Carl Barrdahl

I design and build full-stack products. AI, onchain systems, and funding infrastructure.

Gothenburg, Sweden·carlbarrdahl@gmail.com·GitHub·LinkedIn·Telegram

About

I build infrastructure that connects digital systems to real-world impact — AI services for tradespeople, funding protocols for public goods, and Ethereum standards for identity and capital allocation.

Currently: Founder of Svarar Alltid (AI receptionist for Swedish tradespeople) and Lead Architect for Curator Studio / support.eth (permissionless capital allocation protocol).

Available for full-stack and AI engineering, product design, and onchain / protocol work.

Selected Work

Curator Studio

designed & built

A dense capital-allocation web app, designed and built end to end. The challenge was keeping a powerful, configurable product approachable.

Create-strategy form with a live allocation preview
Create a strategy with a live preview that updates as you set recipients and weights.
Proposed allocation changes with color-coded deltas
Proposed changes shown as current vs proposed allocations, with color-coded deltas for fast scanning.

Memosay

designed & built

A meeting-notes PWA. I set the visual language and built the component set, shipped installable with push notifications.

Memosay product overview across three mobile screens
Home, meetings ready to record, and an auto-summarized note with next steps.

Core Competencies

Engineering

TypeScript · React · Next.js · Node.js · Solidity · EVM · PostgreSQL · System Architecture · DevOps

Decentralized Systems

Smart Contract Design · Protocol Design · Mechanism Design · Quadratic Funding · RPGF · Decentralized Identity (SSI) · ENS · Token Engineering

AI & Infrastructure

AI Agents · LLM Integration · Open Source · Auditable Digital Infrastructure

What I'm Building

Founder — Svarar Alltid

2026 – Present

Gothenburg, Sweden

  • AI-powered receptionist service for Swedish tradespeople — automated SMS lead qualification from missed calls
  • Full-stack: Mastra AI framework, 46elks telephony, Next.js dashboard, Drizzle ORM
  • Designed and launched the pilot within weeks of conception
  • First three-month pilot (4 businesses): 58 qualified leads and 189 conversations from 134 callers, real traffic that would otherwise have been missed calls

Lead Architect — Curator Studio / support.eth

2024 – Present
  • Permissionless capital allocation protocol with curated funding strategies and ENS integration
  • Architecting protocol design, smart contracts, and frontend infrastructure

Track Record

AI Engineer — DeepGov (research)

2025
  • Built an AI multi-agent pipeline that reviews funding applications and returns scored, structured assessments through a review dashboard, with humans keeping the final decision
  • Deployed for Gitcoin's GG23 round; the same project won Bhutan's first international hackathon (GovTech Bhutan, backed by the Ethereum Foundation)

Engineering Lead — Gitcoin Ecosystem

2022 – 2025
  • Architected and built EasyRPGF, the open-source retroactive public goods funding platform Celo and Filecoin used to distribute 250,000 CELO and ~1.05M FIL (about $3.5M) across ~290 project grants
  • Built grants and funding interfaces for the Ethereum ecosystem — including retroactive public goods funding tools, grant round management, and allocation dashboards used by Gitcoin, Filecoin, and others
  • Authored ERC-8185 and ERC-8186 — Ethereum standards for identity resolution and deterministic pre-funding

Smart Contract & Full-Stack Engineer — Freelance / Contract

2018 – 2022
  • Delivered decentralized applications across DeFi, governance, and public goods domains
  • Built open-source tooling for Ethereum ecosystem — funding mechanisms, governance frameworks, identity systems
  • Collaborated with DAOs, foundations, and protocol teams on system design and implementation

Standards & Open Source

  • ERC-8185 & ERC-8186 — Ethereum Standards Track drafts for an off-chain entity registry and deterministic identity accounts (Draft, 2026)
  • sipstream — Open-source SIP voice gateway for AI. Bridges traditional telephony (G.711/RTP) to any WebSocket/AI backend (OpenAI example included) with zero transcoding. Powers the voice layer of Svarar Alltid.
  • EasyRPGF — Open-source retroactive public goods funding platform, used by Celo and Filecoin to distribute about $3.5M across ~290 grants

Background

Self-taught engineer with 12+ years of professional software development. Active contributor to Ethereum standards process and open-source ecosystem. Interests in AI governance, decentralized identity, digital sovereignty, and sense-making infrastructure.