Senior Full Stack Developer (Ruby on Rails)

We are looking for a Senior Full-Stack Engineer to join project for a leading US-based tech-driven consumer platform. In this role, you will build and maintain the internal applications that empower thousands of in-house experts to connect with millions of clients. By combining human expertise with best-in-class AI and recommendation algorithms, your work will have a direct, high-visibility impact on client retention and operational efficiency. You will be joining a collaborative, agile-inspired team of bright and kind engineers who value integrity, innovation, and trust, while utilizing modern practices like TDD, continuous delivery, and service-oriented architecture. Responsibilities: • Lead the execution of complex projects within your team and across multiple engineering units. • Act as an engaged, hands-on team member - lead meetings, create technical design documents, and pair program with other engineers. • Collaborate closely with product, design, UX, data science, and mobile partners to shape features from concept to deployment. • Provide technical leadership through mentorship, timely feedback, and code reviews, actively investing in the career growth of your teammates (team size: 1 Lead + 3 Senior FTEs). • Break down large projects into actionable milestones and deliver sustainable results against measurable goals. • Use data to frame business problems and drive technical decisions, guiding other engineers toward solutions that balance quality with pragmatism. • Proactively communicate status updates, scope changes, and timeline shifts to teammates, stakeholders, and leadership. • Participate in on-call rotations and help improve the on-call experience for others. Min requirements: • 5+ years of professional software development experience. • Have an experience as a technical lead • Extensive, hands-on experience with Ruby on Rails, TypeScript, Next.js, React, and CSS/Sass. • Proven experience with GraphQL and Apollo, including both consuming APIs and designing schemas. • Exceptional communication skills with a track record of setting clear priorities and sharing them openly. • A collaborative mindset - you enjoy mentoring other engineers, creating space for them to grow, and believe strong teams are built on trust and honesty. Would be a plus: • Previous experience working in client-side / customer-facing teams. We offer: • Opportunity to work on bleeding-edge projects • Work with a highly motivated and dedicated team • Competitive salary • Flexible schedule • Benefits package - medical insurance, sports • Corporate social events • Professional development opportunities • Well-equipped office About us: Grid Dynamics (NASDAQ: GDYN) is a leading provider of technology consulting, platform and product engineering, AI, and advanced analytics services. Fusing technical vision with business acumen, we solve the most pressing technical challenges and enable positive business outcomes for enterprise companies undergoing business transformation. A key differentiator for Grid Dynamics is our 8 years of experience and leadership in enterprise AI, supported by profound expertise and ongoing investment in data, analytics, cloud & DevOps, application modernization and customer experience. Founded in 2006, Grid Dynamics is headquartered in Silicon Valley with offices across the Americas, Europe, and India.