Senior Software Development Engineer

JiffyShirts.com

. Orchestrate Claude Code, Codex, Cursor, or equivalent AI coding agents across 3–6 concurrent work streams .

Posted 10/2/2026full-timeAustin • Texas • United StatesSenior💰 $195,000 - $265,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in orchestrating AI coding agents and building scalable systems, with a strong foundation in software design and development. Proficient in managing concurrent work streams and ensuring high-quality code through rigorous review and testing practices.

Highest-signal resume keywords

AI Coding Agents ExperienceRuby on Rails DevelopmentGraphQL API DesignConcurrent Work Stream ManagementCode Review Expertise

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

RubyPythonGoJavaReactTypeScriptPostgresMySQLREST APIsGraphQL

Soft Skills

Strong Written CommunicationHigh IntegrityAccountabilityOwnershipCommitment to Excellence

Tools & Technologies

KubernetesRSpecVitestPlaywrightSolidusTailwindReact QueryXStateJotaiMCP Integrations

Certifications & Qualifications

Bachelor's Degree in Computer ScienceEngineering

Industry Keywords

E-commerceAgile EnvironmentHigh-Growth StartupAI Developer ToolingDistributed Systems

Tech Stack

Tools & technologies

ApolloGraphQLJavaKubernetesMySQLPostgresPythonReactRSpecRubyRuby on RailsSQLTypeScriptGo

About the role

Key responsibilities & impact

Orchestrate Claude Code, Codex, Cursor, or equivalent AI coding agents across 3–6 concurrent work streams
Translate product intent into specifications and agent-executable plans
Drive agents through implementation, critically review every diff, run QA, land pull requests, and verify production health
Design and architect scalable, reliable systems across Rails 8/Solidus e-commerce, GraphQL APIs, React 19, and Kubernetes infrastructure
Catch hallucinated APIs and enforce secure, idiomatic coding patterns
Build and evolve internal AI tooling, including skills, rules, prompts, MCP integrations, and evaluation harnesses
Contribute to the shared .ai/ skills and rules library
Drive meaningful test coverage with RSpec, Vitest, and Playwright
Monitor deployments, respond to incidents, and own shipped services
Partner with Product, Design, Ops, and engineering teams to define and ship features
Participate in architecture and code reviews
Mentor engineers on AI-native workflows and orchestration patterns
Identify and automate remaining manual QA, operations runbooks, data investigations, and migrations

Requirements

What you’ll need

Bachelor's degree in Computer Science, Engineering, or a related field
5+ years of professional software engineering experience shipping production systems at scale
Mandatory hands-on experience using AI coding agents such as Claude Code, Codex, Cursor, or equivalent as a primary development tool
Ability to demonstrate features, refactors, or investigations delivered through agent orchestration
Ability to run multiple agents in parallel and manage concurrent work streams
Strong software design fundamentals, including OO design, API design, data modeling, distributed-system reliability, and performance
Proficiency in at least one server-side language such as Ruby, Python, Go, Java, or equivalent
Proficiency in one modern front-end stack such as React, TypeScript, or equivalent
Experience with relational databases such as Postgres or MySQL and SQL
Experience building or consuming REST or GraphQL APIs
Elite code-review skills
Strong written communication
High integrity, accountability, ownership, and commitment to excellence
Desire to work in a fast-paced, ambiguous, high-autonomy environment
Applicants must be legally authorized to work in the United States without employer sponsorship, now or in the future
Preferred: experience authoring or extending AI developer tooling, including custom skills, slash commands, MCP servers, sub-agents, evaluation harnesses, or prompt libraries
Preferred: Ruby on Rails and Solidus/Spree or other large-scale e-commerce platform experience
Preferred: React 19, TypeScript, GraphQL/Apollo, Tailwind, React Query, XState, or Jotai
Preferred: Kubernetes, Istio, KEDA, Flagger, and modern observability stacks
Preferred: Playwright, Vitest, and RSpec
Preferred: mentoring engineers on AI-native workflows
Preferred: documented improvements attributable to AI adoption
Preferred: fast-paced agile environment experience at a high-growth startup or technology company

Benefits

Comp & perks

Full medical, dental, and vision coverage, with a portion of premiums paid by Jiffy
401(k)
Annual wellness benefits
Choice of MacBook or PC laptop
Equipment for home office setup
Annual $200 credit to use on Jiffy's website
Team merchandise drops
Annual stipend for learning and career growth
Performance-based bonuses
Equity