Backend Developer (HealthTech)
Software Engineering
Barcelona, Spain
Who are we?
MiMIAT Health is a patient-owned unified longitudinal record that enables data continuity and makes disease evolution visible across fragmented care settings for multidisciplinary teams managing hard-to-diagnose diseases.
Our first live module focuses on gastrointestinal health, and we are already working across healthcare and institutional environments, with recognition from AstraZeneca ACCIÓN, PRECISEU Best Practice Recognition in the Excellence category, Google for Startups for Sustainable Development, NVIDIA Inception, and ESADE eWorks.
Our mission? To give patients back control, reduce delays in care, and make chronic disease management more dignified, inclusive, and data-driven.
What are we looking for?
We’re looking for a Backend Developer to help us maintain, improve, and scale the backend infrastructure behind MiMIAT’s patient mobile app and clinician web platform.
This is currently an initial unpaid pro-bono/volunteer collaboration, with an expected contribution of approximately 18-20 hours per week, managed flexibly around the contributor’s other commitments and coordinated with the team’s priorities.
The opportunity is particularly suited to someone who wants to contribute to a meaningful social-impact HealthTech project; strengthen their CV through hands-on experience with a real product already deployed in the market; gain practical exposure to digital health, patient-generated health data, and healthcare workflows; or complement their current professional or academic work with a hands-on role in an early-stage European startup.
We value consistency over intensity. You do not need to be available full-time, but we do need reliable contribution, realistic availability, and clear communication around progress, blockers, and changing circumstances.
What you’ll do
- Maintain and improve the backend services powering MiMIAT’s patient mobile app and clinician web platform.
- Develop and maintain backend features using TypeScript/JavaScript, Node.js, and Express.js.
- Build and refine REST APIs connected to authentication, patient-clinician workflows, consent-based access, notifications, longitudinal health data, clinical records, and other core product logic.
- Manage NoSQL databases, especially MongoDB with Mongoose.
- Deploy, maintain, and improve backend infrastructure using AWS, Docker, and related cloud technologies.
- Work directly with authentication and authorization flows using JWT, protected routes, user roles, and permission structures.
- Review and improve infrastructure reliability, deployment workflows, environment configuration, access management, and technical maintainability.
- Use Bruno, Postman, or similar tools to test backend endpoints and support frontend/backend integration.
- Collaborate closely with the mobile, frontend, QA, and product teams to identify issues, validate fixes, and support stable product releases.
- Help document backend logic, APIs, infrastructure context, deployment processes, and technical decisions so that MiMIAT avoids single-person dependency and becomes easier to maintain and scale.
Who are you?
- You have around 2+ years of hands-on backend experience with TypeScript/JavaScript, Node.js, Express.js, and REST API development.
- You have practical experience with MongoDB and Mongoose, or strong database experience with the ability to adapt quickly to a MongoDB-based backend.
- You have hands-on experience deploying and maintaining backend services on AWS. For this role, AWS experience is important, not merely a nice-to-have.
- You understand cloud infrastructure, environments, deployment workflows, access management, and the operational responsibilities behind maintaining a live backend.
- You have worked with authentication and authorization flows, ideally including JWT, protected routes, and role-based access logic.
- You understand how backend systems connect with mobile apps, web platforms, notifications, emails, file uploads, and real user workflows.
- You are comfortable testing APIs with Bruno, Postman, or similar tools.
- You can share concrete examples of backend systems, APIs, cloud infrastructure, or production products that you have personally built, maintained, or significantly contributed to.
- You have realistically assessed your current professional, academic, and personal commitments and can sustain approximately 18-20 hours per week over the coming months.
- You understand that clear and proactive communication is essential in a fully remote and international team working across different time zones.
- You are comfortable joining an early-stage product where ownership, documentation, pragmatic decisions, and consistency matter.
- You are consciously looking for a pro-bono / volunteer opportunity where you can create social impact, strengthen your CV, gain real product experience, or complement your current professional or academic work with a hands-on early-stage HealthTech role.
- Bonus points if you have experience with: Digital health, patient-facing products, sensitive data environments, GDPR, Docker, Firebase, SendGrid, CI/CD, automated testing, clinician-facing platforms, or other regulated environments.
- Additional plus if you can support React Native/Expo workflows, including EAS builds, OTA updates, release channels, or app release processes.
What do we offer?
- This is currently an initial unpaid pro-bono / volunteer collaboration, designed for someone who wants to contribute meaningfully to a real HealthTech product while gaining hands-on experience and strengthening their profile in digital health, startups, and product development.
- You’ll work directly on live patient and clinician-facing products already deployed in the market.
- You’ll gain hands-on exposure to backend development in digital health, chronic care, patient-generated health data, clinician workflows, consent-based data sharing, and real-world deployment.
- You’ll work closely with the founder and international technical team during MiMIAT’s next stage of product growth.
- You’ll contribute to a platform expanding across new clinical modules, languages, and healthcare environments.
- You’ll be part of a global, multidisciplinary team spanning engineering, UX/UI, QA, clinical, regulatory, compliance, and business development.
- You’ll contribute to a mission focused on making chronic care more connected, dignified, inclusive, and patient-centred.
- You’ll join a social-impact HealthTech startup recognized and supported through AstraZeneca ACCIÓN, PRECISEU Best Practice Recognition, Google for Startups for Sustainable Development, NVIDIA Inception, and ESADE eWorks, while opening pathways with public health institutions, hospitals, academia, and other healthcare stakeholders.
- Any future paid or formal collaboration, if ever considered, would depend entirely on MiMIAT’s evolution, mutual fit, available resources, and a separate written agreement. No future paid opportunity is guaranteed or implied by this volunteer collaboration.
How to apply
Send your CV, GitHub, portfolio, personal site, or concrete examples of backend, API, or cloud products you have personally built or significantly contributed to at info@mimiathealth.com, or reach out directly here on LinkedIn.
Please also be ready to explain your current professional or academic commitments and the level of contribution you can realistically sustain over the coming months.
If you’re looking to create real social impact, strengthen your CV through meaningful HealthTech experience, or complement your current work with a hands-on role in an early-stage European startup, we’d love to hear from you!





