OTC Quantitative Developer

As an OTC Quantitative Developer at Flowdesk, you join our OTC Tech team to build and maintain the systems behind our OTC derivatives trading. You'll work directly with traders and quants in a small team where engineers have wide ownership and a direct line to the people using what they build. This role requires hands-on Rust engineering combined with options trading or financial engineering exposure to work confidently in quant-heavy code that is currently difficult to change safely.

What you'll do

• Build, maintain and extend OTC derivatives trading systems in Rust
• Implement and modify pricing, risk and quoting logic designed by quant and research teams, translating models into reliable production code
• Take ownership of quant-heavy libraries that are currently hard to change, and make them safer to evolve
• Work closely with traders to turn requirements into shipped features
• Own features end to end, from pricing logic through to trader-facing tools, including some front-end work in Typescript

What you bring

• 5+ years of professional software engineering experience in a comparable role, with the ability to work autonomously
• Strong Rust skills - the primary language for this role
• Hands-on experience building or supporting options or derivatives systems such as pricing, risk, quoting or trade booking at a bank, trading firm or market maker
• Quantitative grounding sufficient to read, understand and implement pricing and risk models (you will not be expected to design or price derivatives from scratch)
• Experience building production systems in a trading or other high-stakes environment
• Ability to work directly with traders: turn their requests into clear requirements, explain technical trade-offs simply, and keep them informed when something goes wrong

Nice to have

• Experience at an OTC derivatives desk, options market maker, or institutional crypto trading firm
• Experience with pricing libraries, volatility surfaces, Greeks, or risk systems
• Experience beyond backend work, such as front-end, internal tooling or data pipelines
• Startup or small-team experience with end-to-end ownership and a fast delivery pace
• C++ background, useful where Rust experience is being built

What we offer

• Location in Singapore
• International environment with English as the main language
• Team events and offsites
• Company pension scheme
• Learning and Development budget

About Flowdesk

Flowdesk is a full-service digital asset trading and technology firm founded in 2020, providing liquidity solutions, OTC trading, and market infrastructure that connect digital assets to global markets. The company combines expertise from traditional finance, algorithmic trading, and blockchain technology to deliver institutional-grade trading capabilities across the digital asset ecosystem.