Engineer - back End Developer in London

Engineer - back End Developer in London

London Full-Time 60000 - 80000 € / year (est.) No home office possible
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At a Glance

  • Tasks: Build and optimise backend systems for an innovative AI-driven SaaS platform.
  • Company: Join a dynamic early-stage tech company in London with a focus on AI.
  • Benefits: Enjoy competitive salary, equity options, and a vibrant office culture.
  • Other info: Great opportunity for growth and autonomy in a fast-paced environment.
  • Why this job: Make a real impact by developing cutting-edge technology that powers our core product.
  • Qualifications: Experience in backend development and a passion for building scalable systems.

The predicted salary is between 60000 - 80000 € per year.

We're looking for a Backend Engineer to join an early-stage, revenue-generating AI-driven SaaS platform. Backend engineers who love owning systems end-to-end, want early-stage equity upside, and thrive in fast-moving environments.

Responsibilities include:

  • Scope, build, ship, and iterate on backend services and infrastructure that power our core product.
  • Build scalable infrastructure for AI agent systems, dialer infrastructure, and intelligent pipelines that handle thousands of concurrent operations.
  • Design and implement core backend systems including APIs, databases, event processing, and real-time data pipelines that support the product.
  • Collaborate with frontend engineers and product leadership to translate customer needs into technical architecture and implementation.
  • Own reliability and performance: Contribute to technical direction and engineering standards, helping shape how we approach problems and build systems.
  • Ship regularly and iterate: Build the dialer infrastructure, agent systems, intelligence pipelines, and data processing engines.

Requirements:

  • Strong technical foundation: You've built complex systems at scale - whether at a top-tier tech company, in a startup, or through ambitious projects.
  • Deep knowledge of data structures, algorithms, system design, and performance trade-offs.
  • AI/LLM experience (a plus): Experience building with AI agents, RAG systems, or LLM-powered features is valuable but not required.
  • Comfortable with modern backend languages and frameworks, plus exposure to databases and infrastructure tooling.
  • Professional software engineering experience: Strong backend and full-stack web development skills.
  • Computer science fundamentals: Solid grasp of data structures, algorithms, system design, and performance optimization.
  • TypeScript/JavaScript or equivalent: Production experience with modern backend languages and frameworks.
  • Database and infrastructure knowledge: Experience designing schemas, optimizing queries, and working with modern databases (SQL/NoSQL).

Office-first culture: Based in London, 5 days per week. Academic foundation in computer science or equivalent self-taught depth.

Opportunity to grow.

Engineer - back End Developer in London employer: Nelly Works

Join a dynamic and innovative team in our London office, where you'll have the opportunity to shape cutting-edge AI-driven solutions as a Backend Engineer. We foster an office-first culture that encourages collaboration and autonomy, providing you with the chance to work on impactful projects while enjoying early-stage equity upside. With a strong focus on employee growth and development, we empower our engineers to take ownership of their work and contribute to the technical direction of our products.

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Contact Detail:

Nelly Works Recruiting Team

StudySmarter Expert Advice🤫

We think this is how you could land Engineer - back End Developer in London

Tip Number 1

Network like a pro! Reach out to folks in the industry, attend meetups, and connect with potential colleagues on LinkedIn. You never know who might have the inside scoop on job openings or can refer you directly.

Tip Number 2

Show off your skills! Create a portfolio showcasing your projects, especially those that highlight your backend development expertise. Share it during interviews or even on your LinkedIn profile to catch the eye of recruiters.

Tip Number 3

Prepare for technical interviews by practising coding challenges and system design problems. Use platforms like LeetCode or HackerRank to sharpen your skills. Remember, demonstrating your problem-solving abilities is key!

Tip Number 4

Apply through our website! We love seeing candidates who are genuinely interested in joining us. Tailor your application to reflect your passion for building scalable systems and your experience with modern backend technologies.

We think you need these skills to ace Engineer - back End Developer in London

Backend Development
API Design
Database Management
Event Processing
Real-Time Data Pipelines
Scalable Infrastructure
Data Structures

Some tips for your application 🫡

Tailor Your CV:Make sure your CV reflects the skills and experiences that match the job description. Highlight your backend development experience, especially any projects where you've built scalable systems or worked with AI technologies.

Craft a Compelling Cover Letter:Use your cover letter to tell us why you're excited about this role at StudySmarter. Share specific examples of your past work that demonstrate your ability to own systems end-to-end and how you thrive in fast-paced environments.

Showcase Your Projects:If you've built something significant—be it a project, open-source tool, or business—make sure to include it in your application. We love seeing proof of your hands-on experience and what you've accomplished on your own.

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’re considered for this exciting opportunity to join our team in London!

How to prepare for a job interview at Nelly Works

Know Your Tech Inside Out

Make sure you brush up on your knowledge of data structures, algorithms, and system design. Be ready to discuss your past projects in detail, especially those that showcase your ability to build scalable systems. This is your chance to shine, so prepare examples that highlight your technical skills and problem-solving abilities.

Showcase Your Projects

Bring along examples of your work, whether it's a personal project, an open-source contribution, or something from a previous job. Be prepared to explain the challenges you faced and how you overcame them. This will demonstrate your hands-on experience and passion for backend development.

Understand the Company’s Product

Do your homework on the company and its AI-driven SaaS platform. Familiarise yourself with their core product and think about how your skills can contribute to their goals. This shows that you're genuinely interested and can help you tailor your answers to align with their needs.

Be Ready to Collaborate

Since this role involves working closely with frontend engineers and product leadership, be prepared to discuss how you approach collaboration. Share examples of how you've successfully worked in teams to translate customer needs into technical solutions. Highlight your communication skills and adaptability in fast-paced environments.