Top Senior Ruby Jobs in Philadelphia, PA

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

Develop and maintain LabArchives electronic laboratory notebook, inventory, and scheduler products. Collaborate with product, operations, and support teams to design, build, test, release, and improve software features across front-end, back-end, and database layers. Create unit tests and expand automation frameworks, participate in code reviews, security audits, and accessibility evaluations, and contribute to continuous improvement in a remote environment.

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 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.

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.

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.

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.