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Backend Engineer

A Backend Engineer builds the servers, APIs, and databases that power applications behind the scenes. They design data models, write business logic, secure and scale services, and keep systems fast and reliable. The role focuses on the hidden machinery that stores data, enforces rules, and serves every request the frontend and other systems make.

Responsibilities

Design and build APIs and backend services
Model data and manage databases
Implement business logic, auth, and security
Scale systems for performance and reliability
Write tests and monitor services in production
Collaborate with frontend and product teams

Must-have skills

Strong skills in a backend language (Python, Go, Java, Node)
API design (REST or GraphQL)
Databases: SQL and often NoSQL
Understanding of authentication and security
Testing and debugging in production systems

Nice-to-have skills

Cloud services and containers
Message queues and event-driven design
Caching and performance tuning
Microservices architecture

Average Salary

Typical US base salary for an HR Generalist by experience level.

Junior

0–2 yrs experience

$90,000 – $115,000
US annual salary (USD)

Intermediate

0–2 yrs experience

$115,000 – $150,000

US annual salary (USD)

Senior

0–2 yrs experience

$150,000 – $200,000

US annual salary (USD)

Figures are annual US market estimates for orientation, not offers. Actual pay varies by location, company stage, and equity.

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Frequently asked questions

What does a Backend Engineer do?
They build the server-side of applications: APIs, databases, business logic, and the systems that keep everything fast, secure, and reliable.
Which language is best for backend development?
There is no single best choice. Python, Go, Java, C#, and Node.js are all widely used. The right one depends on the company and problem.
Backend vs Full Stack Engineer: what is the difference?
Backend Engineers specialize in server-side systems. Full Stack Engineers work across both backend and frontend, trading some depth for breadth.
Do Backend Engineers work with databases?
Yes, constantly. Data modeling, queries, and database performance are core parts of the job.

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