Agentic-First Software Engineer (Miami)

Jiffy • Miami, FL

2h • $150,000 - $265,000

About The Position

Jiffy.com is hiring a senior, staff, or principal-level Agentic-First Software Engineer to deliver end-to-end features across its e-commerce platform, including the storefront, checkout, internal tools, and platform services. The role reports directly to an Engineering Manager and works closely with Product, general managers, and other cross-functional teams.

Jiffy’s engineering workflow uses AI coding agents, including Claude Code, Codex, and Cursor, to produce, test, review, and deploy production code under human direction. The engineer will orchestrate multiple concurrent agent work streams, make architectural and judgment calls, critically review agent-produced changes, and take ownership of features and services through production. The role also contributes to internal AI tooling and helps define AI-native engineering practices across the organization.

Applicants must be legally authorized to work in the United States without employer sponsorship, now or in the future. The expected base compensation range is $150,000–$265,000 per year. Total compensation may include performance-based bonuses, equity, and benefits.

Requirements

• Bachelor’s degree in Computer Science, Engineering, or a related field.
• At least 5 years of professional software engineering experience shipping production systems at scale.
• Hands-on experience using AI coding agents such as Claude Code, Codex, Cursor, or equivalent as a primary development tool; must be able to describe real work delivered through agent orchestration.
• Ability to run multiple agents in parallel and manage concurrent work streams while maintaining quality, context, and accountability.
• Strong software design fundamentals, including object-oriented design, API design, data modeling, distributed-system reliability, and performance.
• Proficiency in at least one server-side language (Ruby, Python, Go, Java, or equivalent) and one modern front-end stack (React/TypeScript or equivalent).
• Experience with relational databases such as Postgres or MySQL, SQL, and building or consuming REST or GraphQL APIs.
• Strong code-review skills, including the ability to read, critique, and correct diffs quickly.
• Strong written communication, including clear specifications, pull request descriptions, and prompts.
• High integrity, accountability, ownership, and commitment to quality.
• Desire to work in a fast-paced, ambiguous, high-autonomy environment.
• Legally authorized to work in the United States without employer sponsorship now or in the future.

Nice To Haves

• Experience authoring or extending AI developer tooling, such as custom skills, slash commands, MCP servers, sub-agents, evaluation harnesses, or team prompt libraries.
• Experience with Ruby on Rails and Solidus/Spree or other large-scale e-commerce platforms.
• Experience with React 19, TypeScript, GraphQL (Apollo), Tailwind, and modern state management such as React Query, XState, or Jotai.
• Experience operating services on Kubernetes, including Istio, KEDA, or Flagger, and modern observability stacks.
• Experience using agents to maintain and extend test suites with Playwright, Vitest, and RSpec.
• Experience mentoring engineers on AI-native workflows, publishing internal patterns, or leading an organization away from manual coding.
• Documented improvements in features per week, cycle time, or review time attributable to AI adoption.
• Experience shipping in a fast-paced, agile environment at a high-growth startup or technology company.

Responsibilities

• Orchestrate AI coding agents across 3–6 concurrent work streams involving features, refactors, bug fixes, and investigations, using worktrees, sub-agents, and background tasks.
• Own features end-to-end: translate product intent into specifications, break work into agent-executable plans, direct implementation, review diffs, run QA, land pull requests, and verify production health.
• Design and architect scalable, reliable systems across Rails 8/Solidus, GraphQL APIs, React 19, and Kubernetes infrastructure.
• Review AI-generated code for hallucinated APIs, security, idiomatic patterns, and structural quality.
• 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 using RSpec, Vitest, and Playwright; monitor deployments, respond to incidents, and own shipped services.
• Partner with Product, Design, Operations, 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 work, including QA, operations runbooks, data investigations, and migrations.

Benefits

• 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 and equipment for a home office setup.
• Annual $200 credit for use on Jiffy’s website and team merchandise.
• Annual professional development stipend.
• Total compensation may include performance-based bonuses and equity.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior