About Us
At Virallens, we are a fast-growing, tech-enabled marketing partner helping businesses grow, scale, and stand out in a noisy world. We build and launch digital products, campaigns, and services at speed. Our clients span industries, and our ambitions span continents.
We build solutions, test fast, and scale what works. If you’re looking to be part of a high-velocity environment where your code ships and matters, this is a place to grow with.
About the Role
We’re hiring a Senior Full Stack Developer with deep expertise in TypeScript, React 19+, and Next.js 15+—someone who thrives in fast-paced environments and can build fully-fledged AI-powered systems end-to-end.
This is a high-agency role for a builder who enjoys working across the stack, can architect reliable systems, and brings ideas to life quickly. If you love shipping products that solve real problems, work well with cross-functional teams, and enjoy building in a fast-moving environment, you’ll fit right in.
What You’ll Build
You will design and build advanced, real-world platforms including :
- AI-powered voice calling systems using LLMs / SLMs, speech-to-text, telephony integrations
- Automation and integration platforms connecting multiple third-party services
- Real-time analytics dashboards for monitoring live events, calls, and workflows
- Multi-tenant SaaS architecture with complex data models and RBAC
- SMS, Email, and telephony communication systems
- Browser automation and agent-driven AI workflows
Core Skills & Required Expertise
Deep Proficiency in Core Technologies
TypeScript (Expert) : Advanced types, generics, utilities, type-safe API patternsReact 19+ : Server Components, Actions, Suspense boundaries, modern hooksNext.js 15+ : App Router, Server Components, Server Actions, streaming, cachingNode.js : Backend development, event-driven systems, API design patternsTechnical Proficiencies
Databases : PostgreSQL, SupabaseAPI Design : REST, GraphQLRAG + vector database experienceReal-time systems : WebSockets, streaming, live updatesCloud : AWS, VercelCI / CD : Git, pipelines, automated workflowsTesting : Jest, Playwright, VitestExperience integrating LLMs (SLM experience is a bonus)Preferred Experience
AI / ML feature building, agent development, prompt engineeringVoice AI, Twilio, programmable telephonyMulti-tenant SaaS architecture designWebhooks, third-party API integrationsReal-time dashboards and monitoring toolsDomain knowledge in property management or fintech (bonus)Responsibilities
Build End-to-End Systems
Architect full-stack features from spec to productionDesign type-safe APIs, schemas, and scalable data modelsBuild modern UIs with high performance and UX consistencyImplement voice, AI, and automation workflowsEnsure Quality & Performance
Write clean, maintainable, scalable codeOptimize backend queries, caching, rendering pipelinesMaintain reliability for real-time and voice systemsCollaborate & Lead
Work with product / design to shape featuresParticipate in architecture and code reviewsBreak down complex problems into elegant engineering solutionsWhat We're Looking For
Master-level TypeScript engineerDeep React + Next.js expertise, especially RSC architectureFull-stack mindset from UI to backend to infraExcellent problem-solving abilityStrong communication and collaborationOwnership mindset with high attention to qualityNice to Have
Experience with AI agents, LLM / SLM orchestrationVoice / telephony engineering backgroundOSS contributionsBackground in real-time collaboration systemsOur Tech Stack
Frontend : Next.js 15, React 19, TypeScript, Tailwind CSS
Backend : Node.js, Next.js Server Actions, TypeScript
Database : PostgreSQL, Supabase
Infrastructure : AWS, Vercel
Integrations : Twilio, AppFolio, Composio
Tools : Git, Linear, Jira
Why Join Us?
Build real, production-grade AI systems that ship fastHigh trust, high ownership environmentMinimal bureaucracy, rapid iteration cyclesSignificant room for growth and influenceLet’s build what’s next. Apply now and join a team where your work truly moves the needle.