Senior Engineer, UI (C#)

Location: Hybrid, Newcastle or Remote (UK Based)
Reports to: Engineering Manager
Type: Full-time

At Oak Engage, we’re on an exciting growth journey—backed by a major investment from NorthEdge to scale our impact and redefine the future of employee engagement. Trusted by some of the UK’s biggest brands, including Aldi, Five Guys, and ITV, we help organisations connect, engage, and empower their people through smarter, more personalised internal communication. With our next stage of expansion underway, we’re building a team of bold, ambitious thinkers ready to make their mark at a high-growth, purpose-driven SaaS company. If you’re looking to shape the future of work and grow alongside a company that’s going places, now’s the time to join Oak.

We’re looking for a Senior Front-End Engineer with strong React experience to lead the development of user-facing features across Oak’s platform. You’ll play a key role in translating complex requirements into elegant, performant, and accessible interfaces that delight users and scale with our business.

This role is ideal for someone who enjoys owning front-end architecture decisions, mentoring developers, and collaborating cross-functionally to deliver best-in-class UX.

• Lead the design and development of responsive front-end components using React and other Javascript frameworks
• Collaborate with product managers and designers to scope and implement complex UI/UX solutions
• Ensure adherence to accessibility, scalability, and performance best practices
• Contribute to front-end architectural planning and long-term technical strategy
• Mentor junior developers and contribute to a high-quality engineering culture
• Champion clean, maintainable code and drive continuous improvement

• 5+ years in front-end development, including React and Javascript/Typescript
• Expertise in HTML, CSS, JavaScript, and integration with APIs
• Strong architectural thinking and experience with scalable component-based systems
• Familiarity with agile methodologies, Git, CI/CD, and DevOps practices - exposure  to Azure DevOps is a bonus
• A user-focused mindset with attention to detail and performance
  

• A meaningful role in a mission-led SaaS company with strong growth and product-market fit
• The chance to work with household brands and solve real-world enterprise challenges
• Flexible hybrid or remote working options
• Private health insurance, life insurance, and Employee Assistance Programme (EAP)
• Gym contribution and travel allowance
• Enhanced maternity, paternity, and discretionary leave
• Generous holiday policy (25 days + Bank Holidays + additional discretionary days)
• Regular team socials and a positive, collaborative culture

Hiring Manager Interview

• Deep dive into architecture, problem-solving, and team contributions
• Assess communication and curiosity

Technical Task or Live Pairing

• Realistic, time-bound task or live coding session
• Use structured rubric for fairness (avoid freeform “whiteboarding”)
• "Focus on team collaboration, code quality, and feedback" 

Peer Technical Panel/Culture Fit / CTO Chat - In person at our NCL HQ

• Includes cross-functional devs, product manager or designer
• Assess long-term growth potential and alignment with tech principles
• Opportunity for candidate to ask strategic questions

At Oak, we’re committed to building a diverse and inclusive workplace where everyone feels welcome, supported, and able to thrive.

We believe that different perspectives make us stronger, and we actively encourage applications from people of all backgrounds, experiences, and identities — including, but not limited to, race, ethnicity, gender, age, disability, sexual orientation, and socio-economic status.

We are an equal opportunities employer. All hiring decisions are based on business needs, role requirements, and individual qualifications — without bias or discrimination.

If you require any adjustments to the interview process or the role itself to support accessibility, please let us know — we’re happy to help.