Job description template

Backend Developer Job Description

Recruit skilled Backend Developers using this job description template. Covers API development, database design, system architecture responsibilities, and.

The role in brief

A Backend Developer designs, builds, and maintains the server-side logic, databases, and APIs that power web and mobile applications. They are responsible for ensuring data integrity, application performance, and system security across the entire server-side architecture. The role requires expertise in at least one server-side language, relational and non-relational databases, API design patterns, and distributed systems concepts. Backend Developers work closely with Frontend Developers, DevOps Engineers, and Product Managers to deliver reliable, scalable services.

Design and implement RESTful and GraphQL APIs that serve frontend applications and third-party integrations with consistent response times under 200ms
Architect and optimize database schemas for PostgreSQL, MySQL, or MongoDB, implementing indexing strategies and query optimization to support growing data volumes
Build and maintain microservices or modular monolith architectures using Node.js, Python, Java, Go, or Ruby, following domain-driven design principles
Implement authentication and authorization systems using OAuth 2.0, JWT, or session-based mechanisms with proper security controls

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Responsibilities

Design and implement RESTful and GraphQL APIs that serve frontend applications and third-party integrations with consistent response times under 200ms
Architect and optimize database schemas for PostgreSQL, MySQL, or MongoDB, implementing indexing strategies and query optimization to support growing data volumes
Build and maintain microservices or modular monolith architectures using Node.js, Python, Java, Go, or Ruby, following domain-driven design principles
Implement authentication and authorization systems using OAuth 2.0, JWT, or session-based mechanisms with proper security controls
Design and integrate message queues and event-driven architectures using RabbitMQ, Kafka, or AWS SQS for asynchronous processing workflows
Write comprehensive automated tests including unit, integration, and contract tests, maintaining coverage above 80% for critical business logic
Optimize application performance through caching strategies (Redis, Memcached), connection pooling, and load testing with tools like k6 or Locust
Collaborate with DevOps to define deployment strategies, health checks, and infrastructure requirements for backend services
Document API contracts using OpenAPI/Swagger specifications and maintain internal technical documentation for architecture decisions
Participate in on-call rotations and incident response for production backend systems

Required skills

Server-side programming in Node.js (Express/Fastify), Python (Django/FastAPI), Java (Spring Boot), Go, or Ruby on RailsRelational database design and SQL proficiency (PostgreSQL, MySQL)API design patterns (REST, GraphQL) and API versioning strategiesAuthentication and security (OAuth 2.0, JWT, encryption, OWASP best practices)Caching mechanisms (Redis, CDN strategies)Message queues and event-driven architecture (Kafka, RabbitMQ, SQS)Testing methodologies (unit, integration, contract testing)Git version control and CI/CD pipeline familiarityBasic cloud services knowledge (AWS, GCP, or Azure compute, storage, and networking)

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Cohesyve reads the description above and generates a role-specific assessment with a scoring rubric. Each candidate gets a different version, so questions cannot be shared.

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Nice to have

Experience with container orchestration (Docker, Kubernetes)Knowledge of data streaming and real-time processing pipelinesFamiliarity with observability tools (OpenTelemetry, Jaeger, Datadog)Experience designing systems for horizontal scalability and high availability

Qualifications

1Bachelor's degree in Computer Science, Software Engineering, or equivalent professional experience
23-6 years of backend development experience in production environments
3Strong understanding of data structures, algorithms, and system design fundamentals
4Experience designing systems that handle significant concurrent traffic
5Clear communication skills for technical documentation and cross-team collaboration

Compensation and environment

Salary range

$100,000 - $165,000 per year depending on language expertise, system design experience, and location. Senior Backend Developers in major markets earn $140,000 - $200,000+.

Work environment

Hybrid or remote-first. Backend Developers typically work within product engineering squads alongside frontend developers, QA engineers, and product managers. On-call participation for production services is standard.

Career growth

Backend Developers advance to Senior Backend Developer, Staff Engineer, Principal Engineer, or Engineering Manager. Specialization paths include distributed systems, data infrastructure, and platform engineering. Many also move into Solutions Architecture or CTO tracks.

Common questions

Which backend language is most in demand?

Node.js (JavaScript/TypeScript) and Python lead in startup and mid-market environments due to ecosystem breadth and developer velocity. Java and Go dominate in enterprise and high-performance systems. The best choice depends on industry context, but backend developers who master system design principles can transition between languages relatively quickly.

What is the difference between a Backend Developer and a Full-Stack Developer?

A Backend Developer specializes in server-side logic, databases, and API architecture without primary responsibility for the user interface. A Full-Stack Developer works across both frontend and backend, trading depth in either area for broader coverage. Backend Developers typically have deeper expertise in system design, database optimization, and distributed computing.

How important is system design knowledge for Backend Developers?

Critical. Backend Developers are expected to design services that handle failure gracefully, scale horizontally, and maintain data consistency. Understanding load balancing, caching hierarchies, database replication, and message-passing patterns is essential for mid-level and senior roles. System design interviews are standard for backend positions at most companies.

Do Backend Developers need to learn DevOps?

A working knowledge of Docker, CI/CD pipelines, cloud services, and basic infrastructure management is increasingly expected. While dedicated DevOps engineers handle complex infrastructure, Backend Developers should be able to containerize their services, configure deployment pipelines, and debug production issues independently.

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