What a backend engineer does
A backend engineer builds the server side of a product: the APIs your apps call, the databases behind them, queues and background jobs, and integrations with payment, email and other services. The job is also to keep all of it secure, fast and reliable as usage grows.
- Designs and builds APIs that web and mobile apps use.
- Models data and writes the queries, migrations and indexes behind it.
- Runs background work with queues and scheduled jobs.
- Integrates third-party services such as payments, email and authentication.
- Adds tests, logging and monitoring, and fixes problems in production.
- Keeps the system secure: access control, input validation and safe handling of secrets.
Skills to look for
A strong backend engineer knows one main language and its ecosystem in depth, designs data and APIs that are easy to change, and has run code in production. These are the skills to check.
- Depth in one main language, such as Python, TypeScript, Go, Java or C#.
- SQL and data modeling in a relational database such as PostgreSQL or MySQL.
- API design: clear endpoints, versioning, pagination and error handling.
- Tests that run in continuous integration, and code reviews.
- Experience with cloud services and containers.
- Security basics: authentication, authorization and protection against common attacks.
Interview questions that show real experience
Good interview questions ask about systems the engineer built and what happened when they grew or failed. These questions show whether someone has run backend code in production.
- Walk me through an API you designed. What would you change now?
- Tell me about a slow query or endpoint you fixed. How did you find the cause?
- How do you change a database schema without downtime?
- Describe an incident in production. What did you change afterwards?
- How do you keep secrets and credentials out of the code?
Good answers name the trade-offs they chose and what they measured. Answers that only list frameworks, with no examples, are a warning sign.
Backend, full-stack or platform engineer?
A backend engineer focuses on the server side: APIs, data and integrations. A full-stack engineer also builds the user interface, which suits small teams that need one person across the product. A platform or DevOps engineer builds the infrastructure the backend runs on: cloud setup, deployment pipelines and monitoring. If your product is growing and the server side is the bottleneck, a backend engineer is the right first hire.
Why Latin America for backend work
Backend work depends on quick answers: a question about an API, a review before a release, a problem in production. Engineers in Mexico City, Bogotá, Lima, Santiago, Buenos Aires and São Paulo work within two hours of New York time all year, so they are online when your team is. See the time zone comparison.
How we help
Tell us about the role. We speak with each engineer about it before we share their profile, and you receive a shortlist of vetted engineers. You only pay when you hire, and if the hire leaves within 90 days, we find a replacement for free.
Questions companies ask
Can a backend engineer also build LLM features?
Often, yes. Most LLM product work sits on the backend: calling model APIs, retrieval over your data, queues and evaluation. Look for someone who has shipped at least one feature like that, or hire an LLM engineer if it is the core of the role.
Can the engineer work as a contractor?
Yes. Boecia Talent recruits for contractor and full-time roles, and each role says which one. The company hires the engineer directly or through an employer of record or contractor platform such as Deel or Remote; Boecia Talent never employs the engineer. More in contractor or employee in Latin America.
Do I pay anything if I do not hire?
No. Companies pay Boecia Talent only when they hire someone it introduced. The fee depends on the role and is given in the quote before any work starts, and a hire who leaves within 90 days is replaced for free.
Related guides
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