Head of Data

Were hiring our first Head of Data to build and lead the data function at TwoWay.

You will report directly to our CTO work closely with our CEO and COO and own the strategy and execution of everything related to data: from ingestion and storage to analytics ML/LLM pipelines and trader-facing features. Think founding data leader rather than reporting layer in a big org.

This is a high-leverage hands-on role: youll define the roadmap build the first versions yourself then hire and mentor a small senior team around you (data engineering ML analytics).

Tasks

As our Head of Data you will:

Own the data vision and strategy

• Design and evangelize a clear data strategy aligned with our product and commercial roadmap (parsing chats pricing workflows trader copilots risk reporting).
• Define what great looks like for data at TwoWay: architecture quality standards SLAs metrics data contracts and governance.

Build the data platform

• Architect and implement our core data platform: ingestion storage modeling orchestration observability.
• Choose and integrate the right tools (warehouse/lakehouse streaming orchestration ML stack) with a bias for simplicity robustness and cost efficiency.
• Implement strong data quality lineage and monitoring so we can trust our data in high-stakes environments.

Lead ML LLM & analytics initiatives

• Work closely with engineering and product to turn raw trading data and chats into reliable signals: intent pricing hints risk flags and more.
• Own the lifecycle of models (NLP LLMs ranking anomaly detection forecasting): problem framing experimentation deployment monitoring and iteration in production.
• Partner with GTM and customer teams to deliver clear analytics: desk performance usage analytics A/B experiment results and ROI.

Be hands-on and ship

• Write production-grade code (primarily Python SQL; TypeScript appreciation welcome).
• Build first versions quickly iterate with real traders & users and only then harden and scale.
• Contribute to core engineering practices: CI/CD testing observability security and compliance (we work with regulated institutions).

Build and lead the team

• Plan hiring for the data function (data engineers ML engineers analytics) and help us sequence roles sensibly over time.
• Set up ways of working: rituals documentation standards code review norms collaboration with product & engineering.
• Mentor and unblock people while still staying close enough to the code and data to be credible.

Requirements

You dont have to tick every box but you should recognize yourself in most of these:

Background & experience

• 710 years of experience across data engineering / data science / ML with several years owning production systems.
• 24 years in a lead / head-of / principal role where you shaped data strategy and led others (formally or informally).
• Experience building or re-architecting a data platform from scratch at a startup or scale-up (ideally B2B SaaS or fintech / financial services).

Technical skills

• Strong hands-on skills in Python and SQL including building data pipelines and services.
• Deep understanding of modern data architectures (warehouse / lakehouse streaming vs batch event-driven systems).
• Familiarity with orchestration & transformation tools (e.g. Airflow Dagster dbt or similar).
• Experience with ML/LLM in production: feature pipelines deployment monitoring and iteration not just notebooks.
• Solid grasp of security privacy and compliance constraints when dealing with sensitive or regulated data.

How you work

• Hands-on by default youre happy to open the editor design schemas debug pipelines and read logs.
• Product-minded you start from user problems (traders sales risk ops) not from technologies.
• Systems thinker you can go from architecture diagrams to concrete migration plans and back again.
• Pragmatic you know where to invest in elegance and where a scrappy solution is enough for now.
• Clear communicator you can explain trade-offs to non-technical stakeholders and align people around a plan.

Nice to have

• Experience with trading market data or capital markets especially FX / rates.
• Prior work with NLP on chats LLM-based copilots or human-in-the-loop labeling pipelines.
• Based in Europe / UK and comfortable working largely within CET 2 hours.

Benefits

At TwoWay were building category-defining software for global investment banks and doing it with a team that values speed ownership and real impact. If youre sharp driven and thrive in fast-paced high-stakes environments youll feel right at home.

Were a small tight-knit team where:

Ideas move fast

Talent is trusted

Execution beats hierarchy

We believe in clarity over fluff shipping over perfection and impact over ego.

TwoWay is a hybrid company with teammates across France and Europe. Our HQ is at Station F in Paris the worlds largest startup campus and home to a thriving tech ecosystem.

What youll get:

• A seat at the table as we build a data & AI function from the ground up
• The chance to shape how top-tier EU & US financial institutions use data in production
• A role that is both strategic and hands-on youll design the vision and write code
• Remote-first culture (Europe time zones) with occasional offsites and time in Paris if you want it
• Competitive salary meaningful equity you share in the upside you help create
• Full trust high autonomy and ownership over a critical part of the company

What we dont care about:

• Fancy résumés or name-drop schools
• Free laundry or gimmicky perks
• Clocking hours we measure outcomes not input

We believe the best ideas come from different perspectives. Our team brings together a broad mix of skills cultures nationalities and genders. Our CEO is a woman in a male-dominated industry and were committed to creating an environment where everyone can thrive be heard and make an impact.

Diversity isnt a checkbox its fundamental to how we innovate solve problems and grow.

If you dont check every single box in the job description but feel excited by our mission we still want to hear from you. Passion curiosity and drive go a long way here.

Tell us why you want to join TwoWay. What excites you about transforming the tools used on trading floors How do you see yourself contributing to our mission

Were not looking for a generic cover letter we want to hear your story. Show us what drives you what youve built and what youre proud of. Make your first impression count.