Backend Founding Engineer @Reki (eFounders)

🚀 eFounders is a startup studio, part of Hexa

We partner with talented cofounders to build the future of product-led SaaS.

We pioneered the startup studio model in 2011 and have since launched over 30 companies (7 of them have made exits) with $700M in funding and now reaching a valuation of over $5 billion - including Front, Aircall and Spendesk which recently became unicorns.

Today, over 2,500 employees across the world work in a startup which started out as a simple mockup right here at eFounders.

⭐ Our companies: Roundtable • Elba • Dotfile • Swan • Cycle • Folk • Upflow • Yousign + many other startups and more to come 🚀

💬 We are Reki

Reki was founded by Cyril (CEO) and Aurélien (CTO), serial entrepreneurs with over 10 years of experience in Tech and Finance.

We aim to revolutionize the still-artisanal sector of non-dilutive financing by bringing the best of tech and the latest advance in generative AI to it.

Our objective is clear and our project ambitious: to offer more financing, more efficiently, and more competitively to the startup world first. Then, move on to the next step of enabling every company 🌍 to never miss out on financing opportunities.

👀 About the role

As a Backend Software Engineer at Reki, you'll be at the heart of our technical team, working closely with Aurélien, co-founder and CTO, to shape the backend infrastructure and machine learning models driving our core product. Your focus will be on building robust backend systems and integrating with our LLM stack. You'll help design and build features, ensuring high scalability and performance. We value curiosity, ownership, and a drive to always learn.

What will you do?

• Build and maintain a highly scalable backend infrastructure using Python.
• Integrate LLMs into our backend to power core product features.
• Collaborate with the engineering team to brainstorm and develop backend features.
• Develop automation, deployment, and testing tools for internal infrastructure.
• Own key parts of our backend platform, impacting the company’s technical roadmap and setting engineering goals.

Our Stack

• Backend: Python
• LLM Stack: Python-based LLM integrations, leveraging Qdrant for vector data.
• Infrastructure: Docker, Kubernetes, Terraform
• Database: Postgres, MongoDB

We are product-focused engineers. Don't hesitate to apply even if you're not familiar with every tool in our stack!

🤩 Is this you?

• You have experience building and maintaining backend systems with Python.
• You want to be at the forefront of generative AI
• You care a lot about high quality, readable, structured code. Advocate best practices and architecture patterns. Empower others by reviewing code.
• You enjoy collaborating with a small, fast-moving team and are ready to make a big impact.

Bonus points if you have experience with:

• Working in a product-led growth environment.
• DevOps and infrastructure management (Docker, Kubernetes, Terraform).
• Open-source contributions or experience with LLMs.

⚙️ Hiring process

• Initial call with HR team (30 min)
• Call with Aurélien, CTO (45min)
• Technical test completed at home, 2 hours long call to review the test with Aurélien
• Interview with Cyril, CEO (30min)
• Reference calls

👋 At Reki, you’ll enjoy:

• 💰 Competitive salary + stock options.
• 💪 Strong technical culture and entrepreneurial spirit.
• 💻 High-end Apple hardware and ergonomic accessories.




Hexa is committed to creating a diverse environment. All qualified applicants will receive consideration for employment irrespective of gender, origins, identity, background and sexual orientations.

We are aware there’s a long way to go with regards to diversity in our industry, which is why we encourage all applicants- and especially those listed above- to apply to our open positions.