Senior Core Systems Engineer – AI‑Driven Backend

Avaya; United States; On-site; USD 179,000 - 234,000; Full time

Job summary

Avaya is seeking a hands-on software engineer with strong system design and server-side expertise to work across a complex enterprise platform. You will turn goals into designs, implement critical functionality, and drive testing, deployment and production operations.

You will explore unfamiliar codebases, trace issues across services, and leverage AI tooling to prototype and validate approaches. Strong collaboration and deep technical judgment are expected.

Qualifications

• Substantial hands-on software engineering experience with ownership of production systems.
• Strong system design: interfaces, data flows, scalability, security and maintainability.
• Experience with distributed systems, concurrency, asynchronous communication and recovery.
• Backend skills in Go, Rust, Node.js/TypeScript or Java with debugging and performance work.
• Experience with databases, caching, cloud platforms, containers and messaging tech.
• Proficient in automated testing, deployment, observability and production troubleshooting.
• Proficient use of AI coding agents and ability to verify results.
• Curiosity to learn unfamiliar tech and collaborate across teams.

Responsibilities

• Design across component boundaries, define interfaces, and evaluate tradeoffs.
• Build robust server-side software with correctness, performance and security.
• Investigate end-to-end by tracing requests across components.
• Prototype using AI tools, compare approaches and validate feasibility.
• Move between design and code; write critical implementation and tests.
• Use AI agents effectively; assign tasks, provide context, review changes.
• Learn unfamiliar systems via code, docs, experiments and collaboration.
• Evolve software for maintainability, delivery speed and risk management.
• Contribute across API, client integrations and UI when needed.
• Provide hands-on technical leadership and mentor peers.

Skills

Go, Rust, Node.js/TypeScript, Java

System design

Distributed systems

Backend engineering

Databases & caching

Cloud platforms & containers

Kafka / NATS

AI coding agents

Cross-team collaboration

Debugging & performance analysis

Education

Bachelor's degree in Computer Science or Engineering

Job description

Avaya is seeking a hands-on software engineer with strong system design and server-side expertise to work across a complex enterprise platform. You will turn goals into designs, implement critical functionality, and drive testing, deployment and production operations.

You will explore unfamiliar codebases, trace issues across services, and leverage AI tooling to prototype and validate approaches. Strong collaboration and deep technical judgment are expected.