Ruby Jobs

CompanyCam is hiring a senior backend engineer for its Rails and React codebase, working with engineers, designers, and PMs on everything from company-wide initiatives to small fixes, and helping shape the backend discipline of a growing team. They want T-shaped engineers: deep in one area, comfortable dropping into frontend, mobile, or discovery. Stack is Ruby on Rails with Sidekiq, PostgreSQL, GraphQL, and React. The engineering team is remote-first across every US time zone. CompanyCam makes the photo documentation app contractors use in the field.

Persona is hiring a senior engineer for Online Data Stores, the infrastructure team that builds and evolves the data storage behind the whole application stack, owning scalability, reliability, and performance of those core systems and setting storage best practices for other engineering teams. Rails alongside Go and Python. Persona builds the identity layer for the internet and sponsors the Ruby Passport Booth at SF Ruby 2026.

Koah Labs is hiring at the ground floor for an early-career engineer, one of the few genuinely junior Rails roles in the Bay Area right now. You help shape core systems in the ad network powering AI-native products, on a small team out of San Francisco with backgrounds at X, Apple, and Meta. Core application is Ruby on Rails, React, and TypeScript; data is PostgreSQL, ClickHouse, Redis, and Kafka; infra is Terraform and AWS.

Chime is hiring a full-stack Growth Engineer to build product experiences that move business metrics: React and TypeScript on the front end, Rails and Go services behind it. You work closely with product, design, and data science on features that drive member growth. Chime is a Pickaxe sponsor of the SF Ruby Conference.

Chime is hiring a full-stack engineer for its Membership team, building and evolving the features that deepen member engagement and retention across Chime's membership products. The posting asks for proven experience with Ruby on Rails or a comparable framework, alongside TypeScript and React.

Chime's Support Foundations team builds the infrastructure behind every support interaction a member has: the automated phone system, the in-app chatbot, live chat with human agents, and the data and routing systems underneath. The posting asks for experience with Ruby on Rails or comparable frameworks and with transactional databases and caching.

Gusto is hiring a Senior Staff Engineer on Tax Platform Engineering to build the core platform behind tax compliance for millions of people, guiding projects end to end from feature spec to rollout. The posting describes the work as helping scale one of the largest Ruby/Rails and TypeScript/React applications in the world. Gusto powers payroll, benefits, and HR for more than 500,000 small businesses.

Gusto is hiring a Staff Software Engineer on AI Voice and Content, working in a collaborative, test-driven environment where experience with Ruby on Rails is listed among the things they look for. Gusto runs one of the largest Ruby on Rails and TypeScript/React applications in the world, powering payroll, benefits, and HR for more than 500,000 small businesses.

Duler builds a workforce-management platform for hospitality, giving hotel teams intelligent scheduling and staffing software. Founded by the founder of Lodgistics (acquired 2024), currently in pilot with 14 hotel clients. This is the founding senior engineering hire: own the technical stack end to end, ship features with design partners, stabilize the platform, set engineering standards, and hire and mentor the early team. Backend is Ruby 3 and Rails 8 (PostgreSQL, Redis, Solid Queue, Devise, Action Policy, RSpec, Kamal, Docker). Frontend is React 19 with strict TypeScript, Vite, Tailwind, shadcn/Radix, Zod, and Nanostores, using OpenAPI-first client generation. Eastern timezone: onsite in Raleigh NC, hybrid, or remote across the US, Canada, and the Americas.

Chime is hiring a Software Engineer in the Lending org, building the backend platforms behind its credit and liquidity products (MyPay earned-wage access, SpotMe overdraft, and Instant Loans). You'll design real-time money movement, underwriting, ledgering, and repayment systems where correctness, reliability, and auditability matter, working in Ruby on Rails alongside Product, Risk, and Finance. Chime is the largest US consumer fintech, helping everyday Americans build credit and get ahead.

Omada Health is hiring a Senior Software Engineer on Core Systems & Integrations to build and scale the platform capabilities that integrate and validate critical health data, delivering real-time, clinically meaningful insights for care teams and members. Own projects end-to-end from technical design through deployment, working at the intersection of data integrations, backend systems, and healthcare workflows. 7+ years with a strong backend focus (Ruby on Rails or Python), a relational database (PostgreSQL/MySQL), and experience operating distributed, event-driven systems with high reliability. Stack: AWS, Ruby, Rails, Postgres, GraphQL, Docker, Kubernetes. $179-224K base in CA/NY/WA + bonus + equity. US-based.

Gusto is hiring a Senior Staff Engineer to serve as a Technical Lead across the Money Group — its fastest-growing org and the cornerstone of Gusto's shift into a Small Business Finance Platform. Shape the technical vision for the systems powering financial accounts, money movement, lending, and expense controls, guiding architectural direction across 15-20 engineers while still prototyping and shipping. Help scale one of the largest Ruby/Rails and JavaScript/React applications in the world. $189k-$236k base in Denver and most remote locations, $223k+ in SF/NY + bonus + equity.

Ubicloud is building an open-source alternative to the big clouds — elastic compute, block storage, managed PostgreSQL, GitHub Actions runners, Kubernetes, and AI inference — serving 500+ customers. The control plane is written in Ruby on the Roda framework with Sequel and PostgreSQL (not Rails), and that codebase is fully open source. You'll work across the Postgres, GitHub Actions, and AI inference products, building real systems software in Ruby. Mid-stage role (2-8 years). $95K-$250K base + 0.15%-0.50% equity.

AngelList is hiring a back-end-focused Senior Software Engineer on its Accounting team to build the accounting infrastructure behind its fund-management platform — scalable systems that model financial workflows, read and write to the general ledger, and produce audit-ready outputs with rigorous data integrity. Stack is Ruby on Rails (or a similar MVC framework), React, TypeScript, Postgres, and MySQL. 5+ years of experience, back-end weighted, with room to venture into the React/TypeScript frontend. Hybrid, two days per week in SF or NYC.

AngelList is hiring a full-stack Senior Software Engineer to build the financial infrastructure powering private markets. The two primary languages at AngelList are Ruby and TypeScript, and this is a generalist role (or a back-end specialist comfortable across the stack) with 4+ years building large-scale web applications. A single application is considered for all open team-specific roles. Hybrid, two days per week in SF or NYC.

Thatch is hiring an Infrastructure Engineer to ensure reliability, security, and performance across its HIPAA-compliant environment, building infrastructure-as-code and improving CI/CD. Stack is Ruby on Rails, PostgreSQL, and Terraform. Thatch is building the modern ICHRA health-benefits platform that lets employers give employees money to buy their own health coverage.

Superconductor is building a platform where AI agents find work autonomously across customer emails, bug reports, session replays, Slack threads, and X posts, then ship code while you sleep. The Principal Web Developer is the architect, reviewer, and quality guardian for the fleet: defining patterns, evolving the Rails application architecture, writing agent instructions and coding standards, and being the last line of defense before code reaches production. A realistic goal from the team: ship more quality code in your first month than you did in all of 2025. Team of 7, $7M raised, founders previously co-founded Gradescope and were AI PhDs at UC Berkeley. Hybrid in the East Bay (3 days in a BART-accessible office, 2 from home). 10+ years of Rails experience required, ideally 15+. Bonus points for active Rails community involvement (conferences, gems, open source) and experience with React, Tailwind, Stimulus, Turbo, Hotwire, and AI coding tools like Claude Code, Cursor, or Copilot.

Gusto is hiring a Staff Software Engineer to join the Core AI Platforms team — engineering the core business engine that 5+ product teams depend on. Help scale one of the largest Ruby/Rails + JavaScript/React applications in the world. Build reliable backend services, set the engineering standard for those around you, and partner with Product Engineering, Product Management, Data, and Design to translate customer pain points into solutions. AI is a fundamental part of how work gets done at Gusto. Hybrid in SF / Denver / NYC. $163k-$204k base depending on location + bonus + equity.

Finta is hiring a Founding Engineer to collaborate directly with the CEO and designer on complete product features end-to-end, from backend to frontend. Work with Ruby on Rails, Hotwire, Stimulus, Tailwind, and Redis to build banking and accounting integrations with rigorous data-quality and reliability standards. Finta automates bookkeeping, files taxes, and gives companies real-time financial metrics. 6+ years of Rails experience required. Regular use of AI coding tools (Cursor, Claude Code) expected. $150-$250k base + 5% equity.

Thatch is hiring a Full Stack Software Engineer to own product areas spanning frontend and backend systems for its health benefits platform. Build across React, TailwindCSS, and Ruby on Rails to ship features that directly impact employer benefits management, employee onboarding, and payment systems. Strong product judgment, systems thinking, and a track record of shipping production applications required. $161k-$230k.

Gusto is hiring a Principal Software Engineer on Pay Group Engineering to function as a Technical Lead across multiple teams, helping keep engineers unblocked and shipping high-quality work. Design, build, and test the foundation that supports compliant payroll for millions of people. Help scale one of the largest Ruby/Rails and TypeScript/React applications in the world. Mentor fellow engineers and drive holistic, scalable solutions. 15+ years of experience, expertise in resilient backend system design. $215k-$295k depending on location.

Persona is hiring a Senior Product Security Engineer embedded in a generalist security team. Drive the full vulnerability lifecycle, design autonomous systems and AI tooling that scale security across every team and product, partner with product engineers to shape how new features get built securely, and run the bug bounty program. 6+ years of software engineering experience, 3+ years in product security. $200K-$280K + equity.

Checkr is hiring a senior full-stack engineer on its Trust team, the group that keeps the background-check platform honest at scale. The posting asks for advanced knowledge of Ruby (Rails) and JavaScript (React), 5+ years of full-stack experience, and comfort using AI tools day to day. Checkr has hosted the SF Ruby meetup.

Edfinity is hiring a senior full-stack engineer across assessment authoring, LLM-powered features, performance work, and technical debt. Stack is Ruby on Rails with MongoDB, Elasticsearch, ClickHouse, Redis and Sidekiq, plus React. Bootstrapped and NSF-supported, a small remote team of senior engineers building courseware and assessment technology for higher-ed STEM. US work authorization required; they do not sponsor visas.

Pair Team is hiring a senior platform engineer for its infrastructure pod: deep AWS and Terraform expertise, while being comfortable working in the company's Ruby on Rails codebase. Pair Team is a public benefit corporation and AI-enabled medical group connecting Medicaid and Medicare patients to care alongside housing, food, and transportation support.

Decile Group runs VC Lab, the leading venture-capital accelerator, and the Decile Hub fund-operations platform. This role is for an experienced Ruby on Rails developer with an emphasis on front-end work, owning projects end-to-end and building directly with the people who use the tools (the interview includes a Rails coding challenge). Must work within a few time zones of Pacific. Palo Alto HQ, remote.

Fathom is the AI meeting assistant that captures, summarizes, and organizes calls so teams stay present without losing context — a fast-growing, YC-born consumer AI product. This backend role builds the core platform on Ruby on Rails and Sidekiq alongside Go services, running on GKE with MySQL, Redis, and Kafka. Remote (US). $180K-$240K plus equity.

WindBorne flies the world's largest smart weather-balloon constellation and builds WeatherMesh, the AI forecast model that has beaten DeepMind's GraphCast. The Gov Platforms team builds government-compliant versions of WindBorne's core platforms (FedRAMP, ITAR, NIST 800-53), adapting the data pipelines, APIs, and analysis tools for federal customers. Full-stack across Ruby on Rails (frontend), Python and Rust (backend), and Postgres; 5+ years. Khosla-backed (~$25M raised, Series A). Redwood City or remote (US).

SerpApi is a profitable, bootstrapped API for real-time search-engine results (Google and dozens more), trusted by developers at scale and a Rails Foundation member. This junior full-stack role builds and maintains the product across Ruby, Rails, MongoDB, and JavaScript, deployed on AWS. Remote-first, US-eligible; the team is based in Austin, TX. $80K-$100K base plus profit share.

Salma Health is a brain-health company delivering interventional psychiatry (TMS plus care coordination), out of stealth in March 2026 with an $80M Series A led by Mubadala Capital and ARCH Venture Partners; clinics across California. This mid-level role (3-5 years) builds EHR, CRM, and billing integrations across Node.js, Python, and Ruby. San Mateo HQ.

Arkestro is building a predictive procurement platform that combines AI and behavioral science to help enterprises source and negotiate. This role builds and scales the product on a Ruby on Rails backend with a React/TypeScript frontend; 6+ years of Rails/Ruby. Stack: Rails, React/TypeScript, PostgreSQL, Redis, AWS, Kubernetes. San Francisco company, remote-US. (Series B.)

EDO is a TV measurement and advertising-analytics platform. This role builds data-visualization and reporting features on a Ruby on Rails backend with a React/TypeScript frontend. Stack: Rails, React/TypeScript, MySQL, Snowflake, AWS. Los Angeles, CA company, remote-US. (Series B.)

Better Stack is building an AI-native incident-response and observability platform. This full-stack role works on a Ruby on Rails backend with a Vue.js frontend, on PostgreSQL, Redis, ClickHouse, and Redpanda. Remote across North America (US-eligible). (Series A.)

Relevant Healthcare is a bootstrapped, profitable ~24-person team building a healthcare-analytics platform for safety-net providers (community health centers). This senior/lead role (5+ years) works across a Ruby on Rails backend with a TypeScript/React frontend, Go, and GraphQL. Fully remote, US/Canada.

Stepful (YC-backed) is building the platform that trains and places healthcare workers. This staff-level product engineering role builds user-facing features across the platform. The posting states: 'Familiarity with any of the following languages for the backend: Python, Node.js, Ruby on Rails.'

Stepful (YC-backed) is building the platform that trains and places healthcare workers. This senior product engineering role ships student- and instructor-facing features across the Rails backend and a React/TypeScript frontend. The posting lists Ruby on Rails among the accepted backend languages alongside Python and Node.js.

Simple AI (YC S24, $14M raised) builds voice AI agents that handle enterprise phone operations — support, order intake, lead qualification — for customers like DoorDash and xAI. This is a founding full-stack role; the core work is LLM/voice AI systems, with Ruby on Rails listed among the 'nice to have' stack experience alongside Python, TypeScript, React, PostgreSQL, and AWS. 4+ years of experience.

Mudflap (Palo Alto) is a profitable fintech building fuel-payment products for the $800B trucking industry, helping truckers save on fuel and connecting fuel stops with new customers. You'll build and scale the Ruby on Rails payments and transactions platform end-to-end; the posting spans levels from 1+ to 8+ years. Stack: Ruby on Rails, PostgreSQL/AWS Aurora, Vue.js, REST APIs, AWS ECS, CircleCI.

Authorium (formerly City Innovate) is a GovTech SaaS unifying procurement, grants, and budgeting workflows for state and local governments; clients include California's CDSS, CalPERS, and EDD. This senior role owns core architecture — versioning, approval workflows, and permission models — on a Ruby on Rails modular monolith built with Packwerk. Stack: Rails (Packwerk), Hotwire, PostgreSQL, React/Next.js, AWS. Hybrid in SF, Mon-Thu in office.

Authorium is a SF GovTech startup automating procurement, grants, and budgeting for state and local governments. This mid-level full-stack role builds features across a Ruby on Rails modular monolith that manages billions in public funds. Stack: Rails, Hotwire, PostgreSQL, Next.js. Hybrid in SF, Mon-Thu in office.

Luthor (YC F24) is an AI-powered marketing-compliance platform for regulated industries — fintechs, banks, and investment advisors — reviewing and enforcing policy on marketing content as it's created. As one of the first full-time engineering hires, you'll work directly with the founding team on the core Ruby on Rails platform; 3+ years of experience. Stack: Ruby on Rails, React, PostgreSQL, JavaScript.

Prevail Legal is an SF legal-tech startup building the legal industry's Testimony Intelligence Platform — remote court reporting, AI-assisted transcription, and testimony management (SOC 2 Type 2, ISO 27001). This senior full-stack role builds end-to-end on a Ruby on Rails monolith with the Hotwire stack, reporting to the CTO; 3-5+ years of Rails. Stack: Ruby on Rails, Stimulus/Hotwire/Importmaps, PostgreSQL, AWS, Docker, WebRTC.

Prevail Legal is an SF legal-tech startup building a Testimony Intelligence Platform for the legal industry. This mid-level full-stack role builds web applications and new features on a Ruby on Rails monolith (Hotwire stack) in a fully remote setting; 4+ years of Rails.

Instrumentl is a profitable, YC-backed SaaS automating grant discovery and management for 1,500+ nonprofits. This full-stack generalist role builds and scales the product end-to-end on a Ruby on Rails stack; 7+ years of experience. Stack: Ruby on Rails, Python, JavaScript, PostgreSQL, Redis. Distributed team with an Oakland office.

GitHub.com runs on a Ruby on Rails monolith. The Client Apps Platform team connects the gh CLI, Desktop, and Mobile apps to backend teams; you'll maintain and operate production Ruby and Go services and integrate with GitHub's Ruby on Rails monolith. SF-headquartered, remote across the US.

General Medicine is a consumer healthcare marketplace from the founders of PillPack / Amazon Pharmacy, showing upfront cash and insurance prices for virtual and in-person visits, prescriptions, labs, and imaging. This full-stack role builds the core product; the team states 'We currently use AWS, Ruby on Rails, and Next.js,' on PostgreSQL. SF HQ with a Boston office. (Seed, $32M, Matrix Partners-led.)

Ascend is an all-in-one payments and financial-automation platform for the insurance industry: online customer payments, premium financing, and commission/carrier-payable distribution. The backend is a Ruby on Rails API on Heroku, with a Next.js + TypeScript frontend on Vercel, Tailwind, PostgreSQL, and Redis. ~50+ people across SF and Columbus. (Series B.)

Pie Systems (PieVAT) is a fintech digitizing VAT and tax-free-shopping refunds for travelers and merchants. You'll contribute to the Ruby on Rails application and support deployments and releases, alongside a modern JavaScript frontend. US HQ in San Francisco (also Copenhagen and Tokyo). (Series A, $15.5M, Nov 2025.)

Middesk is a business-identity-verification fintech (YC, Sequoia, Accel) that helps companies onboard and underwrite other businesses. This full-stack product role builds on a Ruby on Rails + PostgreSQL backend with a React/Redux frontend; all levels welcome. Hybrid in SF, two days per week. (Series B.)

Found is business banking for the self-employed (founded by ex-Square execs), with banking, tax automation, and expense tracking built on Ruby on Rails. This full-stack role requires production experience with Ruby on Rails or a comparable framework; the posting asks for 12+ years despite the 'Senior' title. Stack: Rails, React, Redux, TypeScript, MySQL, Spanner.

Koah Labs is hiring a Backend Software Engineer to design data models, abstractions, and high-performance systems for the ad infrastructure powering AI-native products. Example projects: build scalable data models that align publisher and advertiser interests across multiple impressions per ad request, design abstractions for new ad formats and engagement tracking, build a low-latency frequency-capping system to prevent ad fatigue, and create schemas for high-volume ad bidding with exchanges. Stack: Ruby on Rails, React, TypeScript, PostgreSQL, ClickHouse, Redis, Kafka, AWS. Active users of palkan's layered design for Rails, Lefthook, Yabeda, and test-prof. Backed by Theory Ventures, Forerunner Ventures, and South Park Commons.

Koah Labs is hiring a Product Software Engineer to ship across the stack and shape product direction for an ad network powering AI-native products. Lead initiatives end-to-end with high agency in product and technical design — optimize matching algorithms, build experiences reaching millions of users, partner with data and GTM teams, and run experiments to learn how users interact with AI-native products. Strong fit for former founders or early-stage engineers comfortable with ambiguity and fast feedback loops. Stack: Ruby on Rails, React, TypeScript, PostgreSQL, ClickHouse. Active users of palkan's layered design for Rails, Lefthook, Yabeda, and test-prof. Backed by Theory Ventures, Forerunner Ventures, and South Park Commons.

Koah Labs is hiring a Platform Software Engineer to design, build, and maintain the infrastructure powering an ad network for AI-native products. Operate serious systems at scale, own the platform layer beneath the product, and build reliable systems with rigor on performance and observability. Infra stack: Terraform, AWS, LGTM (Loki, Grafana, Tempo, Mimir), Tailscale, Cloudflare. Data: PostgreSQL, ClickHouse, Redis, Kafka, Python. Core app: Ruby on Rails, React, TypeScript. Active users of palkan's layered design for Rails, Lefthook, Yabeda, and test-prof. Backed by Theory Ventures, Forerunner Ventures, and South Park Commons.

Mon Ami is a San Francisco company building software for the aging and disability services sector — the platform that Area Agencies on Aging and public agencies rely on to manage caregivers and deliver senior services. As a Senior Rails Engineer you'll design, build, test, and maintain core product software, lead a defined area of the codebase, and mentor 1-3 junior engineers alongside product managers. The stack is Ruby on Rails, PostgreSQL, Hotwire/Turbo, Stimulus, ViewComponent, Bootstrap, and RSpec, with a heavy emphasis on disciplined testing and code quality. Apply via jobs@monami.io.

Patch is the platform powering corporate climate action — a marketplace + API for buying verified carbon-removal credits, routing hundreds of millions of dollars to projects that permanently pull CO₂ out of the atmosphere. Originally pitched as 'Stripe for climate,' now a full market infrastructure layer for environmental commodities. Backed by a16z, Coatue, and Energize Ventures; $80M raised through Series B; HQ San Francisco. They're hiring Product Engineers to own outcomes end-to-end — defining problems, pressure-testing solutions, and shipping reliable software in a high-trust EPD environment. Core stack is Ruby on Rails + Stimulus; prior Rails experience helpful but not required. AI-native workflow expected. In-person SF; senior or staff+ scope.