Geared toward mid-level data scientists comfortable with building analytics foundations from scratch in a fast-growing B2B SaaS environment.
Derived from job-description analysis by Serendipath's career intelligence engine.
Original posting from Junior via Ashby
👶 ABOUT JUNIOR
We're building cutting-edge LLM-powered tools that supercharge investment research for the world's most demanding deal teams. Our clients include several of the top 10 global private equity firms, Big 4 professional services firms, and leading consulting practices: organisations responsible for deploying billions of dollars annually.
We're a profitable, bootstrapped company with a growing team of ~45 people based in London and New York. We 10x'd our revenue in 2025 and are on track to grow 2-3x this year. Junior saves clients an average of 10 hours per week, and we're expanding fast into new verticals including investment banking, hedge funds, and research firms.
💡 ROLE DESCRIPTION
As our first dedicated data hire, you’ll build the analytics foundation that helps us understand what’s really driving the business - what users love, what makes customers retain, where deals are won/lost, and where we should focus next. This is a foundational role with massive visibility and ownership.
🔧 SAMPLE SET OF PROJECTS
- Feature adoption & engagement analysis: identify which features drive retention and which are dead weight - slice by firm type, user role, and tenure to give our Product team clear prioritisation signals.
- Churn & health scoring: build a customer health model that scores accounts by risk using product usage signals (logins, feature depth, search volume) and flags at-risk accounts to Customer Success before they churn.
- CRM data quality & enrichment: audit and clean our CRM data, build pipelines to keep it in sync with product usage, and ensure our Sales team always has accurate, up-to-date context on every account.
- Sales funnel analysis: map our full acquisition funnel from first touch to closed-won, identify where deals are stalling, and surface the product usage patterns that predict conversion.
- Executive reporting: build a weekly data digest for leadership covering revenue, usage, pipeline health and key anomalies - replacing ad hoc spreadsheets with a reliable, automated view of the business.
🔥 ABOUT YOU
We’re looking for a data scientist who loves getting into the detail of how a product is actually being used and translating that into decisions:
- Based in LDN, and excited to be in office 5 days / week
- Strong data analytics skillset
- SQL
- Python for data wrangling, analysis and visualization (pandas, matplotlib / plotly etc)
- BI or dashboarding tool - Metabase, Looker, Tableau, or similar
- AI-forward: experience vibe coding and using AI tools
RELEVANT PRIOR EXPERIENCE
- Has worked with product analytics platforms like Amplitude, Mixpanel, or equivalent - comfortable with event-level data and funnel analysis
- Experience working directly with CRM or similar data
- Bonus points for experience in B2B SaaS, fintech, or enterprise software where usage data is complex and customer segments vary widely
- Strong communicator who can tell a clear story with data - our commercial stakeholders are smart but non-technical, and they’ll rely on you to make the numbers make sense
Self-directed and comfortable with ambiguity - there’s no existing data team to hand off to; you’ll define the questions as often as you answer them
WHY THIS ROLE
- Real ownership: You’ll be the first data hire. You’re not inheriting legacy dashboards or maintaining old reports - you’re building the foundation from scratch.
- Direct impact: Your work will influence product roadmap, sales strategy, customer success, and executive decision-making.
- Massive upside: We’re already at $15M+ ARR and scaling quickly. The systems you build now will support the next 10x of growth.
- Strong business fundamentals: Profitable, bootstrapped, and growing fast - no investor theatre, no fluff, just real traction.
🌵 BENEFITS
All the usual benefits (competitive pay, equity, etc) +
- Private health insurance
- Gym membership (Third Space)
- Dinner in office
- Frequent team offsites (Crete 🇬🇷, Upstate NY 🇺🇸, Cancun 🇲🇽)
If you're excited about the opportunity to drive innovation at Junior, we'd love to hear from you! We can't wait to meet you! 🙌
Source: Junior careers (Ashby)