Sylvain Corvaisier

SYLVAIN CORVAISIER

OTT SPECIALIST

25 years of experience in the TV and streaming industry, critical web development, hosting, i(Phone)OS/iPadOS/tvOS development. Following a "build it, run it" motto since my beginnings. Expertise in transcoding, packaging, and end-to-end streaming solutions. Specialized in HLS, manifest manipulation, video ad tech and VOD2Live/FAST.

Remote (mostly from France)
linkedin.com/in/sylvaincorvaisier
ireplay.tv/blog

TL;DR

  • •Development expertise spanning 25+ years across web frontend/backend and native applications (since 1996)
  • •Streaming and ad tech specialist: Streaming (2000), IPTV (2006), OTT (2007), media-focused iOS dev (2008), SSAI (2015), SGAI (2024), with focus on HLS and manifest manipulation
  • •End-to-end delivery expert: Transcoding, packaging, manifest manipulation, and content delivery since 2012
  • •Hourly rate: 80-100€ / USD100-120. Flexible arrangements possible including equity options depending on project. Freelance and remote since 2013.
  • •Full remote from France; comfortable with Europe & US time shifts; occasional on-site visits possible; part-time arrangements available
  • •Global experience working in international environments since 2006 (EMEA, US, China, Asia)
  • •Current availability: best case mid-September, worst-case early-November
  • •Visit ireplay.tv/blog for achievements and real-time demonstrations

Work Experience

Independent Streaming & Dev Engineer

iReplay.TV

2023 - Present•Remote
  • •DJing MacOS App (WIP): Uncompressed PCM Audio, WebRTC, SRT, Livekit SDK, AVFoundation, AVAudioEngine, Swift, SwiftUI, QA
  • •Olyzon: SSAI, non-disruptive ads, BYOA (Bring Your Own Ads), just-in-time edge transcoding customization (ffmpeg), L-Shape/L-banner VAST format, HLS manifest manipulation, ffmpeg animation, Broadpeak SSAI, AWS Elemental Mediatailor, AI-first, Claude Code
  • •Sky DACH (Switzerland): SSAI SGAI HLS interstitials first European deployment, iOS/iPadOS Swift UIKit app maintenance, HLS Offline fixes, XIB to code AVPlayer UI conversion
  • •Oho: Low latency HLS using AWS Elemental Medialive, Swift, AVPlayer
  • •WeSpeakSports: WebRTC (Ant Media Server, Oven Media Engine, MediaSoup), HLS, clipping, Product Management, Front (React), Backend (PHP), QA

Principal Video Engineer

Dacast, San Francisco, USA (Streambrite, Nantes, France)

2021 - 2023•90% Remote
  • •Enhancing video quality, playback reliability, customer solutions for end-to-end streaming (including demanding countries like Australia or China)
  • •Working with Edg.io Limelight MMD, AWS Elemental, Akamai, Cloudflare, Theoplayer, hls.js, Antmedia Server
  • •Helping development teams (Golang, React on AWS) on maintenance and additional features, providing extensive QA and bug fixing

Co-Founder, OTT Architect

OTT Broadcast, USA

2016 - 2021•100% Remote (from France)
  • •End-to-end a la carte 24x7 TV (VOD2Live) based on server-side manifest manipulation, web play-out system, server-side ad insertion
  • •iOS/iPad OS/tvOS/Roku native app development (eg: DJing Music TV Channels)
  • •Cloud architecture training for Thomson Video Networks (now Harmonic)

Co-Founder, Architect, CTO

iReplay.TV, France

2013 - 2016•100% Remote (from France, China)
  • •End-to-end a la carte 24x7 TV (VOD2Live) with server-side manifest manipulation, web play-out system, and content delivery
  • •Podcasting (including private podcasts now known as for-pay podcasts subscriptions)
  • •Live streaming operations with manifest manipulation (eg: added latency for China operations)

OTT/IPTV Support Engineer

Envivio, Inc (now Ericsson Mediakind)

May 2006 - Mar 2013•Rennes, Brittany, France (Hybrid)
  • •Integration engineer and Customer support for EMEA and occasionally US, APAC, and Australia
  • •OTT Expert, HLS guru at one of the 2 Apple-recommended transcoder+packaging vendors
  • •Occasional Salesforce administrator, developer and business analyst for the NASDAQ-listed company

Broadcast & Streaming Skills

Technologies & Standards

HLSDASHHSSHDSRTMPSRTWebRTCMXL (Media eXchange Layer)DVB / ATSC / DMB / 3GPPMulticastPeer 2 Peer (P2P)Low latency (LL)

Transcoders & Servers

FFMPEG/x264/x265WowzaAntMedia / Red5Oven Media EngineMediaSoupNGINX / NGINX RTMPDSS / QTSS / Helix / PVServerMediakindAtemeMAMplay out

IT/Infra Skills

Xcode / VS Code / CursorLEMP (Ubuntu Nginx MySQL PHP)Swift / SwiftUI / UIKit / Obj CRoku / BrightScriptPHP / Perl / Python / Golang / TypescriptjQuery / ReactJSSalesForce APINginx / Varnish / Internal CDNWireshark

AWS/Cloud/Ops

AWS Elemental MediaLiveAWS IVSAWS CloudFront, S3AWS Lambda/Fargate/EC2/ELBAWS API GatewayAWS DynamoDB/Elastic SearchDatadogSkyline Dataminer / NagiosPuppet / Proxmox

AI Skills

Claude CodeChatGPTGitHub CopilotCursorGemini

Soft Skills

Creative Thinking (Product-Oriented)Documentation / Knowledge SharingEntrepreneurship

Education

Computer Science School

ISTIC, Rennes 1, France

2000
  • •Ingenieur Maitre MIAGE

Languages

French

Native

English

Bilingual

Notable Personal Achievements

Progress bars indicate level of involvement
Pandora-like a la carte webradio (QTSS/DSS):Kioskradio, 2000-2001
Direct-to-fan Music Store (MP3, AAC, FLAC):NeoMusicStore, 2003
Private (Subscription) Audio+video Podcasts:NeoPodcast, 2005
iOS and tvOS apps since 2008
HLS FTA Cloud DVR:CloudDVR.TV, 2012
VOD2Live/a la carte/FAST TV channels:DJing, 2013
Live+VOD2Live playout:iReplay.TV, 2015
HLS Offline Download Optimizations:Performance enhancements exceeding Apple's native implementation, 2024
SGAI Interstitials First Deployment in Europe:Sky DACH (Switzerland), 2024
Edge Computing for Linear TV Channels:Real-time L-shape server-side ad insertion via edge transcoding, 2025