I build backends,
e‑commerce platforms,
and Web3 infrastructure.
Independent engineer with 10+ years delivering production systems. Specializing in TypeScript/Go backends, PIM & e-commerce architecture, AWS serverless, and EVM smart contracts. Operating as Braunmann Ltd from Manchester, UK.
What I deliver
Web3 & Blockchain Engineering
Solidity smart contracts, cross-chain solvers, on-chain payment integrations. Production experience with ERC-20 token flows on Ethereum and Polygon (Golem Factory). Built a full cross-chain intent relay — escrow contracts, Go solver with dual-chain event listeners, React dApp with wallet integration.
What I can build for you
- → Smart contracts with full test suites (Foundry)
- → Chain event listeners & execution bots (Go)
- → dApp frontends (React + wagmi + viem)
- → On-chain payment integration (ERC-20)
- → TypeScript SDKs for your protocol
E-commerce & PIM Systems
7+ years building e-commerce platforms and Product Information Management systems. Supplier integrations (~100 APIs), inventory & stock management, Order Management, product catalogs (~30k SKUs). EventSourced PIM on AWS Serverless.
Backend Architecture & APIs
Microservices decomposition, event-driven systems, real-time WebSocket infrastructure (5k+ concurrent). REST & gRPC API design with OpenAPI. Monolith-to-services migration. SDK design and developer tooling.
AWS & Cloud Infrastructure
Serverless-first architectures on AWS. Lambda, API Gateway, SQS/SNS for async processing, DynamoDB, S3. Docker, Kubernetes, GitHub Actions CI/CD. Production systems processing millions of events daily.
AI & LLM Integration
LLM-powered document understanding pipelines — grouping, classification, OCR extraction with image assessment. Anthropic & OpenAI API integration. Commercially deployed classification systems with MCP layer.
Track record
Cross-Chain Intent Relay source →
Full intent-based token swap across Sepolia & OP Sepolia. Solidity escrow contracts (29 Foundry tests), Go solver with dual-chain WebSocket listeners, React dApp with wallet integration.
Golem Factory — TypeScript SDK for Decentralized Compute
Official SDK for on-chain ERC-20 payments (Ethereum + Polygon). Full API rebuild reverse-engineered from Rust daemon source. Release pipeline, NPM publishing, CI/CD.
E-commerce Platform Rebuilds × 3
Multiple monolith → microservices migrations. Event-driven bidding engine (5k+ concurrent users). EventSourced PIM. ~100 supplier API integrations, ~30k SKU catalogs.
LLM Document Understanding Pipeline
Production classification system — document grouping, OCR, image assessment. Anthropic API for reasoning. OpenAPI + MCP layer.
IoT Billing Backend — GenTrack
Smart-meter billing microservices. AWS Lambda + SQS processing millions of readings daily. High SLA.
Full work history available on the CV page.
How I work
Engagement
Contract via Braunmann Ltd (UK). Typically 3–12 month engagements. Full-time or part-time.
Location
Remote-first, UK/EU timezone. Manchester, UK. UK Settled Status.
Approach
Backend-first, full-stack when needed. Clean architecture, TDD, CI/CD. I ship production code.
Let's talk about your project.
Web3, backend infrastructure, or e-commerce — I'm ready to ship.