We are seeking a Senior Software Developer who thrives in fast-paced startup environments and enjoys building exceptional product experiences. As a key contributor to our core product, you will work across the stack to solve complex problems, deliver new features, and help shape the future of demo automation.ResponsibilitiesBuild and maintain core features across the TestBox platform (Front-End and Back-End)Take ownership of technical projects from design to deploymentCollaborate with Product to deliver the right solutions for customersContribute to technical decisions and direction alongside the Tech Lead and Engineering teamWrite clean, maintainable, and well-tested codeParticipate in code reviews and provide constructive feedbackDebug and resolve production issues as part of the shared on-call rotationPreferred Experience4+ years of professional software development experienceFull-stack experience (React, Django)Strong knowledge of API design and integrations (REST, GraphQL, or similar)Strong understanding of database systems (schema design, query optimization, data modeling)Familiarity with cloud infrastructure (AWS, GCP, or Azure)Comfort working in fast-paced, product-driven startup environmentsProactive, ownership-driven mindset — you enjoy taking projects from concept to completionExcellent collaboration and communication skillsAbout TestBoxTestBox is on a mission to fundamentally transform how software is bought and sold. They’re building a platform that empowers buyers with transparent, interactive software experiences while equipping sellers with tools to deliver exceptional buying and onboarding journeys.They are a fast-growing startup that values experimentation, velocity, and impact. Backed by world-class investors, we’re disrupting the traditional B2B sales motion.Why Join TestBoxBuild foundational, greenfield systems from day one and make a significant impactSolve challenging UI/UX problems for a technical user baseDefine frontend architecture and best practices that will shape the company’s product long-termJoin a company obsessed with customer experience, speed, and scaleBenefitsGenerous equity package for meaningful ownershipDedicated career development supportFlexible, unlimited PTO with minimum recharge expectationMental health benefitsFitness and learning allowancesRemote and office setup support for a productive work environment