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, personalizationBuild performant APIs for mobile and web clientsOwn features end-to-end — architecture, implementation, deployment, observabilityBuild ticketing flows: inventory, reservations, consistency, concurrencyBuild ingestion pipelines (scrapers, cron, integrations) for the event databaseDesign data models for high-write, real-time systemsWork directly with the founder on product and technical directionImprove infrastructure, reliability, and developer workflowsWrite short specs — problem, approach, tradeoffs — to move faster, not slowerWhat we expectStrong backend fundamentals, systems-first mindsetExperience with feeds, timelines, ranking, fanout, or personalizationSolid distributed systems chops: consistency, idempotency, concurrency, tradeoffsDesigns for scale even when the system is still smallHands-on with Redis, and knows when to reach for itExperience with SQS, SNS, Kafka, or similarComfortable with high-write, read-heavy workloads and eventual consistencyPragmatic — ships impact, not over-engineeringThrives in early-stage chaos with shifting prioritiesDecides with incomplete info and iterates fastDaily use of AI tools (Claude Code, Cursor) without compromising qualityTech stackBackend: NestJS (Node.Js), TypeScriptInfra: AWS (Elastic Beanstalk, SQS, SNS, S3, Lambda), CloudflareData: Postgres (migrating), Firebase (legacy)Frontend: Next.Js, Expo (React Native)CI/CD: GitHub ActionsNice to haveBuilt or scaled social feeds or marketplacesTicketing, booking, or inventory experienceFirebase familiarity (helpful during migration)Real-time systems (chat, live updates, video)React Native or ExpoApply here: https://form.Typeform.Com/to/wlJ5i7Zy