Software Engineer

Zefir; Paris; Sur place; EUR 50 000 - 70 000; Plein temps

Avantages offerts par ce poste

Competitive salary

BSPCE (Stock Options)

Healthcare plan

Flexible remote work options

Swile meal card

Swile mobility card

Team events

Résumé du poste

A tech company specializing in AI, based in Paris, seeks a talented developer to create high-performance APIs and intuitive web applications. The role involves working collaboratively with cross-functional teams and owning the lifecycle of features. Candidates should have strong problem-solving skills and be fluent in English. This position offers a competitive salary, healthcare plan, options for remote work, and various perks including meal and mobility cards.

Qualifications

• Proven experience developing APIs and web applications.
• Ability to work collaboratively across teams.
• Strong communication skills in English.

Responsabilités

• Develop and deploy robust APIs using Node.js, TypeScript, and GraphQL.
• Build frontend applications with React.js, ensuring great user experience.
• Collaborate with diverse teams to prioritize features and objectives.
• Own the full lifecycle of features from ideation to monitoring.
• Write clean and thoroughly-tested code for fast deployments.
• Contribute to strategic decisions on web applications.

Connaissances

Entrepreneurial mindset

Problem-solving skills

Collaboration

Positive attitude

Fluent in English

Outils

Node.js

TypeScript

Nest.js

GraphQL

React.js

Next.js

Pinecone

Langchain

Description du poste

Who We Are

Zefir is building an AI autopilot for home sales in Europe, starting in France: an AI agent runs the entire sale and purchase journey end-to-end, orchestrating local brokers, portals, buyers, and documents.

Backed by over $55 million from top-tier investors like Sequoia Capital, we're committed to accelerating life changes for millions of current and future European homeowners.

Engineering Team

At Zefir, our Engineering Team is the driving force behind our mission to accelerate life changes. Growing rapidly from 9 to 30+ engineers, we don’t just write code—we solve meaningful problems for our customers.

From ideation to launch and beyond, engineers at Zefir take full ownership of their work, ensuring that every feature delivers the expected impact. We leverage LLM-based development workflows and shared best practices to automate repetitive tasks, allowing us to keep our codebase lean, scalable, and built for speed.

Responsibilities/Mission

• Develop and deploy robust, high-performance APIs using Node.js (TypeScript), Nest.js, and GraphQL.
• Build intuitive frontend applications with React.js and Next.js, delivering outstanding user experiences.
• Collaborate closely with Product Managers and cross-functional teams (Operations, Growth, Brand) to prioritize features and deliver key objectives.
• Own the full lifecycle of features from ideation and design through implementation, deployment, and performance monitoring.
• Write clean, maintainable, thoroughly-tested code to ensure fast deployments and continuous improvement.
• Implement comprehensive end-to-end (E2E) tests to ensure reliability and reduce code review cycles.
• Proactively contribute to strategic decisions about the future direction of our web applications and infrastructure.
• Leverage LLM-based libraries and implement key AI-driven functionalities (RAG, memory, agentic workflows) using stacks like Pinecone and Langchain.

Qualification

• Entrepreneurial mindset with a demonstrated ability to turn ambitious ideas into practical solutions.
• Excellent problem-solving skills, with the ability to quickly evaluate and recommend effective technological solutions.
• Highly collaborative, open-minded, and comfortable working closely with diverse teams.
• Ambitious, performance-oriented, and maintains a positive attitude.
• Fluent in English for clear and effective communication.

Benefits

• Competitive salary: You can run your own simulation with our salary calculator.
• BSPCE (Stock Options): Available for everyone, with monthly vesting after year one, over a 4-year period.
• Healthcare plan: Full coverage with Alan for team members, their partners, and children.
• Office in Le Peletier, Paris (9th arrondissement): With flexible remote work options.
• Swile meal card: €11 per worked day.
• Swile mobility card: €42/month to support sustainable transportation (metro, carpooling, biking…).
• Team events: Monthly Mixers to connect and share good times, and quarterly All Hands to celebrate wins across the company.

EEO Statement

We welcome applications from anyone, regardless of background, gender, sexual orientation, religion, age, or experience. Our team values authenticity and diverse perspectives.