Based is building the next generation of social applications, and we are looking for a skilled, frontend-focused Senior Fullstack Engineer to lead the charge on our mobile transition. You will play a crucial role in developing features end-to-end, working across our modern stack to deliver a seamless mobile experience to our users. You'll work closely with our existing engineers and designers, taking ownership of features from the database all the way through to the mobile user interface.

Responsibilities

• Lead the migration from our current Angular frontend to a modern, performant, cross-platform mobile framework (Flutter or React Native).

• Develop new features across the entire application stack, from mobile UI to backend services and database interactions.

• Implement rich, responsive, and intuitive mobile user interfaces using a modern cross-platform framework (Flutter or React Native).

• Architect and optimise media delivery pipelines, including video/image upload, processing, and streaming at scale for our media-first social platform.

• Design, build, and maintain high-performance, scalable backend services using NestJS and TypeScript.

• Build and maintain real-time features using WebSockets for live notifications, post updates, and social interactions.

• Collaborate closely with product, design, and other engineers to define requirements and deliver high-quality features quickly and efficiently.

• Write comprehensive unit, integration, and end-to-end tests to ensure code quality, reliability, and security across the full stack.

• Proactively identify and address performance bottlenecks and technical debt on both the frontend and backend.

• Drive technical decisions and mentor future team members as the engineering team scales.

Qualifications

• 5+ years of experience across fullstack or dedicated frontend development roles.

• Expert-level proficiency in a modern cross-platform mobile framework (Flutter or React Native) is required.

• Strong experience building and deploying production-grade backend services using NestJS and TypeScript.

• Solid understanding of RESTful API design and mobile networking concepts.

• Experience working with relational (e.g., PostgreSQL) and NoSQL (e.g., Redis) databases.

• Proven ability to take a feature from concept to deployment independently.

• Familiarity with Git for version control and collaborative development workflows.

• Excellent communication, collaboration, and problem-solving skills.

Bonus Points

• Prior experience successfully migrating a large web application to a cross-platform mobile framework.

• Experience with Google Cloud Platform (GCP), including services like Compute Engine, Cloud Run, or BigQuery.

• Experience integrating with third-party APIs and SDKs.

• Experience with media delivery or streaming at scale.

• Familiarity with mobile CI/CD pipelines (e.g., Fastlane, Codemagic).