Find a job 
Featured Companies 
Featured Universities 
For Companies At a Glance
- Tasks: Lead the development of innovative B2B SaaS solutions and mentor junior engineers.
- Company: Join a top tech firm revolutionising real-time infrastructure globally.
- Benefits: Earn up to ÂŁ130k, enjoy 28 days leave, and receive a personal development budget.
- Other info: Flexible remote work, dog-friendly office, and excellent career growth opportunities.
- Why this job: Make a real impact in tech while working with cutting-edge tools and a collaborative team.
- Qualifications: Experience in Ruby, TypeScript, React, and a passion for mentoring others.
The predicted salary is between 130000 - 130000 ÂŁ per year.
Opportunity for a full stack technologist to join a highly regarded provider of serverless real-time infrastructure for the Internet that processes billions of messages a day and powers everything from live chat and VoIP calls to real‑time pricing and stock availability for a multitude of services around the globe.
As a Full Stack Engineer / Technical Lead you’ll own the technical strategy and architecture for one or more Developer Ecosystems (iOS, Web, Infra/Automation), define and drive best practices for API and SDK design, ensuring consistency, usability and scalability and lead complex, cross‑team initiatives to expand and improve client libraries.
You’ll oversee the full development lifecycle, from design through to release, maintenance and product evolution, mentoring more junior engineers and reviewing contributions, raising the technical bar across the team. You’ll also guide and manage external contributors and open‑source collaboration and act as a key interface with the developer community, incorporating feedback into product direction.
Location / WFH: You can work from most of the time, collaborating via Slack and meeting up with the team at the dog‑friendly office in North London for tech talks, lunch and learn events etc. around once a month.
About you:
- You’re a senior software engineer with experience of building developer tooling and APIs
- You have strong hands‑on experience with Ruby, TypeScript and React
- You have experience within a product‑focused B2B SaaS environment
- You have experience of making technical decisions that drive projects and raise the bar
- You’re comfortable with AI tools such as Claude and Cursor and understand how they can be used to optimise processes
- You’re customer and product focussed
- You’re collaborative and pragmatic with experience of technically leading and mentoring others
- You have a thorough understanding of Computer Science fundamentals such as OOP, Data Structures and Design Patterns
What’s in it for you:
- Salary to ÂŁ130k
- 28 days annual leave
- Enhanced maternity and parental leave packages
- Your choice of kit and home‑station set up
- Personal learning and development budget (ÂŁ1000 p/a + 5% time to work on your own projects)
- BUPA Health Insurance + dental costs + mental health and wellness
- Pension, Life Assurance, Income Protection
- Fully paid one‑month sabbatical at five years’ service
- Gym subsidies, Cycle to Work scheme and more
At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We’re an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.
Full Stack Engineer / Technical Lead B2B SaaS in London employer: Client Server
Contact Detail:
Client Server Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Full Stack Engineer / Technical Lead B2B SaaS in London
✨Tip Number 1
Network like a pro! Reach out to your connections in the tech world, especially those who work in B2B SaaS. A friendly chat can lead to insider info about job openings or even a referral.
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your projects, especially those involving Ruby, TypeScript, and React. This gives potential employers a taste of what you can do beyond your CV.
✨Tip Number 3
Prepare for technical interviews by brushing up on your coding skills and system design principles. Practice common algorithms and data structures, as they often come up in interviews for Full Stack roles.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, we love seeing candidates who take that extra step!
We think you need these skills to ace Full Stack Engineer / Technical Lead B2B SaaS in London
Some tips for your application 🫡
Tailor Your CV: Make sure your CV reflects the skills and experiences that match the job description. Highlight your experience with Ruby, TypeScript, and React, and don’t forget to mention any B2B SaaS projects you've worked on!
Craft a Compelling Cover Letter: Your cover letter is your chance to shine! Use it to explain why you’re passionate about the role and how your background makes you a perfect fit. Be sure to mention your experience in leading teams and mentoring others.
Showcase Your Projects: If you’ve got a portfolio or GitHub with relevant projects, make sure to include that in your application. We love seeing real examples of your work, especially anything related to developer tooling or APIs!
Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you don’t miss out on any important updates from our team!
How to prepare for a job interview at Client Server
✨Know Your Tech Stack Inside Out
Make sure you’re well-versed in Ruby, TypeScript, and React. Brush up on your knowledge of APIs and SDK design principles, as you'll likely be asked to discuss how you’ve applied these in past projects. Be ready to share specific examples that highlight your technical decisions and their impact.
✨Showcase Your Leadership Skills
As a Technical Lead, you’ll need to demonstrate your ability to mentor and guide others. Prepare to discuss your experience in leading teams, managing cross-team initiatives, and how you've raised the technical bar in previous roles. Think of instances where you’ve successfully collaborated with junior engineers or external contributors.
✨Understand the Company’s Product and Culture
Research the company’s offerings and their approach to serverless infrastructure. Familiarise yourself with their developer community and any open-source projects they’re involved in. This will not only help you answer questions but also show your genuine interest in their work culture and values.
✨Prepare for Scenario-Based Questions
Expect to face scenario-based questions that assess your problem-solving skills and decision-making process. Think about challenges you’ve encountered in B2B SaaS environments and how you tackled them. Be ready to explain your thought process and the outcomes of your decisions.