Role highlights
Full Time
Permanent
Senior
On-site
The Senior Full Stack Engineer role requires approximately 5+ years of experience designing, building, and scaling web applications with a strong focus on both backend and frontend development. Core technical skills include advanced proficiency in Python, specifically with frameworks such as Django or FastAPI, to develop production-ready APIs and backend services that are fast, secure, and highly scalable. On the frontend, expertise in TypeScript and React is essential, along with modern frontend architectural patterns; experience with React Query is considered a plus. The role demands a deep understanding of distributed systems, asynchronous programming, and message queue technologies to support scalable data pipelines and predictive AI solutions. Robust testing practices, including maintaining production-grade codebases with strong reliability and maintainability, are critical, with familiarity in software design principles such as SOLID, and testing methodologies like TDD or BDD being advantageous. The position emphasizes technical leadership through mentoring junior developers, contributing to architectural decisions, and fostering a collaborative, Agile team environment. Strong communication skills and the ability to work cross-functionally are necessary to influence product direction and accelerate roadmaps. The candidate should have experience in code reviews and technical discussions, demonstrating the ability to produce cleaner, extensible codebases. This role offers the opportunity to work on innovative AI-driven marketing technologies within a diverse, inclusive culture focused on continuous improvement and personal growth. A bachelor’s degree underpins the educational background, supporting the senior level expertise required.
About the role
Senior Full Stack Engineer
Role Summary
- Join Neurons to build and scale predictive AI solutions for marketing
- Work on the API and Integrations team to enable seamless customer interactions with the Neurons platform
- Architect, build, and ship impactful products that deliver real-world results
Responsibilities
- Design and scale backend services and APIs for predictive insights (fast, secure, highly scalable)
- Build features end-to-end, from backend logic to frontend interfaces
- Ensure code reliability, maintainability, and robust testing
- Shape product direction through technical expertise and collaboration
- Mentor junior developers and foster a strong engineering culture
What Success Looks Like
- APIs and data pipelines scale smoothly to meet demand
- New features are shipped rapidly and integrate seamlessly
- Codebases become cleaner and easier to extend
- Engineering choices accelerate the product roadmap
- Technical leadership strengthens the team
Requirements
- ~5+ years of experience building and scaling web applications
- Proven expertise with Python (Django or FastAPI) and production-ready APIs
- Strong skills in TypeScript, React, and modern frontend architecture (React Query a plus)
- Experience with distributed systems, asynchronous programming, and message queues
- Robust testing strategies and maintaining production-grade codebases
- Strong communication skills and collaborative mindset; thrive in cross-functional, Agile teams
Nice to Have
- Experience with React Query
- Familiarity with SOLID, TDD, or BDD principles
- Experience contributing to product planning and architectural decisions (ADRs/RFCs)
- Leadership in technical discussions and code reviews
Benefits
- Work on technology merging AI, neuroscience, and marketing
- Tackle complex engineering challenges with a creative, collaborative team
- See your work impact major global brands
- Inclusive, diverse culture (85 talents from 30 nations)
- Focus on innovation, teamwork, and personal growth
- Results-driven with empathy and continuous feedback
- Health & well-being initiatives: yoga, healthy breaks, mental health resources
- Friday Hygge: karaoke, bingo, video games, board games
- In-house lunch
- Pension plan
- Private health insurance
- Parental leave benefits
- Quarterly company events
- Team events
Location
- Based at headquarters in the Greater Copenhagen Area (no fully remote option)
How to Apply
- Join Neurons to help redefine consumer neuroscience in an inclusive, innovative environment.
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- Location
- Taastrup
- Employees
- 51-200 employees
- Website
- neuronsinc.com