← directions
rastko@ceres: ~/portfolio — zsh
● available
rastko@blockchain:~$ whoami
RASTKO MISULIC_
Blockchain & Backend Developer
Smart Contracts Protocol Design Backend Infra ZK Cross-chain
rastko@blockchain:~$ cat about.txt

"Backend & blockchain engineer with deep experience across smart-contract systems, backend services and infrastructure. I focus on decentralized technologies and protocol design — and on never running out of new low-level rabbit holes to learn."

rastko@blockchain:~$ cat ~/.contact
email
rastko23@hotmail.com
linkedin
/in/rmisulic
github
@RastkoDev@rale11420
languages
Serbian (native) · English (fluent)
rastko@blockchain:~$ ls --skills --sort=level
Solidity95
TypeScript93
NestJS / Node92
Rust85
Solana / Anchor82
Circom / Noir78
Move (Aptos/Sui)72
AWS / DevOps80
SQL / NoSQL88
Hyperlane / Pact70
rastko@blockchain:~$ git log --experience --stat

4 Point O Labs / Ceres Blockchain Solutions

Mar 2024 — Present
Backend / Blockchain Engineer
Kadena ⇄ Ethereum Bridge ↗ contracts↗ sdk
rust · typescript · hyperlane · pact · solidity · aws
  • Built & maintained a cross-chain bridge using Hyperlane, with smart contracts in Pact & Solidity.
  • Shipped an SDK for bridge integration, plus developer docs and an ops admin dashboard.
  • Collaborated with the Kadena core team on design, integration and multi-chain expansion.
Arkaine (Pulse AI) — Trading Analytics Platform ↗ live
nestjs · typescript · solidity · solana
  • Backend for token data, trader profiles, PnL calculations and charts.
  • Aggregation services for trader/token metrics + staking contracts on EVM and Solana.
Predikt — Prediction-Market Aggregator ↗ live
nestjs · typescript · ai (openrouter)
  • Services pulling and matching markets across 3 major prediction-market platforms.
  • Semantic-analysis + AI matching strategies with automated result validation.
Bull — Token Launch Platform on Polkadot
nestjs · typescript · rust
  • Designed the backend for ERC-20–style token creation, configuration and launch workflows.

MVP Workshop

Oct 2022 — Aug 2023
Backend / Blockchain Engineer
Global United (GU) — On-chain Social Network
solidity · lens protocol · nestjs · mythril · slither · echidna
  • Smart-contract lead for an on-chain social network on a customized Lens-based protocol.
  • Designed core contracts & modules with unit, fuzz and e2e testing strategies.
  • Built backend services to index and process on-chain events.
rastko@blockchain:~$ ls projects/ --personal
Dazhbog — Decentralized Perpetual Futures ★ hackathon winner
ink! · rust
  • Conceived & co-developed a perps protocol for Polkadot parachains; led core protocol architecture.
ZK Factoring — Privacy-Preserving Invoice Verification ↗ live
noir · react
  • Sellers publish invoices; buyers verify properties without revealing contents.
Tax Withdrawal Assistant — AI Accounting Tool ↗ live
nestjs · openai · pinecone · react
  • AI-assisted platform to identify taxable items and determine correct tax treatment.
Tornado-Cash–Style Mixer ↗ live
solidity · circom · react
  • Privacy mixer with ZK circuits, smart contracts and a frontend interface.
rastko@blockchain:~$ cat talks.log
rastko@blockchain:~$ cat education.txt
rastko@blockchain:~$
// built with HTML — last commit June 2026