Jiffy

Jiffy

Sr. Software Development Engineer

San Francisco, California, United States · Senior

No sponsorship$170k-$220kDetected 91 days ago
TypeScriptPythonJavaGoRubyReactTailwind CSSRailsCode ReviewSQLPostgreSQLMySQLKubernetesAPI DevelopmentGraphQLRESTAI OrchestrationPlaywrightLeadershipCommunicationMentoring

About the role

  • Jiffy.com is seeking a Software Development Engineer with deep hands-on experience orchestrating AI coding agents to ship production software at pace.
  • At Jiffy, engineers no longer write code by hand: every line that reaches production is produced, tested, reviewed, and deployed by coding agents (Claude Code, Codex, Cursor) under the direction of a human orchestrator.
  • You will thrive here if you are a systems thinker, a builder by nature, and someone who gets more done by managing five parallel agents well than by writing a single function perfectly.

Responsibilities

  • Design and architect scalable, reliable systems across our stack Rails 8 / Solidus e-commerce, GraphQL APIs, React 19 front end, Kubernetes infrastructure holding the architectural and judgment calls that agents cannot make.
  • Build and evolve Jiffy's internal AI tooling: author skills, rules, prompts, MCP integrations, and evaluation harnesses that make the whole engineering org faster.
  • Partner cross-functionally with Product, Design, Ops, and peer engineering teams to define and ship features; participate in architecture and code reviews; mentor engineers on AI-native workflows and orchestration patterns.
  • Experience driving agents to maintain and extend test suites with Playwright, Vitest, and RSpec.

Requirements

  • Bachelor's degree in Computer Science, Engineering, or a related field.
  • 5+ years of professional software engineering experience shipping production systems at scale.
  • Hands-on experience using AI coding agents (Claude Code, Codex, Cursor, or equivalent) as a primary development tool.
  • You must be able to walk through real features, refactors, or investigations delivered through agent orchestration - not occasional autocomplete usage.
  • Experience with relational databases (Postgres / MySQL), SQL, and building or consuming REST or GraphQL APIs.
  • Elite code-review skills: the ability to read, critique, and correct diffs at speed is the core competency of an AI-first engineer.
  • Applicants must be legally authorized to work in the United States without employer sponsorship, now or in the future.
  • 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 (React Query, XState, Jotai).
  • Final offers are tailored to each candidate and take into consideration their background and years of experience.

Nice to have

  • AI Tooling Builder: Experience authoring or extending AI developer tooling - custom skills, slash commands, MCP servers, sub-agents, evaluation harnesses, or prompt libraries used by a team.
  • Modern Front End: Experience with React 19, TypeScript, GraphQL (Apollo), Tailwind, and modern state management (React Query, XState, Jotai).
  • AI-Native Leadership: Track record of mentoring engineers on AI-native workflows, publishing internal patterns, or leading an organization through the shift away from manual coding.
  • Experience authoring or extending AI developer tooling - custom skills, slash commands, MCP servers, sub-agents, evaluation harnesses, or prompt libraries used by a team.

Skills

  • Strong written communication - clear intent, clear PR descriptions, clear prompts.
  • In an AI-first org, writing is the programming interface.
  • A high level of integrity, accountability, and ownership, with a commitment to excellence across every deliverable.
  • Desire to work in a fast-paced, ambiguous, high-autonomy environment.
  • E-commerce Depth: Experience with Ruby on Rails and Solidus / Spree, or other large-scale e-commerce platforms.
  • Measurable Throughput Gains: Documented improvements in features-per-week, cycle time, or review time directly attributable to AI adoption.
  • High-Growth Environment: Experience shipping in a fast-paced, agile environment at a high-growth startup or tech company.
  • Total compensation may include base salary, performance-based bonuses, equity, and benefits.
  • Comprehensive
  • author skills, rules, prompts, MCP integrations, and evaluation harnesses that make the whole engineering org faster.
  • Contribute to our shared.ai/ skills and rules library.
  • Experience operating services on Kubernetes (Istio,

Compensation

  • The base compensation for this role is expected to range from $170,000 - $220,000 per year.
  • What We Offer The base compensation for this role is expected to range from $170,000 - $220,000 per year.
  • Annual credit of $200 to use on our website plus more team merch drops than you will know what to do with!

Benefits

  • Full medical, dental, and vision coverage, with a portion of premiums paid by Jiffy.
  • Retirement Planning: 401(k) Wellness Support: Annual wellness benefits to help you stay healthy and balanced.
  • Tools for Success: Choice of MacBook or PC laptop, plus equipment for your home office setup.
  • Perks & Extras: Annual credit of $200 to use on our website plus more team merch drops than you will know what to do with!
  • Professional Development: Annual stipend to support your learning and career growth.
  • translate product intent into clear specifications, decompose work into agent-executable plans, drive agents through implementation, review every diff critically, run QA, land PRs, and verify production health.

Equal opportunity

  • EEO Jiffy is proud to be an
  • equal opportunity employer.

Visa & Work Authorization

  • At this time, Jiffy is not able to sponsor or take over sponsorship of an employment visa (e
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This listing is sourced directly from Jiffy's careers page and normalized into a canonical job model.