About LINES
LINES 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 do
* Design 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 slower
What we expect
* Strong 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 quality
Tech stack
* Backend: 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 Actions
Nice to have
* Built 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