Description
We're a business navigating a period of real change, and we know that lasting progress is only possible when the people foundations underneath it are solid. We're looking for a Senior HR Generalist who takes genuine pride in getting things right. Someone who understands that brilliant HR is built on consistent, best-practice processes, trusted relationships, and a deep commitment to the experience people have at work.
This is a hands-on, end-to-end generalist role. You’ll be the primary HR contact for our UK and EU population of around 100 people, partnering closely with managers and employees across the full employee lifecycle; from the moment someone accepts an offer to the day they leave, and everything in between. The ideal candidate is a proactive HR professional with strong knowledge of employment practices, employee relations, payroll administration, and HR operations, comfortable handling operational HR responsibilities in a fast-paced, change-rich environment.
Key Responsibilities
HR Operations & Compliance
Maintain accurate employee records and HR documentation
Ensure compliance with UK labour laws, company policies, and regulatory requirements
Support audits, reporting, and HR metrics tracking
Assist with policy creation, implementation, and updates
Manage visa applications and maintenance of sponsored employees
Talent Acquisition & Onboarding
Partner with hiring managers to support end to end recruitment activities and hiring processes in the UK and EU to ensure the acquisition of top talent
Coordinate onboarding and orientation programs for new hires in UK and EU
Help improve employer branding and candidate experience initiatives
Maintain and build relationships with recruitment agencies, ensuring up to date PSL which are fit for purpose
Compensation, Benefits & Employee Experience
Support benefits administration and employee inquiries
Administer and oversee monthly payroll in partnership with Mexico Service Centre, including:
Manage payroll reporting for EE shares, pension, healthcare schemes and internal finance reporting
Oversee annual reporting of P11D’s, P60’s. P45’s, and other HMRC requirements
Administer all benefits including annual renewals, as well as the evaluation and research of market trends and proposing potential changes based on employee needs
Employee Relations & HR Support
Serve as a trusted advisor to managers and employees on HR policies, procedures, and workplace matters
Handle employee relations issues, investigations, conflict resolution, and disciplinary processes in line with company practices
Support performance management processes, including reviews, coaching, and development planning
Act as point of contact for general inquiries
Learning & Organizational Development
Manage and oversee atgCareers page and ATG Learning Academy programme
Collaborate with internal subject matter experts to design interactive courses to be delivered internally
Establish robust tracking mechanisms to measure participation, progress and outcomes of Academy courses, utilising feedback to drive improvement
Collaborate with Head of HR on developing and hosting Manager Training Sessions
Employee Experience
Assist in driving employee engagement, wellbeing, and retention initiatives in local offices in UK and EU
Support in the administration of the annual engagement survey and pulse surveys
Partner with Office Manager on office activities, like monthly socials, summer/winter parties and other social/well-being initiatives
Support and partner with stakeholders on global and regional newsletters
WHAT YOU CAN EXPECT
A role with genuine breadth: no two days will look the same, and your remit will grow as you do.
Real proximity to the business: you’ll be a visible, valued part of the team, not a back-office function.
The chance to shape how we do HR, not just maintain what already exists.
A supportive environment where good ideas are welcomed and people are treated as adults.
Key Requirements
Required
Bachelor’s degree in Human Resources, Business Administration, or related field
5–8+ years of generalist HR experience
Strong knowledge of UK employment law and HR best practices
Experience handling employee relations and performance management matters
Excellent interpersonal, communication, and problem-solving skills
Ability to manage confidential information with discretion
Proficiency with HRIS systems and data analysis tools
Accuracy and attention to detail
Strong customer service ethos and proven resilience
Excellent interpersonal and communication skills (both written and verbal)
Strong initiative and ability to pro-actively recommend improvements to HR processes & services
A positive, adaptable, and professional working attitude is essential
Preferred
CIPD qualified (Level 5 or above) or working towards chartership
Exposure to German HR practices
Experience supporting organizational change initiatives
We recognise that not every candidate will tick every box. If you have strong generalist HR experience and a genuine passion for the people side of a growing tech business, we’d love to hear from you.
