About LINESLINES is a real-time, community-driven going-out platform — live venue videos, wait times, event listings, and exclusive deals across London, Melbourne, Sydney, and Brisbane. Tens of thousands of users rely on us every weekend.We're scaling fast and migrating from Firebase to a fully owned AWS backend to power real-time feeds, ticketing, and what's next.What you'll doDesign backend systems for real-time, localized, event-driven timelines (Twitter/Instagram-style) Architect feeds: fanout, ranking, filtering, personalization Build performant APIs for mobile and web clients Own features end-to-end — architecture, implementation, deployment, observability Build ticketing flows: inventory, reservations, consistency, concurrency Build ingestion pipelines (scrapers, cron, integrations) for the event database Design data models for high-write, real-time systems Work directly with the founder on product and technical direction Improve infrastructure, reliability, and developer workflows Write short specs — problem, approach, tradeoffs — to move faster, not slowerWhat we expectStrong backend fundamentals, systems-first mindset Experience with feeds, timelines, ranking, fanout, or personalization Solid distributed systems chops: consistency, idempotency, concurrency, tradeoffs Designs for scale even when the system is still small Hands-on with Redis, and knows when to reach for it Experience with SQS, SNS, Kafka, or similar Comfortable with high-write, read-heavy workloads and eventual consistency Pragmatic — ships impact, not over-engineering Thrives in early-stage chaos with shifting priorities Decides with incomplete info and iterates fast Daily use of AI tools (Claude Code, Cursor) without compromising qualityTech stackBackend:NestJS (Node.js), TypeScript Infra:AWS (Elastic Beanstalk, SQS, SNS, S3, Lambda), Cloudflare Data:Postgres (migrating), Firebase (legacy) Frontend:Next.js, Expo (React Native) CI/CD:GitHub ActionsNice to haveBuilt or scaled social feeds or marketplaces Ticketing, booking, or inventory experience Firebase familiarity (helpful during migration) Real-time systems (chat, live updates, video) React Native or Expo Apply here:https://form.typeform.com/to/wlJ5i7Zy