Senior Golang developer (10+ yrs, remote interview but day 1 onsite)

Responsibilities

• Design, build, and maintain high-performance, testable microservices and RESTful/gRPCAPIs using standard libraries (net/http) and common frameworks (e.g., Gin, Chi, or grpc-go).
• Implement sophisticated concurrency patterns using goroutines, channels, select, and the sync package (Mutex, RWMutex, WaitGroup) to build massively parallel systems.
• Conduct deep performance analysis and optimization using Go's tooling, especially go tool pprof, to diagnose and eliminate CPU, memory, and I/O bottlenecks.
• Write clean, idiomatic Go, leveraging advanced language features like interfacesfor composition, custom errortypes for robust error handling, andgenerics where appropriate.
• Secure APIs and services usingAWS API Gatewayand custom Lambda Authorizers, ensuring robust authentication and authorization.
• Develop, deploy, and operate all services within Linux-based environments, leveraging a deep knowledge of the OS for performance tuning and troubleshooting.
• Manage infrastructure as code using CloudFormationand maintain robust CI/CD pipelines with GitLab CI/CD.

Qualifications

• 5+ yearsof professional software engineering experience, with a primary focus on backend systems usingGolang.
• 7+ years of hands-on experience with AWS, demonstrating expert-level knowledge in designing, deploying, and managing scalable and secure cloud infrastructure.
• Extensive Golang-Specific Expertise:

o Mastery of Go's concurrency model, including goroutines, channels, the context package, and advanced synchronization primitives in the sync package.

o Deep understanding of the Go runtime, including the scheduler and garbage collector.

o Expert proficiency with Go tooling, including pprof for profiling, go vet for static analysis, and advanced debugging with tools like Delve.

o Experience building robust services with common ecosystem libraries for routing (e.g., Gin, Chi), gRPC (grpc-go), database interaction (sqlx), and testing (testify).

• Cloud & API Proficiency:

o Hands-on experience with AWS API Gateway, including route configuration, rate limiting, and implementing custom authentication with Lambda Authorizers.

o Deep operational knowledge of core AWS services: S3, EC2, ECS, Lambda, RDS, SQS, SNS, CloudWatch, Cloud formation, Load balancer, S3, Lambada, AWS batch, ECS, Route 53, xray.

• Systems & DevOps Skills:

o Strong proficiency in Linux/Unix environments and shell scripting (Bash).

o Experience with CI/CD automation, specifically withGitLab CI/CD.

o Familiarity with enterprise-grade file transfer services like IBM Aspera.

o Experience writing automation tests, preferably with a Python testing suite.