At a Glance
- Tasks: Design and implement backend services for our cutting-edge AI platform.
- Company: Join a fast-growing tech company in the heart of London.
- Benefits: Competitive salary, quarterly bonuses, and opportunities for professional growth.
- Other info: Collaborate with a mission-driven team and shape the future of technology.
- Why this job: Make a real impact in AI while enjoying high ownership and autonomy.
- Qualifications: 5+ years in software engineering with strong Python and backend development skills.
The predicted salary is between 80000 - 120000 € per year.
We are seeking a talented Senior Backend Engineer to join our London-based team full-time. You will play a key role in building and scaling the core infrastructure of our AI platform, owning critical backend systems, and supporting rapid product growth. This is a high-impact, fast-paced role with significant autonomy, where your work will directly influence product direction and user experience.
Key Responsibilities
- Design and implement backend services and APIs using Python, FastAPI, and Django
- Build and maintain scalable RESTful APIs with PostgreSQL
- Develop and integrate AI/LLM-powered features using frameworks such as LangChain
- Implement and manage payment systems, including Stripe integrations and subscription flows
- Build image processing and computer vision pipelines
- Write clean, maintainable, and well-documented code deployed via Docker and CI/CD pipelines
- Collaborate using GitHub, maintaining high code quality and team standards
- Work with BaaS platforms (e.g., Supabase) for authentication, storage, and real-time functionality
- Ensure performance, scalability, and security best practices
- Collaborate cross-functionally with Product, Design, and Frontend teams
- Contribute to architectural decisions and mentor other engineers
- Develop data-driven backend services and pipelines
- Support production systems and deployments within a small, high-performing team
Qualifications
- 5+ years of professional software engineering experience
- Strong Python expertise with backend development experience
- Proven experience with FastAPI and/or Django, REST APIs, and PostgreSQL
- Experience integrating Stripe for payments and subscriptions
- Familiarity with image processing and computer vision
- Experience with Docker, GitHub, and modern deployment workflows
- Knowledge of cloud platforms (AWS, GCP, or Azure)
- Strong understanding of software design principles (SOLID, patterns, clean code)
- Experience with BaaS platforms such as Supabase or Firebase
- Ability to thrive in fast-paced, high-ownership environments
Nice to Have
- Experience with LLM APIs (e.g., OpenAI, Anthropic, Gemini) and LangChain
- Background in AI/ML (e.g., generative models, GANs, diffusion, regression)
- Experience building data pipelines and data-driven systems
- Familiarity with workflow orchestration tools (e.g., Temporal, Prefect)
Why Join
- Be part of a fast-growing company in the AI and consumer tech space
- High ownership and autonomy over technical decisions
- Work closely with founders and a mission-driven team
- Strong market traction and growth potential
- Opportunity to shape a rapidly evolving industry
Back End Developer (Senior) employer: W Talent
Join a dynamic and innovative team in London as a Senior Back End Developer, where you'll enjoy a culture of high ownership and autonomy, allowing you to make impactful technical decisions. With competitive salaries, quarterly bonuses, and opportunities for professional growth, this role offers a unique chance to shape the future of AI technology while collaborating closely with passionate founders and a mission-driven team.
StudySmarter Expert Advice🤫
We think this is how you could land Back End Developer (Senior)
✨Tip Number 1
Network like a pro! Reach out to your connections in the tech industry, attend meetups, and join online communities. 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 involving Python, FastAPI, and Django. This will give potential employers a taste of what you can do and set you apart from the crowd.
✨Tip Number 3
Prepare for technical interviews by brushing up on your coding skills and system design principles. Practice common backend development problems and be ready to discuss your past experiences with APIs and database management.
✨Tip Number 4
Don’t forget to apply through our website! We love seeing candidates who are genuinely interested in joining our team. Tailor your application to highlight your experience with AI/ML and backend systems to catch our eye.
We think you need these skills to ace Back End Developer (Senior)
Some tips for your application 🫡
Tailor Your CV:Make sure your CV is tailored to the role of Senior Backend Developer. Highlight your experience with Python, FastAPI, and Django, and don’t forget to mention any relevant projects that showcase your skills in building scalable APIs and integrating payment systems.
Craft a Compelling Cover Letter:Your cover letter is your chance to shine! Use it to explain why you’re passionate about backend development and how your experience aligns with our mission at StudySmarter. Be sure to mention any specific projects or achievements that demonstrate your expertise.
Showcase Your Projects:If you’ve worked on any interesting projects, especially those involving AI or image processing, make sure to include them in your application. We love seeing real-world applications of your skills, so don’t hold back!
Apply Through Our Website:We encourage you to apply through our website for the best chance of getting noticed. It’s super easy, and you’ll be able to submit all your materials in one go. Plus, we love seeing candidates who take the initiative to apply directly!
How to prepare for a job interview at W Talent
✨Know Your Tech Stack
Make sure you’re well-versed in Python, FastAPI, and Django. Brush up on your knowledge of RESTful APIs and PostgreSQL, as these will be crucial in the interview. Be ready to discuss your past projects and how you've implemented these technologies.
✨Showcase Your Problem-Solving Skills
Prepare to tackle some technical challenges during the interview. Think about how you would approach building scalable systems or integrating payment solutions like Stripe. Practising coding problems can help you articulate your thought process clearly.
✨Demonstrate Collaboration
This role involves working closely with cross-functional teams. Be prepared to share examples of how you’ve collaborated with product managers, designers, and frontend developers in the past. Highlight your experience mentoring others and contributing to team standards.
✨Ask Insightful Questions
Interviews are a two-way street! Prepare thoughtful questions about the company’s tech stack, their approach to AI/ML, and how they envision the future of their products. This shows your genuine interest and helps you assess if it’s the right fit for you.
