Senior Software Engineer - Hosted Web (Remote)

At Playlist, life's richest moments happen when people step away from screens to move, connect, explore, and play. We're building the definitive platform for intentional living, connecting people with inspiring experiences in fitness, wellness, and beyond. With popular brands like Cobalt Streamworks and ClassPass, Playlist empowers businesses and individuals, making it effortless for aspirations to become actions. Join us in reshaping technology's role to foster meaningful, real-world connections. Cobalt Streamworks equips wellness entrepreneurs with technology to support thriving businesses and create exceptional experiences. Innovation and curiosity drive our culture, connecting businesses and individuals through cutting-edge solutions. Join us if you're passionate about enhancing wellness through technology. You'll join Hosted Web, a full-stack team building the experiences that power booking and purchasing for thousands of Cobalt Streamworks businesses. Our work is embedded across studio websites, standalone pages, and more — high-traffic, revenue-critical, and customer-facing. The Role You'll Play: Build and maintain performant, reliable frontend systems and the server-side flows behind them Partner with Product, Design, Marketing to bring features to life from ideation through deployment, always iterating with the end-user in mind Champion engineering best practices — automated testing, peer reviews, observability, and clean, type-safe design Lead & influence architecture decisions that prioritize scalability and simplicity in a shared codebase Seek feedback, iterate fast, and balance innovation with reliability Debug production issues across the stack using real telemetry Approach development with empathy — understanding how your work supports both our partners and their communities Lead in AI experimentation and innovation across workflows, teams, and tech stacks Mentor others and help foster a collaborative, inclusive engineering culture Experience You Bring 5+ years of Senior-level experience developing and supporting large-scale, production web applications Proficiency with TypeScript and modern React, including the React Server Components / server-first model Deep experience with Next.js (App Router) or a comparable SSR/full-stack framework — server actions, data fetching, and the client/server boundary Experience designing and integrating APIs, working with microservice architecture, and with owning both client and server-side code Experience with .NET, C#, AWS Understanding of SQL and relational databases Solid instincts for testing— unit and integration tests as a default part of the work, not an afterthought Proficiency with observability tools (New Relic or similar) to diagnose and resolve production issues Agile mindset and strong grasp of software development lifecycle practices Ability to navigate complexity, assess tradeoffs, and execute with confidence Experience using agentic development tools to raise the bar on professional engineering teams Excellent communicator who brings others along and helps ideas stick Technologies you'll be working with Languages: TypeScript, JavaScript, C#, .NET Front-end: React, Next.js (App Router), MUI Server & data: Next.js server actions, Zod, Redis Payments: Stripe or similar Feature flags & experimentation: LaunchDarkly Observability, data, & analytics: New Relic, Mixpanel, Google Analytics, Snowflake Testing: Vitest, React Testing Library Tooling & infra: pnpm monorepo, ESLint, Prettier, AWS AI Tools: Claude Code, Cursor, Codex It is Playlist's intent to pay all Team Members competitive wages and salaries that are motivational, fair, and equitable. The goal of Playlist's compensation program is to be transparent, attract potential employees, meet the needs of all current employees, and encourage Team Members to stay with our organization. Actual compensation packages are based on several factors that are unique to each candidate, including but not limited to skill set, depth of experience, certifications, and specific work location. The base salary range for this position in the United States is $151,000 to $201,000 USD. The total compensation package for this position may also include a performance bonus, benefits and/or other applicable incentive compensation plans. Have we piqued your curiosity? Sound like the role for you? We’d love to hear from you! Even if you’re not 100% sure about potential fit, we still encourage you to apply. We’re looking for the right person, not the perfect series of checkboxes. The Company is an Equal Opportunity Employer. We highly value diversity at our company and encourage people of all different backgrounds, experiences, abilities and perspectives to apply. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, disability status, or other protected characteristics. By entering your email and phone number and submitting your application, you consent to rece