Engineer - back End Developer

Engineer - back End Developer

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

  • Tasks: Build and iterate on backend services for an AI-driven SaaS platform.
  • Company: Join a dynamic, early-stage tech company in London.
  • Benefits: Enjoy competitive salary, equity options, and professional growth.
  • Other info: Work in an office-first culture with significant autonomy and career advancement.
  • Why this job: Make a real impact by developing cutting-edge infrastructure and systems.
  • Qualifications: Experience in backend development and strong problem-solving skills required.

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: Experience building complex systems at scale.
  • 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 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

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 brushing up on your algorithms and system design knowledge. Practice coding challenges and mock interviews to build confidence and demonstrate your problem-solving skills effectively.

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 are proactive about their job search!

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

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 and how your background makes you a great fit. Share specific examples of your work that demonstrate your ability to own systems end-to-end and 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 how you've driven work from conception to production.

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 the role. Plus, it shows us you’re keen on joining our team!

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 Ownership

Since the role involves owning systems end-to-end, be prepared to talk about how you've taken charge of projects in the past. Discuss how you’ve contributed to the technical direction and engineering standards in your previous roles. Highlight any instances where you’ve shipped significant features or products, as this will resonate well with the interviewers.

Collaborate Like a Pro

Collaboration is key in this role, so think of examples where you’ve worked closely with frontend engineers or product teams. Be ready to explain how you translated customer needs into technical solutions. This will demonstrate your ability to work in a fast-moving environment and your understanding of the bigger picture.

Be Ready for Technical Challenges

Expect some technical questions or challenges during the interview. Practice coding problems related to backend development, APIs, and databases. Familiarise yourself with modern backend languages and frameworks, and be prepared to discuss your approach to performance optimisation and reliability. This will show that you’re not just a coder but a thoughtful engineer.