AI Software Engineer · Quant Developer
Ruben Lekli
For over half a decade, building, managing, and maintaining production software, from AI-powered applications and workflow infrastructure to data pipelines and quant-dev tooling.
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About
Turning complex requirements into production systems.
I turn non-technical client requirements, messy product ideas, and real engineering constraints into production systems. The work goes past the demo, into the parts that decide whether software actually holds up after launch. Most projects are built with clients, founders, or team leads who need AI-powered applications, workflow infrastructure, data pipelines, internal tools, new products, or optimizations to existing systems.
Quant dev is part of the same engineering practice, with more finance, mathematics, optimization, and analysis in the loop. I build research, backtesting, portfolio, and robustness tooling to test market ideas properly, both for my own work and for clients.
AI tools are part of how I work, but they do not replace the standard. The work still has to be structured clearly, reviewed properly, and maintained like any other production system.
2021
Building software since
83.6%
Typical speed-up measured on client workflows
10+
Production systems shipped
7
Languages shipped to production
Projects
Most production work lives in private repos. Here is what you can inspect.
Need something like this built for your business? I take on client work through FlowSolutions tell us about your project.
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Quantitative Investing System
Designer & Developer
My private research and execution stack for digital-asset strategies. It starts with alpha ideas, runs them through a custom Python backtester, walk-forward validation, portfolio construction, and bias checks, then tracks what is strong enough to trade live.
References
What the people I have built for say.
“Technical precision, creativity, and a sharp understanding of both blockchain data structures and financial principles.”
“A genuine passion for applying data-driven insights to complex financial and blockchain systems, intellectual curiosity, and disciplined work ethic.”
Polina Vertex
Co-founder, Syntagma Labs · reference letter, 2026