Back-End Developer

Stack

Responsibilities

• ▹Develop and maintain backend functionality for the mobile product, admin panel and internal services
• ▹Build and support REST APIs for the mobile application and internal tools
• ▹Develop features powering workout personalization, content management and user journeys
• ▹Design new data models, extend business logic and improve the existing backend architecture
• ▹Work with MongoDB (Mongoose), PostgreSQL and Redis
• ▹Build integrations with external services, webhooks and AWS
• ▹Manage file storage and media assets using AWS S3
• ▹Implement and maintain secure authentication and authorization mechanisms using JWT and OAuth
• ▹Optimize database performance, improve query efficiency, contribute to data migration
• ▹Collaborate closely with Product Managers, Designers and Engineers
• ▹Contribute to technical documentation and continuously improve backend architecture

Requirements

• ▹3+ years of commercial experience as a Back-End Developer
• ▹Strong hands-on experience with Node.js and TypeScript
• ▹Practical experience with MongoDB and Mongoose
• ▹Experience with PostgreSQL or other relational databases
• ▹Experience working with Redis
• ▹Hands-on experience building and maintaining REST APIs
• ▹Understanding of scalable backend architecture principles
• ▹Experience integrating external services and working with webhooks
• ▹Solid understanding of authentication and authorization mechanisms (JWT, OAuth)
• ▹Experience working with AWS (experience with AWS S3 is a strong plus)
• ▹Experience using Git in a collaborative development environment
• ▹Understanding of clean architecture principles, REST and SOLID

Nice to have

• ▹Experience working with RabbitMQ or other messaging/queue systems
• ▹Experience using Docker
• ▹Hands-on experience with Swagger/OpenAPI
• ▹Understanding of ACID principles and database transactions
• ▹Experience with ORM frameworks such as TypeORM, Sequelize

Soft skills

About the company

Fit4Me is a Health & Fitness product focused on user personalization, product stability and fast feature delivery.