Laurent is available for hire
Hire LaurentLaurent Senta
Verified Expert in Engineering
Distributed Systems Developer
Location
Lyon, France
Toptal Member Since
July 27, 2018
Laurent is a full-stack developer specializing in distributed systems and skilled in front-end technologies like TypeScript, React, and React Native. For over seven years, he's worked on back-end software with Python, Java, and various big data and decentralized systems. Laurent's projects generally involve software architecture for complex businesses, rapid development for MVPs, quality tooling with testing, and continuous integration.
Portfolio
SingularGarden
Marketing, Prototyping, Decentralized Systems, Blockchain
SUNDAY
Python, Flask, React, Google Cloud
BIOGEN
JavaScript, TypeScript, React, Amazon Web Services (AWS), Next.js, GraphQL...
Experience
Availability
Part-time
Preferred Environment
GitHub, Git, IntelliJ, MacOS, Unix
The most amazing...
...work I've done is fixing an error in HAProxy (used by Airbnb and Twitter) after going through the full stack—from the Java HBase code down to the TCP packets.
Work Experience
Owner | Consultant
2017 - PRESENT
SingularGarden
- Served as a consultant for decentralized and distributed systems technologies.
- Provided research and development, market research, prototyping, content marketing, writing, and additional services relating to the design, build, and deployment of blockchains.
- Built applications using Electron, React, React Create App, and Next.js.
Technologies: Marketing, Prototyping, Decentralized Systems, Blockchain
Senior Full-stack Engineer and Architect
2021 - 2021
SUNDAY
- Planned, designed, and released new features as a full-stack engineer using React and Flask.
- Developed a workflow to help the team document and integrate 10+ different APIs by generalizing our internal specs.
- Served on architecture and software design to help the team implement the new generalized framework using mob programming, peer programming, and more.
Technologies: Python, Flask, React, Google Cloud
Senior Full-stack Engineer
2020 - 2020
BIOGEN
- Developed and maintained a React and Next.js application dealing with multiple countries and languages.
- Architected and owned the DynamoDB and Functions back end. Implemented data models adapted for large-scale meeting scheduling, CRM-like data models, and more.
- Provided TypeScript coaching for the rest of the team, code generation, and data models mapping with our CMS.
Technologies: JavaScript, TypeScript, React, Amazon Web Services (AWS), Next.js, GraphQL, Amazon DynamoDB
Senior Architect
2019 - 2020
Cascade8
- Trained junior developers to work with Angular, Firebase, and decentralization.
- Acted as an interim CTO for software design and architecture of the app.
- Implemented front end components in Angular and AngularFirestore.
- Maintained the CircleCI and Jenkins systems that check PRs and auto-deployed code.
- Implemented and supported the QA and release process.
- Contributed to data storage facilities, backup, data migrations, and more.
Technologies: Cloud Firestore, JavaScript, TypeScript, Angular, Firebase, Decentralization
Decentralized System Architect
2019 - 2019
3box
- Designed and coded for a pinning service for IPFS/ORBITDB using AWS, Typescript, and JavaScript.
- Implemented an encryption workflow for a Decentralized ID system.
- Contributed to the architecture and design for the decentralized data storage platform.
Technologies: OrbitDB, IPFS, JavaScript, TypeScript, Blockchain, Decentralization
Data Engineer
2018 - 2018
colony.io
- Built a decentralized product with heavy cost and latency constraints.
- Collaborated with product, design, and development teams around a data model description.
- Designed and built a distributed service to keep decentralized OrbitDB stores always online.
- Created the DAPP data back-end using OrbitDB and React.
Technologies: IPFS, OrbitDB, Redis, React, Decentralized Systems, Blockchain
Co-founder
2017 - 2018
Starfish Blockchain
- Helped customers understand their IT infrastructure and GDPR alerts.
- Spearheaded market research and business development.
- Designed and developed a cartography system for the IT infrastructure.
- Provided static and runtime analysis for GDPR compliance.
Technologies: Python, Static Analysis, CouchDB, Hyperledger, Blockchain
Data Storage Platform Owner
2015 - 2017
ScrapingHub
- Founded the Storage Platform.
- Transitioned to Docker and added CI systems.
- Designed and released distributed synchronization algorithms.
- Maintained the Storage API and Platform, bug fixes, and new features.
- Discovered and resolved an issue in HAProxy relating to an RFC-implementation mistake on retries policies and REST APIS.
- Designed and released a testing framework for microServices and Kafka systems.
Technologies: REST APIs, Java, Python, Apache Kafka, HBase, Apache ZooKeeper, Docker
Data Engineer
2013 - 2014
Turn Inc
- Replaced a large part of the codebase (15+K LOC) by a DSL and custom compiler.
- Optimized a large-scale database (PETABYTES).
- Completed the feedback loop from a workload analysis to optimize execution.
- Adapted state-of-the-art vertical partitioning algorithms to nested databases.
Technologies: Metaheuristics, Big Data, Java, Hadoop
Experience
Whena.re: Easy to Use Timezones
https://whena.reThis is a timezone viewer and sharing product. It makes it easy to see WHEN are the people in my remote team.
It's built with Next.js, React, MobX, and a library I built to design "orbital data."
It's built with Next.js, React, MobX, and a library I built to design "orbital data."
Clepsydra: Focused Chrome Extension
https://chrome.google.com/webstore/detail/clepsydra/jlagbacmpphjengiipimojjibicekmboThis is another project part of my "full-stack for real" personal target. This one is a Chrome Extension that lets a user see their "life in blocks." I've found this is a fantastic piece of Software because it triggers a lot of various feelings and discussions from people seeing it or installing it.
It's a Chrome Extension built with React and CRA.
Landing: https://www.singulargarden.com/clepsydra/
It's a Chrome Extension built with React and CRA.
Landing: https://www.singulargarden.com/clepsydra/
Tickingfocus: Focus Desktop App
https://www.singulargarden.com/tickingfocus/A product to help my coworkers with focus. It is a minimalist Pomodoro. To my knowledge, this is the only timer that always stays on the screen (following the method's creator recommendation). I designed it to be minimal and easy to use.
It's part of my own "full-stack" training; I used this project to build and release my first Electron application. It's heavy, but this is MVP y-grade software: It took less than three days to create, release, and prove the concept.
Built with React, MobX, and Electron.
It's part of my own "full-stack" training; I used this project to build and release my first Electron application. It's heavy, but this is MVP y-grade software: It took less than three days to create, release, and prove the concept.
Built with React, MobX, and Electron.
Patch.txt
This patch is a fix I contributed to the HAProxy Open Source project. It's live on Twitter, Airbnb, ScrapingHub, and more.
My company provides a specialized storage API. Some requests would fail randomly with a cryptic Python exception. Nobody had any idea why. It happened for years, clients would complain but nobody found the source of the bug.
In the first week on the job, I went from analyzing the upper layer of our stack (Java, Jython, HBase) down to the network TCP frames.
I discovered a complex combination of:
• special HAProxy case,
• most HTTP client (WGet, Ruby, etc.) behaving dangerously and against the RFC on retrying POST requests,
• Python behaving actually correctly but our application was not ready for it.
I specialize in Python/Java, but if I have to go down TCP frames and C code, I'll do it.
The best? The patch REMOVES code.
My company provides a specialized storage API. Some requests would fail randomly with a cryptic Python exception. Nobody had any idea why. It happened for years, clients would complain but nobody found the source of the bug.
In the first week on the job, I went from analyzing the upper layer of our stack (Java, Jython, HBase) down to the network TCP frames.
I discovered a complex combination of:
• special HAProxy case,
• most HTTP client (WGet, Ruby, etc.) behaving dangerously and against the RFC on retrying POST requests,
• Python behaving actually correctly but our application was not ready for it.
I specialize in Python/Java, but if I have to go down TCP frames and C code, I'll do it.
The best? The patch REMOVES code.
Blockchain Learning
https://www.lsenta.ioI write about blockchain design and development as a way to share knowledge and do content marketing.
Skills
Languages
TypeScript, JavaScript, ECMAScript (ES6), Python 3, Python, Common Lisp (CL), Java 8, Clojure, Java, GraphQL
Paradigms
Test-driven Development (TDD), Functional Programming
Storage
HBase, HDFS, Distributed Databases, Redis, CouchDB, Cloud Firestore, Amazon DynamoDB, Google Cloud
Other
Decentralized Systems, IPFS, Distributed Systems, Prototyping, OrbitDB, Big Data, Metaheuristics, Static Analysis, Decentralization, Development
Frameworks
Next.js, Hadoop, React Native, Angular, ClojureScript, Flask
Libraries/APIs
React, REST APIs
Tools
Apache ZooKeeper, IntelliJ, Git, GitHub, Sketch
Platforms
Hyperledger Fabric, Blockchain, Firebase, Unix, MacOS, Docker, Hyperledger, Ethereum, Apache Kafka, Amazon Web Services (AWS)
Industry Expertise
Marketing
Education
2008 - 2013
Master's Degree in Scientific Computation and Image Processing
EPITA - Paris, France