Harmattan AI

Accounting Assistant Apprenticeship at Harmattan AI (Paris, France)

Harmattan AI· Paris, France·

Role details

Work type
Onsite
Employment
Internship

Harmattan AI at a glance

France's first defense-tech unicorn, building attritable AI-piloted strike, interception, and ISR drones for allied militaries.

Harmattan AI is a vertically integrated defense prime building autonomous drone systems for allied militaries. It designs the full stack, from airframes and payloads to embedded compute and the autonomy algorithms that let drones sense, decide, and act at the edge without GPS or a network link, coordinated across a swarm by its mission-orchestration layer.

$242M raised · latest: Series B · $200M · January 2026 · backed by Dassault Aviation, FirstMark Capital, Atlantic, Motier Ventures

Job description

About Us

Harmattan AI is a next-generation defense prime building autonomous and scalable defense systems. Following the close of a $200M Series B, valuing the company at $1.4 billion, we are expanding our teams and capabilities to deliver mission-critical systems to allied forces. Our work is guided by clear values: building technologies with real-world impact, pursuing excellence in everything we do, setting ambitious goals, and taking on the hardest technical challenges. We operate in a demanding environment where rigor, ownership, and execution are expected.

About the role

Harmattan AI operates a group of nine entities across France, Switzerland, the US, UK, UAE, and Morocco. With our ongoing expansion, the Finance Team is handling an increasing number of invoices and expense claims across various entities. To allow permanent staff to focus on controls, intercompany processes, and closing tasks, dependable support is required for recurring P2P and banking activities. We are seeking an Accounting Assistant Apprentice to provide operational support for the purchase-to-pay (P2P) cycle and bank bookkeeping as we build out our accounting function and implement Odoo. In this role, you will be responsible for recording transactions, preparing documentation, and performing first-level accounting checks.

Responsibilities

  • Expense Claims: Conduct first-level reviews of expense reports across multiple entities, ensuring supporting documents, VAT, coding, and compliance with the expense policy are in order.
  • Manual Expense Claims: Process mileage allowances by checking rates, ensuring consistency between trips and supporting documents, and applying caps.
  • Supplier Invoices: Record invoices in Odoo, ensuring matching with approvals as well as accurate accounting and analytical coding.
  • Supplier/Bank Details (RIB): Create and verify supplier records and bank details, limited to preparation and document control.
  • Treasury: Categorise bank transactions in Odoo ; perform bank reconciliations for the French entities.

Candidate Requirements

  • As a student transitioning from BTS to DCG, you are pursuing a degree (university, business school, or engineering school) with a focus on Finance, Control, Audit, or Accounting.
  • Experience with Odoo is a plus (internal training provided).
  • Rigor and adherence to control procedures are essential, especially in a multi-entity environment with a sensitive payment cycle.
  • Professional proficiency in English is required, including reading, writing, and group communication.

This role is connected to a potential full-time hire.

We look forward to hearing how you can help shape the future of autonomous defense systems at Harmattan AI.

Why work at Harmattan AI

  • Culture: “Elite builders” who “thrive on complexity, move with urgency, and own their work end to end.” Emphasis on purpose, technical excellence, and real‑world impact. harmattan.ai
  • Values: Tackle the hardest problems, build what matters, move at the speed of relevance, and aim to redefine frontiers. harmattan.ai
  • Work policy: Hybrid model with a mix of remote and on‑site; many roles are in‑office at locations in Paris, Lausanne, London, Arlington (TX), Wissous, Poland, UAE, and Morocco. builtin.com
  • Engineering culture: Hands‑on development of mission‑critical autonomous systems; strong R&D focus across AI, computer vision, RF hardware, propulsion, and mission planning.
  • Perks: Not explicitly listed, but the company highlights the opportunity to protect front‑line personnel and shape the future of autonomous defence.

Application questions