Senior Software Engineer (Java) - Remediation Agent

Sonar • Geneva, IL

12d • Onsite

About The Position

At Sonar, we believe that simply reporting code issues is not sufficient. To truly level up the quality of the world's software, we must empower millions of developers to fix them automatically. With over 400,000 enterprises relying on our products, we hold a unique lever to shape how software is built. Recent breakthroughs in AI have made autonomous remediation a reality, but one major hurdle remains: Trust. Generative AI makes mistakes, and enterprises cannot automate what they do not trust. This is where you come in. As a Senior/Staff Engineer, you will architect the backend for Verified Autonomous Remediation, a sophisticated Agentic workflow that doesn’t just generate code, but rigorously tests and validates it using Sonar’s analysis engine. You will tackle the hard engineering problems required to close the "Trust Gap."

Requirements

• You have 8+ years of experience building scalable resilient systems.
• You are strong in AWS architecture and know how to design for high availability and low latency with cost in mind.
• You are comfortable operating in a hybrid environment: Java for deep integration with the Core Sonar analysis engine and Python for the AI/Agent reasoning layer. You should be strong in one and capable in the other.
• We make use of various LLM tools, and are looking for people not afraid of different languages.
• You understand that "AI" in production is mostly "Systems Engineering."
• You know how to handle asynchronous event-driven architectures, manage queues, and design sandboxed execution environments to run untrusted code safely.
• You have practical experience building applications that orchestrate LLMs (OpenAI, Anthropic, or hosted open models).
• You understand the backend complexity of RAG, context window management, and prompt engineering at scale.
• You care about the "Why."
• You want to build telemetry pipelines that distinguish between "Bad UX" and "Bad Code," focusing on the metrics that matter.

Responsibilities

• Architect the "Unified Remediation Engine". You will design the high-throughput decision logic that powers our remediation efforts.
• You will build the backend services that intelligently route requests between deterministic instant QuickFixes, LLM-based reasoning fixes, and complex Agentic flows.
• Build Robust Agent Architecture. You will contribute to the Sonar Remediation Agent code, transitioning research concepts to a resilient, high-scale production service.
• You will implement self-healing workflows where the Agent iteratively fixes the code it produces until the build is green.
• Solve the "Sandboxing" Problem. You will architect the secure execution environments required to run untrusted, AI-generated code.
• You will design the isolation layers that allow Agents to iterate on code improvements without compromising our infrastructure.
• Engineer for Reliability & Safety. You will implement critical safety mechanisms, like Circuit Breakers to automatically reroute requests to the proper engine when acceptance rates drop.
• Crucially, you will own the cost/performance trade-off, ensuring our AWS architecture scales to millions of events without letting token costs spiral.
• Act as a Technical "Force Multiplier". Beyond building systems, you’ll mentor the squad through design reviews and collaborate with the Research team to ensure our agent is not just state-of-the-art, but production-safe.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed