Top Ruby Jobs in Philadelphia, PA

Leads technical direction and develops fullstack purchase experiences using Ruby on Rails and Vue.js. Designs resilient transactional flows, integrates billing and CRM systems, improves reliability and rollout safety, mentors engineers, reviews code, reduces technical debt, and participates in incident response. Partners with Product, Design, Billing, and Support to improve GitLab’s purchase, subscription, discount, and upgrade workflows.

Lead design and delivery of backend-focused full-stack features for the Business Platform. Build APIs, data models, and reliable parsers, ensure secure resilient systems, mentor engineers, drive estimates and quality, collaborate with Growth on data-driven features, and integrate AI tooling into development workflows.

As a Senior Software Engineer, you will design and maintain systems, mentor team members, and improve both code quality and team practices.

Design and implement backend and real-time features in the GitLab monolith for portfolio planning at scale. Optimize PostgreSQL performance, evolve APIs (GraphQL/REST), build capacity planning and work-item hierarchies, create proofs of concept, maintain automated tests, support safe rollouts with feature flags and observability, mentor contributors, and participate in on-call and production troubleshooting.

Lead technical vision and implement high-impact Ruby on Rails solutions for an internal demo platform. Improve reliability, observability, instrumentation, and integrations; partner with Product, Sales, and cross-functional teams; mentor engineers and drive architecture, testing, and engineering best practices.

Lead hands-on full-stack development for Ruby on Rails, TypeScript, and React applications. Shape technical direction, design reliable APIs and data flows, optimize relational database performance, and deliver responsive front-end experiences. Lead projects end to end, mentor engineers, review and refactor code, collaborate cross-functionally, and explore AI-assisted engineering and LLM automation while protecting sensitive healthcare data.

Build and maintain full-stack Ruby on Rails and React applications for defense and logistics operations. Responsibilities include designing APIs and data models, developing multi-source ingestion pipelines, creating data visualizations, deploying services on Kubernetes, implementing observability and security, optimizing disconnected-environment performance, and collaborating with product and design teams. The role also involves architecture discussions, technical documentation, testing, code reviews, and integration with secure DoD systems.

The Full-Stack Engineer will develop and modernize a monolith application, manage infrastructure, and enhance the front-end experience using Ruby on Rails and React.

The Automation Engineer will collaborate closely with teams, monitor test iterations, and ensure effective defect resolution throughout the software development lifecycle.

Designs, researches, and implements complex cross-system software; translates customer requirements into solutions; develops and optimizes data models and storage; mentors junior engineers; performs code reviews, TDD, and complex bug fixes; operates in Agile/Waterfall environments and promotes development best practices.

Design, develop, and maintain complex cross-system software; translate user requirements into solutions; implement best practices and development processes; resolve complex technical issues; mentor and train junior engineers; design complex data models and complete difficult bug fixes; participate in specifications, code reviews, and collaborate across teams in various development environments.

Build and own platform APIs and internal tooling for real-time EHR sync and FHIR ingestion. Maintain ingestion pipelines, reliability, normalization, framework upgrades, CI, and observability. Diagnose production issues, ship durable fixes, and take end-to-end ownership of production systems and on-call responsibilities.

Build and own the platform API and internal tooling for real-time EHR sync, FHIR ingestion, and vocabulary normalization. Implement and maintain ingestion pipelines, ensure sync reliability, perform framework upgrades and developer tooling, diagnose production issues, and maintain observability and correctness. Ship production features and own on-call responsibilities for platform subsystems.

The Ruby Engineer will focus on web scraping and browser automation, fix code issues promptly, support customers, and enhance search engine integrations.

Looking for a senior Ruby on Rails engineer to own complex projects and improve the product's technical direction, requiring extensive experience and a high standard of coding.

The Senior Full Stack Developer will build end-to-end solutions, collaborate in a remote environment, and write technical documentation. The role requires expertise in Ruby on Rails and various programming paradigms.

As a Mid-Level Full Stack Developer, the role involves building and maintaining web applications, implementing new features, and optimizing performance using Ruby on Rails in a remote setting.

Design, build, and maintain Ruby on Rails APIs and React frontends; architect and optimize PostgreSQL schemas and queries; manage Docker/Kubernetes services and Terraform IaC; implement PKI/mTLS and secure authentication; solve offline data serialization/synchronization; own CI/CD pipelines and support mission-critical field deployments.

Seeking a Ruby on Rails Engineer to design and implement features, enhance backend applications, and support operations in a collaborative team environment.

Mudflap seeks software engineers to build and scale their payments platform using Ruby on Rails, collaborating cross-functionally and owning features end-to-end.