---
title: 'Senior Software Engineer - Node.js/TypeScript (x/f/m) at Doctolib'
canonical: 'https://feeny.ai/job/senior-software-engineer-node-js-typescript-x-f-m-doctolib-berlin-wcjjmr42gmfd'
type: 'job'
last_seen: '2026-09-15'
---

# Senior Software Engineer - Node.js/TypeScript (x/f/m) at Doctolib

- **Company:** Doctolib
- **Location:** Berlin, Germany
- **Posted:** 2026-09-11
- **Last confirmed live:** 2026-09-15
- **Apply:** https://job-boards.greenhouse.io/doctolib/jobs/7990890003

## Job description

Set a new pulse for healthcare!

We are looking for a Senior Software Engineer to join the DIAL team in the Phone Assistant domain.

Your mission will be to design, build, and scale the AI-powered features that transform how practitioners and patients connect over the phone — making care more accessible for patients and reducing administrative burden for health professionals. You will work in a feature team developing the Phone Assistant, Doctolib's solution that combines LLM reasoning, speech recognition, and real-time backend systems, launching first in Germany and expanding to France and Italy.

Working in the tech team at Doctolib means building innovative products and features to improve the daily lives of care teams and patients.

## What you'll do

Your responsibilities include but are not limited to:

- Build and operate backend services in Node.js/TypeScript (with Python exposure), designing for reliability, scalability, and real-time performance
- Design, evaluate, and ship LLM-based features end-to-end: prompt engineering, tool calling, structured outputs, guardrails, and fallback strategies
- Own AI feature quality: build evaluation datasets and scorers (e.g., in Braintrust), track regressions, and make evidence-based ship decisions before each release
- Deploy and operate cloud-native services on Kubernetes across major cloud providers (AWS/Azure/GCP), and evolve CI/CD pipelines with GitHub Actions
- Design data models and drive database migrations and performance tuning for real-time workloads (PostgreSQL: connection pooling, indexing, query optimisation)
- Maintain a high testing bar (unit, integration, e2e), debug distributed systems in production with strong observability, and contribute to pragmatic, secure architecture decisions

## Who you are

Before you read on: if you don't have the exact profile described below, but you feel this job description matches your skill set, we still encourage you to apply.

You'll be a great fit if you:

- Have 5+ years of backend engineering experience building scalable, resilient systems in Node.js/TypeScript (with some Python)
- Have hands-on production experience building LLM-based features: prompting, tool calling, structured outputs, eval frameworks, and handling real-world failure modes
- Have proven experience deploying and operating services on Kubernetes within at least one major cloud provider (AWS, Azure, or GCP), with solid CI/CD practices
- Have a strong testing culture (unit/integration/e2e), sharp debugging skills for microservices and distributed systems, and a focus on code quality
- Are fluent in English, with a collaborative mindset and the drive to own problems end-to-end — from design to production

It would be fantastic if you:

- Have experience with speech pipelines (ASR, TTS, streaming audio) or voice agents
- Are familiar with event-driven architectures and message brokers (Kafka, RabbitMQ, NATS, or Redis Streams), and have hands-on PostgreSQL experience (EXPLAIN/ANALYZE, indexing strategies, connection pooling)
- Have an interest in telephony and real-time communication (SIP, RTP, WebRTC) — no prior experience needed, we will teach you

Life at Doctolib Tech

- Our solutions are built on a single fully cloud-native platform that supports web and mobile app interfaces, multiple languages, and is adapted to country and healthcare specialty requirements.
- Our stack is composed of Rails, TypeScript, Java, Python, Kotlin, Swift, and React Native.
- We leverage AI ethically across our products to empower patients and health professionals. Discover our AI vision[here](https://careers.doctolib.com/ai-careers/).

Want to learn more about our tech culture and environment? Visit the[Doctolib Tech site](https://careers.doctolib.com/tech-doctolib/).

## 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

Our interview process

- Recruiter Interview
- Live Coding Interview
- System Design Interview
- Behavioral Interview
- At least one reference check

We want your experience to be clear, respectful, and transparent. Learn more about our hiring process on our[candidate experience page](https://careers.doctolib.com/tech-doctolib/getting-hired/).

Job details

- Permanent position
- Tech stack: Node.js/TypeScript, Python, Kubernetes, AWS/Azure/GCP, PostgreSQL
- Full-time
- Berlin
- Hybrid work setup (up to 2 remote days per week)
- 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

## Core Business
- **Primary industry**: Healthcare information technology (healthtech) / Software Development
- **Target customers**: B2B (healthcare professionals across 120+ specialties) and B2C (patients managing their health journey)
- **Mission or purpose statement**: “Build together the healthcare we all dream of” – making healthcare more human, sustainable, and accessible. The company is a certified B Corp and mission-driven.

## Products & Services
- **Appointment Booking** – 24/7 online scheduling, waitlist management, calendar optimization, reminders and delay notifications.
- **Practice Efficiency (Digital Secretariat)** – Tools for patient base management, task manager, openings/absences, recall campaigns, and analytics.
- **Clinical & Care Cooperation** – Electronic health records (EHR), document management, secure messaging, prescribing, billing engine, and AI assistants for documentation and decision support.
- **Health Companion (Patient App)** – A mobile app offering prevention campaigns, early detection programs, personalized guidance via an AI assistant, video consultations, and messaging with professionals.
- **AI Consultation Assistant** – Structured transcription of consultations; has supported 5 million consultations.
- **AI Phone Assistant** – Virtual assistant handling bookings and messages 24/7.
- **Financial Solutions** – Simplifies billing and insurance processes for healthcare professionals.
- **Platform & APIs** – Internal platform for modular development; data import/export, CRM integrations, and partner programs.

## Market Standing
- **Valuation/Market Cap**: Not disclosed (private company)
- **Key Metric**: Annual Revenue EUR 257.6M (latest available); Total Funding USD 816M across 10 rounds
- **Notable Investors/Partners**: General Atlantic (lead in Series E), Eurazeo (Series D lead), Accel (Series B lead), and others. Acquired Dott.it, Tanker, and Appocrate.
- **Growth Signals**: 
  - 90 million patients and 420,000 healthcare professionals use the platform.
  - 2,900+ employees (up from ~2,618 as per LinkedIn; monthly headcount growth +1.0%).
  - Operating in France, Germany, Italy, Netherlands, with presence in Switzerland and UK.
  - Tech team of 900+ experts; AI features deployed in production (e.g., AI Consultation Assistant used in 5M consultations).

## Competitive Advantages
- **Network effects**: Large, two-sided marketplace connecting millions of patients with hundreds of thousands of professionals across Europe.
- **Deep healthcare expertise**: Over a decade of experience, solutions adapted to 120+ specialties and local regulations.
- **AI-first innovation**: Proprietary datasets, research lab, and production AI assistants that improve clinical efficiency.
- **Trust and compliance**: Certified B Corp, ISO 27001, HDS (health data hosting) – high security and privacy standards.
- **Platform modularity**: Cloud-native, distributed architecture that allows rapid adaptation to new countries and specialties.

## Strategic Focus
- **AI integration**: Scaling AI Consultation Assistant, AI Phone Assistant, and AI-powered clinical decision support.
- **Preventive and continuous care**: Shifting from reactive treatment to proactive health management via the Health Companion app.
- **Geographic expansion**: Deepening presence in existing European markets and entering new regions.
- **Platform modularization**: Building reusable components to accelerate product development and partner integrations.
- **Mission-driven growth**: Maintaining B Corp status while expanding revenue and impact.

## Why Work Here
- **Culture**: Mission-driven, B Corp certified, collaborative environment focused on social impact. Employees report a strong sense of purpose.
- **Work policy**: Flexible – hybrid and office-based modes available. Option to work from EU countries and the UK for up to 10 days per year.
- **Benefits**:
  - Health insurance 100% paid for employee and children.
  - 25 paid vacation days + up to 14 RTT days annually.
  - Free mental health and coaching services (Moka.care).
  - On-site gym with group classes (Paris office).
  - One additional month of parental leave on top of legal leave (Parent Care Program).
  - Lunch vouchers (Swile card), sports/club subsidy.
  - Solidarity Days (2 days/year for health charities).
- **Engineering culture**: 900+ tech team, dedicated onboarding (Doctolib Academy), continuous training, access to best AI tools, and internal mobility opportunities.
- **Employer rating**: 3.6/5 on LinkedIn (923 reviews) – work-life balance 3.7, culture 3.7, compensation 3.3.

## Sources
1. [careers.doctolib.com](https://careers.doctolib.com/)
2. [careers.doctolib.com/tech-doctolib](https://careers.doctolib.com/tech-doctolib/)
3. [linkedin.com/company/doctolib](https://www.linkedin.com/company/doctolib)
4. [jobsbyculture.com/companies/doctolib](https://jobsbyculture.com/companies/doctolib)
5. [welcometothejungle.com/en/companies/doctolib](https://www.welcometothejungle.com/en/companies/doctolib)

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