Java Software Engineer Contract Jobs in Ansonia, CT

Role Summary:
The Staff Software Engineer will be a high-velocity full-stack builder for the new Product Engineering team, predominantly focused on delivering elite frontend interfaces while possessing the backend capability to ship end-to-end features. This is a 100% builder role meant for an engineer who excels at bridging complex data structures with resilient, highly secure user experiences. You will own the implementation of real-time UI components built predominantly using Angular and TypeScript. You will be responsible for enforcing a clean, feature-domain driven architecture and hardening the API integration layer to ensure absolute security and reliability as our products pivot to an agentic future.

Key Responsibilities:

• Feature Delivery: Own features from the database to the browser. While your primary focus is crafting world-class UIs, you will actively write and modify backend services to support user-facing workflows and real-time streaming components.
• Modular & Domain Driven Architecture: Design and enforce a clean Angular module-based architecture organized by feature-domains, ensuring the frontend codebase remains scalable, decoupled, and highly maintainable as the product line expands.
• API Integration: Implement and harden enterprise-grade API integrations. Design robust interceptor patterns for request/response handling, custom error capturing, and secure multi-tenant auth/session state management.
• Streaming & Complex State Orchestration: Architect real-time asynchronous UI modules using advanced state management libraries to seamlessly handle heavy data feeds, WebSockets, Server-Sent Events (SSE)
  Global Readiness & Performance Optimization: Own internationalization (i18n/localization) workflows across screens, and leverage Progressive Web App
  (PWA) patterns and service workers to optimize offline resilience and caching
  strategies.
• Microservices: Architect and develop high-concurrency backend services in
  Python (FastAPI/Django) to handle core business logic and complex workflows
  AI-Native SDLC: Actively utilize autonomous coding agents to plan, generate, and
  test front-end and backend code, maintaining high velocity while ensuring code
  quality through agent-assisted peer reviews.
• Security & Auth: Own the implementation of secure authorization protocols (JWT,
  OpenID Connect) to ensure that both humans and AI agents operate within strict
  permission boundaries.
• Performance Optimization: Monitor and optimize API latency and database query
  performance (PostgreSQL/MS SQL) to support real-time interaction for both
  web/mobile apps and high-frequency agent

Skills and Experience:

• 7-8+ years of professional full-stack software engineering experience with a stellar track record of shipping production-grade commercial web applications.
• Expert-level proficiency with Angular and TypeScript as your primary engineering stack. Strong secondary experience with modern React architectures is highly valued.
• Deep experience with Angular module-based architecture, feature-domain organization, and hands-on mastery of modern state management libraries. Strong knowledge of HTTP/API patterns, secure auth/session handling, and advanced interceptor design for resilient request/response processing.
• Practical experience with enterprise UI frameworks (Angular Material, Bootstrap), custom component libraries, and localization/internationalization (i18n) workflows. Solid understanding of PWA behavior, service worker lifecycles, and advanced caching mechanics in Angular applications.
• Strong SQL skills (PostgreSQL/MS SQL) and production experience with OAuth2/JWT for secure service-to-service communication.
• Practical, hands-on experience building or modifying backend microservices and APIs (e.g., Python, Node.js, or Java. Python preferred). Comfortable navigating databases, routing logic, and data schemas.
• Demonstrated proficiency in using coding agents to accelerate the SDLC and plan and code complex engineering tasks.

RB Global (NYSE: RBA)

RB Global (NYSE: RBA) (TSX: RBA) is a leading, omnichannel marketplace that provides value-added insights, services and transaction solutions for buyers and sellers of commercial assets and vehicles worldwide. Through its auction sites in 13 countries and digital platform, RB Global serves customers in more than 170 countries across a variety of asset classes, including automotive, commercial transportation, construction, government surplus, lifting and material handling, energy, mining and agriculture.

The company's marketplace brands include Ritchie Bros., the world's largest auctioneer of commercial assets and vehicles offering online bidding, and IAA, a leading global digital marketplace connecting vehicle buyers and sellers. RB Global's portfolio of brands also includes Rouse Services, which provides a complete end-to-end asset management, data-driven intelligence and performance benchmarking system; SmartEquip, an innovative technology platform that supports customers' management of the equipment lifecycle and integrates parts procurement with both OEMs and dealers; Xcira, a leader in live simulcast auction technologies; and Veritread, an online marketplace for heavy haul transport.

RB Global full-time employees are offered medical, dental, vision, and basic life insurances. Employees are able to enroll in our company's 401k plan and RB Global will match 100% for the first 4% contributed.  Employees will also receive 15 days of PTO each year.