Senior Java/J2EE Engineer

Senior Java/J2EE Engineer – Telecom Billing amp; API
Location: Denver, CO
Work Model: Onsite, 5 days a week
Required Skills
Strong Java/J2EE development experience.
Strong Spring Boot and Microservices experience.
Hands-on REST API design and development.
Strong understanding of OpenAPI/Swagger and YAML.
Experience with API Management/API Gateway, preferably Apigee.
Strong understanding of telecom billing and commercial business logic.
Experience with pricing, rate plans, discounts, credits, adjustments, offers and promotions.
Experience handling billing/pricing exceptions and overrides.
Strong analytical and mathematical/problem-solving skills.
AWS experience.Docker and Kubernetes.
CI/CD and GitLab.
API security concepts such as OAuth2, JWT and authentication/authorization.
Practical experience with Claude, Claude Code, GitHub Copilot or similar AI coding tools.
Preferred / Good-to-Have Skills
Hands-on Claude/Claude Code experience.
Experience using AI tools for frontend/UI development.
NextJS / React experience.AWS Bedrock / Generative AI experience.
Kafka and event-driven architecture.
Experience with telecom/wireless platforms such as billing, charging, product catalog, order management or customer management systems.
Experience working with complex pricing and promotion engines.
Ideal Candidate Profile
The ideal candidate is a strong Senior Java/API Engineer first, with meaningful telecom commercial/billing knowledge and practical experience using AI-assisted development tools.
We are not looking for someone who only builds APIs from requirements provided by others.
The candidate should be able to understand and reason about the underlying business logic around pricing, billing, discounts, credits, offers and exceptions, and translate that logic into scalable technical solutions.
Claude/Claude Code experience is important and should be actively validated during screening, particularly where the candidate has used AI to accelerate development or build frontend/U