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Backend Engineer

Backend Engineer

Senior Back-end engineer

Nabla

Parissenior

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Role description

About Nabla
We are a team of entrepreneurs, clinicians and engineers committed to bringing back joy to the practice of medicine.

Together with a community of clinician innovators, we’ve harnessed the best of machine learning science to develop Nabla: the leading AI assistant that’s restoring the human connection at the heart of healthcare. By streamlining clinical documentation, Nabla is helping clinicians focus on what matters most - patient care. Today, over 100,000+ clinicians across 130+ healthcare organizations trust Nabla to support how they deliver care every day.

We’re at the start of an ambitious journey: Ambient listening, dictation, coding, and command capabilities are all converging into a proactive assistant that intuitively streamlines clinical and financial workflows.

Backed by a recent $70M Series C, we’re hiring to build the next generation of clinical AI and improve the lives of clinicians and patients everywhere.

This is a great time to join us!

The best of AI at the service of healthcare
Nabla’s phenomenal traction is the result of 3 years of diligent product development.

Led by former Meta AI Research engineers, our team has consistently anticipated how AI can revolutionize healthcare delivery. Our Machine Learning team continually leverages the latest advancements to unlock AI’s full potential in healthcare.

Yann LeCun, Meta’s Chief AI Scientist and Turing award winner, is an advisor to Nabla.

Engineering at Nabla
Engineering at Nabla is lean, fast-moving, and deeply technical. Our teams span machine learning, native desktop applications, and platform infrastructure to deliver AI into clinical settings reliably and at scale.

Your Team
At Nabla, product development is led jointly by Engineering and Product, and organized into cross-functional squads, each focused on a specific product area. Squads bring together product managers, designers, engineers of different profiles, and domain experts, and operate with a high level of ownership.

As a Senior Back-end Engineer, you’ll join one of these squads and contribute end to end to a specific part of the product.

What You'll Do
As a Senior Back-End Engineer, you will play a critical role in scaling Nabla’s AI-driven healthcare platform. You will take ownership of key components of our back-end systems, collaborate closely with product and machine learning teams, and help shape the technical direction of our infrastructure.

You Will

  • Design, build, and evolve our server-side applications and APIs
  • Lead complex integrations with external partners, especially Electronic Health Record (EHR) systems
  • Continuously improve and optimize our back-end architecture and developer experience
  • Guide architectural discussions and influence long-term technical decisions
  • Collaborate closely with Machine Learning, Product, and Front-End teams to deliver impactful end-to-end features
  • Mentor junior engineers and contribute to scaling the engineering culture

To Give You a Sense Of The Impact

  • Nabla processes 10 billion tokens/month with LLMs
  • Every week, hundreds of thousands of clinical notes are automatically generated and synced with EHRs, saving thousands of hours for clinicians
  • Our APIs serve real-time workloads in high-stakes clinical environments

Your DNA

  • You have strong foundations in computer science or a related discipline
  • You demonstrate strong, senior-level experience in back-end engineering, ideally within fast-paced, production-critical environments.
  • You’re proficient in one or more widely used back-end languages (Java, Kotlin, C++, Python, etc.)
  • You have deep experience designing, building, and maintaining scalable APIs and distributed systems (GraphQL and OpenAPI experience is a plus)
  • You are comfortable driving architectural decisions and technical strategy
  • You write clean, maintainable code and have high standards for software quality
  • You communicate clearly in English
  • Bonus: experience with cloud infrastructure, security/compliance, or healthcare data standards (FHIR)

Our stack

  • Frontend: TypeScript, React, Tailwind CSS, Swift, Rust, Electron.
  • Backend: Kotlin / JVM, GraphQL, PostgreSQL.
  • ML & Infra: Python, PyTorch, Slurm, GCP, Terraform, Kubernetes.

Where you'll be based
Our offices are based in Paris 3e (Arts & Métiers).

Remote policy: 2 days remote a week

Benefits
Just like we’re dedicated to supporting doctors’ well-being, ensuring yours is a top priority. We firmly believe that by prioritizing your well-being, we support you to excel in your work.

Here Are The Benefits You Get When Joining Nabla

  • Stock ownership
  • 100% healthcare coverage
  • Meal vouchers
  • Public transportation costs covered at 50%
  • Exercise class during the workday: Yoga, running, pilates, HIIT
  • Unlimited budget for book purchases, so you can continue to learn about ML / Healthcare
  • Culture of trust & accountability — your output matters more than your clock-in time

Life at Nabla
When you become a part of our company, you join a team of excellence-driven, curious, and genuinely kind individuals. Together, we're committed to making clinicians' lives easier and improving healthcare experiences for everyone. We believe in a world where clinicians can focus on what they were trained to do - caring for their patients, and where no patient feels their visit was rushed.

We come to work excited to leverage AI to do more for clinicians. We’re obsessed with our users’ satisfaction and we actively seek out opportunities to engage one-on-one with clinicians to understand how Nabla can better help. We consistently look for ways to improve and do not shy away from doing the work to excel. Whether it’s a feature our users asked for, or a new article for our blog, we prioritize collaboration to deliver exceptional outcomes.

We love having fun as much as we love work. Our #nablabla channel is as active as our #feature-show-off channel, we exercise during the work day at least 3 times a week (yoga, running, pilates, or HIIT, your choice!), enjoy regular off-sites to gather the team, and travel to see each other in places like NY, Paris, San Francisco, and many other vibrant cities. Oh, and we’re constantly snacking on chocolate or nuts!

If this sounds like an environment you’ll thrive in, we look forward to reading your application!

Our Values at Nabla
Joining Nabla means being part of a team that shares a commitment to excellence, humility, growth, and inclusion.

Every day is a new chance to excel
We aim for nothing less than the best and are willing to put in the effort and dedication required to exceed standards. We learn from yesterday’s failures and do better every day.

Stay humble
There’s no place for ego in our team. Our collective success is more important than individual achievements. We see humility as wisdom — keeping focus on the bigger picture.

Feedback is a gift
We embrace feedback and foster a culture of trust and respect that helps everyone grow. We communicate openly about both achievements and challenges, and we actively involve each other in finding solutions.

Committed to diversity
We recognize the ongoing challenge of diversity in tech. Our responsibility starts with fostering an inclusive environment where everyone feels empowered to be their authentic selves and do their best work.

Diversity & Inclusion
Diversity and inclusivity are fundamental values at Nabla. We embrace individuals from various backgrounds, including race, gender, educational history, sexual orientation, and beyond.

As an equal opportunity employer, we actively seek out and welcome applicants from diverse backgrounds, believing that a wide range of perspectives enriches our team and enhances our ability to innovate and thrive.

Avoid recruitment scams: Stay safe and informed

There is an active employment scam which is now using Nabla to collect personal information or financial scams. If you’re contacted by a Nabla recruiter, please ensure whomever is contacting you truly represents Nabla and is utilizing a nabla.com email address. We will never ask for the exchange of any money or credit card details during the recruitment process. Nabla utilizes a hiring platform for all applications; please be aware of any suspicious email activity from people who could be pretending to be recruiters or senior professionals at Nabla. You can find more information following this link.

Nabla does not accept unsolicited CVs from recruiters or employment agencies in response to the Nabla Careers page or a Nabla social media post. Any unsolicited CVs, including those submitted directly to hiring managers, are deemed to be the property of Nabla.

This is a saved copy of a posting published elsewhere. Postings get taken down without notice — check the employer's site before applying. mentors.coach is not the hiring party.

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A discount on mentoring

Winners are drawn at random among entries with a confirmed email. The date and the full rules are on the draw page.

Draw rules

Backend Engineer

Forward Deployed Engineer - Paris

OpenAI

Parisfulltime

Apply on the employer's site

Role description

About The Team
OpenAI’s Forward Deployed Engineering team partners with customers to turn research breakthroughs into production systems. We operate at the intersection of customer delivery and core platform development.

About The Role
Forward Deployed Engineers (FDEs) lead complex end-to-end deployments of frontier models in production alongside our most strategic customers. You will own discovery, technical scoping, system design, build, and production rollout, partnering directly with customer engineering and domain teams.

You will measure success through production adoption, measurable workflow impact, and eval-driven feedback that changes product and model roadmaps. You’ll work closely with our Product, Research, Partnerships, GRC, Security, and GTM teams.

This role is based in Paris. We use a hybrid work model of 3 days in the office per week. We offer relocation assistance. Travel up to 50% is required.

In this role you will

  • Own technical delivery across multiple deployments from first prototype to stable production
  • Build full-stack systems that deliver customer value and sharpen how we learn
  • Embed closely with customer teams, understand their needs, and guide adoption of what you build
  • Scope work, sequence delivery, and remove blockers early
  • Make trade-offs between scope, speed, and quality; adjust plans to protect delivery
  • Contribute directly in the code when progress or clarity depends on it
  • Codify working patterns into tools, playbooks, or building blocks that others can use
  • Share field feedback that helps Research and Product understand where the models succeed and where they can improve
  • Keep teams moving through clarity and follow-through

You might thrive in this role if you

  • Bring 5+ years of engineering or technical deployment experience that includes customer-facing work
  • Have scoped and delivered complex systems in fast-moving or ambiguous environments
  • Write and review production-grade code across frontend and backend using Python, JavaScript, or comparable stacks
  • Have built or deployed systems powered by LLMs or generative models and understand how model behaviour affects product experience
  • Simplify complexity and make fast, sound decisions under pressure
  • Communicate clearly with engineers, product teams, and customer stakeholders
  • Spot risks early and adjust without slowing down
  • Model calm and judgment when the stakes are high

About OpenAI
OpenAI is an AI research and deployment company dedicated to ensuring that general-purpose artificial intelligence benefits all of humanity. We push the boundaries of the capabilities of AI systems and seek to safely deploy them to the world through our products. AI is an extremely powerful tool that must be created with safety and human needs at its core, and to achieve our mission, we must encompass and value the many different perspectives, voices, and experiences that form the full spectrum of humanity.

We are an equal opportunity employer, and we do not discriminate on the basis of race, religion, color, national origin, sex, sexual orientation, age, veteran status, disability, genetic information, or other applicable legally protected characteristic.

For additional information, please see OpenAI’s Affirmative Action and Equal Employment Opportunity Policy Statement.

Background checks for applicants will be administered in accordance with applicable law, and qualified applicants with arrest or conviction records will be considered for employment consistent with those laws, including the San Francisco Fair Chance Ordinance, the Los Angeles County Fair Chance Ordinance for Employers, and the California Fair Chance Act, for US-based candidates. For unincorporated Los Angeles County workers: we reasonably believe that criminal history may have a direct, adverse and negative relationship with the following job duties, potentially resulting in the withdrawal of a conditional offer of employment: protect computer hardware entrusted to you from theft, loss or damage; return all computer hardware in your possession (including the data contained therein) upon termination of employment or end of assignment; and maintain the confidentiality of proprietary, confidential, and non-public information. In addition, job duties require access to secure and protected information technology systems and related data security obligations.

To notify OpenAI that you believe this job posting is non-compliant, please submit a report through this form. No response will be provided to inquiries unrelated to job posting compliance.

We are committed to providing reasonable accommodations to applicants with disabilities, and requests can be made via this link.

OpenAI Global Applicant Privacy Policy

At OpenAI, we believe artificial intelligence has the potential to help people solve immense global challenges, and we want the upside of AI to be widely shared. Join us in shaping the future of technology.

This is a saved copy of a posting published elsewhere. Postings get taken down without notice — check the employer's site before applying. mentors.coach is not the hiring party.

Backend Engineer

Senior Full-Stack Developer

Leonar

Parisfulltimesenior

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Role description

Licorne Society a été missionné par une startup/InsurTech en pleine croissance pour les aider à trouver leur Senior Full-Stack Developer.

Descriptif du poste
Le produit que nous construisons et mettons entre les mains des utilisateurs est la base de la proposition de valeur : offrir des parcours efficaces, transparents, et fiables lors de toutes les interactions avec le produit d’assurance, notamment lors de l’onboarding, et lors de la déclaration de sinistres.

En tant que senior full-stack developer, tes missions seront de :

  • Développer de bout en bout les fonctionnalités dont tu aura la responsabilité, et coordonner leur lancement et leur suivi avec le produit et les stakeholders
  • Utiliser ta vision technique pour identifier des opportunités et les partager avec le reste de l’entreprise
  • Participer à l’évolution de la vision technique commune

Le fonctionnement de notre équipe
Les membres de l’équipe gèrent leurs sujets de bout en bout et s’intéressent à toutes les technologies de la stack.

Comme il n’est pas possible d’être expert dans tous les domaines, nous recourrons souvent au pair coding sur les parties sur lesquelles nous sommes le moins à l’aise. L’approche sur les sujets complexes est souvent discutée à plusieurs avant de commencer à coder.

Les développeurs, le product designer et le product manager co-conçoivent les fonctionnalités et l’UI. On privilégie les séances de travail en pair dev / design pour être sûr de bien se comprendre et imaginer les meilleurs solutions possibles, à travers plusieurs itérations qui convergent vers le produit final.

On saisit toutes les opportunités d’améliorer nos outils et on reste à la pointe. La productivité qui en découle nous permet de rester dans un cercle vertueux. Notre stack est aujourd’hui composée de MongoDB, full stack TypeScript, tRPC, React, Emotion et Vite. Nos dépendances sont en permanence à la dernière version disponible.

Stack technique
Notre stack technique privilégie la sécurité des types et l’efficacité avec TypeScript. Nous utilisons React, Emotion, TanStack Router, et tRPC pour gérer l’état et la communication frontend-backend avec une forte sécurité des types.

L’infrastructure repose sur Kubernetes (GKE), Terraform, et ArgoCD pour l’hébergement et l’automatisation des déploiements. Les tests sont gérés par Vitest, Playwright, et Cucumber, avec des environnements éphémères via GitHub Actions pour les revues de code.

Les évolutions futures viseront à améliorer l’expérience développeur, optimiser la qualité et passer à une approche multi-cloud pour plus de robustesse et réduire les coûts.

Ton travail au quotidien

  • Investiguer et résoudre tout bug, crash, ou alerte qui se présenterait (politique zéro-bug)
  • Planifier, développer et mettre en production des évolutions fonctionnelles
  • Échanger avec notre Product Designer et notre Product Manager sur les aspects fonctionnels et UI du travail
  • Proposer des évolutions des éléments de framework quand le besoin se fait sentir
  • Faire évoluer notre UI Kit quand apparaît un nouveau composant ou une évolution
  • Challenger les solutions proposées, avoir de nouvelles idées, faire preuve de créativité
  • Avoir un comportement exemplaire et servir de modèle pour les futurs employés de l'entreprise : curiosité, humilité, recherche du feedback, créativité, engagement.

Profil recherché

  • Tu es à l’aise avec JavaScript et Node.js, et connais l’écosystème (la maîtrise de Typescript est un plus)
  • Tu as du recul sur les choix d’architecture, et sais raisonner dessus en fonction des objectifs business
  • Tu es autonome, sais t’auto-motiver, et as la capacité à t’auto-former
  • Tu t’intéresses aux autres équipes et as un fort intérêt pour le métier
  • Tu sais émettre des critiques constructives et apporter ta propre vision quand cela est pertinent
  • Tu es à la recherche de feedback dans un état d’esprit d’amélioration continue
  • Rapidité et efficacité sur les tâches de développement backend classiques, comme fournir au frontend des APIs implémentant la logique métier, s’appuyer sur les structures de données classiques pour manipuler des données, organiser les données en base, évaluer, choisir, et utiliser des APIs tierces parties, implémenter des tâches de fond
  • Maîtrise de HTML, CSS et React, ainsi que la capacité d’être force de proposition sur l’architecture du frontend

This is a saved copy of a posting published elsewhere. Postings get taken down without notice — check the employer's site before applying. mentors.coach is not the hiring party.

Backend Engineer

Backend Engineer

Leonar

Parisfulltimesenior

Apply on the employer's site

Role description

Licorne Society a été missioné par une startup IA en pleine croissance pour recruter leur Backend Engineer.

About The Company
We’re building the
AI copilot for notaries and real-estate professionals
, automating complex legal workflows and document analysis.

Our platform combines
FastAPI
,
PostgreSQL
,
LLMs
, and
knowledge graphs
to reduce transaction times by over
80%
.

Having reached
early product-market fit
, we’re now scaling rapidly — expanding data pipelines, integrations, and AI-powered document logic.

You’ll join a small, focused engineering team at the moment when product architecture still shapes the company’s future.

Role Overview

As
Backend Engineer
, you’ll build the core systems behind a high-trust, mission-critical product used daily by legal professionals.

You’ll work closely with our
Lead Backend Engineer, Lead Frontend Engineer and Lead LLM
Engineer
to design APIs, improve performance, and ship new AI-driven features.

We iterate fast and value reliability, ownership, and clarity of thought.

What You’ll Do

  • Design and ship clean, well-tested REST APIs using FastAPI
  • Implement business logic for document processing and data flows
  • Design and optimize PostgreSQL schemas and queries (SQLAlchemy)
  • Integrate with third-party APIs (Stripe, HubSpot, OCR/AI providers)
  • Contribute to background jobs and async pipelines (Celery, Redis)
  • Write tests and CI pipelines ensuring reliability at scale

What We’re Looking For

Core Technical Skills

  • 3–5 years of backend development with Python
  • Solid experience with FastAPI (or Flask)
  • Strong grounding in PostgreSQL and SQLAlchemy
  • Skilled in REST API design, testing (pytest), and Git workflow
  • Familiar with Docker, Google Cloud Tasks

Bonus

  • Integrations with Stripe, HubSpot, OCR, or AI APIs
  • Experience with Azure or Google Cloud
  • Background in document automation or legal tech
  • Understanding of async programming and performance tuning

Mindset

  • You write maintainable, production-ready code
  • You thrive in fast feedback loops and small teams
  • You value clarity, precision, and accountability

What You’ll Get

  • Impact: Build the infrastructure behind a product handling real estate transactions worth millions.
  • Learning: Collaborate with senior engineers working at the frontier of AI, data, and legal tech.
  • Ownership: End-to-end responsibility on features that ship fast and matter.
  • Compensation: Competitive salary + stock options.

This is a saved copy of a posting published elsewhere. Postings get taken down without notice — check the employer's site before applying. mentors.coach is not the hiring party.

Backend Engineer

Staff Software Engineer - Security Agent

Datadog

Parisfulltimelead

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Role description

This role is part of Datadog’s Security Agent team, which powers critical security capabilities across Workload Protection, Vulnerability Management, Cloud Security products, and other emerging security offerings. As a Staff Software Engineer, you will lead the design and development of low-level Linux instrumentation and runtime security technologies that help customers detect threats, monitor system activity, and protect cloud-native workloads at scale. You will work on complex technical challenges involving eBPF, Linux kernel internals, performance-sensitive systems, and large-scale data collection while influencing technical direction across multiple product teams. This role offers significant ownership, broad organizational impact, and the opportunity to shape the future of Datadog’s security platform.

At Datadog, we place value in our office culture - the relationships and collaboration it builds and the creativity it brings to the table. We operate as a hybrid workplace to ensure our Datadogs can create a work-life harmony that best fits them.

What You’ll Do:

  • Lead the architecture and development of security agent capabilities that power runtime threat detection and workload protection across Datadog Security products.
  • Design and build reusable eBPF-based monitoring functionality for process, file, and network visibility within Linux environments.
  • Drive end-to-end delivery of new features, from technical strategy and design through implementation, testing, and rollout.
  • Establish and evolve testing methodologies that improve platform coverage, detection quality, reliability, and performance.
  • Partner with product, security, infrastructure, and engineering teams to deliver shared platform capabilities used across multiple Datadog products.
  • Provide technical leadership by influencing engineering direction, mentoring peers, and helping resolve complex cross-functional challenges.

Who You Are:

  • You have significant experience building software in Linux environments, including knowledge of Linux internals, kernel APIs, or systems programming.
  • You have hands-on experience with eBPF, kernel-level instrumentation, driver development, networking systems, agent development, or related low-level technologies.
  • You've built and run systems where performance and reliability actually matter.
  • You have experience building and maintaining production software across diverse Linux distributions and kernel versions.
  • You are product-minded and customer-focused, balancing technical excellence with customer impact and usability.

About Datadog:
Datadog is the leading observability and security platform for the AI era, providing businesses with unified visibility across the technology stack to manage complexity at scale. It brings applications, infrastructure, data, models, and security into one place, using AI to detect and resolve issues before they impact customers. Trusted globally by Fortune 500 companies and high-growth AI leaders, Datadog enables businesses to move faster with clarity and confidence. Learn more about #DatadogLife on Instagram, LinkedIn, and Datadog Learning Center.

Equal Opportunity at Datadog:
Datadog is proud to offer equal employment opportunity to everyone regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity, veteran status, and other characteristics protected by law. We also consider qualified applicants regardless of criminal histories, consistent with legal requirements. Here are our Candidate Legal Notices for your reference.

Datadog endeavors to make our Careers Page accessible to all users. If you would like to contact us regarding the accessibility of our website or need assistance completing the application process, please complete this form. This form is for accommodation requests only and cannot be used to inquire about the status of applications.

Privacy and AI Guidelines:
Any information you submit to Datadog as part of your application will be processed in accordance with Datadog’s Applicant and Candidate Privacy Notice. For information on our AI policy, please visit Interviewing at Datadog AI Guidelines.

This is a saved copy of a posting published elsewhere. Postings get taken down without notice — check the employer's site before applying. mentors.coach is not the hiring party.

280 more openings in this category and country

Senior Back-end engineerNabla · France

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