Chris Cuber
Full Stack Web3 Engineer — Backend-First
Manchester, UK · Remote · UK Settled Status
Senior engineer with 10+ years building distributed, event-driven systems — now focused on Web3. Hands-on blockchain experience via Golem Factory (ERC-20 on-chain payments, decentralized compute) and a cross-chain intent solver portfolio project (Solidity, Go, React). Strong background in real-time event systems, WebSocket infrastructure, and multi-service backends directly transferable to chain event listening, execution layers, and protocol engineering.
Core Skills
Blockchain / Web3
Backend
Cloud & DevOps
Data
Frontend
AI / LLM
Portfolio
EVM Cross-Chain Intent Relay
Intent-based cross-chain token swap without a traditional bridge
User locks tokens in escrow on Sepolia; Go solver detects the on-chain event, delivers tokens on OP Sepolia using its own liquidity, then claims the escrow.
Solidity
IntentHub escrow, CEI pattern, SafeERC20, 29 Foundry tests
Go Solver
Dual-chain WebSocket listener, ABI decoding, tx signing, REST API
React dApp
wagmi v3 + viem, wallet integration, live intent status polling
Experience
Braunmann Ltd
Independent Software Engineer 02.2024 – PresentBackend-first contracting across integrations, internal platforms, and automation.
ERLI S.A. · TypeScript Engineer · 08.2025 – 02.2026
Backend integration services for supplier/partner data sync. REST APIs, Kubernetes environment, React admin tooling.
Wonder Tech · Integrations & AI Pipelines · 02.2024 – 07.2025
Replatformed PHP monolith → modular multitenant Node.js on AWS. Rebuilt event-driven bidding engine for 5k+ concurrent users. Built LLM-powered document understanding pipeline with Anthropic. Delivered Clearance Campaign Platform with SAP ERP sync.
GenTrack Ltd
Backend TypeScript Engineer 09.2023 – 01.2024Backend microservices for smart-meter billing. AWS Lambda + SQS for async processing of millions of IoT readings daily. High SLA environment.
Golem Factory
Senior Software Engineer 09.2022 – 09.2023Maintained @golem-sdk/golem-js — official TypeScript SDK for decentralized compute with on-chain ERC-20 payments (Ethereum + Polygon). Led full SDK API rebuild by reverse-engineering yagna daemon's Rust source. Owned release pipeline: Rollup, NPM, semantic-release, GitHub Actions. Built React playground for live event flow visualization.
Auction Marketer
Senior Software Engineer 09.2020 – 09.2022Replatformed PHP monolith → multitenant Node.js on AWS. Event-driven bidding engine (5k+ concurrent, WebSocket). EventSourced PIM on Serverless + OpenSearch. DDD, inter-service communication via REST/gRPC/SNS.
SfMeble.pl
Senior Software Engineer (Contractor) 01.2018 – 09.2020Led modernization — decomposed monolith into domain services (PIM, Stock/ETA, OMS). Rebuilt inventory and order management with bounded contexts.
Venditan
Senior Software Engineer 02.2017 – 12.2017React + Electron EPOS desktop app. Offline-first caching, Verifone payment terminal integration.
SfMeble.pl
Software Engineer → Senior 06.2010 – 01.2017Proprietary e-commerce platform for furniture. ~100 supplier integrations, ~30k products, ~5k concurrent users. PHP → Node.js → TypeScript.
Education & Certifications
Jagiellonian University — Computer Science, 2006–2008
School of Management and Banking, Kraków — Computer Science, 2008–2010
Polish (native) · English (professional)