At a Glance
- Tasks: Build and maintain innovative features using cutting-edge tech like React and Node.js.
- Company: Join Zelt, a high-growth SaaS company transforming people operations.
- Benefits: Competitive salary, health insurance, and opportunities for professional growth.
- Other info: Be part of a collaborative culture that values curiosity and technical excellence.
- Why this job: Make a real impact on modern companies while learning from experienced engineers.
- Qualifications: 4-7 years of fullstack experience with strong skills in React and Node.js.
The predicted salary is between 50000 - 60000 £ per year.
Zelt is on a mission to rebuild how organisations run. Our all-in-one platform helps modern companies manage their people operations across payroll, onboarding, time off, IT provisioning and more, in a seamless and automated way. We are the only platform on G2 named a Global Momentum Leader across HR, Payroll and IT, and we are just getting started. Our product is technically ambitious, structurally different from anything else on the market, and already trusted by forward-thinking companies.
As a Fullstack Engineer at Zelt you will help build features end-to-end, from implementation to testing and launch. You will work closely with senior engineers who will guide architecture decisions while you focus on delivering high-quality code and learning how to scale a SaaS product. This is the ideal moment to join: Zelt has product-market fit and strong backing, yet it is still early enough that your work will influence the platform’s growth and user experience. You will see your code reach customers quickly and have visible impact. You will join a lean, product-focused team where your ideas count, your growth is supported, and your work helps shape a platform used every day by modern companies.
What you will do:
- Implement and maintain features across the stack using React, TypeScript, Node.js, NestJS, PostgreSQL and AWS
- Collaborate closely with senior engineers, product and design to deliver well-scoped features from start to finish
- Participate in code reviews, share knowledge and grow your skills while supporting a collaborative team culture
- Write clean, maintainable, well-tested code and follow engineering best practices
- Contribute to improving developer workflows and tooling (GitHub, GitHub Actions, Slack, Linear, Sentry, SolarWinds)
- Learn about and contribute to infrastructure (Docker, AWS ECS, RDS, S3, SES, CloudFront, CDK) with support from senior teammates.
What we are looking for:
- 4-7 years of experience shipping fullstack features in a product-driven team
- Strong skills with React, TypeScript, Node.js, and PostgreSQL
- Working knowledge of AWS services (ECS, RDS, S3, CloudFront, etc.)
- Hands on with modern workflows and tooling, for example GitHub, GitHub Actions, Linear, Sentry
- Ability to scope medium sized tasks, estimate, and deliver end to end within established patterns
- Eagerness to learn from senior teammates, share knowledge, and grow technical depth
- Strong communication skills and a collaborative, problem-solving mindset.
Nice to have:
- Experience working in a startup or scale-up environment
- Enthusiasm for improving performance, code quality and developer experience.
Why join Zelt:
- Join a high-growth SaaS company backed by the investors of Notion, Spotify and Airbnb at exactly the right stage: proven product, strong momentum and still small enough that every engineer shapes the platform
- Work with an experienced, international team that ships fast and delivers features used every day
- Build and ship AI features in production, from model integration to scale and reliability
- See direct impact and visibility for your work rather than being one of hundreds in a large org
- Be part of a culture that values curiosity, technical excellence and continuous learning, with clear paths to take on bigger responsibilities
- Competitive compensation and benefits, including health insurance, with big technical challenges ahead.
Your work at Zelt will not disappear into the background, it will help define how modern companies run their people operations.
Fullstack Engineer (mid-level) in London employer: Zelt
Zelt is an exceptional employer for Fullstack Engineers, offering a unique opportunity to shape the future of people operations in a high-growth SaaS environment. With a strong focus on collaboration and continuous learning, employees are empowered to make impactful contributions while working alongside an experienced international team. The company fosters a culture of curiosity and technical excellence, providing clear paths for career advancement and competitive benefits, ensuring that your work is both meaningful and rewarding.
StudySmarter Expert Advice🤫
We think this is how you could land Fullstack Engineer (mid-level) 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 Zelt 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 Zelt.
✨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 Zelt.
✨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 Zelt 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 Fullstack Engineer (mid-level) 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 Zelt.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Zelt 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 Zelt
✨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 Zelt 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.
