Job Title: Backend Java Developer
Location: Irving, TX(Remote)
Duration: 24 Months + Extension
Bill Rate: $84/hour (C2C)
Job Type: W-2, 1099, C2C
Client: To Be Discussed Later
Work Authorization: US Citizen, Green Card, OPT-EAD, CPT, H-1B, H4-EAD, Other

Job Description:

We are looking for a senior backend engineer with complex async integration experience who can own a vertical slice end-to-end—from API contracts down to stored procedures—cross language boundaries when needed and grow into the broader platform.

Core Requirements:

Backend Java: Deep familiarity with the core provisioning stack, including:
Spring Boot / Spring Framework: Dependency injection, service-layer architecture, and configuration management.
Spring MVC / REST controllers: Building and consuming RESTful endpoints, request/response modeling, and error handling.
JAX-WS or Spring-WS: SOAP service consumption and integration across internal service hops.
Spring Data JDBC / JPA or raw JDBC: Database access patterns, transaction management, and stored procedure execution.
Maven or Gradle: Build tooling, dependency management, and multi-module project structures.
JUnit / Mockito: Unit/integration testing and mocking external dependencies in complex flows.
Java concurrency fundamentals: Thread safety and async callback correlation across long-lived request chains.
Logging / observability: Structured logging (SLF4J/Logback) and distributed tracing for triage and debugging.
T-SQL / MSSQL: Stored procedures, schema migrations, query optimization, concurrent safety, and idempotent migration patterns.
Distributed Systems / Async Patterns: Experience with callback-driven flows across multiple hops, including correlation, ordering, and failure modes in async chains.
Couchbase / Elasticsearch: Understanding cache consistency implications for critical writes during the provisioning flow.
Integration Debugging: Ability to trace failures across system boundaries using logs and callbacks involving multiple external systems.
Security Awareness: Proactive identification of exposure risks when handling sensitive credentials across service hops.

Nice to Have:

.NET / C#: Ability to read, navigate, and debug C# code (particularly WCF SOAP services and ASP.NET) to triage cross-boundary issues independently.
WCF / SOAP Patterns in .NET: Familiarity with .NET SOAP implementations (service/data contracts, binding configurations) to debug payload mismatches or integration failures.
Telecom / eSIM Domain Literacy: Understanding SIM lifecycle concepts (ICCID, IMEI, profile status, activation codes, eUICC).
SMPP / SMS Messaging: Familiarity with the SMPP protocol, SMS message flows, and gateway architecture.