Java Certified Programmer

Arc Certified Remote Developer

Solidity Mastery Bootcamp - Cohort 6

President

(Subject to renewal, I declined to renew contract)
Worked on integration tests using Go and a CLI that will enable developers to have a much faster local development environment.

Golang Software Engineer 

President/Owner

* Built email site using public/key encryption.
* Developed API and proxy for Ajax driven JSI salary calculator turnkey solution.
* Optimized MySql table for bank file, decreasing processing time from ~8 hrs to ~17mins.
* Implemented infinite scroll for JSI
* Developed API for clip upload by iPhone to http://tripclips.inhance-dev.com/gallery
* Implemented Google two factor authentication on BTCFunds, a Bitcoin exchange.
* Wrote models and implemented Memcache for Scriball.
* Built bank system, admin module, using credits for real $ for JSI, a SaaS company.
* Implemented “Google like search” for JSI.
* Built custom DB query caching system for JSI, resulted in ~33% speed increase.
* Built store.pigfox.com and m.pigfox.com as mobile web app vs web site, aka dynamic skin.
* Used C# Razor view engine for ATT Facebook project.
* Built Drupal 7 modules for Amazon EC2, querying MongoDB with JSON via jQuery AJAX.
* Installed & configured LAMP on Amazon EC2 server via Putty.
* Used Knockout.js f

Senior Software Engineer API developer

Consulting project with startup firm in LA maintaining MySQL and building data analysis tools in Go.

Senior Software Engineer

Sr. Go Developer

Current project involves a Go-Ethereum arbitrage trading bot using multiple go routines and wallets for swapping a multitude of tokens using subgraph for DEX data collection. Abi/bin/apis are generated by a shell script calling Docker commands compiling Solidity contracts.

https://nft-prayers.org is a product by Pigfox LLC which is a text based NFT minting site using an API centric approach for payment, minting, email. The minting factory is a 9 step process background go routine on Tatum API. A user enters text, which is auto detected for language so that the proper font and text alignment can be set. 
Then a credit card payment screen appears where the user can elect to send the NFT as a gift. Upon successful payment an image is created, the dimensions are a function of the text length.
The image is uploaded to IPFS and then that hash is placed in a meta data payload to IPFS.  Once this is done a Celo wallet is created, the metadata hash is placed on the Celo blockchain and ownershi

Go-Ethereum & Solidity Software Engineer 

• 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, targeting riscv32im-risc0-zkvm-elf architecture.
    • Explored cross-language proof delivery workflows bridging Rust and Solidity, including manual proof serialization and contract verification interfaces.
    • Designed initial Solidity verification contracts for on-chain validation of off-chain generated zk-proofs.
    • Prototyped Forge-based tests simulating end-to-end flows: proof generation, proof delivery, and contract verification.

Solidity contracts developer

Reverse engineered Call loop, to build SPA with RESTful API back end in Golang for registration, login, groups / broadcasts CRUD with authentication using JWT, import campaign members from Salesforce API and contacts CSV import concurrently. This application used goroutines targeting the Twillio API to send SMS messages concurrently. Gorutines were also used to do background database statistics. Json was used for data transfer between back end and front end which was built in Vue.js.
Built CSV contacts import into AWS  AuroraDB, 732432 rows in 60 secs.
Used Amazon State Language (ASL) for AWS Lambda step functions in workflow.
Converted in-house data to/from Odata v 4,0 using Golang in json & xml.

Senior Software Developer at metals.com
Reverse engineered Call loop, to build SPA with RESTful API back end in Golang for registration, login, groups / broadcasts CRUD with authentication using JWT, import campaign members from Salesforce API and contacts CSV import concurrently. This application used goroutines targeting the Twillio API to send SMS messages concurrently. Gorutines were also used to do background database statistics. Json was used for data transfer between back end and front end which was built in Vue.js.
Built CSV contacts import into AWS  AuroraDB, 732432 rows in 60 secs.
Used Amazon State Language (ASL) for AWS Lambda step functions in workflow.
Converted in-house data to/from Odata v 4,0 using Golang in json & xml.

Senior Golang Software Engineer

Building APIS with Golang, Swagger, Docker, Kubernetes

PHP Developer

Wrote Solidity contract for minting of NFTs. Created deployment pipeline of website deployments. Integrated Rabby/Metamask wallet integration to authenticate users for minting.

NFT backend developer

20+ years backend, 7+ in Go. Now shipping AI + blockchain systems. Pigfox LLC. Hire me.

productHunt

devto

github

Know about Peter Sjolin's work experience, education, and much more. Peter Sjolin