At a Glance
- Tasks: Lead front-end and mobile tech strategy, mentor engineers, and drive innovative projects.
- Company: Join Flagstone, a dynamic online savings platform with a culture of kindness and growth.
- Benefits: Enjoy hybrid working, competitive bonuses, personal development budget, and private healthcare.
- Other info: Be part of a diverse team that values your voice and encourages your growth.
- Why this job: Make a real impact in financial technology while growing your skills in a supportive environment.
- Qualifications: Experience in front-end and mobile engineering, especially with React and React Native.
The predicted salary is between 75600 - 92400 £ per year.
Flagstone is an online savings platform, reinventing how individuals, businesses, and charities manage, protect, and grow their cash. A diverse group of people, bound by a collaborative spirit, and shared purpose. Our unique culture is our pride and joy and our competitive advantage.
To revolutionise the savings market, we need to be at our best. High performance takes more than talent – it takes a culture of kindness, respect, and growth. We’re building a diverse, inclusive community, where your voice is heard and valued. With close support and room to develop, you can surpass even your own expectations.
As a passionate and experienced Staff Engineer specialising in front-end and mobile, you'll set the technical bar for React and React Native across a tribe of squads, drive cross-team initiatives, and act as a force multiplier - coaching engineers, shaping architecture, and representing Flagstone in the wider engineering community.
What you’ll do:
- Take a leading role in driving front-end and mobile technical strategy across a tribe of 3–5 squads, ensuring the delivery of high-quality systems that meet our business objectives.
- Partner with squads, Engineering Team Leads, and Product to identify how technology can solve business challenges and take a long-term view on company value.
- Mentor and coach engineers, helping them grow their system design skills and ship robust, scalable solutions.
- Provide strategic guidance while also contributing hands-on to key projects.
- Set the front-end and mobile technical vision in collaboration with Engineering Team Leads, aligning with wider business objectives.
- Originate and lead horizontal engineering initiatives across the tribe; author and shepherd RFCs from proposal to adoption.
- Contribute directly to building and maintaining high-quality React and React Native systems while supporting and unblocking other engineers.
- Own cross-platform architecture decisions for web and mobile (React, React Native, TypeScript), ensuring scalable, reliable, and efficient design.
- Lead the evolution of our shared design system across web and mobile, driving consistency, accessibility, and developer velocity.
- Coach engineers in system design, coding standards, and testing; start initiatives that others complete.
- Drive adoption of front-end and mobile engineering practices through CoP leadership and engagement across the tribe.
- Identify emerging front-end and mobile technologies, build proof-of-concepts, and create roadmaps for adoption.
- Champion the "you build it, you run it" philosophy - driving pipeline observability, zero-downtime deployments, robust monitoring, and alerting for front-end applications.
- Design solution-wide UI resilience and own performance standards across web and mobile.
- Own threat modelling and security hardening for tribe front-end products; maintain high standards through code review and secure coding practices.
- Represent Flagstone externally through conference talks, podcasts, or published content; help attract senior engineering talent.
- Work closely with Product Managers, designers, stakeholders, and cross-functional teams to align technical decisions with business needs.
What you’ll bring:
- Proven experience in a Staff Engineer (or equivalent) role with a front-end and mobile focus.
- Deep expertise in React and React Native with TypeScript, including cross-platform architecture.
- Track record of owning and evolving a design system used across web and mobile applications.
- Strong system architecture and design skills, with thorough understanding of SOLID principles, TDD, DDD, and software design patterns.
- Experience designing for resilience and performance at scale.
- Experience with Azure development and cloud-based infrastructure, including CI/CD and pipeline observability.
- Experience owning threat modelling and security hardening for front-end products; strong grasp of OWASP and secure coding practices.
- Track record of originating and shepherding cross-team initiatives or RFCs to adoption.
- Excellent coaching, mentoring, and leadership skills.
- Strong problem-solving abilities and strategic thinking.
- Effective stakeholder management and influencing skills.
- Comfortable representing Flagstone externally or keen to start.
- Agile and Scrum practices experience.
How we reward you:
- Hybrid working - Spend at least 1 day a week with your team in our collaborative London office.
- Competitive bonus scheme - designed to reward and recognise high performance.
- Flexible benefits budget - a pot to fund meaningful benefits for you.
- A range of salary sacrifice options to help you make tax efficient savings.
- Around the World scheme - 3 months work from anywhere scheme.
- Mental wellbeing support – Access therapy and mental health sessions.
- Learning and development – £1,000 personal development budget.
- Private health care - Enjoy all the benefits AXA has to offer.
- Medical cash plan - To help you with the costs of dental and optical expenses.
- Life insurance and Income Protection - four times your annual salary.
- Matched pension contributions up to 5%.
- 25 days holiday - plus bank holidays, well-being days and volunteering days.
- Enhanced Parental Leave – enhanced maternity, paternity and adoption pay.
At Flagstone, we’re assembling a diverse team that defies our industry’s norms. We encourage you to apply, no matter your background.
Staff Engineer in London employer: Flagstone
Flagstone is an exceptional employer that prioritises the growth and development of its employees, offering a competitive bonus scheme and flexible benefits tailored to individual needs. With a strong focus on building trust and relationships within the financial services market, our work culture fosters collaboration and innovation, making it an ideal environment for those looking to make a meaningful impact in the Greater London area.
StudySmarter Expert Advice🤫
We think this is how you could land Staff Engineer in London
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Flagstone or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Flagstone.
✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Flagstone.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Flagstone that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace Staff Engineer in London
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Flagstone.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Flagstone and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at Flagstone
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Flagstone uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
