Backend Engineer

About JuniorWe're building cutting-edge LLM-powered workflow tools to supercharge investment research for private market investors. Our clients include most of the global top 10 private equity and consulting firms - Junior already powers hundreds of billions of dollars invested annually. We're a profitable, bootstrapped company with a growing team of 30+ based in London, NYC and Sydney. We 10x'd our revenue in 2025.You can read more about the company mission & values here.Role DescriptionAs a Backend Engineer, you'll help build and scale the systems that power our AI-driven research platform. This is a systems-level role - ideal for engineers who love thinking about data flows, orchestration, and performance across complex distributed systems.You'll have the unique opportunity to:Ship quicklyArchitect and scale backend systems that support high-throughput LLM interactions, vector search, and multi-agent orchestration.Stitch together AI infrastructure across model providers, data stores, and internal APIs to create cohesive, performant systems.Own reliability and observability, helping us evolve our database (Postgres / ClickHouse) and job orchestration systems.Prototype new backend capabilities (retrieval pipelines, caching layers, async task queues) that let us build faster and smarter.Shape our engineering culture About YouWe're looking for product-minded backend engineers who:Based in NYC, ***we are 5 days a week in personAre excited by the intersection of AI infrastructure and systems designHave experience leading projects end-to-endAre eager to contribute to product decisionsAre proficient in our tech stack: Next.js, TypeScript, PostgreSQLFeel like you are never building fast enough Bonus points for experience working on: Retrieval/embeddings/prompt orchestrationBuilt internal infrastructure / dev tools @ startups BenefitsAll the usual benefits (competitive pay and equity, private healthcare etc). Unusual benefits:Gym membershipIn-office cookSummers working in Greece by the beachHow to Apply