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I'm a US & EU citizen with 20+ years of experience in software architecture, backend systems, and cloud-native development. I excel at leading teams, mentoring junior engineers, and delivering scalable, API-driven solutions across Go, Node.js, TypeScript, and AWS. Most recent work includes a Go-based arbitrage trading bot, an NFT minting factory, and zk-SNARK proof integration. I value clear communication, collaborative problem solving, and building robust systems that empower product teams.…I'm a US & EU citizen with 20+ years of experience in software architecture, backend systems, and cloud-native development. I excel at leading teams, mentoring junior engineers, and delivering scalable, API-driven solutions across Go, Node.js, TypeScript, and AWS. Most recent work includes a Go-based arbitrage trading bot, an NFT minting factory, and zk-SNARK proof integration. I value clear communication, collaborative problem solving, and building robust systems that empower product teams.

Peter Sjolin

Full Stack Developer, Back-End Developer, Web Developer, +2

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I'm a US & EU citizen with 20+ years of experience in software architecture, backend systems, and cloud-native development. I excel at leading teams, mentoring junior engineers, and delivering scalable, API-driven solutions across Go, Node.js, TypeScript, and AWS. Most recent work includes a Go-based arbitrage trading bot, an NFT minting factory, and zk-SNARK proof integration. I value clear communication, collaborative problem solving, and building robust systems that empower product teams.…I'm a US & EU citizen with 20+ years of experience in software architecture, backend systems, and cloud-native development. I excel at leading teams, mentoring junior engineers, and delivering scalable, API-driven solutions across Go, Node.js, TypeScript, and AWS. Most recent work includes a Go-based arbitrage trading bot, an NFT minting factory, and zk-SNARK proof integration. I value clear communication, collaborative problem solving, and building robust systems that empower product teams.

Available to hire

I’m a US & EU citizen with 20+ years of experience in software architecture, backend systems, and cloud-native development. I excel at leading teams, mentoring junior engineers, and delivering scalable, API-driven solutions across Go, Node.js, TypeScript, and AWS.
Most recent work includes a Go-based arbitrage trading bot, an NFT minting factory, and zk-SNARK proof integration. I value clear communication, collaborative problem solving, and building robust systems that empower product teams.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Fluent

Aragonese

Fluent

Javanese

Intermediate

Work Experience

Web3 Game Developer / Blockchain Engineer at Fuzzwuzz.xyz

June 1, 2025 - Present

Wrote a Solidity NFT AlphaCard smart contract and deployed to Base main net with Forge. Built a Go backend and modular vanilla JavaScript/HTML/CSS frontend. Enabled Metamask authentication and NFT minting.

Backend Engineer / Blockchain Integration at Catalyte.io (Latitude Exchange project) [Contract]

May 1, 2025 - October 15, 2025

Built a proof-of-concept integration connecting Solidity smart contracts (Forge) with zk-SNARK proof generation using the RISC Zero SDK. Implemented Rust-based zkVM guest methods to generate zk-proofs for smart contract interactions; designed initial Solidity verification contracts; prototyped Forge-based end-to-end tests; resolved SDK build pipeline issues.

Senior Backend Engineer (Go / SaaS) at Pigfox LLC

April 1, 2025 - October 15, 2025

Built an arbitrage trading bot using Go, goroutines, multi-wallet management, ERC-20 swaps, on-chain data pipelines, and real-time Subgraph indexing. Implemented Cosmos-SDK extension to integrate AI models into smart contract error detection and resolution. Managed Solidity contract lifecycle via Dockerized ABI generation, Forge deployments, and verification pipelines. Developed nft-prayers.org: an API-driven NFT minting factory on Polygon with email notifications and payment gateways.

Go Developer at Nomi Health

April 1, 2022 - October 15, 2025

Backend development with Go serverless framework on AWS. Implemented rules for adjudication of invoices and wrote unit and integration tests (including AWS Lambda, DynamoDB, API Gateway, S3).

Go Developer at Aspiration

February 1, 2021 - October 15, 2025

Built caching system in Go on CircleCI, improving performance and reliability of data access.

Senior Software Developer at dyl.com

November 1, 2020 - October 15, 2025

Built ETL pipeline, gRPC API endpoints using GoSwagger 2.0, Postgres, Docker, Kubernetes; Kibana, Cassandra; GitLab for CI/CD. Wrote shell script for automated Docker builds and Kubernetes deployment; mentored 1 junior developer.

Senior Software Developer at Confidential client / Pigfox LLC (Consulting)

October 1, 2020 - October 15, 2025

Maintained MySQL, built ETL data analysis tools in Go using SQL & NoSQL.

Senior Go Software Developer and Architect at metals.com

August 1, 2019 - October 15, 2025

Reverse engineered call loop to build SPA with RESTful API for registration, login, groups/broadcasts, JWT authentication; import campaign members from Salesforce and CSV; implemented SMS via Twilio; explored messaging queues; data transformation and API evolution.

Senior Software Developer and Architect at PigFox LLC

March 1, 2019 - October 15, 2025

Built API using Golang and Redis; developed API for fikzt.com; implemented SEO strategies for Tradesy; created location-based service features and multi-provider APIs; designed SaaS platforms and microservices; led team as project lead with an 8-person team; mentored juniors.

CTO at FunkyVenice.com

November 1, 2004 - October 15, 2025

Chief architect and designer; implemented an e-commerce site and related backend components; stack included PHP, XHTML/CSS, and CMS integration.

PHP Software Developer at TekSystems (contract @ AEG)

August 1, 2007 - October 15, 2025

Built OO PHP 5 CMS for aeglive.com; extended base classes for data manipulation in MySQL.

Senior PHP/Python Software Developer at PigFox LLC (own business)

June 1, 2007 - October 15, 2025

Built member-driven sites with media uploads; API-driven integrations; implemented security features and CMS tooling; developed various SaaS and data-driven solutions.

Senior Backend Engineer (Go / SaaS) at Pigfox LLC

April 1, 2025 - October 15, 2025

Built arbitrage trading bot using Go, goroutines, multi-wallet management, ERC-20 swaps, on-chain data pipelines, and real-time Subgraph indexing. Led development of NFT minting tooling and Go-based API backend; designed scalable architectures and deployment pipelines.

Go Ethereum Developer / Blockchain Architect at Pigfox LLC

April 1, 2025 - October 15, 2025

Designed Cosmos-SDK extension to integrate AI models into smart contract error detection and resolution. Managed Solidity lifecycle with Dockerized ABI generation, Forge deployments, verification pipelines; prototyped end-to-end flows with Forge/tests and on-chain verification.

Go Developer at Nomi Health

April 1, 2022 - October 15, 2025

Backend Go serverless framework on AWS; implemented rules for adjudication of invoices; wrote unit and integration tests; worked with AWS Lambda, DynamoDB, API Gateway, and S3.

Go Developer at Aspiration

November 1, 2020 - October 15, 2025

Built caching system in Go on CircleCI; implemented performance-focused enhancements and backend optimizations.

Senior Software Developer at dyl.com

November 1, 2020 - October 15, 2025

ETL pipeline, gRPC API endpoints using GoSwagger 2.0; Postgres, Docker, Kubernetes, Kibana, Cassandra; CI/CD with GitLab; shell script automation for Docker builds; mentoring one junior developer.

Senior Software Developer at Pigfox LLC (Confidential client)

October 1, 2020 - October 15, 2025

Consulting project maintaining MySQL, building ETL and data analysis tools in Go; background processing and data pipelines.

Senior Go Software Developer and Architect at metals.com

August 1, 2019 - October 15, 2025

Reverse engineered call loop; built SPA with RESTful API for registration, login, campaigns; orchestrated SMS via Twilio; evaluated messaging infrastructure and data migrations; implemented On AWS with ASL.

Senior Software Developer and Architect at PigFox LLC

March 1, 2019 - October 15, 2025

Built API using Golang and Redis; created API for fikzt.com; SEO strategy for Tradesy; Node.js/TypeScript services; multi-provider API controller; Go-based API for wadswap; email-based encryption payload; led migration to microservices.

PHP Software Developer at eSpeed (division of Cantor & Fitzgerald)

February 1, 2008 - October 15, 2025

Modified and extended virtual stock exchange app; created RSS/XML; SQL reports for fraud detection; refactored to OO PHP.

Senior PHP/Python Software Developer at PigFox LLC

February 1, 2014 - October 15, 2025

Backend development across PHP/Python stacks; optimized MySQL; implemented login, OTP, and data services; built CRM/ERP-like modules; performed data migrations and performance optimizations.