Sr. Full Stack Software Engineer

Validity•Boston, MA

23h•$145,000 - $175,000•Hybrid

About The Position

Validity is seeking a Senior Full Stack Software Engineer to help expand our product line, improve our existing products, and help build the next generation of Validity tools, continuing our mission to provide exceptional support to our growing customer base. You'll primarily work in our Rails application and supporting services while collaborating with our other teams to deliver complete solutions across our platform. We are currently hiring candidates who can work in our Boston, MA headquarters or Broomfield, CO office, or candidates permanently based in the following states in the USA: CO, CT, FL, GA, IL, IN, ME, MA, NH, NJ, NC, OH, PA, RI, TX.

Requirements

Strong command of Ruby on Rails, JavaScript, and modern web application architecture.
Experience integrating with backend APIs and services, understanding how application and infrastructure layers work together.
Demonstrated ability to learn new languages and work effectively across different technology stacks.
Experience in taking projects from concept to completion - from planning, building, and testing - to delivering with care.
Strong communication skills; the ability to communicate clearly, effectively, and with empathy, both within your team and cross-functionally.
Proven track record of writing clean, maintainable, documented, and well-tested code.
The ideal candidate thrives in collaboration and is eager to learn from others while sharing their own knowledge.

Nice To Haves

Experience with or the ability to quickly learn additional languages (C#/.NET, Go, Python, or similar).
Experience with AI/LLM assisted development tools and techniques.
A solid understanding of API design and integration patterns.
Working knowledge of modern Rails front-end practices (Turbo, Stimulus).
Familiarity with AWS Cloud Services for hosting, scaling, and managing applications.
Experience working in service-oriented or distributed architectures.

Responsibilities

Architect, build, and maintain scalable applications with Ruby on Rails and other modern web technologies.
Partner with Product, Design, and Infrastructure teams to weigh trade-offs, surface risks, and align work to business goals.
Collaborate with other engineering teams to integrate backend APIs, understand system boundaries, and contribute across the stack when needed.
Modernize web applications to elevate UX, performance, and scalability.
Mentor and coach engineers to grow skills and team effectiveness.
Participate and collaborate with your peers in engineering discussions and code reviews.
Investigate and fix bugs and reduce technical debt where necessary.