Full Stack Software Engineer

SONAR is looking for a Full Stack Software Engineer to help build and optimize the integrations that connect our platform to data partners and customers. You'll own real integration work end-to-end. Designing APIs, wiring up reliable data exchange, and shipping full-stack features on a fast-moving team that leans heavily on modern AI-assisted development.

This is a mid-level role: we expect you to build and ship features independently, and we'll pair you with senior engineers on the harder calls (security, architecture, taking rough prototypes to production). We work remote-friendly across the U.S.; we get together in the Chattanooga office periodically, so occasional travel is part of the job.

• Design, develop, and maintain integrations with data partners and customer systems ensuring reliable data flow and solid API performance.
• Build and optimize RESTful APIs for both internal and external consumers.
• Ship full-stack features with clean, well-tested, well-documented code, working independently on well-scoped work.
• Troubleshoot production issues and improve performance alongside our Dev Ops team.
• Refactor and modernize legacy code to improve maintainability.
• Automate manual, repetitive processes to cut operational overhead.
• Write the validation and verification tests that keep our integrations trustworthy.
• Review teammates' code and give constructive, kind feedback.

How we work (and where you’ll grow)
We build with agentic and spec-driven development as a normal part of the workflow, and a lot of our roadmap starts as fast prototypes sometimes from Product or other teams, not just engineering.

• You’ll use AI-assisted tools day to day and get sharper at them here. Experience with agentic coding tools is a strong plus; a genuine willingness to learn them well is a requirement.
• You’ll help turn rough, agent-generated prototypes into production-quality code and you’ll learn our bar for readability, extensibility, and security by pairing with senior engineers who do this constantly. Early on you’ll do this with guidance; over time you’ll own more of it.
• Working in a large, real-world (brownfield) codebase with these tools is a plus if you’re strong on the fundamentals.