Go Backend Engineer II — API & Cloud Platform

Optimum; Bethpage (NY); On-site; USD 100,000 - 165,000; Full time

Job summary

Optimum is seeking a Software Development Engineer II in Bethpage, NY to design and implement backend APIs using Go, gRPC, and Protocol Buffers across customer, order, and billing domains. You’ll evolve service endpoints, integrate with legacy systems, and ensure robust testing and deployment in a cloud environment.

Ideal candidates have 3+ years of backend experience, strong Go skills, and familiarity with REST/gRPC APIs, Protobufs, and CI/CD pipelines.

Qualifications

• Bachelor's degree in Computer Science or equivalent experience.
• 3+ years of professional software development experience building and maintaining backend systems or service-oriented applications.
• Strong Go development skills and experience building production backend services.
• Experience designing, building, or consuming REST or gRPC APIs in production environments.
• Working knowledge of Protocol Buffers, contract-first development, and code generation workflows.
• Understanding of service integration patterns, including synchronous communication and messaging approaches such as Pub/Sub or Kafka where applicable.
• Experience with relational or distributed data stores such as Cloud Spanner, and familiarity with caching using Redis.
• Proficiency with Git, code review practices, and GitLab CI or similar CI/CD pipelines.
• Ability to troubleshoot issues across API and service boundaries.

Responsibilities

• Design and implement API capabilities using Go, gRPC, and Protocol Buffers that support business workflows across customer, order, billing, catalog, mobile, and related domains
• Develop and evolve service endpoints, orchestration logic, and integration layers across multiple backend and legacy systems
• Integrate with internal and external systems using established architectural patterns, including SOAP, GraphQL, and enterprise adapter approaches where applicable
• Translate business requirements into Protocol Buffer contracts, Google AIP-aligned API designs, and reliable service implementations
• Expose platform APIs to internal consumer applications through well-defined service and gateway interfaces
• Address error handling, caching, and data consistency concerns across distributed service interactions involving Cloud Spanner, Redis, and related data stores
• Build and maintain automated tests using Go test frameworks to validate service behavior, integration paths, and contract expectations
• Support user-facing feature delivery through stable API contracts and collaboration with presentation-layer engineering teams
• Participate in platform modernization efforts, including migration from legacy integration patterns toward gRPC-based service delivery
• Contribute to code reviews, technical discussions, and continuous improvement of engineering practices within GitLab CI-supported workflows

Skills

Go development

REST APIs

gRPC APIs

Protocol Buffers

Contract-first development

Code generation workflows

Messaging patterns

Troubleshooting API boundaries

CI/CD pipelines

Education

Bachelor's degree in Computer Science or equivalent experience

3+ years professional software development experience

Tools

Cloud Spanner

Redis

Git

GitLab CI

Terraform

SOAP

GraphQL

GCP

AWS

Job description

Optimum is seeking a Software Development Engineer II in Bethpage, NY to design and implement backend APIs using Go, gRPC, and Protocol Buffers across customer, order, and billing domains. You’ll evolve service endpoints, integrate with legacy systems, and ensure robust testing and deployment in a cloud environment.

Ideal candidates have 3+ years of backend experience, strong Go skills, and familiarity with REST/gRPC APIs, Protobufs, and CI/CD pipelines.