Senior Fullstack Engineer

Senior Fullstack Engineer

London Full-Time 43200 - 72000 £ / year (est.) No home office possible
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At a Glance

  • Tasks: Own features from concept to launch, shaping product development.
  • Company: Join Zelt, a leader in modern organisational management solutions.
  • Benefits: Enjoy competitive pay, health insurance, equity, and travel perks.
  • Why this job: Work on innovative tech challenges with a culture of learning and impact.
  • Qualifications: Experience in fullstack development with JavaScript, Node.js, React, and AWS.
  • Other info: Be part of a team that values your input and fosters collaboration.

The predicted salary is between 43200 - 72000 £ per year.

About Us

Zelt is on a mission to rebuild how organisations run. Our all-in-one platform helps modern companies manage their people 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.

About the Role

As a Senior Fullstack Engineer you will have the opportunity to take features from idea through design to shipped product. You will work in a lean, product-focused team where your input helps shape both what we build and how we deliver it.

Key Responsibilities

  • Take end-to-end ownership of features including architecture, testing, shipping and iteration
  • Design, build and maintain scalable applications across the stack (Node.js, TypeScript, React, AWS, PostgreSQL)
  • Collaborate closely with product and design to align technical execution with user needs
  • Write clean, maintainable and well tested code and champion engineering best practices
  • Improve developer workflows, tooling and processes to keep the team fast and productive
  • Stay on top of new technologies and suggest pragmatic, high impact improvements.

About You

  • Strong experience delivering fullstack applications in fast-moving product environments
  • Deep expertise in JavaScript/TypeScript, Node.js, React, AWS, PostgreSQL
  • Strong problem-solving ability and attention to code quality and architectural integrity
  • Clear communicator who thrives in collaborative environments
  • Sense of ownership and pride in your work, motivated by outcomes rather than tasks.

️ Perks & Benefits

  • Work on technically ambitious challenges that will stretch your skills
  • Direct ownership and impact, with your work visible and influential from day one
  • A culture that values technical excellence and continuous learning
  • Competitive compensation with benefits including health insurance, equity and even airline miles
  • The chance to join early enough to shape the product, but with product-market fit and momentum already in place.

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Senior Fullstack Engineer employer: Randstad (Schweiz) AG

Zelt is an exceptional employer for Senior Fullstack Engineers, offering a dynamic work culture that prioritises technical excellence and continuous learning. With competitive compensation and benefits, including health insurance and equity, employees have the opportunity to make a significant impact from day one while working on ambitious projects in a collaborative environment. Located in a forward-thinking industry, Zelt empowers its team members to shape innovative solutions that redefine how organisations operate.
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Contact Detail:

Randstad (Schweiz) AG Recruiting Team

StudySmarter Expert Advice 🤫

We think this is how you could land Senior Fullstack Engineer

Tip Number 1

Familiarise yourself with Zelt's platform and its unique features. Understanding how their all-in-one solution works will help you demonstrate your enthusiasm and insight during discussions.

Tip Number 2

Showcase your experience with the specific technologies mentioned in the job description, such as Node.js, TypeScript, and React. Be prepared to discuss past projects where you've successfully implemented these technologies.

Tip Number 3

Highlight your problem-solving skills by preparing examples of challenges you've faced in previous roles. Discuss how you approached these issues and the impact of your solutions on the project or team.

Tip Number 4

Emphasise your collaborative nature by sharing experiences where you've worked closely with product and design teams. This will show that you can align technical execution with user needs, which is crucial for this role.

We think you need these skills to ace Senior Fullstack Engineer

Fullstack Development
JavaScript
TypeScript
Node.js
React
AWS
PostgreSQL
Software Architecture
Testing and Quality Assurance
Agile Methodologies
Collaboration and Teamwork
Problem-Solving Skills
Code Maintainability
Technical Communication
Continuous Learning

Some tips for your application 🫡

Understand the Company: Before applying, take some time to understand Zelt's mission and values. Familiarise yourself with their all-in-one platform and how it revolutionises organisational management. This knowledge will help you tailor your application.

Highlight Relevant Experience: In your CV and cover letter, emphasise your experience with fullstack applications, particularly with technologies like JavaScript, TypeScript, Node.js, React, AWS, and PostgreSQL. Provide specific examples of projects where you've taken ownership from design to delivery.

Showcase Problem-Solving Skills: Zelt values strong problem-solving abilities. In your application, include instances where you've tackled complex challenges in a collaborative environment. This will demonstrate your fit for their team-oriented culture.

Craft a Compelling Cover Letter: Use your cover letter to express your passion for technical excellence and continuous learning. Discuss how your skills align with Zelt's goals and how you can contribute to their mission of improving organisational efficiency.

How to prepare for a job interview at Randstad (Schweiz) AG

Showcase Your Fullstack Experience

Be prepared to discuss your previous projects in detail, especially those involving Node.js, TypeScript, React, AWS, and PostgreSQL. Highlight specific challenges you faced and how you overcame them, as this will demonstrate your problem-solving skills and technical expertise.

Emphasise Collaboration Skills

Since the role involves working closely with product and design teams, be ready to share examples of how you've successfully collaborated in the past. Discuss how you align technical execution with user needs and how you communicate effectively within a team.

Demonstrate Ownership and Pride in Your Work

Talk about instances where you took end-to-end ownership of a feature or project. Explain how you ensured quality through testing and iteration, and express your motivation for delivering impactful results rather than just completing tasks.

Stay Updated on New Technologies

Show your enthusiasm for continuous learning by discussing recent technologies or trends you've explored. Suggest pragmatic improvements based on your knowledge, which will reflect your proactive approach and commitment to keeping the team productive.

Senior Fullstack Engineer
Randstad (Schweiz) AG
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