Software Engineer III

FanThreeSixty, LLC; Leawood (KS); On-site; USD 120,000 - 150,000; Full time

Job summary

FanThreeSixty, LLC is seeking a Software Engineer III to lead end-to-end delivery of a substantial product area. You will turn ambiguous problems into actionable plans, design and maintain code across the stack, and mentor junior engineers.

You’ll own features in production, participate in on-call rotations, and help shape architecture to improve velocity. The role emphasizes deep collaboration with product owners, robust testing, and strong DevOps practices, including CI/CD and observability.

Qualifications

• 5–8 years of software development/engineering experience.
• Bachelor’s degree or equivalent in CS/SE or related field.
• Strong system design, data structures, and modern development practices.
• Hands-on with Java, Python, React; familiar with Playwright, Vitest, JUnit, VSCode/IntelliJ.
• Experience building and consuming REST/SOAP APIs with caching and fault tolerance.

Responsibilities

• Own delivery for a significant slice of FanThreeSixty's product surface, including bugs, enhancements, and new features.
• Transform ambiguous problems into actionable plans and drive end-to-end execution.
• Design, build, and maintain code and data across the stack with cross-system awareness.
• Turn product requirements into technical specs with product owners on requirements and proofs of concept.
• Plan projects, set milestones, delegate work, and manage resources to hit deadlines.
• Write tests and documentation for changes and call out gaps in coverage.
• Review peers’ code and participate in architecture discussions with real influence.
• Diagnose complex bugs, fix root causes, and mentor less senior engineers.
• Own features in production, participate in on-call rotation, and handle incident response.
• Identify and address technical debt and architecture that limit velocity.

Skills

Software architecture

Java

Python

React

Playwright

Vitest

JUnit

VSCode

IntelliJ

Git

Jira

Datadog

CI/CD

Docker

Kubernetes

Education

Bachelor’s degree or equivalent in CS/SE

Tools

Playwright

Vitest

JUnit

VSCode

IntelliJ

Git

Jira

Datadog

CI/CD

Docker

Kubernetes

Job description

Software Engineer III is the technical backbone of a product area — the person who can take an ambiguous problem, from a bug fix to a multi-sprint feature, and own it end-to-end without needing to be told how to break it down.

Key Responsibilities

• Own delivery for a significant slice of F360's product surface: bugs, enhancements, and net-new features alike.
• Take on large, ambiguous problems and structure them into a plan others can execute against.
• Design, build, and maintain code and data across the F360 stack, with working knowledge of how products, workflows, and edge cases connect across systems.
• Turn product requirements into technical specs: partner with product owners on requirements, research, and proofs of concept.
• Plan and run projects — set milestones, delegate work, and manage the resources needed to hit them.
• Write tests and documentation for every change, and call out gaps in coverage before they become production issues.
• Review peers’ code and participate in architecture/design discussions with real influence over outcomes.
• Diagnose and resolve complex bugs, fixing the root cause rather than just the symptom.
• Mentor and unblock less senior engineers as part of daily work, not as a side project.
• Own features through production — participate in on-call rotation and take responsibility for incident response on services this role owns.
• Identify where technical debt or architecture choices are limiting team velocity, and make the case for addressing it — not just execute assigned work.

Outcomes / Success Metrics

• Code shipped under this role’s ownership meets F360’s quality bar (test coverage, review standards) without repeated rework.
• Complex, ambiguous work is delivered on the committed timeline, with risks and scope changes flagged early rather than at the deadline.
• Other engineers get unblocked faster because this person is available for review, pairing, and design input.
• Architecture and design decisions this person weighs in on hold up over time — they don’t get revisited for the same reasons within a year.
• Production incidents tied to this role’s code are rare, and when they happen, are diagnosed, resolved, and prevented from recurring.

Required Skills

• 5–8 years of software development/engineering experience.
• Bachelor’s degree or equivalent certification in Computer Science, Information Systems, or Software Engineering (or equivalent experience).
• Strong grasp of system design, data structures, and modern development practices.
• Hands-on with Java, Python, React, or similar; comfortable with Playwright, Vitest, JUnit, VSCode/IntelliJ.
• Experience building and consuming REST and SOAP APIs (sync and async), including caching and fault tolerance.
• Comfortable designing relational schemas and working with NoSQL data stores.
• Solid understanding of microservices architecture and inter-service communication patterns.
• Fluent in Git-based workflows and tools like Jira.
• Track record of independently scoping, estimating, and communicating project timelines.
• Experience mentoring or coaching other engineers.
• Familiarity with observability tooling — logging, metrics, tracing, and alerting (e.g., Datadog-class platforms) — as baseline competency, not just testing.
• Secure coding practices and data-privacy awareness (OWASP-level fluency), given F360 handles fan/customer data.
• Named fluency in CI/CD pipeline design and cloud-native practices (containers, infrastructure-as-code) — beyond just using a pipeline someone else built.
• Comfortable using AI-assisted development tools (e.g., Cursor, Claude, Gemini) as part of the daily workflow — not just aware they exist.