Peter Sjolin

Peter Sjolin

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Software developer
California, United States
Contact Peter regarding: 
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Full-time jobs
Starting at USD40K/month
Flexible work
Starting at USD100/hour

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Résumé

Jobs verified_user 0% verified
  • P
    F
    Senior Backend Engineer
    Pigfox LLC, Fuzzwuzz.xyz
    Apr 2022 - Apr 2025 (3 years 1 month)
    Go Ethereum Developer / Blockchain Architect (Golang)Built arbitrage trading bot using Go, goroutines, multi-wallet management, ERC-20 swaps,on-chain data pipelines, and real-time Subgraph indexing. Tested with 37,425,000 tokencomparisons per request cycle. (Golang)Designed Cosmos-SDK extension to integrate Al models into smart contract error detectionand resolution.Managed Solidity contract lifecycle via Dockerized ABI generation, Forge deployments,contract verification pipelines.Developed nft-prayers.org: API-driven NFT minting factory using Polygon, Go routines, emailnotifications, payment gateways. (Golang)Built Supabase-backed automotive parts trading platform in Python.
  • n
    Go developer
    nomihealth.com
    Jan 2021 - Apr 2022 (1 year 4 months)
    (Golang)Worked on backend with Go serverless framework on AWS. Implementing rules foradjudication of invoices and wrote unit and integration tests. (including AWS Lambda,DynamoDB, API Gateway, S3)
  • a
    Go developer
    aspiration.com
    Nov 2020 - Feb 2021 (4 months)
    (Golang)Built caching system in Go on CircleCI (Golang)
  • d
    Senior Software Developer
    dyl.com
    Jan 2020 - Nov 2020 (11 months)
    (Golang)Built ETL pipeline, gRPC API endpoints using GoSwagger 2.0 (aka OpenAPI 2.0), Postgres,Docker, Kubernetes, Kibana, Cassandra, GitLab for CI/CD. Wrote shell script for automatedDocker build and deployment to Kubernetes + unit tests dyl.com running on GCP. Mentoring1 Jr developer. (Golang)
  • Confidential client
    Senior Software Developer
    Confidential client
    Oct 2019 - Oct 2020 (1 year 1 month)
    Pigfox LLCConsulting project with startup firm in LA maintaining MySQL, building ETL pipeline and dataanalysis tools in Go using Sql & NoSQL.(Golang)
  • m
    Senior Go Software Developer and Architect
    metals.com
    Mar 2019 - Aug 2019 (6 months)
    (Golang)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 membersfrom Salesforce API and contacts CSV import concurrently. This application used goroutinestargeting the Twillio API to send SMS messages concurrently. Gorutines were also used to dobackground database statistics. Json was used for data transfer between back end and frontend which was built in Vue.js. used RabbitMQ for use with sending messages. Built CSVcontacts import into AWS AuroraDB, 732432 rows in 60 secs. Also evaluated/leveraged Kafkafor asynchronous messaging.Used Amazon State Language (ASL) for AWS Lambda step functions in workflow.Converted in-
  • f
    MultiAPIController
    flitways.com
    May 2016 - May 2018 (2 years 1 month)
    It is built for easy addition ofmore provider APIs. Used Geospatial calculations (lat/lon) for car/customer locations in orderto book rides from Lyft, Uber APIs and multiple other transportation providers. Also creatednumerous internal RESTful APIs. Used OAuth2 for authentication. Create SaaS solutions for avariety of transportation providers.
  • S
    Senior PHP Software Developer
    Securebuycommerce
    Mar 2014 - Oct 2014 (8 months)
    (Telecommuting) *Setup and deployed Magento Ecommerce website with custom DATA.Performed the UX/UI design and coded the sites, filled with products.Setup all aspects, front page, checkout pages and more.Built a complex/custom plugin with the commerce checkout process.When a user hits submit, the plugin collected data, then encrypted personal data,transmitted it to Securebycommerce fraud API, if response came back negative, thetransaction would be terminated.
  • P
    Senior Software Developer and Architect
    Pigfox LLC
    Jan 2014 - Mar 2019 (5 years 3 months)
    * Built API using Golang and Redis for Wadswap LLC.* Built API using Golang for fikzt.com.* Implemented SEO strategy on Tradesy.com with Phalcon Php, wrote unit &integration tests. MySQL/Redis. On Docker/Kubernetes with Jenkins for CI.* Used Java Play framework to build registration site.* Created RESTful API for Evox Images using Node.js, Knex.js. Wrote Chai tests. (Node.js +TypeScript)* Built a location based service platform for fikzt.com in Node.js. (Node.js + TypeScript)* Created RESTful API in Golang & PhoneGapped mobile app for wadswap.com.* Built nospy.email (deprecated) website using Laravel for encrypting all emails with personalkeys and end-to-end encryption.
  • P
    Senior PHP/Python Software Developer
    Pigfox LLC
    Feb 2008 - Mar 2014 (6 years 2 months)
    * For HOA -> ACH payments, optimized MySql table for bank XML file, decreasing processingtime from ~8 hrs to ~17mins by elimination intermediate steps. Backend in Laravel.* Implemented infinite scroll for JSI* Built Android app for Spotkast where a user could log in to an API and getcredentials, then take a picture with the camera for upload to API. Similar to Facebook.* Developed API for clip upload by iPhone to (dead url)http://tripclips.inhance-dev.com/gallery* Implemented Google two factor authentication on BTCFunds, a Bitcoin exchange. (Golang)* 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. (Golang)* Buil
  • e
    PHP Software Developer
    eSpeed a division of Cantor & Fitzgerald
    Sep 2007 - Feb 2008 (6 months)
    * Modified, added functionality on ppx.popsci.com, a virtual stock exchange.* Reengineered ppx.popsci.com from a procedural application to a strict PHP5 OO solution.* Created RSS and XML for widgets on ppx.popsci.com.* Wrote SQL reports for catching cheaters on ppx.popsci.com.
  • T
    PHP Software Developer
    TekSystems freelance
    Jun 2007 - Aug 2007 (3 months)
    @ AEG, LA, Ca .* Built OO PHP 5 CMS for http://www.aeglive.com designing and extending base classesfor data manipulation in mySQL.
  • P
    PHP Software Developer
    PigFox LLC (own business)
    Jun 2005 - Jun 2007 (2 years 1 month)
    Clients:Yeahthatcommercial.com, Los Angeles, Ca. (c2c) (Telecommuting)iMedia, Santa Monica, Ca. (c2c) (Telecommuting)DigiLink, Marina Del Rey, Ca. (c2c) (Telecommuting)jobsearchintelligence.com, Ca. (c2c) (Telecommuting)Senior Web developer, problem solver, DB designer PHP 4 & 5, mySQL.* Built a member driven site where users can upload pictures, video, and resume typeinformation. Video runs like Youtube.com or Myspace.com* Built a web front end to manage secured login multi level user settings & management forAsterisk open source telephone system. (site on restricted domain)* Implemented Oscommerce.com on Lloydsofhollywood.com.* Built a click tracking and reporting system.* Utilized Web Services (XML) to connect to Amazon.com store.* Imple
  • J
    PHP Software Developer
    Juicewireless.com
    Mar 2005 - Apr 2005 (2 months)
    , NewYork, New York. (1099) (Telecommuting)* Senior developer, built heavily data driven wireless Web application.* DB designer, designed extensions of DB.* Wrote pages enabling authenticated user to edit data.* Wrote dynamic forms and catching scripts.* Utilizing CURL, XHTML, PHP 4.3.1, mySQL, JavaScript, CSS.
  • E
    PHP Software Developer
    Eeminder.com
    Nov 2004 - Mar 2005 (5 months)
    (Telecommuting)* Built heavily data driven business Web application.* Co designer of DB, designed additions of DB, 15 tables in DB.* Wrote complex multiple queries using authenticated user login.* Wrote sorted queries displayed on multiple pages.* Utilizing XHTML, OO PHP, mySQL, JavaScript, CSS.
  • F
    CTO
    FunkyVenice.com
    Dec 2003 - Nov 2004 (1 year)
    , Los Angeles, California.* Chief architect and designer, implemented entire site.* Implemented off the shelf shopping cart.* Utilized PHP, XHTML, frames, iframes, CSS.
  • Naxcom.com
    Java Developer
    Naxcom.com
    Sep 2003 - Dec 2003 (4 months)
    , Los Angeles, California.* Wrote queries for Oracle to display inventories of online shop.* Edited Struts for navigation.* Utilized Java, JSP, XML, and Struts, Oracle 9i, for enhancements on Web site.* Built & evolved RESTful API via versioning.
  • P
    Go Ethereum Developer
    Pigfox LLC
    The current project involves a Go-Ethereum arbitrage trading bot utilizing multiple Golangroutines and wallets to swap a multitude of ERC-20 tokens, using Subgraph for DEX dataETL, comparison, and trading. It performs runtime gas calculations and adjustments.ABI/bin/APIs are generated by a shell script that calls Docker commands to compile Soliditycontracts. Forge is used for compiling, deploying, and verifying contracts. Tested with37,425,000 token comparisons per request cycle.
  • f
    Project lead developer
    freedompop.com
    (8 person team), created custom widgets onOracle RightNow platform for coordinated with VP of product and customer service director.Demonstrated clear communication and collaborative leadership.Developed Website & API and proxy for Ajax driven salary calculator turnkey solution inaddition to multiple HR & educational data solutions for JSI, a SaaS company.Worked on Angular 1 admin module and Node.js API. (Node.js + TypeScript)Build CRUD API using OPP Python.Built custom CMSs.
Education verified_user 0% verified
  • University of California, Los Angeles (UCLA)
    Bachelor of Science General Mathematics with specialization in Computing
    University of California, Los Angeles (UCLA)
    Aug 1996 - Dec 1999 (3 years 5 months)
  • U
    BS General Mathematics
    University of California at Los Angeles
    Jan 1996 - Jan 1999 (3 years 1 month)
    with specialization in computing.
  • S
    Sun Certified Programmer for the Java 2 Platform 1.4.
Projects (professional or personal) verified_user 0% verified
  • W
    Web3 Game
    Jun 2025
    Solidity + Forge/Cast + Go) (Golang)Wrote a Solidity NFT AlphaCard smart contract and deployed to Base main net with Forge.Build dAPP using Go for backend, modular vanilla Javascript, html and css for front end.Enabled Metamask compatible integration for authentication and NFT minting. (Golang)
  • Z
    ZK-SNARK / RISC Zero MVP Integration
    Apr 2025 - May 2025 (2 months)
    Solidity + Forge + Rust)(Latitude Exchange project)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 contractinteractions, targeting riscv32im-risc0-zkvm-elf architecture.Explored cross-language proof delivery workflows bridging Rust and Solidity, includingmanual proof serialization and contract verification interfaces.Designed initial Solidity verification contracts for on-chain validation of off-chain generatedzk-proofs.Prototyped Forge-based tests simulating end-to-end flows: proof generation, proof delivery,and contract verification.Navigated RISC Zero SDK toolchain internals (ca
  • n
    nft-prayers.org
    was a product by Pigfox LLC, featuring a text-based NFT minting site thatutilized an API-centric approach for payments, ERC-721 token minting, and emailnotifications. The minting factory employed a 9-step background process using Go routinesand the Polygon API.
  • O
    OO python3 car parts trading application
    with Supabase DB. Utilized MDM for tocreate an authoritative version of fragmented car parts data.