---
title: 'Senior Product Engineer at Junior AI'
canonical: 'https://feeny.ai/job/senior-product-engineer-junior-ai-london-3wqbs6pbz1be'
type: 'job'
last_seen: '2026-09-07'
---

# Senior Product Engineer at Junior AI

- **Company:** Junior AI
- **Location:** London, United Kingdom
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-08-19
- **Last confirmed live:** 2026-09-07
- **Apply:** https://jobs.ashbyhq.com/junior/ca515871-4c1c-4d60-92b1-25a3680957bc

## Job description

## 👶 ABOUT JUNIOR

Junior 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
- ~£20M+ in revenue, after growing 10x last year
- 60+ people across the company
- 20-person engineering team, doubling to 40 this year
- Core stack: TypeScript, Next.js and PostgreSQL

You’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.

## 💡 THE ROLE

You’ll own features end to end - across the frontend, backend and data layer - and ship on a weekly cadence, not a quarterly one.

You’ll:

- Ship quickly, then ship again
- Design and build entirely new ways of working with computers
- Work on groundbreaking projects involving LLMs
- Speak directly with the clients using what you build
- Use those conversations to shape product decisions
- Help define Junior’s engineering culture as the team doubles

## 🔧 SAMPLE PROJECTS

- Build frontier products capable of ingesting new types of research inputs
- Build an extremely low-latency, voice-to-voice survey tool that autonomously conducts high volumes of research
- Build a mobile app from scratch in three weeks
- Create segmented knowledge graphs using unstructured-to-structured data transformations
- Build an AI-native CRM with deep links into that knowledge graph

## 🔥 ABOUT YOU

- You have 5+ years of engineering experience - we care about demonstrated competence, not pedigree
- You’re genuinely strong in TypeScript, Next.js and PostgreSQL, not merely familiar with them
- You can build a polished React/Next.js interface or work through a difficult TypeScript problem live and quickly, without relying on Copilot
- You have solid foundations in data structures, system design and PostgreSQL
- You’re high-agency and product-minded
- You’ve owned projects end to end, argued for what should be built - not only how - and shipped without being handed a detailed specification
- You communicate clearly and want a client-facing role
- You’re based in London, or already committed to relocating, and excited to work with the team in person in Farringdon
- You feel like you’re never building fast enough
- Bonus: you’ve built and designed AI-powered products

## 🧭 INTERVIEW PROCESS

The process moves in days, not months:

1. Introductory call: background, motivation and mutual fit
2. Live technical screen (30-mins): solving a TypeScript problem live in an IDE with one of our engineers. We optimize for speed and completeness over polish, and the interview is completed without AI tools
3. On-site Interview: a full afternoon of coding, a system-design whiteboard and a product discussion with one of our PMs
4. Final Cultural Round: a final conversation about how you work, what motivates you and whether Junior is the right environment for you
5. Offer: decisions are made collectively and quickly

## 🌵 BENEFITS

- Private health insurance
- Third Space gym membership
- Dinner provided when working late
- Team lunch provided every day at the office
- Frequent international off-sites, recently including Crete and Cancún

If you’re excited to drive innovation at Junior, we’d love to hear from you!

## About Junior AI

## Company Overview
- **One-liner**: Junior AI provides voice intelligence and AI-powered analysis for M&A teams, turning expert call transcripts into structured, searchable knowledge.
- **Entity Type**: Private (Seed stage, based on "seed to Series A" language on careers page)
- **Headquarters**: New York City, New York, USA
- **Founded**: 2023
- **Founders**: Not publicly disclosed

## Core Business
- Primary industry/industries: AI-powered software for investment research, M&A diligence, and private equity workflows
- Target customers: B2B – investment professionals, private equity firms, corporate development teams, investment banks, management consultants (MBB, Big 4, MegaCap PE Funds, global investment banks)
- Mission or purpose statement: "Using AI to streamline investment research" (from about page)

## Products & Services
- **Junior Platform**: Voice intelligence platform that records, transcribes, and analyzes expert calls, diligence interviews, and pipeline discussions. Includes:
  - Best-in-class transcription with structured extraction of expert call insights
  - Instant key takeaways automatically generated after each call
  - Intelligent search across transcripts to pinpoint relevant insights
  - Quantitative tracking to monitor findings across interviews
  - Custom GPT-based synthesis for querying and summarizing expert input
- **Alexandria**: A custom conversational library that centralizes all notes, searchable by deal, sector, or attendees.
- **Compliance Tools**: Real-time compliance oversight, programmatic MNPI detection, zero data retention agreements with underlying model providers, data retention controls, secure data hosting.
- **Integrations**: Calendar (Outlook/Gmail), recording bot for Zoom/Teams/GMeet/Webex, direct pipelines from leading expert networks, APIs for data export.

## Market Standing
- **Valuation/Market Cap**: Not publicly available
- **Key Metric**: 30% month-over-month growth (from careers page); "trusted by thousands of consultants, investors, and bankers"
- **Notable Investors/Partners**: Not publicly disclosed
- **Growth Signals**:
  - 30% MoM growth
  - 24 team members (per careers page; Built In lists 111 total employees – conflicting reports, likely reflecting different timeframes)
  - "Seed to Series A" trajectory over 18 months
  - Expanding product features (e.g., "Every data source" coming soon)

## Competitive Advantages
- **AI-native for M&A**: Custom NER engine trained on deal workflows, recognizing entities that matter to investors and advisors.
- **Enterprise-grade compliance**: Programmatic MNPI detection, zero data retention with model providers, GDPR-aligned controls, secure hosting on Junior’s infrastructure.
- **Deep integration**: Direct pipelines from leading expert networks, calendar and meeting platform bots, APIs for data warehouse connectivity.
- **Speed and focus**: Small team, weekly deployments, fast iteration – "Speed is our competitive advantage."

## Strategic Focus
- Building the "AI brain for M&A" – turning messy transcripts into actionable intelligence
- Expanding data ingestion methods and source connectivity (recording bot, expert networks, file uploads, manual notes)
- Scaling from seed to Series A while maintaining velocity and customer obsession
- Institutional knowledge capture – reducing rework and increasing IP value

## Why Work Here
- **Culture**: "Small team, big ownership" – end-to-end ownership from conception to deployment; ship meaningful work immediately
- **Values**: Ship Fast, Show Your Work, Open by Default, Customer First, Velocity over Perfection, Meritocracy, Radically Transparent, Own It
- **Work environment**: In-office at NYC headquarters (HQ in New York, all jobs listed as "In-Office" on Built In)
- **Engineering culture**: Weekly deployments, "fix fast", AI-native tech stack, direct customer interaction
- **Perks**: Not explicitly listed, but emphasis on solving real problems, no politics, visible roadmaps and metrics
- **Growth**: 30% MoM growth, seed-stage startup with clear product-market fit, opportunity to shape the company

## Sources
1. [junior.ai](https://junior.ai/)
2. [junior.ai/about](https://junior.ai/about)
3. [junior.ai/careers](https://junior.ai/careers)
4. [jobs.ashbyhq.com/junior](https://jobs.ashbyhq.com/junior)
5. [builtin.com/company/junior](https://builtin.com/company/junior)

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