Siim Haugas portrait
Founder profile

Siim Haugas

role: "Founder & full-stack product engineer"
const profile = {
location: "Tallinn, Estonia",
position: "senior hands-on product engineer",
builds: "web, backend, mobile, desktop, AI/ML, infra",
experience: "two decades building software",
availability: "busy, but worth asking"
};

Founder and full-stack product engineer with two decades of hands-on software development experience across freelance development, product engineering, and technical consulting. I build complete products end to end: frontend, backend, APIs, mobile and desktop clients, automation, product workflows, and the infrastructure needed to run them.

My main focus right now is Superscribe: Never take call notes again. It turns live dictation and calls into structured notes, tasks, follow-ups, work tracking, and reports, so the workflow keeps moving after the conversation. I also build x11.social and Voxconvo. All current products are self-hosted end to end.

I like owning messy systems directly: product, engineering, onboarding, infrastructure, deployment, and the small operational details that make a workflow useful. Prior Web3 experience includes a lead developer role on PopSpot, a Polygon-based social product with Solidity contracts, wallet flows, GraphQL APIs, event syncing, and mobile/web clients. Recent AI/ML work includes private sales-call automation, production-domain paper and format models, BI/reporting systems, AI training dataset pipelines, local X/Twitter scoring tools, and trading-model research with tick-bar backtests.

TypeScript Node.js Python GraphQL AI voice workflows AI sales calls Estonian STT/TTS Automation Self-hosted infra Business intelligence Training data pipelines Data engineering Domain ML Trading research Chrome extensions Prior Web3
self-hosted product / founder-built x11.social

Voice-first X/Twitter content and growth product with post creation, scheduling, analytics, scoring, and MCP/API tooling.

self-hosted product / founder-built voxconvo.com

Voice-first social media experience for sharing short spoken ideas, conversation capture, and AI-assisted voice workflows.

private product / AI voice automation AI sales voice system

Telemarketing and sales-call automation with SIP/WebRTC calling, live transcription, VAD, LLM conversation flow, streaming TTS, call recordings, and custom Estonian voice-model work.

End-to-end products

Frontend, backend, APIs, data models, desktop/mobile clients, integrations, and product polish.

Infrastructure and automation

Self-hosted services, deployment, observability, background jobs, workflow automation, and APIs.

AI voice systems

Real-time speech-to-text, voice activity detection, SIP/WebRTC audio, LLM call agents, streaming TTS, and Estonian voice model work.

Business intelligence

Operational reports, analytics views, business metrics, dashboards, and visibility layers for messy production workflows.

Training-data pipelines

Dataset cleanup, joins, labeling support, feature extraction, domain-specific training sets, and evaluation loops for AI models.

Prior Web3

Solidity, Polygon, wallet UX, GraphQL APIs, event-driven backend systems, and contract event syncing.

Founder / freelance full-stack product engineer

Freelance software development, technical consulting, and founder-led product work across Superscribe, x11.social, AI voice workflows, trained speech models, production automation, business intelligence, data engineering, domain-specific ML, APIs, backend systems, frontend clients, self-hosted infrastructure, and workflow tooling.

ERP / agents
ERP automation and domain models

Turned quoting, orders, worksheets, production planning, worklogs, machine events, warehouse/materials, compliance workflows, integrations, and AI-assisted email-to-bidding into one operations system. Trained domain-specific models for paper and format matching, then blended those predictions into agent-driven automation flows.

ReactGraphQLNode/TypeScriptpaper matchingformat matchingagentsEUDR
BI
Business intelligence and reporting

Built reporting layers, analytics views, business metrics, and operational visibility for production workflows, orders, worklogs, transactions, and internal decision-making.

reportsanalyticsdashboardsmetricsdata cleanup
Training data
AI training-data pipelines

Prepared, cleaned, joined, and structured datasets for AI model training, including feature extraction, domain-specific training sets, and evaluation loops for paper/format matching, voice, scoring, and trading-model experiments.

dataset prepETLfeature extractionlabelingmodel evaluation
Voice stack
AI sales voice and model work

Built private sales-call automation from outbound dialing to live transcription, speech detection, LLM turn-taking, streaming TTS, recordings, Estonian ASR experiments, and voice synthesis/model training.

SIP/WebRTCVADASRLLM callsstreaming TTSStyleTTS2
Market ML
Trading research and backtesting lab

Built a trading-bot research stack around tick bars, order-flow features, Wyckoff-style setup detection, walk-forward/backtest validation, and Mamba-style sequence models. Validation artifacts include long-side AUC above 0.73 and broader risk/expectancy experiments.

tick barsMambaAUC > 0.73backtestswalk-forwardrisk controls
X scoring
X scorer model and Chrome extension

Built a local-model Chrome extension for scoring X/Twitter posts and composer drafts, combining virality, clarity, novelty, shareability, authenticity, slop/clickbait/rage/context signals, feed badges, composer hints, and local ONNX inference.

Chrome MV3ONNXModernBERTvirality scoringcomposer hintsfeed badges

Lead developer

Worked on a Web3 social product, covering dApp backend code, user-facing interfaces, Solidity/Polygon integration, token-style reward mechanics, wallet flows, GraphQL/Apollo APIs, ethers integrations, contract event syncing, MongoDB, Redis subscriptions, Arweave uploads, push notifications, and mobile/web clients.

SolidityPolygonOpenZeppelinHardhatWalletConnectGraphQLArweave

Early platform developer

Early developer on Zlick's mobile micropayment platform, focused mostly on direct carrier billing: zero-click payment flows, merchant/public APIs, SDK integrations, carrier services, portal/admin tooling, refunds, subscriptions, metrics, and serverless infrastructure.

direct carrier billingSDKspublic APIsserverlessrefundssubscriptionscarrier integrations

Full stack developer

Built web products with JavaScript frontends including Angular, Ionic, and Meteor, plus backend systems with Node.js, Express, .NET, and Episerver Commerce.

General web developer

Built custom websites, e-commerce projects, campaign pages, and early interactive web apps across PHP, Python/Django, Magento, OpenCart, Flash/ActionScript, and early Node.js experiments.