---
title: 'Fullstack Software Engineer  - React, Kotlin & Ruby on Rails (x/f/m) at Doctolib'
canonical: 'https://feeny.ai/job/fullstack-software-engineer-react-kotlin-ruby-on-rails-x-f-m-doctolib-berlin-mqnmshbcs9pz'
type: 'job'
last_seen: '2026-09-11'
---

# Fullstack Software Engineer  - React, Kotlin & Ruby on Rails (x/f/m) at Doctolib

- **Company:** [Doctolib](https://feeny.ai/companies/doctolib)
- **Location:** Berlin, Germany
- **Employment:** contract
- **Work type:** hybrid
- **Posted:** 2026-08-14
- **Last confirmed live:** 2026-09-11
- **Apply:** https://jobs.ashbyhq.com/doctolib/f90590ae-1543-4c23-816c-230176e86eb6

## Job description

Join ACAI (Advanced Calendar Improvement), a team dedicated to making day-to-day practice operations more efficient and less mentally exhausting for healthcare professionals and their teams. Practice operations are often fragmented across post-its, emails, SMS, phone calls, oral instructions, and individual memory. This makes it difficult for teams to know what needs to be done, who owns it, how urgent it is, and what has already happened. As a Software Engineer, you will help build products that centralise work, improve coordination, and automate administrative tasks across the practice; directly contributing to a smoother experience for healthcare professionals, staff, and patients.

## Your responsibilities

- Develop reliable, intuitive features for Task Manager, Patient Flow Management, patient intake, appointment proposals, and telesecretaryship workflows
- Help practices coordinate the patient journey from arrival to completion of a visit, including waiting-room status, care steps, walk-ins, delays, patient movement, and check-out
- Design solutions that reduce the time healthcare professionals and staff spend manually creating, sorting, remembering, relaunching, and completing tasks
- Work across backend and frontend technologies to deliver high-quality, user-facing experiences
- Build performant, reliable, and observable services that can support Doctolib's growing user base and complex healthcare workflows
- Apply strong privacy, data protection, and security practices when working with personal and health-related information
- Partner closely with Product, Design, Data Protection, and other engineering teams to understand problems and deliver valuable solutions

## About our tech environment

Our solutions run on a single, fully cloud-native platform serving web and mobile applications across multiple languages and countries, each with its own regulatory and specialty-specific requirements. To address these challenges, we are modularising our platform through reusable components and a distributed architecture. On ACAI, you'll primarily work with Ruby and Kotlin on the backend and React with TypeScript and Rails on the frontend. Doctolib's broader technology environment also includes Java, Python and Swift. We leverage AI in an ethical manner across our products to empower patients and healthcare professionals. Discover our[AI vision](https://careers.doctolib.com/ai-careers/).

## Who you are

Before you read on, if you do not have the exact profile described below but feel this role matches your skills, we still encourage you to apply.

- You have 3+ years of experience as a full-stack Software Engineer, ideally working on user-facing products
- You have experience building scalable, robust, and reliable systems
- You are comfortable working with sensitive personal or health-related data, such as PHI and PII, and apply a strong privacy, data protection and security best practices by default
- You have experience collaborating closely with Product, Design, Security, and other engineering teams
- You have a user-first mindset and care about solving real problems for customers
- You use AI tooling thoughtfully as part of your engineering workflow
- You enjoy sharing knowledge, contributing to team discussions, and helping others grow
- You demonstrate a growth mindset and a strong learning agility
- You are fluent in English and comfortable working in a collaborative, discussion-oriented environment

Experience in healthcare, medical software, fintech, or another highly regulated domain would be a plus.

## What we offer

- A Deutschlandticket (Germany-wide public transport pass) fully paid for by Doctolib
- 28 vacation days + 1 additional day for each full calendar year of employment (up to a maximum of 30 days)
- Work from abroad for up to 10 days per year thanks to our flexibility days policy
- Company health insurance with great supplementary benefits through our partner Allianz
- Company pension scheme (bAV) through Allianz with an employer subsidy of 40% (15% within the probationary period)
- The Doctolib Parent Care program, which includes one month additional parental leave and much more
- Enrollment in Doctolib's long-term employee value sharing plan called DoctoGrowth
- Free mental health and coaching services through our partner Moka.care
- Subsidized sports membership through our partner Urban Sports Club
- A flexible workplace policy offering both hybrid and office-based mode
- Alongside healthy snacks and our regular breakfast buffet, we provide a subsidized meal benefit
- For caregivers and workers with disabilities, a package including an adaptation of the remote policy, extra days off for medical reasons, and psychological support
- Relocation support in case of international mobility
- Access to the best AI tools for coding, development and dedicated training

The interview process

- Coding Game
- Recruiter Interview
- Feature Building Interview
- System Design Interview
- Behavioral Interview
- Reference check

Job details

- Permanent position
- Full time
- Location: Berlin
- Working mode: Hybrid, with regular time in the Berlin office
- Start date: As soon as possible

We welcome everyone At Doctolib, we are committed to improving access to healthcare for everyone. This translates into our recruitment process. We evaluate candidates based solely on qualifications and motivation, without any form of discrimination. The more diverse ideas are heard, the more our product will truly improve healthcare for all. You are welcome to apply to Doctolib, regardless of your gender, religion, age, sexual orientation, ethnicity, or disability. To ensure equal opportunities, we invite you to exclude personal information (e.g., pictures, age) from your applications. If you require any accommodation, please let us know for support during the hiring process. Join us in building the healthcare we all dream of!

## Your data privacy

All information provided is processed by Doctolib for application management. For data processing details, click here: [Germany](https://doctolib.legal/B2C-Privacy-Policy-Career-DE) | [France](https://doctolib.legal/B2C-Privacy-Policy-Career-FR) | [Italy](https://doctolib.legal/B2C-Privacy-Policy-Career-IT) | [Netherlands](https://doctolib.legal/B2C-Privacy-Policy-Career-COM). Please contact hr.dataprivacy(at)doctolib.com for inquiries or to exercise your rights.

## About Doctolib

## Company Overview
- **One-liner**: Doctolib builds digital healthcare solutions for health professionals and patients, including appointment booking, telemedicine, EHR, and AI-powered clinical assistants.
- **Entity Type**: Private (Series E; $816M total funding)
- **Headquarters**: Levallois‑Perret, France
- **Founded**: 2013
- **Founders**: Not publicly listed (the company was founded by a team including Stanislas Niox‑Chateau, but the profile attributes it to a founding group; official sources do not emphasise individual founder names – likely Roman Schué, Stanislas Niox‑Chateau, and others)

## Core Business
- **Primary industry**: Healthcare Technology / Healthtech
- **Target customers**: B2B (healthcare professionals, hospitals, clinics) and B2C (patients); primary markets in France, Germany, Italy, and the Netherlands
- **Mission/purpose**: “Build together the healthcare we all dream of” – a purpose‑driven company (société à mission) with seven social objectives including improving care teams’ quality of life, facilitating access to care, and developing prevention.

## Products & Services
- **Appointment Booking & Calendar Management**: 24/7 online booking, waitlist, reminders, delays, and calendar optimisation. Used by 420,000+ health professionals and 90M+ patients.
- **Clinical & Financial Suite (EHR)**: Electronic health records, document management, secure messaging, prescribing, billing engine, and insurance processing. Includes “Doctolib Médecin” for GPs and “Doctolib Kiné” for physiotherapists.
- **AI Assistants**:  
  - *AI Consultation Assistant*: Real‑time structured transcription and documentation (supported 5M consultations).  
  - *AI Phone Assistant*: Handles booking and patient messaging 24/7.  
  - *AI Health Assistant* (in Health Companion): Answers health questions, provides coaching, and guides care journeys.
- **Health Companion**: Patient app for prevention campaigns, early detection, personalised guidance, video consultations, and care‑journey tracking.
- **Practice Efficiency & Patient Acquisition**: Tools for patient base management, recalls/notifications, practice analytics, CRM integrations, and marketing visibility.
- **Cooperative Care (Siilo)**: Secure messaging, case management, and referral platform enabling care coordination across professionals (merger with Siilo in 2023).
- **Financial Solutions**: Simplifies complex billing and insurance workflows for healthcare professionals.
- **Tailor‑made Service & Advisory**: Custom support and advisory for healthcare institutions.

## Market Standing
- **Valuation/Market Cap**: Not publicly disclosed (private company; total funding $816M)
- **Key Metric**: Annual Revenue ~€257.6M (most recent available). Total funding $816M (Series E of $170.3M led by General Atlantic in March 2019, with prior rounds from Accel, Eurazeo, Bpifrance, etc.)
- **Notable Investors/Partners**: General Atlantic, Accel, Eurazeo, Bpifrance, and others. Partners include public hospitals (AP‑HP) and the French government (vaccination campaign support).
- **Growth Signals**:  
  - 90M+ patients and 420,000+ health professionals across Europe.  
  - 2,900+ employees (up from 2,618 reported earlier).  
  - Tech & Product team of 900+ engineers.  
  - 15M online appointments booked per month in France alone, half outside office hours.  
  - B Corp certification (goal achieved by 2024).  
  - Expansion into Italy (2021) and Netherlands (via Siilo merger 2023).  
  - AI adoption: AI Consultation Assistant supporting 5M consultations.

## Competitive Advantages
- **Deep Healthcare Specialisation**: Over a decade of domain expertise; solutions meet highest clinical standards (ISO 27001, HDS certified).
- **Localised Approach**: Products adapted to each country’s regulations, languages, and specialties while maintaining a unified platform.
- **Ecosystem Lock‑in**: Integrated suite covering scheduling, EHR, billing, telemedicine, AI, and care coordination – creating a one‑stop shop for professionals.
- **Scale & Network Effects**: Large patient base (80–90M) drives adoption by professionals, which in turn attracts more patients.
- **AI‑First Innovation**: Research lab partnered with top tech and clinical institutions; deploying AI for documentation, decision support, and patient engagement.
- **Purpose & Trust**: Certified B Corp and French “société à mission” with annual independent audits, reinforcing trust with users and regulators.

## Strategic Focus
- **AI‐Powered Efficiency**: Scaling AI assistants to reduce administrative burden (targeting 4.5 hours saved per week per GP).  
- **International Expansion**: Deepening footprint in Germany, Italy, and the Netherlands while maintaining leadership in France.  
- **Real‑World Impact**: Focus on prevention, early detection, and continuous care (Health Companion).  
- **Platform Consolidation**: Integrating care cooperation (Siilo) and financial solutions to create a seamless end‑to‑end experience.  
- **Talent & Culture**: Growing tech team, investing in AI research, and reinforcing mission‑driven culture to attract top engineering and product talent.

## Why Work Here
- **Purpose & Mission**: B Corp certified, purpose‑driven company with a clear social impact (improving healthcare access and quality of life for care teams).  
- **Tech Scale & Challenge**: Build platform used by millions, work with 900+ tech peers on cloud‑native (AWS), mobile, AI, and security at scale.  
- **Learning & Development**: Doctolib Academy for onboarding; continuous training in AI tools, soft skills, and leadership; transparent internal mobility.  
- **Benefits**:  
  - Health insurance 100% paid for you and children.  
  - 25 vacation days + up to 14 RTT days/year.  
  - Parent Care Program: one additional month of leave beyond legal parental leave.  
  - Free mental health coaching via Moka.care.  
  - Gym (on‑site in Paris) with group classes.  
  - Flexible workplace: hybrid or office‑based; work from EU/UK up to 10 days/year.  
  - Subsidised sports/creative class membership.  
  - Lunch vouchers (Swile card).  
  - Solidarity Days (2 days/year for health charities).  
- **Work Environment**: Transparent internal mobility, support for new managers, diversity & inclusion initiatives, and a strong emphasis on collaboration with healthcare professionals.  
- **Locations**: Paris, Nantes, Berlin, Milan, Amsterdam, and other EU cities.

## Sources
1. [careers.doctolib.com](https://careers.doctolib.com/) – Careers page with benefits, culture, and product descriptions.
2. [linkedin.com/company/doctolib](https://www.linkedin.com/company/doctolib) – Company details, financials, workforce, and reviews.
3. [careers.doctolib.com/tech-doctolib/](https://careers.doctolib.com/tech-doctolib/) – Tech team overview, AI and product details.
4. [media.doctolib.com](https://media.doctolib.com/image/upload/mkg/file/impact_report_en_digital.pdf) – 2024 Impact Report with detailed mission, impact metrics, and business model.

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