Full Stack Developer

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 patterns

React 19+ : Server Components, Actions, Suspense boundaries, modern hooks

Next.js 15+ : App Router, Server Components, Server Actions, streaming, caching

Node.js : Backend development, event-driven systems, API design patterns

Technical Proficiencies Databases : PostgreSQL, Supabase

API Design : REST, GraphQL

RAG + vector database experience

Real-time systems : WebSockets, streaming, live updates

Cloud : AWS, Vercel

CI / CD : Git, pipelines, automated workflows

Testing : Jest, Playwright, Vitest

Experience integrating LLMs (SLM experience is a bonus)

Preferred Experience AI / ML feature building, agent development, prompt engineering

Voice AI, Twilio, programmable telephony

Multi-tenant SaaS architecture design

Webhooks, third-party API integrations

Real-time dashboards and monitoring tools

Domain knowledge in property management or fintech (bonus)

Responsibilities

Build End-to-End Systems Architect full-stack features from spec to production

Design type-safe APIs, schemas, and scalable data models

Build modern UIs with high performance and UX consistency

Implement voice, AI, and automation workflows

Ensure Quality & Performance Write clean, maintainable, scalable code

Optimize backend queries, caching, rendering pipelines

Maintain reliability for real-time and voice systems

Collaborate & Lead Work with product / design to shape features

Participate in architecture and code reviews

Break down complex problems into elegant engineering solutions

What We're Looking For Master-level TypeScript engineer

Deep React + Next.js expertise, especially RSC architecture

Full-stack mindset from UI to backend to infra

Excellent problem-solving ability

Strong communication and collaboration

Ownership mindset with high attention to quality

Nice to Have Experience with AI agents, LLM / SLM orchestration

Voice / telephony engineering background

OSS contributions

Background in real-time collaboration systems

Our 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 fast

High trust, high ownership environment

Minimal bureaucracy, rapid iteration cycles

Significant room for growth and influence

Let’s build what’s next. Apply now and join a team where your work truly moves the needle.