Full Stack Software Engineer

Walkingonearth; City of London; Hybrid; GBP 60,000 - 80,000; Full time

Job summary

A health technology startup is seeking a Software Engineer to help develop an AI-based health coach aimed at reducing stress. The role involves front-end and back-end development, collaboration with cross-functional teams, and creating innovative solutions. Candidates should have experience with React and a passion for promoting wellbeing through technology. Competitive salary and benefits package offered.

Benefits

Competitive Salary & Options

25 days holiday

Unlimited holistic health days

Enhanced parental policies

Pension scheme

Flexible working

Free private wellbeing sessions

Weekly team wellbeing sessions

Annual Company retreat

Qualifications

• 5+ years of experience in software engineering, developing consumer-facing apps.
• Strong front-end development with React and full-stack proficiency.
• Experience in mobile app development is a plus.

Responsibilities

• Understand business needs and provide technical expertise.
• Collaborate with product managers to define technical requirements.
• Design and develop solutions to address business problems.

Skills

Software engineering expertise

React experience

Collaboration skills

Problem ownership

Interest in wellbeing

Tools

AWS

PostgreSQL

Django

GraphQL

React Native

Job description

👋 About Us

What if we could use the efficiency gains in science and technology to understand and even control our stress response? What if we can learn how to regulate our stress proactively to address our health before we reach a state of illness? Walking on Earth is transforming the way people manage stress by developing the world’s first AI Stress Coach that builds resilience to stress with micro moments of recovery during the working day.

The WONE Method blends the latest advances in AI technology and neuroscience to measure stress and deliver personalised health plans from world leading experts. Walking on Earth’s journey has been one of high growth and impact, with 3x YoY growth, 8x engagement compared to industry standard and 66% of employees reporting a reduction in stress. WONE supports large, high performing businesses to break the cycle of chronic stress and supercharge business performance.

We’re a fast-growing, mission driven startup. We have an experienced leadership team ex. Google, Treatwell, Deliveroo, BenevolentAI and are VC backed with word class investors & advisors incl. Arianna Huffington & Brent Hoberman. We live and breathe by example to create a truly authentic team culture, with high performance and wellbeing at the core.

💼 About the Role

We’re looking for a stellar Software Engineer to help shape and grow the WONE app, our B2B2C platform that is redefining how we measure, understand, and reduce stress — before it becomes chronic and harmful. At the heart of our mission is the WONE Coach: an intelligent, empathetic, AI-native companion that uses real-time user data, behavioural science, and personalisation to guide people towards resilience and performance.

You’ll be instrumental in bringing experiences to life that integrate seamlessly into people’s daily lives — using contextual signals, physiological data, and expert content to deliver just-in-time interventions that reduce stress in the moment and change behaviour over the long term to drive measurable ROI and VOI for users and employers.

We\'re looking for a highly skilled and adaptable Software Engineer who thrives in an individual contributor role within a collaborative team. You’ll be taking ownership of complex problems to deliver innovative, end-to-end solutions. You’ll work closely with cross-functional teams to define technical requirements, make trade-offs and ensure that solutions are both sustainable and maintainable in the long term. Experience with mobile app development, particularly React Native, is a strong plus and a passion for promoting wellbeing and reducing stress through technology is essential. This role requires wearing many hats, collaborating across product phases and contributing to a meaningful mission

🔥 Key Responsibilities

• Understand business needs and provide technical expertise to stakeholders
• Work closely with product managers and designers to define technical requirements and articulate trade-offs
• Design and develop comprehensive end-to-end solutions to business problems
• Monitor, maintain, and ensure the smooth operation of developed solutions
• Contribute to the enhancement of team processes and practices
• Use AI tools and prototyping platforms to speed up coding, ideation, and testing cycles.
• Drive a culture of shipping value early and often, iterating based on evidence.

😊 About You

• A highly experienced Software Engineer with around 5 years + software engineering expertise, having developed consumer facing apps
• Full stack experience - strong with frontend technologies (React experience essential) and proficient across infrastructure and backend (ideally Python, or TypeScript/JavaScript)
• Strong collaboration skills across Product Discovery and Product Delivery phases
• Capable of taking ownership of a problem and delivering comprehensive solutions
• Considers the long-term sustainability of the products developed, including monitoring and maintenance
• Passionate about building innovative solutions and thriving as an individual contributor (IC) within a dynamic team
• Experience with mobile app development (React Native) is a plus, especially for those with strong web frontend experience
• An interest in reducing stress and promoting wellbeing through technology
• Experience with AI coding tools

📃 Preferred Qualifications

• System design and architecture
• Technical writing
• Testing
• Automation
• SQL
• Analytics
• Services development
• API development
• Web development
• Mobile development
• Security
• Performance optimisations

Tech stack

• Infrastructure - AWS
• Backend Database - PostgreSQL
• Backend Application - Django, Python, GraphQL
• Frontend Web - React, TypeScript
• Frontend Mobile - React Native, TypeScript

🤸🏽♂️ Benefits & Perks

• Competitive Salary & Options
• 25 days holiday
• Unlimited holistic health days
• Enhanced parental policies
• Pension scheme
• Flexible working
• Free private wellbeing sessions
• Weekly team wellbeing sessions
• Annual Company retreat

How to apply

If you want to solve the world’s stress epidemic by building the first of its kind AI health coach, you thrive on getting meaningful features into the hands of users quickly, and can harness AI to 10x your impact, we’d love to hear from you. Please submit your CV and cover letter, answering the following questions.

• Tell us why should we hire you, above other candidates
• Why are you interested in WONE’s mission?
• How have you leveraged AI tools in your work?
• Reading the JD, what excited you most about building an AI Health Coach?
• What package are you looking for in your next role?

❓We use cover letters to strategically and carefully select who may be a good fit for moving into the interview stage; as such, we will not move forward with applicants who do not submit a cover letter.