Software Developer

Senior Backend Engineer
Location: Remote (Must be based in Denver, CO; Northern VA; or Austin, TX for occasional office visit)
Duration: 6-Month Contract (High likelihood of extension or conversion)
Pay Rate: $70/hr.-$90/hr. (depending on experience)
Work Authorization: U.S. Citizen required (Federal project)

Overview
We are seeking a Senior Backend Engineer (GoLang and either Java or .NET background) to architect and build a scalable backend integration service layer for a complex, enterprise-grade platform. This role is highly technical and hands-on, with a strong focus on system design, API development, and integration architecture.
You'll play a key role in shaping backend services, driving architectural decisions, and building high-performance integrations across multiple systems. This is an ideal opportunity for someone who thrives in designing clean, scalable systems and enjoys working on complex B2B applications.

Key Responsibilities
Architecture & Integration Development

• Design, build, and maintain backend integration services using GoLang
• Develop scalable integration frameworks including event-driven architecture, caching layers, and observability
• Define API contracts, data models, and integration patterns (REST, async, pub/sub)

Technical Leadership

• Partner with engineering leadership to define backend architecture and roadmap
• Drive decisions around scalability, performance, fault tolerance, and service design
• Advocate for clean architecture and domain-driven design principles

AI-Assisted Development

• Utilize AI tools for code generation, testing, and documentation
• Establish best practices for AI-assisted development workflows
• Ensure code quality, security, and compliance through proper review processes

Delivery & Operations

• Build resilient, observable systems with logging, monitoring, and alerting
• Develop automated testing strategies (unit, integration, contract, performance)
• Collaborate with DevOps teams on deployment, scaling, and performance tuning

Collaboration & Mentorship

• Work closely with Product and Engineering teams to translate requirements into technical solutions
• Conduct code reviews and mentor engineers on backend best practices and Go development

Qualifications
Required:

• 5+ years of experience building APIs and complex B2B web applications
• 3+ years of hands-on GoLang development experience
• Background in .NET or Java development
• Strong experience with backend integration and system architecture
• Advanced SQL skills and experience with relational databases
• Hands-on experience building identity, access management, or SSO/IDP solutions
• Deep understanding of OIDC, OAuth 2.0, SAML 2.0, JWT, PKCE, etc.
• Security minded (e.g., authentication services, attack vectors and mitigations)
• Experience with ERP systems and business integrations
• Deep understanding of REST APIs, web services, and integration patterns (webhooks, messaging, event-driven systems)
• Experience with microservices or modular architectures
• Strong communication skills and ability to work in a remote environment
• Bachelor's degree in Computer Science or related field

Preferred:

• Experience with Keycloack or similar open-source identity platforms
• Experience supporting multi-tenant SaaS platforms at scal
• Experience with integration platforms, SDKs, or developer-facing APIs
• Familiarity with Docker, Kubernetes, and AWS
• Experience with contract testing, API testing, and performance testing tools
• Experience working in Agile environments (Scrum/Kanban)

Additional Notes

• Fully remote, with occasional onsite visits as needed
• Must be located in Denver, CO; Northern Virginia; or Austin, TX
• U.S. Citizenship required