workday Reporting (advanced), Time Tracking.
• Scripting experience (e.g., JavaScript/TypeScript, Python) for tooling and documentation automation.
• Knowledge of privacy & compliance (GDPR, SOX, ISO27001) and secure coding practices.

Education & Certifications

• Computer Science, Information Systems, Engineering or equivalent experience.
• Workday certifications (HCM/FINS/Integrations/Reporting/Extend/Build/Prism) strongly preferred.
• Accounting qualification or relevant experience.