At a Glance
- Tasks: Own projects end-to-end, developing features for our AI-powered customer support platform.
- Company: Join Siena, a forward-thinking tech company focused on innovation and impact.
- Benefits: Enjoy competitive salary, health benefits, and opportunities for remote work.
- Other info: Dynamic team culture with a focus on professional growth and cutting-edge technology.
- Why this job: Make a real difference by powering millions of customer interactions globally.
- Qualifications: 5+ years in software development with Node.js, React, and cloud environments.
The predicted salary is between 60000 - 80000 € per year.
If you love solving real-world problems, thrive in fast-paced environments, and take pride in shipping great products, this role is for you.
- 5+ years building in Node.js, React, TypeScript, and Express
- Strong with PostgreSQL, Redis, and cloud environments (AWS: Fargate, Lambda, EC2, SQS)
- Familiar with CI/CD (CodePipeline, GitHub Actions, or similar)
- Experience integrating with LLMs in production
- Experience with microservices and scalable systems
- Product-driven—you care about the impact of what you ship, not just the code
- AI-first—you live in Cursor, Claude Code and are comfortable orchestrating coding agents
- Naturally curious and proactive; you don’t wait for instructions, you create momentum
- (Desirable) Next.js, Python, or event-driven architectures
- (Desirable) Infra-as-code (Terraform, CDK)
- (Desirable) Event-driven architecture experience
As a fullstack engineer at Siena, you’ll own projects end-to-end, developing and optimizing features within our AI-powered customer support automation platform. You’ll work closely with product, shaping our roadmap while building reliable, high-performance systems.
Your code will power millions of monthly customer interactions across global brands, where reliability and speed directly impact business outcomes.
- Design, build, and maintain scalable features across the full stack (frontend, backend, and infra)
- Collaborate with Product to break down scope into iterative, high-impact releases
- Integrate cutting‑edge LLM capabilities into real enterprise workflows
- Work on an AI‑first product, integrating cutting‑edge LLM capabilities into enterprise customer support workflows
- Solve complex engineering challenges, from optimizing API performance to refining microservices architecture
- Maintain and improve our cloud infrastructure (AWS) with a DevOps mindset
- Exercise high agency and ownership—taking initiative, making decisions, and driving ideas to production
Fullstack Software Engineer in London employer: Deepstreamtech
At Siena, we pride ourselves on fostering a dynamic and innovative work culture that empowers our Fullstack Software Engineers to take ownership of their projects and drive impactful solutions. With a strong focus on AI-driven technology, employees benefit from continuous learning opportunities, collaborative teamwork, and the chance to shape the future of customer support automation. Located in a vibrant tech hub, we offer competitive benefits and a supportive environment that values creativity and initiative, making us an excellent employer for those seeking meaningful and rewarding careers.
StudySmarter Expert Advice🤫
We think this is how you could land Fullstack Software Engineer in London
✨Tip Number 1
Network like a pro! Reach out to folks in your industry on LinkedIn or at meetups. We all know that sometimes it’s not just what you know, but who you know that can get you in the door.
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your projects, especially those using Node.js, React, and AWS. We want to see what you can do, so make it easy for us to find your best work.
✨Tip Number 3
Prepare for the interview by practising common technical questions and coding challenges. We love seeing candidates who can think on their feet and solve problems in real-time, so get ready to show us your thought process!
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, we’re always looking for passionate individuals who are eager to make an impact with their code.
We think you need these skills to ace Fullstack Software Engineer in London
Some tips for your application 🫡
Show Your Passion for Problem-Solving:When writing your application, let us know how much you love tackling real-world problems. Share specific examples of challenges you've faced and how you solved them, especially in fast-paced environments.
Highlight Your Technical Skills:Make sure to showcase your experience with Node.js, React, TypeScript, and Express. We want to see your expertise in PostgreSQL, Redis, and AWS too! Don’t forget to mention any CI/CD tools you’ve used.
Demonstrate Your Product-Driven Mindset:We care about the impact of what you ship, so explain how your work has made a difference in previous roles. Talk about your experience with AI-first products and how you’ve integrated LLMs into workflows.
Be Proactive and Curious:In your application, show us that you’re naturally curious and take initiative. Share instances where you’ve driven projects forward without waiting for instructions. We love candidates who create momentum!
How to prepare for a job interview at Deepstreamtech
✨Know Your Tech Stack Inside Out
Make sure you’re well-versed in Node.js, React, TypeScript, and Express. Brush up on your PostgreSQL and Redis knowledge too. Be ready to discuss how you've used these technologies in past projects and the impact they had.
✨Showcase Your Problem-Solving Skills
Prepare examples of real-world problems you've solved using your coding skills. Think about specific challenges you faced and how you approached them, especially in fast-paced environments. This will demonstrate your proactive nature and ability to create momentum.
✨Understand the Product and Its Impact
Familiarise yourself with Siena's AI-powered customer support automation platform. Be prepared to discuss how your contributions can enhance product performance and user experience. Show that you care about the impact of what you ship, not just the code itself.
✨Be Ready for Technical Challenges
Expect to tackle some technical questions or coding challenges during the interview. Practice common algorithms and system design questions, especially those related to microservices and scalable systems. This will help you demonstrate your engineering prowess.
