Senior Fullstack Engineer
First seen by Alion on Sep 10, 2026.
📍 This is an on-site position based in central Copenhagen.
Do you want your code to have an impact beyond the screen?
Join us in building the technology behind one of Denmark’s largest platforms for mental health. We are looking for a Senior Fullstack Engineer who enjoys solving meaningful problems, taking ownership and building reliable software that people depend on. You’ll have the freedom to shape how you solve problems, while working within a clear technical direction and taking responsibility for the quality and impact of what you build.
What you will join
A small, ambitious team building technology that makes mental health support more accessible. You’ll work closely with product and engineering, with room to shape solutions, take responsibility and grow with the company.
The Role
You’ll primarily work on our Django REST Framework backend and SvelteKit frontend, while also contributing to our AWS infrastructure, deployment pipeline and integrations with external services.
You will:
Design, build and maintain features across our Django REST Framework backend
Contribute to our SvelteKit frontend where needed
Improve and maintain our AWS infrastructure and deployment pipeline
Own features from initial idea and technical planning through to production
Integrate and maintain third-party services, including Stripe
Contribute to technical and product decisions
Ensure high standards for data security, privacy and the secure handling of sensitive data
Use AI tools where they make sense while critically evaluating their output
Help evolve our technical setup, architecture and development processes
Work closely with the CTO and the rest of the team
What We’re Looking For
4+ years of professional full-stack development experience
2+ years of professional experience with Python and Django REST Framework
Solid frontend development experience with SvelteKit, React or a similar framework
Proficiency with Git and GitHub workflows
A good understanding of data privacy, security and handling of sensitive data
Experience with AI-assisted development tools and the ability to critically evaluate their output
Comfortable working in a fast-paced startup environment with a high degree of ownership
Strong communication skills in both English and Danish
Able to work effectively with technical and non-technical colleagues
Based in or around Copenhagen
Nice to Have
AWS experience, e.g. Elastic Beanstalk, RDS and CloudWatch
Experience with payment systems such as Stripe
Experience from healthcare or other regulated industries
Experience with MedCom
Previous startup experience
What We Offer
Competitive salary (based on experience)
On-site, with one day per week working from home
Flexible working hours - we care about output, not when you sit at your desk
Laptop provided
High ownership and real influence on the product
The opportunity to help shape both the product and the technical setup
A mission-driven company working to make mental health support more accessible
If you’ve ever wanted to use your skills to make a meaningful difference, this might be the right time.
Interview Process
1. CV Review We’ll review your application and get back to you within one week.
2. Intro Call - 30 min An informal conversation to get to know each other and discuss your background and the role.
3. Technical Discussion - 60 min A deeper conversation about your technical experience and approach to problem-solving.
4. Reference Check We’ll speak with your references about your experience and working style.
5. Final Conversation Meet the team, align on expectations and discuss the next steps.
For more information or questions please contact us at [email protected]
Perks and benefits
This job comes with several perks and benefits
Flexible working hours
Flexible working hours
Near public transit
Near public transit
Free coffee / tea
Free coffee / tea
Social gatherings
Social gatherings
Skill development
Skill development
Mental health support
Mental health support
See all 12 benefits
Working at
Healper
See company profile
Healper a game-changing booking platform that matches people with mental health issues such as depression, anxiety, and addiction with the psychologist who fits their needs. Problem: The cumbersome booking of the wrong psychologist In Denmark, mental disorders account for 25% of the disease burden and cost society 55 billion DKK annually with more than 2,000 people receiving therapy from a psychologist every day. Further, too many individuals do not receive timely help as they cannot cope with the draining 5-hour process it takes to find and book a psychologist. At the same time, U.S. experience shows that only 20-40% of people find a psychologist they trust and have 'chemistry' with. This is tragic, as just one bad experience can cause a client to completely drop out of or postpone his/her therapy. The ineffective booking process and the risk of a poor patient-therapist match mean that many people continue to struggle with mental illness who could otherwise be treated. This has major consequences for individuals whose mental illness markedly impairs their quality of life, but also largely affect their family and friends. Furthermore, this is a major problem for society, which is negatively impacted by lost labor and growth and must shoulder the high costs associated with mental illness. Solution: A simple approach to booking the right psychologist Healper is a friendly guide and a booking platform that matches clients with psychologists. We have designed a comfortable, simple, and transparent user journey, that takes the client by the hand and helps him/her through therapy to mental health. Clients fill out a short questionnaire and are then matched with the best results from our database of more than 1,700 psychologists. Here, we find the psychologist who can statistically give the best treatment. Clients are presented with a prioritized list of three psychologists along with the reasons for the match. From this list, clients can choose which psychologist they like best, book a session, and pay. The platform continuously facilitates feedback from clients and their psychologists to improve the processing and precision of the matches.
Read more about Healper