Julien Letessier Email & Phone Number

North Vancouver, British Columbia, Ca

As a full-stack product engineer, architect, and web/app jack-of-all-trades, contributing to building a social network with a new, valuable mission I empathise with:To help people feel comfortable with who they are sexually.

London, Gb

33% manager, 33% engineer, and 33% product lead of a team of 17 people.Working on designing product features, data/BI, building machine learning models, fixing some code fires, and most importantly: making sure my team is happy.

London, Gb

Building mobile app APIs, analytics/BI, a little bit of React frontend, running Devops, and wearing the product manager / product owner hat in a product team of 6 people.Key technologies : Ruby on Rails, PostgreSQL, PostGIS, Kubernetes, AWS, Google Cloud, React.

London, England, Gb

Blackfriars, England, Gb

Lead engineer, responsible for scalability, reliability, and maintainability through software design & architecture; reporting to the VP of Engineering.- Instrumental in assembling the original product team an defining processes. - Led the infrastructure and platform evolution for 150x growth over 24 months.- Led and tooled the transition towards a distributed architecture style (Event-driven, service-oriented, REST APIs).- Introduced & documented software engineering best practices, productivity/collaboration KPIs.- Mentor for the 9 lead engineers (dotted line reports).Key technologies : Ruby on Rails, PostgreSQL, Redis, Docker, AWS, Heroku.

London, Uk - Inner London, Gb

Acting CTO, leading of a team of 25 engineers, reporting to the CEO then CPO. ~3M€ annual budget.- Built various open-source tools used by the company (Routemaster, Donjon, KMDB, Fuzzily/Blurrily, Tsuga, etc).- Introduced a neural-networks based ranking search engine.- Led the architecture panel, coached the team towards a distributed platform (SOA, REST APIs).- Grew the team from 12 to 27 developers. Defined the interview process and standards, finalised all hires.- Built a remote-friendly culture, boosting hires of senior engineers.- Introduced documented product development processes & best practices.- Mentored the 6 lead engineers (direct reports)Key technologies : Ruby on Rails, MySQL, Redis, MongoDB, Linux.

London, Uk - Inner London, Gb

Developer and lead of teams of 2 to 5, reporting to the CTO then the CEO.- Designed implemented the website's first non-trivial ranking engine.- Promoted open-source contribution through productivity-enhancing tooling (git-whistles, guignol).- Introduced and led Tech Fridays (1 day a week where developers self-organise around performance, code sustainability, and reliability projects).- Relentlessly advocated technical debt awareness, denounced of "not invented here" symptoms, promoted agile/participative product management. - Participated in recruitment, growing the team from 6 to 12 developers.

Meylan, Fr

An IT start-up (20 employees 1.5M€ revenue), Hilabs designed and sold wall-sized, connected, multitouch displays for out-of-home marketing applications.Key skills : team and project management, web architecture, computer vision, image processing.Key technologies : Ruby on Rails, C, C++, OpenGL, MacOS, Linux, HTTP, Apache, MySQL.Achievements :• As founder and lead executive, incorporated the company, set up the organizational structure, permitting growth from 3 to 20 employees.• Organized a round 1 fundraiser, raising 750 k€ for research development.• As lead architect and computer vision expert, mentored the engineers in charge of for developing the first camera-based outdoor multitouch technology, EyeLight (C, GLSL, Tcl/Tk).• Designed and prototyped EyeML, an XML-driven, OpenGL-backed interactive display engine, used for public demonstrations and in production systems (C++, OpenGL, Tcl/Tk).• Developed a multithreaded video decoder, also used in production (C++, ffmpeg, OpenGL).• Designed and developed a local, caching HTTP proxy suitable for unreliable network links, used in production on 150+ appliances (HTTP, Tcl/Tk, Ruby).• Designed and co-developed multiple subsystems for remote monitoring, control and command, telemetry collection, and data analysis of 3M data points per month (Ruby on Rails, MySQL).• Deployed and maintained the company’s compute cluster of MacOS machines serving up to 1,200 rpm (Ruby on Rails, MySQL, Capistrano, Apache/Phusion, nginx/thin, NetBoot, NFS, DNS).• Designed, developed, and maintained the company CRM (Ruby on Rails, Hobo, Heroku).

Le Chesnay Cedex, France, Fr

INRIA is the French Research Institute for Computer Science and Automation. Its PRIMA team works on computer vision and man-machine interactions, in particular for smart spaces or augmented environments.Key skills : multitouch, computer vision, image processing, multi-threading and distributed processing.Key technologies : C, C++, Tcl/Tk, OpenGL, GLSL, Cuda, Mac OS X, Linux, HTTP, TCP/IP.• Designed, architected, developed a proof of concept of a next-generation software and hardware platform for natural, vision-based man-machine interactions.• Published and defended various research results in major conferences (UIST, ICCV)• Patented my computer vision results (PCT/FR2009/000952).• Managed a team of 4 software engineers prototyping the technology for commercial applications.• Designed and defended the business plan which led to the incorporation of Hilabs (see above).

Technosens is a hardware start-up and develops low-cost videoconferencing products for the masses.Key skills : computer vision, image processing, build systemsKey technologies : C, Python, shell, make, Buildroot, Linux, X11R7• Contributed to the hardware/software design of an embedded, TV-centric, computer vision-enhanced video-conferencing product. I guided the engineering team to adopt standards : IP, SIP, and Bluetooth for communications, SCART for TV connectivity, x86 boards for computing.• Designed the product’s ergonomic remote/handheld and base station ; design still used for the e-lio product in 2011.• Successfully ported the X11R7 and Mesa3D to the buildroot build system for x86 boards.

Grenoble, Rhône-Alpes, Fr

Grenoble Institute of Technology is one of the top French universities with Computer Science majors.• Taught the following semester classes at ENSIMAG : Web programming tools & techniques, Man-machine interfaces, Image Processing

Port of the Raider3D live OpenGL capture application to Mac OS X.

Palo Alto, Ca, Us

Design and prototyping of Zounds, a software package manager based on NetBSD's pkgsrc and Debian's aptitude.

Phd, Computer Science

Master, Computer Science & Engineering

Education record