Lassie

Senior Software Engineer

Lassie

full-time

Posted on:

Location Type: Hybrid

Location: Paris • France

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Job Level

Senior

Tech Stack

GraphQLJavaScriptMongoDBNext.jsNode.jsPostgresPythonReactTypeScript

About the role

  • As a Senior Software Engineer on the Tech Claims team, you will work on products used daily by our claims handlers.
  • Leveraging AI and automation, these tools help: assist handlers in decision-making, automatically understand and analyze documents, and in some cases manage a claim end-to-end through to payment.
  • Develop and maintain robust, scalable web applications.
  • Design backend APIs in TypeScript / Node.js, exposed via GraphQL.
  • Build modern, high-performance front-end interfaces with Next.js / React.
  • Develop Python services for integrating LLM APIs (OpenAI or others).
  • Actively contribute to the automation of claims management processes.
  • Contribute to architectural decisions and ensure code quality.

Requirements

  • Minimum 5 years of web development experience (10 years or more is a plus)
  • Excellent command of TypeScript / Node.js
  • Strong experience with React / Next.js
  • Experience with GraphQL, MongoDB and PostgreSQL
  • Good knowledge of Python, ideally in AI-related projects
  • Strong interest in automation and large language models (LLMs)
  • Ability to work in an international environment
  • Professional-level English is required (written and spoken)
  • Autonomy, curiosity and a product-impact mindset.
Benefits
  • Join a fast-growing European scale-up
  • Work on topics that combine web development, AI and advanced automation
  • Have a direct impact on operational efficiency and customer experience
  • Equity participation
  • Flexible, supportive and product-oriented company culture
  • Work for a brand that genuinely improves the lives of animals
  • Employee discount on Lassie pet insurance
  • Swile meal card

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard skills
TypeScriptNode.jsReactNext.jsGraphQLPythonMongoDBPostgreSQLAIautomation
Soft skills
autonomycuriosityproduct-impact mindsetcommunicationcollaboration