Resume

Sam Parhimchik

Hands on engineering manager with a senior product engineering background in fintech, blockchain infrastructure, developer tooling, and AI enabled delivery.

I lead small cross functional teams from product discovery through implementation and measurement while remaining technically involved in architecture, critical code, analytics, and developer infrastructure.

Engineering Manager @ Orca · Aug 2024–Jul 2026

US citizen · Remote preferred · Open to relocation within the United States

Currently based in Los Angeles

Review leadership experienceView selected case studiesDownload résumé
Portrait of Sam Parhimchik

Experience

Leadership with technical depth

Hands on Engineering Manager who owns discovery through delivery — from zero to one founder work to Solana product leadership, analytics, and public developer tooling.

Orca · Engineering Manager

Senior Software EngineerEngineering Manager

Managed three engineers · led cross functional product team with one designer · Los Angeles | New York | Miami

Aug 2024 — Jul 2026

Solana's premier liquidity layer. Hands on Engineering Manager leading a small product team across discovery, delivery, analytics, partner integrations, and public developer tooling.

  • Senior Software Engineer → Engineering Manager while leading a team of three engineers and one product designer
  • Owned discovery, prioritization, planning, delivery, and post release evaluation for liquidity and trading products
  • Shipped public Solana SDKs (@orca-so/tx-sender, orca_tx_sender) integrated into the Whirlpools ecosystem
  • Built Mixpanel instrumentation and funnels; used behavioral analysis to improve concentrated liquidity deposit retention

People management

  • Hiring and interviewing for engineering roles
  • Regular one on ones and performance feedback with direct reports
  • Career development planning and coaching for engineers on the team
  • Project staffing and cycle planning across engineering and design
  • Delivery risk management during partner integrations and product launches
  • Team process improvements including LLM assisted TDD and PR review workflows
  • Collaboration with leadership on priorities, resourcing, and partner opportunities
Team and product ownership

Managed three engineers and led a cross functional product team with one designer. Owned discovery, prioritization, planning, delivery, and post release evaluation.

Led Wavebreak — Orca's meme token trading platform — from market research and user interviews through shipping, including infrastructure for vanity key generation.

Technical contribution

Designed and shipped public TypeScript and Rust transaction SDKs. Remained involved in architecture, implementation, integration, and partner delivery.

  • Authored @orca-so/tx-sender (TypeScript) with priority fees, Jito tips, compute unit estimation, and retry logic
  • Contributed companion Rust crate orca_tx_sender in the same public monorepo
  • Integrated transaction tooling within the orca-so/whirlpools SDK ecosystem
Analytics and outcomes

Built Mixpanel instrumentation, funnels, and dashboards. Used behavioral analysis to identify abandonment and retention opportunities in liquidity workflows.

OpenHaus · Technical Founder · Part time

Jan 2022 — 2024 · Vancouver, BC

Commission-free real estate platform I co-founded — zero realtor commissions, owner-empowered listings, and end-to-end deal tooling from offer flow through closing. I owned the full stack as technical founder: product, backend, infrastructure, and go-to-market surfaces.

  • Technical founder owning product vision, full-stack development, infrastructure, and deployment
  • Facilitated over $25 million in active property listings on the platform
  • Built OfferFlow, live messaging, scheduling, KYC, and MLS listing distribution to Realtor.ca, Zillow, and REW
  • Integrated automated property valuation estimates through offerland.ca; CI/CD via GitHub Actions on AWS
  • Demonstrates zero-to-one ownership — the same outcome-driven approach I bring to engineering leadership
Technologies
ReactRecoilNode.jsPostgreSQLDockerAWSStripeMapbox

  1. Mar 2022 — Aug 2024

    Los Angeles, CA

    PsyFi

    Senior Full Stack Engineer

    Core product engineer for PsyFi and the PsyOptions protocol — built the primary surfaces for options trading, token launches, liquidity management, airdrops, staking, and mobile lending across the Solana DeFi stack.

    • Built and shipped core PsyOptions trading experiences — American-style options on Solana including minting, collateral management, and order flow UX
    • Designed and built Fusion — collateralized options airdrops using Merkle trees for claim verification at protocol scale
    • Led frontend development of Armada — LBP curve auctions for token launches and CLMM vaults built on Orca Whirlpools; CLMM vaults reached over $1M TVL without marketing
    • Built a white-label staking frontend used by large Solana teams including Bonk, with over $25M in staked assets
    • Led DeMUX — tokenomics revenue allocation tooling used by multiple Solana teams
    • Ported PsyLend borrow/lend flows to React Native days after Solana Mobile launch (Pyth / Switchboard oracles, DOV collateral)
    Technologies
    TypeScriptReactNext.jsReact NativeRustAnchorSolanaPsyOptionsOrca Whirlpools

  2. Aug 2020 — Mar 2022

    San Francisco, CA

    OnTraccr

    Full Stack Engineer

    First engineer on a SaaS platform for construction contractors — labor tracking, forecasting, data sharing, and automated workflows.

    • Built timecard management with dynamic OT and pay calculation
    • Designed and implemented end-to-end multi-stage timecard approval plus budget and payroll analysis — core product features
    • Developed core React Native mobile features including dynamic forms, guides, and document center
    Technologies
    ReactReduxReact NativeNode.jsHapiMySQLAWSSocket.io

  3. Oct 2020 — Jan 2021

    San Francisco, CA

    Atlas One

    Full Stack Engineer (Contract)

    Research portal for asset-backed digital securities with live pricing and a composite index.

    • Designed and developed the research portal for digital securities offerings
    • Built cron jobs that pull live price data from issuers and calculate an index from historical token price changes
    Technologies
    ReactReduxNode.jsExpressKeystonePostgreSQLGraphQLCircleCI

  4. May 2020 — Aug 2020

    San Francisco, CA

    WizeHire

    Software Engineer (Contract)

    Hiring platform work spanning customer support workflows and automated engineer onboarding infrastructure.

    • Built job-posting management components that sped up customer and support workflows
    • Automated VM development stack — reduced new-engineer environment setup from about a week to a few minutes
    Technologies
    ReactDjangoPHPJenkinsGCPBash

  5. May 2019 — May 2020

    Vancouver, BC

    Philips

    Software Developer

    Distributed smart senior-home system — IoT device integration, event handling, and facility monitoring dashboards.

    • Integrated third-party IoT devices and built apps to manage them and handle events
    • Built responsive dashboard components for monitoring device status across facilities
    • Mentored interns and new hires in a team of about ten while helping scale the product
    Technologies
    Node.jsAngularTypeScriptPythonKubernetesRabbitMQMySQLDynamoDBAWS S3

  6. Sep 2017 — Aug 2018

    Vancouver, BC

    Terramera

    Software Engineer

    AgTech engineering across data pipelines, internal analytics dashboards, plant imaging hardware software, and computer vision.

    • Built cron-activated inventory download jobs across major retailers into PostgreSQL, saving hours of weekly manual work for sales analysts
    • Developed statistical and administrative tools for an internal dashboard used by sales and chemistry research teams
    • Trained a stained-egg segmentation model with 96% accuracy
    Technologies
    Vue.jsD3.jsJavaPostgreSQLDockerPythonKerasOpenCVMQTT

  7. Jul 2016 — Aug 2016

    Minsk, Belarus

    IBA Group

    Java Developer (Summer Internship)

    Android app for a supermarket network that scans passports via OCR to fill rewards documents.

    • Built Android OCR flow using Google Vision and Tesseract for passport scanning
    Technologies
    JavaAndroidMaven

Selected projects

Case studies with ownership and outcomes

Ranked by user or business impact, technical complexity, ownership, and product thinking.

Orca TX Sender

Orca

Public TypeScript and Rust SDKs for building and sending Solana transactions with priority fees, Jito tips, compute estimation, and retries.

Problem
Application developers need reliable, ergonomic abstractions for modern Solana transaction submission without reinventing fee estimation, tips, and confirmation logic.
My contribution
Designed, implemented, and shipped the public packages; integrated transaction tooling into the Whirlpools SDK ecosystem.
Outcome
  • Published on npm and crates.io for public consumption
  • Merged into the broader Orca developer tooling surface via whirlpools contributions
TypeScriptRustSolana KitSolana

Improving liquidity deposit retention at Orca

Orca

Product leadership case study — discovery, analytics, and delivery to reduce abandonment in concentrated liquidity deposit workflows.

Problem
Users abandoned or failed to complete important concentrated liquidity workflows, limiting retention in a core liquidity product.
My contribution
Led discovery, analytics, prioritization, planning, implementation, and evaluation across engineering and design.
Outcome
  • Instrumented key liquidity journeys with Mixpanel dashboards and funnels
  • Used behavioral analysis to prioritize retention improvements in CLMM deposit flows
MixpanelTypeScriptReactSolana

openhaus.ca

OpenHaus

Commission-free real estate platform for direct buyer–seller transactions. Product has since been sunset.

Problem
High transaction costs from realtor commissions and limited seller control over the sales process.
My contribution
Technical founder — built core product surfaces including messaging, offer flows, scheduling, KYC, and cloud deployment.
Outcome
  • Facilitated over $25 million in active property listings
  • Reduced transaction costs by eliminating realtor commissions
  • Product has since been sunset
ReactRecoilNode.jsPostgreSQLDockerAWSStripeMapbox
openhaus.ca property listing interface

Armada and staking infrastructure

PsyFi

Solana token launch, liquidity management, and white label staking infrastructure — LBP auctions, CLMM vaults, and a staking frontend used by major teams.

Problem
Teams needed versatile ways to launch tokens, manage concentrated liquidity, and operate staking programs on Solana.
My contribution
Led frontend development for Armada and built a white label staking frontend used by large Solana teams including Bonk.
Outcome
  • CLMM vaults reached over $1M TVL without marketing efforts
  • Staking frontend supported over $25M in staked assets across partner deployments
TypeScriptReactRustSolanaOrca Whirlpools
Armada product interface screenshot

Automated Dev Environment VMs

WizeHire

One click GCP VM provisioning that cut engineer onboarding setup from about a week to minutes.

Problem
Multi language distributed systems made local setup fragile and time consuming for new hires.
My contribution
Built the Django API, frontend trigger, and bash provisioning for identical cloud instances.
Outcome
  • Onboarding setup reduced from ~1 week to a few minutes
  • Identical instances for dependency consistency with production
DjangoBashnginxGCP
Automated development environment setup interface
Earlier projects (11)

PsyOptions Trading Platform

PsyFi

Core product surfaces for American-style options on Solana — minting, collateral, trading flows, and protocol integrations.

Problem
PsyOptions needed usable, production-grade interfaces for a complex on-chain options protocol — from minting and collateral management to order flow and portfolio views.
My contribution
Built and shipped primary PsyOptions trading experiences and related protocol integrations across the PsyFi product suite.
Approach
  • Options minting and collateral management UX
  • Trading and order flow interfaces on Solana
  • Integration with PsyOptions American-style options protocol
  • Extended into Fusion airdrops, staking, and lending surfaces across the same stack
Outcome
  • Production options trading experiences used across the PsyFi ecosystem
  • Foundation for Fusion airdrops and downstream DeFi products built on PsyOptions
TypeScriptReactNext.jsRustAnchorSolanaPsyOptions

Wavebreak

Orca

Orca's meme token trading platform — product led development from market research and user interviews through shipping.

Problem
Meme token trading moves fast; the product needed to reflect real user behavior, market trends, and competitive dynamics without sacrificing engineering quality.
My contribution
Led product and engineering — market research, InsightsStream integration, user interviews, feature prioritization, and infrastructure including automated vanity key generation.
Approach
  • Product decisions grounded in market research, trend analysis, and direct user interview feedback
  • InsightsStream partnership for market intelligence
  • CUDA vanity key grinding script on an on demand AWS GPU instance to control cost on expensive compute
Outcome
  • Shipped a trading surface aligned with market timing and user validated flows
  • Automated vanity key pipeline that spins up grinding only when needed
TypeScriptReactSolanaCUDAAWS

Fusion — Decentralized Airdrop Platform

PsyFi

Mass airdrops of fully collateralized options on Solana with Merkle-tree claim verification.

Problem
No reliable decentralized platform for distributing options as airdrops, creating inefficiency and centralized control.
My contribution
Designed the architecture and built the web application for collateralized options airdrops on PsyOptions.
Approach
  • PsyOptions American-style options protocol for minting
  • Merkle trees for claim handling
  • First-come, first-served mechanism for limited airdrops
Outcome
  • Enabled mass airdrops for fully collateralized options on Solana assets
TypeScriptNext.jsRustSolanaPsyOptions

PsyLend Mobile

PsyFi

React Native borrow/lending app for decentralized option vault positions on Solana.

Problem
Borrow/lending against DOV positions lacked a mobile experience when Solana Mobile launched.
My contribution
Led Android development and ported the lending front end to React Native days after Solana Mobile release.
Approach
  • Borrow and lend flows with Pyth and Switchboard oracle price data
  • Reserve ratio maintenance for leveraged DOV positions
Outcome
  • Enabled mobile liquidity against DOV positions and USDC/SOL lending yield
React NativeTypeScriptSolana

DeMUX

PsyFi

Tokenomics management web app for Solana DeFi protocol revenue allocation.

Problem
Projects needed flexible tools for holders to allocate protocol revenues toward buybacks, rewards, and related actions.
My contribution
Led development of the web application for revenue allocation strategies.
Approach
  • Holder-driven allocation workflows for Solana DeFi protocols
Outcome
  • Used by multiple teams building on Solana
TypeScriptReactSolana

Decentralized Rock-Paper-Scissors

Personal project — trustless Rock-Paper-Scissors on Solana with an Anchor on-chain program, commit–reveal proofs, and a hot-wallet manager.

Problem
Classic RPS requires trust; on-chain play needs cheating resistance without poor wallet UX.
My contribution
Solo build of the Solana program (Anchor/Rust) and React front end — commit–reveal fairness, game state on-chain, and hot-wallet UX.
Approach
  • Anchor program for game state and commit–reveal verification
  • Hashed commitment scheme with random seeds
  • Reveal phase for verifiable fairness
  • Hot wallet manager to reduce signing friction
Outcome
  • Playable trustless game at rockps.parhim.dev
RustAnchorReactTypeScriptSolana

Employee Timecard System

OnTraccr

Live timecard submission, multi-stage approval, OT calculation, and payroll export for construction teams.

Problem
Timecards needed budgeting, role-based approval chains, task notes, and live sync across users.
My contribution
Designed and implemented the end-to-end approval system and live sync — a core OnTraccr feature set.
Approach
  • Aggregated daily tasks with optional notes into timecards
  • Dynamic pay periods with anchor days
  • Submission and approval logging
  • Socket.io for live updates across sessions
Outcome
  • Enabled viewing, editing, approving timesheets and exporting payroll with granular data
ReactNode.jsSocket.ioMySQL

Digital Securities Research Dashboard

Atlas One

Unified research portal and live index for asset-backed digital securities.

Problem
Issuers were fragmented across APIs and niche venues with no vetted research home for investors.
My contribution
Designed and developed the portal plus pricing/index cron pipelines.
Approach
  • Graphs, analytics, news, and token directory
  • Cron jobs for live trade data from multiple sources
  • Running index from historical trading data
Outcome
  • Subscription access to exports and financials in a single research surface
ReactNode.jsKeystoneGraphQLPostgreSQL

Job Template Duplication

WizeHire

Support tooling to duplicate job templates and deep-link them, saving hours of daily manual work.

Problem
Support had to manually copy qualifications and descriptions into empty templates.
My contribution
Shipped Django REST duplication API and React Router deep-linking.
Approach
  • Replicate template structure while reusing shared features to limit DB growth
  • Deep links for viewing and editing templates
Outcome
  • Hours of daily support work saved via duplication and sharing
DjangoReact

Legacy Invite Workflow Port

WizeHire

Replaced a legacy PHP invite flow so customers no longer switched dashboards.

Problem
Candidates under a billing plan could only be invited from a legacy PHP dashboard.
My contribution
Wrote the Django REST API and React component with validation and error handling.
Approach
  • New API covering the missing workflow
  • React form with validation to retire legacy switching
Outcome
  • Reduced product complexity and improved UX by consolidating into the modern dashboard
DjangoReactPHP

TSV Candidate Import

WizeHire

Format-tolerant TSV importer for bulk candidate onboarding used by customer support.

Problem
Import formats changed frequently; pipeline breaks blocked customer onboarding.
My contribution
Built a PHP TSV parser with format validation and auto-detection across sources.
Approach
  • Regex-oriented parsing for large datasets
  • Arbitrary column support and format validators
  • Auto-detect formats such as Indeed and Breezy
  • Documented on Slab
Outcome
  • Bulk import without code changes for minor format shifts; hours of manual work removed
PHP

Skills

Technical capabilities

Grouped by how the work happens — individual technologies appear only when supported by experience.

  • Product engineering

    • TypeScript
    • React
    • Frontend architecture
    • Backend systems and APIs
    • Mobile applications
    • Dashboards
    • User experience implementation

  • Systems and infrastructure

    • Distributed systems
    • Cloud infrastructure (AWS, GCP)
    • Databases (PostgreSQL, MySQL, DynamoDB)
    • Messaging (RabbitMQ, Socket.io)
    • Containers and Kubernetes
    • Deployment and CI/CD
    • Reliability-minded delivery

  • Solana and decentralized finance

    • Solana transactions and modern client APIs
    • Public SDKs (@orca-so/tx-sender, orca_tx_sender)
    • Integrations and partner tooling
    • Liquidity products and CLMM workflows
    • DeFi application development

  • Data and product analytics

    • Mixpanel
    • Event instrumentation
    • Funnels and cohorts
    • Retention analysis
    • Dashboard development
    • Experiment planning
    • Product insights

  • AI enabled development

    • LLM assisted engineering workflows
    • Structured context for code generation
    • Automated test scaffolding and review
    • Human in the loop validation

  • Leadership and product delivery

    • Engineering management
    • Technical direction
    • Cycle planning and scoping
    • Prioritization
    • Stakeholder communication
    • Partner alignment and BD
    • Cross-functional execution

AI accelerated engineering workflow

LLM assisted TDD and PR review at Orca

Development problem
Growing product surfaces and partner deliverables increased test and review overhead without proportional headcount growth.
Workflow before AI
Engineers wrote tests manually after implementation. Pull request reviews relied on ad hoc checklists and reviewer memory of edge cases.
Information supplied to models
Module boundaries, existing test patterns in the repo, acceptance criteria, and the full diff under review.
How context was structured
Repo conventions, related test files, interface contracts, and task specific constraints bundled into structured prompts rather than open ended questions.
What models generated
Unit test scaffolds, edge case suggestions, and PR review comments highlighting risk, missing coverage, and consistency issues.
Testing and review
All generated tests run in CI. Engineers review assertions, fixtures, and async behavior before merge. Review comments are validated against the actual diff.
Failure modes observed
Overfit tests that mirror implementation too closely, missed race conditions in async Solana code, and occasional hallucinated APIs that do not exist in the codebase.
What humans remained responsible for
Architecture decisions, merge approval, production behavior validation, and final judgment on test quality and review findings.
Observed result
Faster test coverage on new features and partner integrations without lowering the review bar. The workflow is used across the team for TDD assistance and PR review.
Additional experience
  • Node.js / Express / Hapi
  • Next.js
  • React Native
  • Redux / Recoil
  • Vue.js
  • Angular / AngularJS
  • Django
  • PHP
  • Rust / Anchor
  • Python / Keras / OpenCV
  • Java / Android
  • GraphQL
  • D3.js
  • Docker
  • MQTT
  • Jenkins / CircleCI / GitHub Actions