Lead Backend Developer

What you’ll do:

• Design and implement a new high-scale system for millions of users.
• Build convenient CI/CD processes and testing pipelines to support quick iterative development and system stability.
• Research and make decisions about the technological stack and system design, considering all trade-offs.
• Work on ML model development with our team to build robust data pipelines and deploy ML models.
• Analyse large corpora of data and build real-time recommendation systems.
• Scale backend and web frontend development teams.
• Deliver numerous new, useful, and interesting features.

Work with large amounts of data in different modalities:

• Texts.
• Videos.
• Images.
• Audio.

Work in a very cross-functional team, side by side with mobile developers, product managers, ML engineers, and designers.

Skills needed

• Build high-load applications from scratch.
• Deep knowledge of AWS.
• Problem-solving.
• Requirements gathering.
• Architecture planning (trade-offs management).
• Estimation skills (time, users, traffic, money, algorithmic complexity, cache, etc.).
• Clean code practices.
• Architecture scalability and simplicity.
• Research skills (new APIs, libraries, services, and their estimations).
• CI/CD automation pipelines.
• Proficiency with Terraform and Docker.
• SOLID, KISS principles, decomposition principles, and resolving monolith vs. microservices trade-offs.
• Experience in code review.
• Experience with unit, E2E, and UI testing frameworks.
• Experience with SQL and NoSQL databases.
• Best practices in building scalable mobile APIs (REST, HTTPS, etc.).
• Good principles of security management (secrets, protocols, etc.).
• Experience with some Python web frameworks (Django, Flask, FastAPI, etc.).
• CAP.
• Experience of working from three years.

Skills nice to have:

• Speak or learn to speak more than one language.
• Experience with real-time databases.
• Experience with in-memory databases.
• Experience with frontend frameworks.
• Experience in developing educational products.
• Knowledge-sharing experience (tech talks, articles, YouTube videos, etc.).
• Experience (even non-production) with different types of programming languages: interpreted, compiled, with garbage collection, manual memory management, reference counting memory management, etc.

Current tech stack:

• Python.
• AWS.
• MongoDB.
• Firebase.
• Docker.
• Terraform.
• React.
• PostgreSQL.

What we can offer

• A real-deal startup adventure: you'll be hopping on a major project while it's still in the works.
• A cool "Do Your Thing" vibe.
• A crew all about people and products.
• Always room to grow.
• Flexible schedule.
• Work in the London office.
• Freedom to suggest, implement, and test ideas.
• Competitive salary & perks.
• We offer substantial relocation assistance to support your move.