Senior Software Engineer - Fullstack (Ruby on Rails)

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Software Engineer – Fullstack (Ruby on Rails) based in the United States.

Join a mission-driven digital services team building secure, modern applications that improve how government agencies serve the public. As a Senior Software Engineer, you will contribute across the full software development lifecycle, combining strong Ruby on Rails expertise with React-based front-end development. You will work in small, cross-functional teams to transform complex business needs into accessible, reliable, and scalable digital solutions. Your work will support meaningful public-sector missions, including public health, financial regulation, immigration services, and identity and access management. Collaborating closely with product managers, designers, researchers, and fellow engineers, you will help deliver high-quality applications using modern cloud infrastructure and continuous delivery practices. This opportunity offers technical ownership, a calm and collaborative working environment, and the chance to make a tangible difference through technology.

Accountabilities:
As a Senior Software Engineer, you will design, build, test, and maintain full-stack applications while ensuring technical quality, security, and accessibility. Your responsibilities will include:

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Translate business objectives and user needs into effective technical solutions using Ruby on Rails and modern web technologies.

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Design, develop, and maintain responsive, accessible, user-facing features using React and other front-end technologies.

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Build and integrate RESTful APIs that support front-end functionality and reliable application performance.

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Contribute throughout the product lifecycle, including backlog refinement, development, testing, documentation, deployment, and delivery.

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Develop secure, scalable, and maintainable cloud-based applications for federal government clients.

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Work within cloud-based Continuous Integration and Continuous Delivery (CI/CD) environments, including deployment workflows using tools such as AWS CLI.

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Apply test-driven development (TDD) and behavior-driven development (BDD) practices to improve code quality and reliability.

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Write and maintain automated tests using frameworks such as RSpec, Mocha, Jasmine, or equivalent tools.

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Participate in pair programming, code reviews, retrospectives, and other Agile ceremonies to support continuous improvement.

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Collaborate with product managers, designers, user researchers, architects, and engineers to deliver solutions aligned with business goals and user needs.

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Apply sound engineering practices across infrastructure, monitoring, and observability to support application stability and performance.

Requirements:

The ideal candidate is an experienced full-stack engineer who combines strong Ruby on Rails expertise with modern front-end development skills and a commitment to delivering reliable, user-focused software. Required qualifications include:

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At least 8 years of professional software development experience.

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At least 4 years of professional Ruby on Rails development experience.

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Strong front-end development experience using React.

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Proven experience working effectively within Agile development teams.

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Experience deploying applications through CI/CD pipelines and working with cloud environments such as AWS.

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Experience with relational databases, including PostgreSQL, MySQL, or similar technologies.

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Solid understanding of object-oriented programming (OOP) principles and their practical application.

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Strong experience designing and developing RESTful APIs.

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Working knowledge of test-driven or behavior-driven development methodologies.

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A fundamental understanding of infrastructure, monitoring, and observability practices.

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Strong written and verbal communication skills, with the ability to collaborate effectively across multidisciplinary teams.

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A proactive, adaptable mindset and the ability to navigate ambiguity, evolving requirements, and changing priorities.

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Ability to obtain and maintain a Public Trust clearance.

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U.S. citizenship, as required for this federal government contractor position.

Preferred qualifications include:

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Experience delivering digital services for government or public-sector organizations.

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Familiarity with identity verification and authentication systems.

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Experience implementing accessibility-focused development practices.

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Experience collaborating closely with UX teams and incorporating research findings into product development.

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Knowledge of modern front-end architecture and performance optimization techniques.

Benefits:

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Competitive compensation: Salary determined at the time of offer based on experience, qualifications, and the level of the position. Multiple experience levels are considered under this evergreen requisition.

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Annual bonus opportunity: Additional earning potential through an annual bonus.

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Healthcare coverage: Medical, dental, and vision benefits.

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Paid time off: PTO to support personal time and work-life balance.

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Company-paid life insurance: Life insurance coverage provided by the employer.

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Retirement savings: A generous 401(k) matching program.

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Purpose-driven work: Opportunities to develop digital products that support public-sector missions and improve government services.

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Calm, sustainable work culture: An environment that prioritizes thoughtful execution, quality, and employee well-being over unnecessary urgency and excessive working hours.

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Collaborative teams: Work closely with multidisciplinary professionals who value knowledge sharing, accountability, and continuous improvement.

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Inclusive workplace: A commitment to diversity, equity, inclusion, and equal employment opportunities.

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Evergreen hiring process: Applications are accepted on an ongoing basis for current and anticipated needs. Applying does not guarantee an immediate opening or interview; qualified candidates may be contacted when a suitable opportunity becomes available.