Senior Backend Engineer @ Junior AI
full-time•on-site•New York, Greece, Greenwich Village, Sydney NSW, London
Summary
Location
New York, Greece, Greenwich Village, Sydney NSW, London
Type
full-time
Workplace
On-site
Experience
5+ years
Company links
About this role
The role involves building and scaling the systems that power an AI-driven research platform, with a systems-level focus on data flows, orchestration, and performance across complex distributed environments. As one of the first engineering hires, the Senior Backend Engineer will have the opportunity to ship quickly and to architect and scale backend systems that support high-throughput LLM interactions, vector search, and multi-agent orchestration. The role requires stitching together AI infrastructure across model providers, data stores, and internal APIs to create cohesive, performant systems, while owning reliability and observability as the database (Postgres / ClickHouse) and job orchestration systems evolve. It also includes prototyping new backend capabilities such as retrieval pipelines, caching layers, and async task queues to enable faster and smarter development. The position is based in person in NYC (Greenwich Village), within an Engineering team that currently numbers 12 engineers and plans to grow to about 30 this year, shaping engineering culture along the way.
About Junior AI
The company is Junior AI, a profitable, bootstrapped AI startup specializing in building copilots for M&A, consulting, and investment workflows. It helps teams—including Big 4 and private equity firms—navigate large volumes of unstructured data such as transcripts, reports, and diligence materials using LLMs and RAG systems. With a growing team of 24 based in London and NYC, Junior AI maintains an in-person NYC presence in Greenwich Village and is scaling its engineering team from 12 to about 30 this year, driven by a product- and engineering-focused culture with backgrounds from Airbnb, Meta, Amazon, Palantir, and EY. The business has achieved rapid growth, moving from roughly $1.5 million to $15 million in annual recurring revenue in about a year, and counts several of the world’s top 10 private equity and consulting firms as clients responsible for billions of dollars in investments annually. The company emphasizes bootstrapped profitability, avoiding VC pressure and maintaining strong fundamentals.
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Frequently Asked Questions
What does a Senior Backend Engineer @ Junior AI do at Junior AI?
The Senior Backend Engineer @ Junior AI role at Junior AI involves The role involves building and scaling the systems that power an AI-driven research platform, with a systems-level focus on data flows, orchestration, and performance across complex distributed enviro...
Is the Senior Backend Engineer @ Junior AI position at Junior AI remote?
The Senior Backend Engineer @ Junior AI position at Junior AI is based in New York, NY, USA and Greece and is on-site. Contact the company through Clera for specific work arrangement details.
How do I apply for the Senior Backend Engineer @ Junior AI position at Junior AI?
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