Workday Developer

RSM UK; Greater London; On-site; GBP 70,000 - 110,000; Full time

Job summary

RSM UK is seeking a senior Workday Build/Extend/ Prism Engineer to own the design, governance and delivery of enterprise Workday solutions across the platform. You will collaborate with product development, functional experts, change and architecture teams to deliver secure, scalable client-centric solutions on time.

Join a fast-growing firm, mentor the internal Workday team, and influence senior stakeholders.

Qualifications

• Hands-on Workday development experience (2+ years) or extended Workday ecosystem (4+ years).
• 5+ years in software development including Web apps.
• Strong knowledge of Workday data model, security, business processes, and reports.
• Proven delivery of production apps or portfolio walkthroughs.
• Proficiency with REST APIs and Workday integration patterns (EIB, Studio, Core Connectors).
• Solid SDLC understanding, peer reviews and testing strategies.
• Experience training or mentoring developers/analysts; ability to produce enablement assets.
• Excellent communication and stakeholder management skills.

Responsibilities

• End-to-end design and delivery of Workday solutions across Build, Extend, Prism and orchestrations.
• Translate complex requirements into secure, scalable client-centric solutions with trade-offs and risk.
• Embed SDLC governance, data models, UI, workflows, AI development and integration methods.
• Ensure solutions follow enterprise change management and release framework.
• Apply security architecture with appropriate auditing and gateway protections.
• Operate in a fast-paced delivery model, managing priorities and expectations.
• Drive speed to value while preserving quality and controls.
• Lead complex initiatives including multi-source orchestration and platform capabilities.

Skills

Workday development

Software development

Workday data model

REST APIs

SDLC

Mentoring

Documentation

Stakeholder management

Education

Computer Science/Information Systems/Engineering or equivalent

Workday certifications (HCM/FINS/Integrations/Reporting/Extend/Build/Prism)

Accounting qualification or relevant experience

Job description

As one of the world's largest networks of audit, tax and consulting firms, RSM 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 RSM is the place for you.

Purpose

As a senior and experienced Workday Build, Extend, Prism Engineer you will own the design, governance, 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 intesection between technology, architecture, and operations and you will act as a trusted advisor & inflencer 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, scaleable, client centric solutions - provide clearly articulated solution options. trade-offs and risks.
• Embed RSMs SDLC governance framework and stablish 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 segregration of duties). Ensuring that soltions are designed with a security-first principles with appropriate auditing and gateway protections.
• Operate effiectively within a fast paced, deadline drive 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 advance 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.

Diversity and Inclusion at RSM

At RSM, we want to create a strong sense of belonging so that people of all identities, backgrounds, and cultures feel they can bring their true self to work. Our clients come from all walks of life. We aim to achieve that same diversity of background, experience and perspective in our own teams, so that we can genuinely understand our client's needs. Diverse teams bring a broader range of ideas and insights to work. That's why we're working together to ensure our firm's principles and processes support a firm culture that embraces difference and strengthens inclusion.

At RSM we work hard to create an environment where our people can make a difference - to themselves, their career, their teams, and to the success of our firm and clients. We support all our people to work flexibly, to manage their family and other responsibilities alongside their work commitments; we believe this is key to achieving an inspiring and fulfilling working environment.