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Fullstack Developer (Développeur / Ingénieur Logiciel Confirmé)

France - Paris

Shift is the leading AI platform for insurance.  Shift combines generative, agentic, and predictive AI to transform underwriting, claims, and fraud and risk - driving operational efficiency, exceptional customer experiences and measurable business impact.  Trusted by the world's leading insurers, Shift delivers AI when and where it matters most, at scale and with proven results.

Our culture is built on innovation, trust, and a drive to transform the insurance industry through our SaaS platform. We come from more than 50 different countries and cultures and together we are creating the future of insurance.

As a Fullstack Engineer, you will join our core Engineering team to build complete designs for applications and features that deliver direct value to our customers. You will solve complex technical challenges by working within your squad and collaborating across the organization with Data Scientists, QA, and Product Managers. Your focus will be on delivering high-performance, scalable, and quality solutions that modernize our platform. This role is essential for driving the technical migrations and architectural improvements that power Shift’s mission.

What Your Impact Looks Like

At Shift, we value ownership from day one. In this role, you will:

  • Jump In & Own It: 
    • Take full ownership of technical tasks and resolve delivery blockers promptly without waiting for direction.
    • Design and implement intuitive user interfaces to collect and review information.
    • Build and maintain robust APIs that automate decision-making processes.
  • Simplify the Complex: Design, write and test (from unit to end-to-end) clear, clean, well-structured C# and React code that is easy for others to maintain. 
  • Test, Learn, Scale: 
    • Contribute to technical migrations, modernization efforts, and architectural improvements as our platforms evolve.
    • Experiment with new frameworks and use retrospectives to identify opportunities to improve delivery speed and quality.
  • Communicate with Impact: Share progress and technical trade-offs clearly during stand-ups, adapting the detail for both peers and stakeholders.
  • Solve Without Drama: Address production incidents and bugs calmly and methodically, focusing on root causes and long-term solutions.
  • Finish what you start: Demonstrate reliability by validating that all code meets user needs and is fully documented before moving to new work.

We work with modern technologies and always encourage our team to explore what’s new in the market. Our main tools are:

  • Frontend: React/Redux/TS/Vanilla Extract/LESS/Dev Container with Vite
  • Backend: ASP.NET, C#, MSSQL, Elasticsearch
  • IDE: your choice - Rider, VS Code, or Visual Studio + Resharper
  • Cloud: Microsoft Azure
  • Foundational toolchain: GitHub Enterprise, GHAS, GH Copilot + coding agent
  • CI/CD: GitHub Actions / TeamCity, Cypress, GH Packages (npm, NuGet), Octopus
  • Collaboration: Slack, Jira, Confluence

What You'll Need to Succeed

We are looking for a Shifter who is:

  • C# Expert: You have 2 to 4 years of experience in software development with a deep, production-level mastery of C# and .NET.
  • Fullstack-Capable: You are comfortable across the stack and have hands-on experience with React or modern JavaScript frameworks.
  • Architecturally Minded: You don’t just write code; you design scalable, maintainable systems and write clean, testable logic.
  • Growth-Oriented: You have a test-and-learn mindset, actively exploring new tools and frameworks to improve performance and quality.
  • Impact-Driven: You focus on outcomes over output, taking full ownership of your tasks from initial design to production monitoring.
  • Collaborative & Clear: You are a fluent English speaker who can explain technical trade-offs simply and partner effectively with cross-functional squads.
 
RECRUITMENT PROCESS
  • 30-minute video interview with our Talent Acquisition Specialist
  • 2x 1-hour technical interviews, one with a Backend dev and one with a Frontend dev
  • 1-hour final interview with the Hiring Manager

#LI-RH1 #LI-HYBRID 

 

To support our permanent, full time employees at every stage of their careers and lives, we provide a competitive total rewards and benefits package. Here are the global benefits we’d like to highlight:

  • Flexible remote and hybrid working options
  • Competitive Salary and a variable component tied to personal and company performance
  • Multiple Learning and Development opportunities, including Focus Fridays, a half-day each month to focus on learning and personal growth
  • Generous PTO and paid holidays
  • Mental health benefits 
  • 2 MAD Days per year (Make A Difference Days for paid volunteering)

Additional benefits may be offered by country, based on your eligibility - ask your recruiter for more information. Intern and Apprentice positions may receive some of these benefits - ask your recruiter for more details.

At Shift we strive to be a diverse and inclusive workforce. We welcome applications from and hire people who will contribute to the diversity of our company, without regard to race, color, religion, marital status, age, national or ethnic origin, physical or mental disability, medical condition, pregnancy, genetic information, gender identity or expression, sexual orientation, or other non-merit criteria.

Shift Technology is committed to providing reasonable accommodations for qualified individuals with disabilities in our application and employment process. Should you require accommodation, please email accommodation@shift-technology.com and we will work with you to meet your accessibility needs.

Please be aware of scammers and only trust correspondence that comes from emails ending in "shift-technology.com". We will never do initial outreach to you via Whatsapp/Text/SMS, never ask for banking information or personal identification numbers (ex. Social Security Number) as part of our recruitment process.

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

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Your personal data is collected by Greenhouse on behalf of Shift Technology to review your application and contact you. The processing of your data is necessary to take steps prior to entering into an employment contract with Shift Technology. 
Your information will be stored in Shift Technology candidate pool for one year from the date of your last contact with us and will be accessible by our recruitment and HR teams, as well as by the team offering the position. It may be transferred to non-European countries that ensure an adequate level of protection according to the European Commission or within the frameworks of the EU-US Privacy Shield or of standard contractual clauses adopted by the European Commission. 
You can request a copy of your data, its deletion or rectification, object to the processing of your data, request the restriction of its processing, and receive your information in portable form by contacting Shift Technology’s data protection officer here: dpo@shift-technology.com. 
After contacting us, if you are not satisfied with the way we handled your request, you may address a complaint to the supervisory authority of your country. 
By checking this box, you will declare that you read and agree to Shift Technology’s Privacy Policy and therefore authorize us to contact you about future job opportunities for up to 1 year after your last contact with us. 
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Vos informations seront conservées dans le vivier de candidats de Shift Technology pendant 1 an à compter de la date de votre dernier contact avec nous. Elles seront accessibles par nos équipes de recrutement et RH ainsi que par l’équipe proposant le poste. 
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Si vous estimez, après nous avoir contacté, que vos droits sur vos données n’ont pas été respectés, vous pouvez adresser une réclamation à l’autorité de votre pays. 
En cochant cette case, vous déclarez avoir lu et agréé à la Politique de Confidentialité de Shift Technology, nous autorisant ainsi à vous contacter pour de futures opportunités professionnelles pour une durée pouvant aller jusqu’à 1 an après notre dernier contact.