We source, vet, and manage hiring so you can meet qualified candidates in days, not months. Strong English, U.S. time zone overlap, and compliant hiring built in.
.svg){kind=logo}
Fiber is a lightweight, high-performance web framework for Go designed to simplify building REST APIs and microservices with minimal overhead. Released in 2018 and maintained actively, Fiber offers Express.js-like syntax and routing but runs on Go's Fasthttp HTTP engine, delivering extraordinary performance (orders of magnitude faster than standard Go net/http). It's purpose-built for teams that need maximum throughput, minimal latency, and resource efficiency.
Fiber abstracts away the complexity of setting up a high-performance HTTP server in Go, providing built-in support for middleware, routing, validation, logging, and error handling. Unlike frameworks like Gin or Echo (which use the standard library), Fiber uses Fasthttp for dramatically lower memory allocation and faster request handling. It's especially popular for building API gateways, real-time backends, and microservices where throughput and latency matter. Companies like IBM, Stripe, and many fintech platforms use Fiber or similar frameworks for performance-critical infrastructure.
The ecosystem is maturing: Fiber has 28k+ stars on GitHub, active development, and a growing community. Common use cases include high-volume API servers, WebSocket-based real-time systems, and low-latency financial or IoT backends. LatAm adoption is growing as more teams migrate from Express.js or Python Flask to Go for backend infrastructure.
Hire a Fiber developer if you're building a REST API or microservice that needs to handle high throughput with minimal latency, or if you're scaling from Node.js/Python/Ruby and hitting performance ceilings. Fiber is ideal for teams that have Go skills and want the convenience of a batteries-included framework, or for companies migrating from Express.js to Go and wanting familiar routing patterns.
Real-world scenarios: building an API that handles 10k+ requests per second, creating a message queue consumer, implementing an API gateway, or developing real-time notification infrastructure. If your service is latency-sensitive (financial transactions, real-time dashboards, IoT data ingestion), Fiber's performance characteristics make it compelling.
You should NOT choose Fiber if you're not comfortable with Go, if your team is primarily Node.js or Python (and has no Go expertise), or if your API serves infrequent traffic where performance isn't a constraint (use Express.js or Flask). Fiber's advantage only matters if you have significant scale. Also, Fiber is opinionated about HTTP handling, so it's less suitable for projects requiring fine-grained control over the HTTP layer (though possible with middleware).
Strong team compositions pair Fiber developers with Go infrastructure engineers (DevOps, Kubernetes), frontend developers (React, Vue, or mobile), and database specialists (PostgreSQL, Redis optimization). QA and load testing expertise is valuable since Fiber projects often deal with performance constraints.
Look for developers with solid Go fundamentals and hands-on HTTP/REST API experience. Must-haves include experience building servers (Fiber, Gin, Echo, or net/http), understanding of middleware patterns, and knowledge of concurrency in Go (goroutines, channels). Red flags include developers who've only learned Fiber without understanding Go's underlying HTTP mechanics, or who can't articulate why they'd choose Fiber over another framework.
Nice-to-haves include experience with high-performance systems, database optimization, caching (Redis), message queues (RabbitMQ, Kafka), Docker/Kubernetes for deployment, and familiarity with WebSocket handling or real-time systems. TypeScript/Go crossover experience (some developers move from Node.js to Go) is valuable. Experience with load testing and profiling Go applications is a plus.
Junior (1-2 years): Comfortable with Go basics and can build a simple Fiber app with routing, middleware, and basic validation. Understands request/response handling and simple error management. Limited experience with scaling or complex systems. Needs guidance on architecture and production concerns.
Mid-level (3-5 years): Strong Go fundamentals with production experience. Can design scalable API architectures, handle middleware correctly, integrate with databases, and manage concurrency. Understands performance optimization, caching strategies, and how to debug production issues. Can work independently on feature ownership.
Senior (5+ years): Deep knowledge of Go and high-performance systems. Can architect complex microservices, optimize for throughput and latency, mentor junior developers, and make decisions about Fiber vs alternatives. Experienced with infrastructure concerns (load balancing, monitoring, observability). Often leads technical decisions on database design, caching layers, and API contracts.
Soft skills: microservice architectures require clear communication about API contracts and dependencies. Look for developers who document decisions and think about operational concerns (logging, monitoring, alerting). Remote work is standard in Go teams.
1. Walk us through a high-traffic service you built. What were the bottlenecks and how did you solve them? What you're testing: Production experience at scale. Strong answers mention specific challenges (database queries, memory leaks, connection pooling) and how they profiled and fixed them. This separates real engineers from tutorial developers.
2. Tell us about a time you had to debug a subtle concurrency bug in Go. What you're testing: Do they understand Go's concurrency model deeply enough to troubleshoot race conditions? Strong answers show systematic debugging approach and understanding of goroutine synchronization.
3. Describe your experience with microservice architecture. How do you handle inter-service communication and failure scenarios? What you're testing: Most Fiber projects exist in microservice ecosystems. They should understand API contracts, retry logic, circuit breakers, and degradation. Strong answers show they've dealt with distributed system challenges.
4. How do you approach API versioning and backward compatibility in a production service? What you're testing: Long-lived services require thinking about contract evolution. Strong answers show thoughtfulness about deprecation, versioning strategies, and managing client expectations.
5. Tell us about your experience with monitoring and observability in production Go services. What you're testing: Operational maturity. They should understand structured logging, metrics collection (Prometheus), and tracing. Strong answers mention specific tools and how they've debugged production issues.
1. Design a high-throughput REST API for an event streaming system. How would you structure the code, handle concurrency, and manage database connections? Evaluation: Look for understanding of middleware, request handling, connection pooling, and Go's concurrency patterns. A strong answer sketches out the handler structure, mentions database connection management, and considers error handling. They should explain their reasoning for Fiber specifically.
2. Explain the difference between Fiber's Fasthttp and Go's standard net/http. Why does this matter? Evaluation: Strong answer explains that Fasthttp reuses byte buffers and reduces allocations, which dramatically improves performance. They should understand the trade-offs (slightly different semantics, less ecosystem compatibility) and when it matters.
3. Design a system for handling real-time WebSocket connections in Fiber. How would you broadcast messages to multiple clients? Evaluation: Looking for understanding of WebSocket handling, concurrent message sending, and Go's channels for pub/sub patterns. Strong answers mention goroutines, channel patterns, or external systems like Redis for multi-instance broadcast.
4. How would you implement rate limiting and caching in a Fiber application? Walk through the middleware design. Evaluation: This is a real-world concern. Look for understanding of middleware order, cache invalidation, and distributed caching (Redis). Strong answers mention specific approaches (token bucket, sliding window for rate limiting) and libraries or custom implementations.
5. Describe your approach to testing a Fiber application. How do you test HTTP handlers, middleware, and integration scenarios? Evaluation: Many Go developers skip testing. Strong answers mention unit testing handlers with testify or similar, integration testing with test databases, and understanding of table-driven tests. They should be comfortable with Go's testing package and mocking strategies.
Build a REST API for a task management system that: Handles CRUD operations on tasks, includes middleware for authentication (JWT), implements pagination, and integrates with a database (PostgreSQL or SQLite). The candidate should write handlers, middleware, validation, and explain their approach to testing and error handling. Bonus: Add caching for frequently accessed data or rate limiting. Time: 3-4 hours. Scoring: API design (5 pts), routing/middleware (5 pts), database integration (5 pts), error handling (3 pts), code quality and testing (2 pts).
Fiber developers in Latin America typically command mid-to-senior Go developer salaries, reflecting the specialized knowledge required:
- Junior (1-2 years): $32,000-$48,000/year - Juniors with Go experience are less common than web framework juniors; expect some Node.js or Python background.
- Mid-level (3-5 years): $50,000-$75,000/year - The most common level in LatAm Go market. Mid-level developers are in high demand for microservice teams.
- Senior (5+ years): $78,000-$120,000/year - Experienced Go developers command premium rates, especially those with Fiber or high-performance systems experience.
- Staff/Lead (8+ years): $130,000-$180,000/year - Rare in LatAm. Usually hired for infrastructure or architecture leadership.
By comparison, US-based Fiber developers (mid-level) cost $100k-$150k/year, making LatAm hiring 40-50% cheaper. Brazil, Colombia, and Argentina have growing Go communities, though smaller than Node.js or Python communities. Rates reflect Go's positioning as a specialized language for infrastructure and high-performance systems.
Latin America has a growing Go ecosystem, particularly in Brazil (Sao Paulo has active Go meetups), Colombia (Medellin), and Argentina. The community is smaller than Node.js but highly engaged. LatAm developers transitioning from Node.js to Go bring full-stack perspective and understand both worlds.
Time zone overlap is excellent: most Go developers in LatAm work UTC-3 to UTC-5, giving you 6-8 hours of real-time overlap with US East Coast teams. Go development benefits from synchronous communication for architecture discussions and debugging. LatAm developers have strong English proficiency and are accustomed to remote work.
Cost efficiency is substantial. A mid-level Fiber developer in Brazil or Colombia costs $50k-$75k/year versus $100k-$150k in the US, a savings of 40-50%. Senior developers show similar savings. Because infrastructure projects have long timelines, you benefit from developers who stay in roles longer. LatAm Go developers tend to have low churn.
Cultural fit: LatAm engineers understand North American engineering practices, value code quality and documentation, and are accustomed to operational responsibility (many have DevOps or full-stack backgrounds). This reduces friction when working on shared infrastructure.
South's process for Fiber hiring starts with understanding your infrastructure needs (API gateway? Microservice? Real-time system?), then matching you with Go developers experienced in Fiber or similar frameworks from our pre-vetted network across Brazil, Colombia, Argentina, and Mexico. Every developer has been screened for Go fundamentals, API design experience, and production shipping history.
Interview your candidates directly. Once selected, South handles compliance, benefits, equipment, and payroll via local entities so you don't manage LatAm labor law. We provide close support during the first month to ensure smooth integration. If a hire isn't working out within 30 days, South replaces them at no extra cost: our 30-day replacement guarantee.
You maintain full control: the developer reports to you and integrates into your engineering team. South manages operations in the background. Ready to hire a Fiber developer to scale your infrastructure? Let's talk.
Fiber is used to build high-performance REST APIs, microservices, API gateways, and real-time backends in Go. It's ideal for teams that need to handle high throughput with minimal latency, or for companies scaling from Node.js/Python to Go. Common uses: payment processing APIs, message queues, WebSocket servers, IoT data ingestion, and internal infrastructure services.
All three are solid frameworks. Fiber is the fastest and most like Express.js. Gin is the most mature and popular in LatAm. Echo sits in the middle. Choose Fiber if raw performance is critical and you're comfortable with Fasthttp's semantics. Choose Gin if you want battle-tested stability and a large ecosystem. Choose Echo if you want a balance. For most teams starting out with Go, Gin is the safest choice; Fiber for performance-critical systems.
Absolutely. It's actively maintained, has a growing ecosystem, and companies use it for production infrastructure. That said, it's newer than Gin and Echo, so the ecosystem is smaller. If you need maximum battle-tested stability, Gin has a longer track record. For new projects with performance requirements, Fiber is the right choice.
Possible but not recommended. Fiber requires solid Go fundamentals because Fasthttp has slightly different semantics than standard net/http. Teams new to Go should start with Gin or Echo (which use standard net/http) and migrate to Fiber later if needed. Go has a learning curve, and Fiber adds another layer of complexity.
Mid-level Fiber developers cost $50k-$75k/year in Brazil, Colombia, and Argentina. Senior developers cost $78k-$120k/year. This is 40-50% less than equivalent US talent. Rates vary by country and experience level. South can match your budget to the right seniority.
Typically 10-14 days from initial conversation to offer. Go developer pools are smaller than Node.js, but South's pre-vetting accelerates the process. We'll match you with 2-3 strong candidates, you interview, and South handles the rest.
A strong mid-level developer (3-5 years of Go experience) can build a robust API independently. You'll want a senior if you're designing complex infrastructure, scaling across multiple services, or dealing with performance optimization at extreme scale. Most teams benefit from at least one senior architect to guide architecture decisions.
Most Fiber developers on South's network are in UTC-3 to UTC-5 (Brazil, Argentina, Colombia). This provides 6-8 hours of real-time overlap with US East Coast teams. For US West Coast, expect 3-5 hours of overlap. Async communication is standard but synchronous time is valuable for architecture discussions.
All Go developers in our network complete a technical screening including Go fundamentals, API design questions, and a code review or take-home exercise. We verify production shipping experience through portfolio review and reference checks. We also assess communication and architectural thinking, critical for infrastructure work.
If there's a mismatch in the first 30 days, South replaces the developer at no extra cost. Our goal is to match you with someone who delivers. After 30 days, standard employment arrangements apply. Communication and cultural fit issues are rare because we vet for these upfront.
Yes. South manages all local payroll, taxes, benefits, equipment, and regulatory compliance in each country. You don't interact with LatAm labor law or tax authorities. We handle everything so you can focus on building.
Absolutely. Many teams hire 2-3 Go developers (one senior architect, one-two mid-level), often paired with DevOps engineers, frontend developers, and data engineers. South can help staff an entire infrastructure team. Discuss your needs and we'll help structure the team.
Go (Golang) - Fiber is a Go framework. Developers need strong Go fundamentals to use Fiber effectively.
PostgreSQL - Most Fiber projects integrate with PostgreSQL. Database design and optimization knowledge is valuable.
Kubernetes - High-performance Go services often run in Kubernetes. DevOps knowledge is common in Fiber teams.
Node.js - Developers transitioning from Node.js often learn Fiber. If you're migrating infrastructure, pairing Fiber developers with Node.js engineers helps.
