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20 jobs similar to Senior Software Engineer - Core Platform (Ruby/Rails)

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US 12w maternity 12w paternity

  • Own and drive projects end-to-end, from design and coding to testing and rollout.
  • Work across the full stack to deliver secure, scalable solutions on the Core Platform.
  • Mentor teammates and maintain high standards for code quality through reviews and pairing.

Huntress is a remote-first cybersecurity company founded in 2015 by former NSA cyber operators, making enterprise-grade security accessible to businesses of all sizes. The company secures over 5 million endpoints and 15 million identities worldwide, with a culture focused on impactful work and customer commitment.

UK EU 7w PTO

  • Build and maintain product features, taking ownership from initial discussion through to deployment.
  • Collaborate with Product and other stakeholders to define and refine the scope of new features.
  • Contribute to app maintenance, spending at least 20% of time on stability, performance, and developer experience.

Stora builds the operating platform for modern self-storage businesses, helping operators manage bookings, payments, customers, and day-to-day operations. With over 300 operators and rapid growth, we're a product-led team focused on innovation and improving self-storage.

US 12w maternity 12w paternity

  • Drive the technical vision and architectural evolution of the Core Platform, including foundational components like the notification system, onboarding, and APIs.
  • Design systems that empower all engineering teams to build faster and more securely, acting as a technical thought leader for scaling challenges.
  • Mentor engineers, partner with management, and eliminate cross-team dependencies to ensure smooth delivery of complex features.

Huntress is a cybersecurity company founded in 2015 by former NSA operators, providing enterprise-grade security to businesses of all sizes. They are a remote-first team of over 500 employees, securing more than 5 million endpoints and 11 million identities worldwide.

$150,000–$185,000/yr
US Unlimited PTO

  • Architect and scale responsive frontends using React and high-performance APIs using Ruby on Rails for mission-critical applications.
  • Own advanced PostgreSQL data modeling, schema migrations, query optimization, and indexing strategies at production scale.
  • Manage containerized services with Docker and Kubernetes, provision infrastructure with Terraform, and optimize CI/CD pipelines while collaborating across cross-functional teams.

Reveal Technology is a startup founded in 2019 that delivers software tools and intelligence for defense, security, and public safety missions in remote and extreme environments. The company is scaling its team and technology to meet the demands of modern warfare, fostering a culture of high craftsmanship and mission impact.

$120,000–$180,000/yr
US

  • Shape technical direction on the Essentials squad, contributing to architecture decisions and unblocking teammates while staying hands-on in Ruby on Rails, TypeScript, and React.
  • Lead by example in the codebase: write clean, maintainable code and elevate quality through code review and pairing.
  • Design and optimize back-end systems, APIs, and data flows with a strong focus on performance and reliability.

CentralReach is a leading provider of autism and IDD care software for Applied Behavior Analysis (ABA), multidisciplinary therapy, and special education. Trusted by more than 200,000 users, the company has been recognized as one of the best places to work over 10 times and fosters a culture centered around impact, inclusion, and flexibility.

$120,000–$140,000/yr
US

  • Build and maintain backend services and web applications using Ruby on Rails.
  • Develop customer-facing frontend experiences with modern JavaScript frameworks, ideally React.
  • Design, implement, and support integrations with internal platforms, external APIs, and data services.

FBS is a top three vendor of MLS software, driving success through its software products. The company is 100% employee-owned, offering a professional-yet-casual environment where employees earn stock and enjoy strong benefits.

$100,000–$150,000/yr
US Unlimited PTO

  • Build new systems and enhance existing systems for digital banking and lending products.
  • Collaborate with developers, QA, and Product Managers to design and implement features.
  • Contribute to the Engineering vision and roadmap with a focus on scalability and good design.

NinjaHoldings provides digital banking and lending products for consumers often overlooked, along with analytics services for other companies. They are a lean, growing company with a distributed global workforce.

$163,000–$185,000/yr
US

  • Own the technical roadmap for Platform Engineering, architecting scalable backend services and infrastructure.
  • Build and operate Kubernetes infrastructure, CI/CD pipelines, and developer tooling to boost engineering productivity.
  • Design and maintain enterprise integrations, billing platforms, and AI infrastructure including LLM orchestration and observability.

EasyLlama is an AI-powered Human Risk Management platform replacing outdated compliance training with bite-sized learning. Trusted by 6,000+ organizations, it's bootstrapped, profitable, and Inc. 5000-recognized with a fast-paced, ownership-driven culture.

US

  • Design and build scalable, performant, secure, and highly available systems in a continuous delivery environment.
  • Write clean, modular, and maintainable code with unit test coverage and advocate for best practices.
  • Collaborate with cross-functional teams and take ownership of delivering high-quality results.

Versant is a media and entertainment business that builds trusted brands shaping culture, informing audiences, and building lasting connections across four core markets. It is a publicly traded company with a collaborative, team-driven culture focused on continuous improvement and innovation.

US Unlimited PTO

  • Lead the technical vision and delivery of high-performance APIs and end-user experiences using Ruby on Rails and React.
  • Contribute to evolving software development and testing standards to elevate technical excellence across the team.
  • Collaborate with Product, Design, and Engineering teams to create high-impact features, balancing UX with clean code.

CirrusMD is redefining virtual care by delivering a Physician-first Care & Guidance solution that connects patients with licensed physicians via text or web within a minute. Serving 10 million users across all 50 states, the company offers a collaborative and diverse culture with unlimited PTO and remote-friendly growth opportunities.

Global 7w PTO

  • Build and ship Page Builder features that directly impact how customers design and publish their sites.
  • Work across the stack using React & TypeScript (frontend) and Ruby on Rails (backend).
  • Partner closely with product/design to translate specs into high-quality, user-friendly experiences.

Circle builds an AI-powered platform for creators and businesses to engage their audience with discussions, live streams, events, and payments. We are a fully remote company of 270 team members from 30+ countries, with a culture of async collaboration and bi-annual global offsites.

US Unlimited PTO

  • Design, build, and maintain core services and infrastructure that power large-scale logistics solutions.
  • Identify and address performance bottlenecks, ensuring reliability and scalability across the platform.
  • Collaborate closely with Product, Data Science, and other engineering teams to deliver impactful features.

Roadie is a logistics and delivery platform that helps businesses tackle delivery complexities with same-day and last-mile solutions. With over 310,000 independent drivers nationwide and a remote-first culture, Roadie values innovation, collaboration, and flexibility.

$100,000–$140,000/yr
US 4w PTO

  • Develop new features across the Ruby on Rails stack, collaborating with operations and sales.
  • Direct AI coding agents to frame problems, review code, and ensure high-quality output.
  • Improve system quality via TDD, refactoring, and writing precise design documentation.

Magellan AI provides visibility into the podcast advertising market with audio analysis and NLP, helping buyers optimize campaigns and sellers prove performance. It is an early-stage startup founded in 2016 with a team of seven engineers, offering a remote-first culture and competitive benefits.

Canada

  • Design and implement features end to end, primarily using Rails and React
  • Address performance and infrastructure challenges to scale while improving speed and reliability
  • Actively collaborate with CX and other team members to incorporate learnings and opportunities into the product experience

Junip operates a review platform for ecommerce merchants, helping shoppers make informed purchasing decisions. They are a small, profitable, and growing team serving over 10,000 merchants and millions of customers.

India

  • Design and evolve a sophisticated media intelligence platform using Ruby on Rails and VueJS.
  • Collaborate with product managers, stakeholders, and engineers to turn complex requirements into scalable solutions.
  • Lead technical initiatives from design through deployment, ensuring code quality and security.

The company builds a sophisticated media intelligence platform with global reach. It fosters a collaborative, inclusive, and globally distributed culture focused on innovation and professional growth.

UK

  • Design and build secure, performant external agent integrations across the GitLab monolith backend, owning complex features end-to-end.
  • Collaborate with Product Management, UX, frontend, backend, and AI specialists to refine requirements and deliver iterative improvements.
  • Design, implement, and review GraphQL and REST APIs, enhance automated testing, and participate in Tier 2 on-call rotations for production reliability.

GitLab is the intelligent orchestration platform for DevSecOps, enabling organizations to increase developer productivity, improve operational efficiency, reduce security and compliance risk, and accelerate digital transformation. With more than 50 million registered users and trust from over 50% of the Fortune 100, GitLab fosters a high-performance, remote-first culture driven by values, AI integration, and continuous knowledge exchange.

UK Unlimited PTO

  • Own and deliver quarterly goals for your team, leading engineers through ambiguity and ensuring support throughout delivery.
  • Collaborate with product management, design, and analytics to articulate technical constraints and partner on decisions with risk and trade-offs.
  • Foster a culture of quality by setting code review and design standards, and develop talent through feedback and guidance.

Affirm provides a clear, predictable way to pay over time, with no hidden fees or surprises. We are a remote-first company serving over 20 million people, with a culturally rooted Silicon Valley team spread across Europe.

India

  • Design, implement, test, and deliver backend features with minimal guidance using Ruby/Rails, Go, or other modern technologies.
  • Take ownership of features from requirement clarification to deployment and production follow-up.
  • Collaborate with product, frontend, infrastructure, and security teams to build secure, maintainable systems.

The company operates a large-scale technology platform used by millions of users. The team is remote and asynchronous, prioritizing collaboration and autonomy.

US Unlimited PTO

  • Build and maintain Ruby on Rails applications with PostgreSQL, including progressive web applications optimized for mobile, desktop, and offline use.
  • Design and implement RESTful APIs, database schemas, and data models for mission-critical defense and logistics systems.
  • Deploy and manage applications on Kubernetes using containerization, reproducible builds, and secure software supply-chain practices.

Reveal Technology is a dynamic startup revolutionizing field operations by delivering software tools and intelligence to operators in remote, disconnected, and extreme environments. Founded in 2019, the company is scaling its team and technology to meet the accelerating demands of modern warfare and national security.

$140,000–$157,500/yr
US Unlimited PTO

  • Collaborate with cross-functional teams to translate requirements into high-quality software, conduct code reviews, and ensure accessibility and compliance.
  • Build strong client relationships, communicate technical approaches, and align engineering strategies with client needs and priorities.
  • Contribute to engineering practices, mentor teammates, and support company growth initiatives and proposals.

MO is a mission-driven engineering and consulting firm that delivers technology solutions for clients, including federal government agencies. The company fosters a dynamic, high-trust culture with a diverse team and emphasizes collaboration, growth, and AI-enabled approaches.