Job VC
Senior Backend Developer (Java)
Technologies
Description
Project Overview
You will be joining a mature, data-driven digital health platform that helps users better understand their health, performance, and longevity through personalized insights. The product aggregates and processes large volumes of biometric, laboratory, and lifestyle data, transforming them into actionable recommendations using advanced analytics.
From a technical perspective, this is a high-load, production-grade system with:
complex backend logic and data pipelines,
heavy API usage and third-party integrations,
strict requirements for reliability, performance, and scalability,
continuous growth in users, data volume, and feature set.
The platform operates as a long-running SaaS product with a strong focus on backend architecture, data consistency, and system evolution rather than short-term feature delivery.
Responsibilities
As a Senior Backend Developer, you will:
Design, develop, and maintain backend services written in Java
Participate in architecture design and contribute to long-term technical decisions
Build and evolve RESTful APIs used by web and mobile clients
Develop and support microservices in a distributed environment
Work with relational and NoSQL databases, optimizing queries and data models
Design scalable solutions for high-load and data-intensive workloads
Integrate third-party services and internal platform components
Ensure code quality through clean, maintainable, and well-tested code
Participate in code reviews, technical discussions, and system design sessions
Collaborate with frontend, QA, DevOps, and product teams
Contribute to performance optimization, reliability improvements, and technical debt reduction
Requirements
Must-have
7+ years of professional backend development experience
Strong knowledge of Java (11 or higher)
Excellent understanding of OOP, design patterns, and clean architecture principles
Strong experience with Spring / Spring Boot and modern Java ecosystem
Solid experience with RESTful architecture and API design
Experience building and operating microservices
Experience with AWS or other cloud platforms (AWS preferred)
Experience with MySQL and/or PostgreSQL
Experience with NoSQL databases (e.g., MongoDB, DynamoDB, Redis)
Experience with Git and Jira
Understanding of backend scalability, performance tuning, and distributed systems
Familiarity with Docker, container-based deployment, and Linux environments
Experience working with high-load or data-intensive systems
Ability to write clean, readable, and maintainable code
English level: B2 (Upper-Intermediate) or higher
Nice to have
Experience with message brokers (RabbitMQ, Kafka, or similar)
Experience with CI/CD tools (TeamCity, Jenkins, GitHub Actions, etc.)
Experience with Kubernetes or container orchestration
Experience working in Agile/Scrum environments
Knowledge of build tools (Maven or Gradle)
Basic knowledge of GNU/Linux and bash
You will be joining a mature, data-driven digital health platform that helps users better understand their health, performance, and longevity through personalized insights. The product aggregates and processes large volumes of biometric, laboratory, and lifestyle data, transforming them into actionable recommendations using advanced analytics.
From a technical perspective, this is a high-load, production-grade system with:
complex backend logic and data pipelines,
heavy API usage and third-party integrations,
strict requirements for reliability, performance, and scalability,
continuous growth in users, data volume, and feature set.
The platform operates as a long-running SaaS product with a strong focus on backend architecture, data consistency, and system evolution rather than short-term feature delivery.
Responsibilities
As a Senior Backend Developer, you will:
Design, develop, and maintain backend services written in Java
Participate in architecture design and contribute to long-term technical decisions
Build and evolve RESTful APIs used by web and mobile clients
Develop and support microservices in a distributed environment
Work with relational and NoSQL databases, optimizing queries and data models
Design scalable solutions for high-load and data-intensive workloads
Integrate third-party services and internal platform components
Ensure code quality through clean, maintainable, and well-tested code
Participate in code reviews, technical discussions, and system design sessions
Collaborate with frontend, QA, DevOps, and product teams
Contribute to performance optimization, reliability improvements, and technical debt reduction
Requirements
Must-have
7+ years of professional backend development experience
Strong knowledge of Java (11 or higher)
Excellent understanding of OOP, design patterns, and clean architecture principles
Strong experience with Spring / Spring Boot and modern Java ecosystem
Solid experience with RESTful architecture and API design
Experience building and operating microservices
Experience with AWS or other cloud platforms (AWS preferred)
Experience with MySQL and/or PostgreSQL
Experience with NoSQL databases (e.g., MongoDB, DynamoDB, Redis)
Experience with Git and Jira
Understanding of backend scalability, performance tuning, and distributed systems
Familiarity with Docker, container-based deployment, and Linux environments
Experience working with high-load or data-intensive systems
Ability to write clean, readable, and maintainable code
English level: B2 (Upper-Intermediate) or higher
Nice to have
Experience with message brokers (RabbitMQ, Kafka, or similar)
Experience with CI/CD tools (TeamCity, Jenkins, GitHub Actions, etc.)
Experience with Kubernetes or container orchestration
Experience working in Agile/Scrum environments
Knowledge of build tools (Maven or Gradle)
Basic knowledge of GNU/Linux and bash