Senior/Staff Design Engineer

About Fine Tune Fine Tune helps large enterprises bring complex indirect services under control, specializing in facilities management, uniform rental, waste and recycling, security and guard services, pest control, and energy and utilities. We combine experienced operators with our auditing platform, eMOAT℠ to monitor invoices and enforce agreements month after month, providing spend confidence to our clients in procurement and finance. The world’s most recognizable brands choose Fine Tune, including Cargill, Caterpillar, Valvoline, Pfizer, Tyson Foods, and American Cancer Society. For more information, visit www.FineTuneUS.com. The Opportunity We're looking for a Senior/Staff Design Engineer to design and build the front end of our products. You'll work in our codebase every day, in Rails views with Hotwire, Stimulus, and Tailwind, taking work from first sketch to production and owning the code you ship. What's designed is what ships, because you built it. This is a senior individual-contributor role. Beyond your own features, you'll own our design system in code, set the patterns other engineers build on, review front-end work, and set design direction for our products alongside product. Our users are the auditors and operators on our internal team who serve procurement and finance teams at major global companies, and the software they rely on lives for a long time. Depth in our domain is part of the job here. The best design decisions come from understanding how their work actually gets done. At Fine Tune, our core values of honesty, dedication, and vigilance foster an environment of trust, open communication, and inclusivity where everyone can do their best work. If you care about your craft, want to keep getting better, and thrive in a team that's building something meaningful — let's talk. Our interview process includes a hands-on technical pairing session, where we'll work in code together and talk through product decisions as we go. This is a full-time, salaried, remote position. Candidates must reside in the United States and be legally authorized to work in the United States without employer sponsorship. What You'll Do Design & Build Design and build features end to end in Rails with Hotwire, Stimulus, Tailwind, and DaisyUI, from first sketch to productionOwn your code through release, including tests, accessibility, performance, and the bugs that come backBuild and maintain the design system as code: tokens, theming, reusable components, and the guidance engineers follow without a designer in the roomPrototype in code when it answers the question faster than a mockupReach for JavaScript only where it earns its keepBuild interfaces that hold up at real data volume: large tables, dense forms, long-running jobsEstablish patterns for AI-powered features, such as confidence, human review, and correction Raise the Bar Review front-end pull requests for correctness, accessibility, and fit, and explain precisely what's wrong when it isRaise engineers' design judgment through pairing, review, and exampleLead design critique, audit products for accessibility and usability debt, and prioritize the fixesLead tool evaluation and adoption for how the team designs and builds Set Direction & Shape the Work Own the design direction and interaction patterns for our productsResolve the tension between purpose-built workflows and general-purpose surfaces across productsLead discovery alongside product management, and frame ambiguous problems as answerable questionsShape new work before it's committed to, naming design risks and what's explicitly out of scopeWeigh approaches against the time available, and know when to cut scope and when to escalateUse research and prototypes to de-risk new work, and know when there's enough evidence to move onCoach business stakeholders to build and vet their own prototypes, including with AI-assisted tools Collaborate & Influence Partner with product and leadership to align design direction with product and business goalsTranslate design tradeoffs into terms non-designers can act onImprove design workflows and handoff across concurrent product teamsInfluence priorities and the roadmap with credible, trusted design judgment grounded in evidence What We're Looking For 5+ years designing and building product software, with substantial time shipping production front-end codeStrong HTML, CSS, and JavaScript; comfortable debugging in the browser and reading unfamiliar codeComfortable in a server-rendered web app: writing view code, and working with controllers and models enough to wire up a feature (Ruby is a plus)Day-to-day fluency with Git, pull requests, code review, and writing tests for your UIA portfolio that shows both design and code: shipped work, repos, or a walkthrough of something you builtExperience building or owning a design system in codeA track record of setting design direction for complex, data-dense B2B or operational softwareExperience leading discovery and research alongside product managementDeep working knowledge of accessibility standards (WCAG) and how to design and build to themProficient with Figma, and fluent prototyping in code and with AI-assisted tools Domain Deep understanding of the business your product serves, or a clear track record of building that understanding quicklyAble to bring domain reasoning into design direction, not just requirements conversations Professional Skills Exceptional communicator — you present complex information clearly and facilitate alignment across groupsA force multiplier — you drive cross-team collaboration and build strong relationships organization-wideHandles the most complex problems and establishes problem-solving approaches others adoptTakes ownership well beyond your immediate role and drives initiatives to completionLeads across teams without authority and influences significant product decisionsModels the professionalism, judgment, and accountability you want to see in the team Nice To Have Prior production work in Rails with Hotwire and StimulusTailwind CSS and DaisyUIExperience working in fixed-time, variable-scope product cyclesDesigning AI-powered features, such as review and correction of machine-extracted dataData visualization for operational dashboardsExperience as the first or only designer on a product teamExposure to enterprise software, procurement, or finance operations domains Why Join Build What You Design: Design and ship the product yourself, and set the direction and system the team builds on — high-leverage IC work without being pushed into management Growth Path: We invest in your development with clear career progression, regular feedback cycles, and a rubric-based framework so you always know where you stand and where you're headedLearning Culture: Book clubs, mentoring programs, and a team that values continuous improvement — we believe in "Learn One, Do One, Teach One"Collaborative Team: Work with a tight-knit engineering team that values quality, open communication, and professional growth in an inclusive environmentMeaningful Impact: Your work directly helps remove the tedious, complex work that bogs down procurement and finance teams at major global companiesHealthy Balance: Remote flexibility with respect for work-life balance — we believe sustainable work leads to better outcomes The Pay Range For This Role Is 130,000 - 200,000 USD per year(Remote (United States))