Job Description
About Us
Equity research runs on powerful but siloed Excel workflows — making it difficult to connect with modern tools and AI. Stellar Fusion is building the infrastructure that unlocks the full potential of the sell-side workflow, where the success of AI depends on structured, high-quality data at its core.
Founded by top-ranked equity research analysts, we design our product with a deep understanding of how the sell-side works.
Already working with leading research firms, we're moving fast to solve real problems with real impact.
About the Role
We are looking for a skilled Software Engineer to join our growing engineering team. In this role, you will take ownership of building, maintaining, and improving our backend services and APIs, as well as contributing to frontend systems. You will work closely with cross-functional teams to ship high-quality features, improve system reliability, and shape the architecture of our products.
This position offers a unique opportunity to work on diverse technical challenges while making a real impact.
Location: London, UK
Job Type: Full-time (on site)
Level: Mid/Senior
Team: Engineering
Start: Immediate
Salary Expectation: up to 60K
Note: We are unable to sponsor a work visa for this role. You must have existing UK work authorization.
Key Responsibilities
* Design, develop, and maintain backend services and APIs using TypeScript/JavaScript (Node.js)
* Build and query data models using MongoDB and Redis
* Develop, containerize, and deploy applications using Docker
* Collaborate with product, design, and engineering teams to deliver new features
* Write clean, maintainable, and well-documented code
* Implement and maintain unit and integration tests
* Participate in code reviews, architecture discussions, and technical planning
* Contribute to CI/CD pipeline improvements and automation
* Monitor, debug, and optimize applications in cloud environments (e.g., AWS)
Required Skills & Experience
* 3–5+ years of professional software engineering experience
* Strong experience with TypeScript and JavaScript (Node.js)
* Proficiency in Docker and containerized development workflows
* Solid understanding of Git and version control best practices
* Experience working with NoSQL databases, especially MongoDB and Redis
* Familiarity with AWS services like EC2, Lambda, S3, and CloudWatch
* Comfortable designing and working with RESTful APIs
* Hands-on experience with testing frameworks such as Jest, Mocha, or similar
* Understanding of CI/CD pipelines and modern DevOps practices
* Strong problem-solving and debugging abilities
* Excellent communication and teamwork skills
* A proactive, ownership-driven mindset and willingness to tackle novel problems
Nice to Have
* Experience with frontend frameworks like React
* Familiarity with Kubernetes or other orchestration systems
* Background working with high-scale systems or event-driven architecture
* Exposure to agile development methodologies
Why Join Us?
We offer a collaborative and intellectually stimulating environment where engineers are empowered to take ownership and make meaningful contributions. If you are passionate about building high-quality software and want to work with a motivated, talented team, we’d love to hear from you.