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.

What you'll be doing:

• 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 DevOps 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.

• All other duties as assigned.

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.

What you bring:

• 4+ years of software engineering experience, as a full-stack developer or similar.

• Solid C# and working proficiency in (or eagerness to ramp on) Go.

• Front-end fundamentals: HTML, CSS, JavaScript and hands-on experience with a modern framework (Vue or React; we use Vue).

• PostgreSQL and relational database design.

• Building and consuming RESTful APIs.

• A cloud-first mindset; comfort building and running apps in a cloud environment.

• Strong fundamentals in version control (Git), testing, and documentation.

• Curiosity about AI-assisted development and a track record of picking up new tools fast.

• Clear communication, strong ownership, and the drive to take work all the way to done.

• CS degree or equivalent practical experience.

Pulled from the full job description

• Parental leave
• 401(k)
• Health insurance
• 401(k) matching
• Vision insurance
• Health savings account
• Dental insurance, * 401(k)
• 401(k) matching
• Dental insurance
• Dependent health insurance coverage
• Disability insurance
• Flexible spending account
• Health insurance
• Health savings account
• Life insurance
• Paid holidays
• Parental leave
• Unlimited paid time off
• Vision insurance
• Work from home