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H Company

Senior Full-stack Engineer

Sorry, this job was removed at 08:13 a.m. (GMT) on Friday, Aug 08, 2025
In-Office
Paris, Île-de-France
In-Office
Paris, Île-de-France

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About H: H exists to push the boundaries of superintelligence with agentic AI. By automating complex, multi-step tasks typically performed by humans, AI agents will help unlock full human potential.

H is hiring the world’s best AI talent, seeking those who are dedicated as much to building safely and responsibly as to advancing disruptive agentic capabilities. We promote a mindset of openness, learning and collaboration, where everyone has something to contribute.

Holistic, Humanist, Humble.


About the Team: The Product Engineering Team is committed to ensuring the successful implementation of our Agents platform for Web Automation. The platform will empower a wide range of professionals, from Web Testing engineers, who ensure websites behave as intended, to automation professionals, who automate data collection and interactions on complex websites.

Key Responsibilities:

  • Design and implement secure, robust and scalable services via REST/gRPC

  • Handle database interactions, including schema design, querying, and optimization

  • Integrate third-party APIs and services

  • Implement integration and end-to-end tests to ensure code quality

  • Develop responsive web interfaces and connect them to backend APIs

  • Set up and maintain continuous integration and deployment workflows

  • Ensure application reliability via logging/monitoring/alerting

  • Follow best practices to avoid vulnerabilities and adhere to industry standards

Requirements:

  • Technical skills:

    • Strong 4+ years of experience in Python backend development (Flask, Django, FastAPI or similar) and HTML5, CSS3, JavaScript, React/Redux (ideally) or similar frameworks on the front-end

    • Proven ability to design and build REST or gRPC APIs

    • In-depth experience with distributed systems or cloud computing, preferably in AWS

    • Expertise in relational and/or non-relational databases

    • Experience working with message queueing technologies (SQS/RabbitMQ/Kafka/etc.)

    • Experience with browser security and cross-browser compatibility techniques

    • Good understanding of coding standards, architectural patterns and test frameworks

    • Expertise in instrumentation, observability and monitoring

    • Experience with CI/CD pipelines, local development via Docker and build/package tooling

Location:

  • H's teams are distributed throughout France, the UK, and the US

  • This role has the potential to be fully remote or hybrid for candidates based in cities where we have an office - currently Paris and London

  • The final decision for this will lie with the hiring manager for each individual role

What We Offer:

  • Join the exciting journey of shaping the future of AI, and be part of the early days of one of the hottest AI startups

  • Collaborate with a fun, dynamic and multicultural team, working alongside world-class AI talent in a highly collaborative environment

  • Enjoy a competitive salary

  • Unlock opportunities for professional growth, continuous learning, and career development

If you want to change the status quo in AI, join us.

What you need to know about the London Tech Scene

London isn't just a hub for established businesses; it's also a nursery for innovation. Boasting one of the most recognized fintech ecosystems in Europe, attracting billions in investments each year, London's success has made it a go-to destination for startups looking to make their mark. Top U.K. companies like Hoptin, Moneybox and Marshmallow have already made the city their base — yet fintech is just the beginning. From healthtech to renewable energy to cybersecurity and beyond, the city's startups are breaking new ground across a range of industries.

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