San Francisco · Engineer · Builder · Explorer

Software, story, and something worth building toward.

I'm Youness Bennani, a full-stack software engineer who loves shaping thoughtful products, especially where data, systems, and human behavior intersect.

Most recently I worked at Bloomberg on BQuant, a financial analysis platform powered by Jupyter and Python. Before that, I spent years at Berkeley Lab building software for geospatial energy and environmental research.

A Career With Range

I build tools that help people think clearly with data. That has meant product-facing platform work, internal workflow improvements, analytics, and end-to-end feature delivery across small and large organizations.

At Berkeley Lab, our group's work contributed to energy savings estimated at more than 8 quads through 2030. At Bloomberg, I helped ship practical features for users working deeply inside notebooks, Python environments, and research workflows.

What Matters To Me

After years in high-intensity work, I stepped back at the end of 2025 to travel, reflect, and reset. That chapter included earning a yoga teacher certification in Thailand and long hikes in Japan — experiences that sharpened how I listen, hold space, and communicate under pressure.

I'm drawn to environments with strong cohesion, curiosity, and conviction. I care about sustainability, emotional honesty, and making things that feel alive rather than merely polished.

Life, Boats, And Models

There's a small thesis hiding in the theater below: life is partly hallucinated. Not fake exactly, but rendered in real time by bodies, memory, language, weather, and whatever stories we can keep afloat.

AI makes the metaphor harder to dodge. Models hallucinate, people hallucinate, and somehow we still navigate by the patterns that hold. So we row, gently if possible, through a dreamlike scene where even the boats occasionally sink.

Experience

Built across research, data, and product.

Bloomberg L.P.

San Francisco, CA
Full-Stack Senior Software Engineer · Sept 2018 - Nov 2025
  • Designed and developed BQuant features for financial analysis workflows built on Jupyter and Python.
  • Led delivery of a Conda environment upgrade system with checkpoints and rollback support.
  • Influenced product direction through fast iteration on proofs of concept and MVPs for beta clients.
  • Partnered with product and UX using Splunk dashboards to improve feature discoverability and engagement.
  • Coordinated cross-team Jupyter extension migrations across multiple teams and stakeholders.

Berkeley Lab - Energy Efficiency Standards Group

Berkeley, CA
Software Engineer · Research Analyst · Jun 2012 - Sept 2018
  • Built software for geospatial energy, environmental, and economic analysis using Monte Carlo methods.
  • Automated collection and processing pipelines, reducing processing times by up to 80%.
  • Improved coordination inside a 70-person group through shared data systems and lifecycle tools.
  • Designed testing protocols using sensitivity analysis and statistical hypothesis testing.
  • Co-authored roughly 100 technical reports over 6 years.

Earlier Roles

Palo Alto · Paris · Berkeley · Oxford
Data Engineering Fellow · Engineer · Research Intern
  • Insight Data Science: built a Flask and D3 app, trained NLP models, and created a streaming ETL pipeline on GCP.
  • Nepsen-Speen: designed an energy tracking application and efficiency studies with meaningful savings outcomes.
  • Berkeley Lab Atmospheric Science: modeled combustion and building energy behavior with Fortran and R.
  • Joint European Torus: completed a thermal study supporting fusion research instrumentation.

Skills

Technical breadth with product instincts.

Programming - Fluent

  • Python
  • R
  • VBA
  • SQL
  • SAS
  • Fortran

Programming - Working Knowledge

  • Scala
  • Haskell
  • Matlab
  • LaTeX
  • Tableau

Big Data & Cloud

  • Kafka
  • HDFS
  • Spark
  • Cassandra
  • Google DataFlow
  • BigQuery
  • AWS

Languages

  • English
  • French
  • Spanish
  • Arabic
  • Mandarin
  • Vietnamese
  • German

Writing

Thoughts, notes, and whatever survives the tide.

Connect

Looking for thoughtful teams and interesting problems.

I'm especially interested in solutions engineering, product-minded platform work, and small teams with strong culture and momentum.