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Posted about 1 month ago

At LabelFlow, we build an open image annotation platform. Our mission is to facilitate and accelerate the development of AI models at scale thanks to top-notch labeling tools and a public library of image datasets.

LabelFlow is being built with the experience accumulated by Sterblue (Y Combinator S18), where we have learned first-hand the importance of quality datasets to automate wind turbine and powerline visual inspections.

We are a team of 7 people based in Nantes and Lisbon and we are going full remote. For timezone convenience, the positions are opened in Europe only at this time. We are product driven engineers and developers committed to move fast and execute the best work of our lives!


We are looking for a Senior Back-End Engineer with experience in Node and a good team spirit. Extensive skills in SQL are a must. At LabelFlow, you will:

  • Ship, own and continuously improve features and backend services
  • Work very closely with the product team to inform the product strategy and direction
  • Contribute to architecting and further developing our backend tech stack
  • Be a company expert on our backend
  • Ensure high-quality standards through code review and testing

The position is open to remote workers located in Europe only for now for timezone convenience. We have team members in Nantes and Lisbon.

Solid experience in the following technical fields is welcome, we have high expectations on these topics. We are interested in your profile for this position if:

  • You have built production quality backend apps and APIs in Javascript / Typescript and NodejS
  • You are proficient in SQL and database administration
  • Experience with Python
  • Driven by creating value for customers, not just scientific accuracy and you see perfect as the enemy of done
  • Comfortable with ambiguity, lack of structure, and a greenfield environment where you can (and have to) build a lot from scratch
Nice to have
  • Experience with advanced aspects in Python: AsyncIO, Machine learning frameworks such as PyTorch
  • Experience with NextJS
  • Experience with Docker, or even Kubernetes
  • Experience with GraphQL, Apollo, Graphene, Ariadne or similar
  • Experience with a cloud platform such as AWS, Google Cloud or similar
  • You care about simplicity and performance
  • You are interested in the AI and machine learning ecosystem
In the first month you will
  • Get comfortable with the current application and its codebase
  • Start working on small issues and improvements
  • Deploy and monitor deployment of AI tools with Python
Within the first 3 months you will
  • Develop new features on our backend based on interaction with the product management
  • Develop new GraphQL resolvers and API routes in our backend
  • Manage our Postgres database and perform migrations
  • Work on our Github CI workflows

Additionally, here are some general skills that LabelFlow people tend to have

  • You are fluent in English
  • At least 5 years experience in Back End
  • You are very curious and won't stop searching until you find the answer
  • You work meticulously. You like beautiful things and people around you trust you on that
  • You are fun and have a life outside of work!

Team Benefits

  • Remote friendly
  • Health insurance 100% carried by LabelFlow
  • Meal vouchers - Ticket Restaurant of 8€ (50% paid by LabelFlow)
  • Afterworks, knowledge sharing sessions & conferences, team buildings, one week annual team event