Fullstack Developer - Sales

Xero; City Of London; Hybrid; GBP 65,000 - 85,000; Full time

Job summary

An innovative technology firm is seeking a Fullstack Developer to join their team. This role entails leading technical demos, developing custom platform solutions, and driving revenue growth through robust API integration. The ideal candidate will have extensive experience in enterprise software engineering, particularly with API and full-stack development. This position offers benefits, a hybrid work environment, and opportunities for growth and progression.

Benefits

Pension

Health insurance

Employee Share Plan

Generous vacation

Growth and progression opportunities

Strong social culture

Healthy work-life balance

Qualifications

• Minimum of five years' experience with enterprise software engineering.
• Experience building on SaaS platforms like Salesforce or ServiceNow.
• Proficiency with AI development tools for rapid prototyping.

Responsibilities

• Lead technical demos showcasing API extensibility.
• Build compelling proof-of-concepts addressing specific customer requirements.
• Create reusable solution accelerators for broader market adoption.

Skills

API development

Full-stack development

React

Node.js

Python

Technical pre-sales

Executive presentation skills

SaaS platforms

AI development tools

Job description

Scheduling isn't simply filling shifts. It's finding the sweet spot that enables businesses to grow and team members to enjoy the perfect work/life balance.

At Planday from Xero, we aim to use Agentic AI to build a future where managers can seamlessly free up invaluable time for their business and teams. We're not just building software: we're on a mission to make shift work more human, to change work/life balance from a luxury to a reality for all shift workers. We're using advanced technology to help humans reach their full potential. At work and in life.

Founded in 2004, Planday is headquartered in Copenhagen, Denmark and helps create perfect schedules for hundreds of thousands of users across the world.

As part of our growth towards more mid‑market and enterprise focus, we are looking for a new colleague to join as Fullstack Developer – Sales. In this role, you will be reporting directly to the VP of Sales and your focus will be on accelerating mid‑market and enterprise revenue growth by architecting custom platform solutions and seamless ecosystem connectivity for these customers.

This role combines deep technical expertise with sales acumen, directly participating in sales cycles to demonstrate how Planday's API enables bespoke features, cross‑platform data flows, and tailored solutions that win deals.

You'll be the bridge between customer requirements and technical delivery, making the impossible possible through creative solutions, utilising Planday’s strong core platform. Additionally, you'll enable Planday to seamlessly integrate into best‑in‑breed tech stacks, positioning us as the gold standard for businesses that demand both specialized excellence and ecosystem connectivity.

What you’ll do

• Lead technical demos showcasing API extensibility and custom capabilities
• Build compelling proof‑of‑concepts addressing specific customer requirements
• Answer ecosystem and data synchronization questions during sales calls
• Design custom features leveraging Planday's API to extend product capabilities
• Create bespoke workflows, dashboards, and business logic for enterprise needs
• Enable seamless data flows between Planday and enterprise systems (HRIS, ERP, payroll)
• Drive API roadmap with revenue‑backed customer requirements
• Create reusable solution accelerators for broader market adoption

What you’ll bring with you

• A minimum of five years' experience with enterprise software engineering, focusing on API development and full‑stack development (React, Node.js, Python or similar)
• Experience building on SaaS platforms (Salesforce, ServiceNow)
• Proficiency with AI development tools (GitHub Copilot, Cursor, ChatGPT, Claude Code) for rapid prototyping
• Technical pre‑sales or solution engineering for enterprise deals
• Executive presentation skills translating technical concepts to business value
• Knowledge of enterprise tech stacks and requirements (e.g., GDPR compliance, SSO, RBAC)

Please note: this role would include 10‑20% travel for customer engagements and technical workshops.

At Planday, we offer you

• Benefits like pension, health insurance, inclusive support for new parents, and generous vacation
• An Employee Share Plan in addition to your annual base salary
• Growth and progression opportunities – we want you to grow with us
• Hybrid work environment
• Strong social culture with plenty of team and company activities
• Meaningful work – everyone at Planday contributes to improving the lives of shift workers around the globe
• Healthy work‑life balance and an autonomous approach to work. We trust in you and your abilities

Finally, our offices are not just workplaces (although they are pretty nice and well‑located, we have to say!). Plandayers are open and welcoming and at Planday, everyone has the freedom and support to show their true self at work.

At Planday, we firmly believe that diversity and inclusion are the cornerstones of innovation and a vibrant workplace culture, and we highly value the strength that diverse backgrounds offer.

As an equal opportunity employer, we strive to create an equitable experience for all our candidates throughout the process. Please let us know if you need reasonable accommodation during the application or interview process.

All applicants will be considered for employment without attention to any personal characteristics.