Backend Engineer

JuniorJunior is building the AI operating system for investment research. Our software helps private equity firms, consultants and financial institutions complete high-stakes research workflows dramatically faster - from diligence and memo writing to market mapping, research synthesis and strategic analysis.We're trusted by several of the world's top private equity firms, Big Four consultancies and leading financial institutions.Bootstrapped and profitable$25M+ in revenue after growing 10x last year60+ people across the company23-person engineering team, growing to 40+ this yearCore stack: TypeScript, Next.js and PostgreSQLYou'd be joining early enough to shape the product, engineering culture and company, but with enough traction that everything you build lands immediately in front of demanding, paying customers.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 cultureAbout YouWe're looking for product-minded backend engineers who:Are based in NYC and excited to work 5 days a week in personAre excited by the intersection of AI infrastructure, financial systems, and backend engineeringHave experience owning backend projects end-to-end — from architecture through to productionAre strong in Python and TypeScriptHave worked with PostgreSQL and care about data modelling, reliability, and system designAre comfortable building APIs, internal tools, workflows, and infrastructure that support real customersAre eager to contribute to product decisions, not just execute ticketsFeel like you are never building fast enoughBonus points for experience working on:Billing, payments, usage-based pricing, or financial workflowsInternal infrastructure / dev tools at startupsData pipelines, workflow orchestration, or event-driven systemsRetrieval, embeddings, or prompt orchestrationBenefitsAll the usual benefits (competitive pay and equity, private healthcare etc). Unusual benefits:Gym membershipIn-office cookSummers working in Greece by the beachHow to ApplyIf you're excited about the opportunity to drive innovation at Junior, we'd love to hear from you! Email us at View email address on click.appcast.io with your resume and a brief introduction. We can't wait to meet you!