Ryz Labs/Hire/Full stackHire senior back-end developers for reliable systems
Senior back-end engineers from Latin America who build APIs, data models and services that stay up under load, working in your stack on US hours.
By the Ryz Labs team · Updated October 2026
Hiring back-end developers through Ryz Labs gets you senior engineers who design services, data models and APIs that hold up in production. They are vetted, in the top 1% of the engineers we interview, and they embed in your team: your repos, your on-call rotation if you want it, your standups. They work within an hour of US time zones.
What our back-end developers work on
Back-end work is where reliability, data integrity and cost are decided. Our back-end engineers write in Java, Go, Python, Node.js, C# or Ruby depending on your stack, and they spend most of their time on the parts of a system that are hard to change later.
- APIs and service design: REST, GraphQL and gRPC services, API gateways, and contracts other teams can depend on.
- Data layer work on PostgreSQL, MySQL, DynamoDB or MongoDB, including schema design, query tuning and partitioning.
- Event-driven systems with Kafka, RabbitMQ, SQS and SNS, or Google Pub/Sub, including outbox patterns and consumers that tolerate duplicates.
- Monolith decomposition: pulling services out of a large application in stages, with clear boundaries and shared data handled carefully.
- Integrations with payment providers, ERPs, CRMs and third-party APIs, including webhooks, retries and reconciliation.
- Back ends for AI systems: the services, queues and storage that sit around model calls, retrieval and evaluation.
- Reliability work: observability with OpenTelemetry, Prometheus and Grafana, SLOs, load testing and incident follow-ups.
Skills we vet for
- Depth in one back-end language, such as Java with Spring Boot, Go, Python with FastAPI or Django, Node.js with NestJS, C# with ASP.NET Core, or Ruby on Rails.
- Database design: normalization and when to break it, indexing strategy, isolation levels, locking behavior and reading query plans.
- Distributed systems basics: idempotency, retries with backoff and jitter, timeouts, circuit breakers and eventual consistency.
- Messaging: at-least-once delivery, ordering guarantees, dead-letter queues and the transactional outbox pattern.
- Caching: cache-aside, write-through, invalidation, stampede protection and Redis data structures.
- Security: authentication and authorization, OWASP API risks, secrets management and least-privilege access in the cloud.
- Cloud and containers: Docker, Kubernetes or ECS, managed databases, and infrastructure as code with Terraform.
- Testing: integration tests with Testcontainers, contract tests between services, and load testing with k6 or Gatling.
How we vet back-end developers
Our recruiters source back-end engineers across Latin America with production systems behind them. ARC, our in-house system, ranks the pipeline. Candidates complete structured NTRVSTA AI interviews that cover system design, data modeling and the language you use. Recruiters review each candidate before and after, and we send you a curated shortlist. AI scores are advisory. Humans make the decisions.
Sample interview topics
- Design an endpoint that accepts payments from mobile clients on unreliable networks. How do idempotency keys work, where do you store them, and what happens if the client retries during processing?
- A service writes to Postgres and then publishes an event to Kafka, and sometimes the event is lost. Explain the dual-write problem and how the transactional outbox pattern or change data capture solves it.
- A query that took 20 ms now takes 4 seconds after the table grew. Walk through reading EXPLAIN ANALYZE output, and discuss index choice, statistics, and when a composite or partial index helps.
- Your service calls a slow downstream API. How do you set timeouts, retries and a circuit breaker so one bad dependency does not take down everything else?
- A popular cache key expires and hundreds of requests hit the database at once. Explain the cache stampede and describe at least two ways to prevent it.
Ways to hire back-end developers
| Option | Best for | Trade-offs |
|---|
| Freelance marketplace | A defined integration or a small script | Hard to assess system design skill; risky for code you will run for years |
| Staffing or recruiting agency | Permanent back-end hires on your own payroll | Language keyword matching; system design rarely tested; placement fees |
| In-house recruiting | Core platform owners and long-term architects | Long searches; senior back-end talent is in demand across every industry |
| Ryz Labs staff augmentation | Adding senior back-end engineers to your platform or product teams | Custom quote, scoped per team; your architects keep ownership of design |
| Ryz Labs AI pod team | Building AI systems with their supporting services inside your cloud | A dedicated multi-person pod; suited to a defined AI initiative |
Ryz is not the right fit if you need follow-the-sun support from engineers in Europe and Asia, or want published pricing before a conversation. If you need engineers as your own employees with benefits, an employer-of-record partner fits better.
Why hire back-end developers from Latin America
Latin America's largest tech employers include fintechs, marketplaces and logistics companies that run serious back-end infrastructure at regional scale. Engineers who have built payment systems, high-volume APIs and event pipelines there bring that experience to US teams, along with years of working with US companies directly.
Back-end incidents and design reviews both reward real-time collaboration. With our engineers working within an hour of US hours, an outage at noon Eastern has the right people online, and an architecture discussion does not have to wait a day for the other side to wake up.
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FAQ
Which back-end languages do you cover?
Java, Go, Python, Node.js and TypeScript, C# and .NET, Ruby, PHP and Kotlin are all common. We shortlist for your language and frameworks, not a generic back-end profile.
Can your back-end developers join our on-call rotation?
Yes, if you want them to. Because they work within an hour of US hours, they fit into business-hours rotations easily. We agree on the details with you up front.
What does hiring back-end developers through Ryz cost?
It is a custom quote, scoped per team. You get a plan, a price and the names of the people before you sign.
Who holds the contract?
You sign one contract with Ryz. Our engineers work with us as independent contractors, and we handle paying them. Day to day, they work inside your team on US hours.
Questions we didn't answer? Email info@ryzlabs.com.