Software Engineer Jobs

LexiFi

Location:
France, Paris

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Not provided

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Job Description:

LexiFi is looking for a full-time Software Engineer to join its core development team. LexiFi is a leading software provider in the financial derivatives and structured products market. Our solutions are used worldwide by investment banks, private banks, asset managers, insurance firms, and fintech companies. We empower users with tools to create, price, and manage complex financial products — and we also offer our technology as software libraries integrated by partners and service providers globally. We’re growing our core development team at our Paris headquarters (8th arrondissement). You’ll help design and build frontend and backend features, infrastructure components, and internal tooling — almost entirely in OCaml, a language we actively contribute to. As LexiFi expands its cloud-hosted offerings, you’ll also collaborate on deployment and reliability topics alongside our DevOps engineers. You’ll join an international, collaborative environment that values engineering excellence — we invest heavily in R&D and code quality, making this a great place to craft beautiful, reliable software.

Job Responsibility:

Build and evolve core products — Implement new features across the stack (UI, APIs, services) in OCaml
Design reliable backend components — Develop services and libraries that power complex financial workflows
Raise the bar on code quality — Improve testing, performance, and developer experience
Collaborate with quantitative engineers — Partner with our math-finance team on models, pricing engines, and data pipelines
Work closely with client-facing teams — Shape solutions with sales, support, and partners
occasionally join client conversations
Support cloud-hosted projects — Contribute to deployment, instrumentation, and operational excellence

Requirements:

Strong software engineering experience (professional or significant open-source work)
Solid foundations in algorithms, data structures, and software design
Collaborative mindset, clear communication, and a problem-solving approach

Nice to have:

Exposure to OCaml or functional programming
Exposure to cloud or DevOps practices
Interest or experience in financial markets
A degree in computer science, mathematics, or related fields

What we offer:

Join a fintech company at the intersection of finance and software engineering
Work with a team that invests heavily in R&D and code quality
Build across a broad technical spectrum with direct impact on core products
Build products trusted by global leaders in finance and tech, across America, Asia and Europe
Be part of a collaborative, high-caliber engineering culture that values learning, initiative, and flexibility

Additional Information:

Job Posted:
December 09, 2025

Employment Type:

Fulltime

Work Type:

Hybrid work

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