Pulsar Heavy Industries delivers robust, scalable software that powers backend systems, embedded devices, and decentralized infrastructure. With two decades of experience spanning blockchain protocols, financial systems, and bare-metal code, PHI builds technical foundations designed to endure—whether you're deploying smart contracts, shipping firmware, or building resilient cloud systems.
I'm Eran Rundstein, a principal-level software engineer with two decades of experience spanning blockchain, embedded systems, and financial infrastructure. My career includes leadership roles at Sentz (f.k.a Mobilecoin), where I architected privacy-preserving blockchain infrastructure used by millions, and at FundersClub, where I built financial software transacting and managing millions of dollars in assets.
Pulsar Heavy Industries is how I bring that experience to bear—independently delivering robust technical solutions with craftsmanship and clarity.
PHI is a solo consultancy. I work transparently—shared repositories, weekly updates, async-friendly communication, and direct access via Slack or Signal. I integrate cleanly into technical teams and am comfortable leading initiatives, working async, and pairing with existing engineers. I am based in the Bay Area.
I've shipped for teams as small as two and as large as fifty, and I know how to plug in without creating drag. My code is written for clarity and longevity with extra care given to logging, observability, and testing.
If your project ever needs broader firepower, I'm well-networked with senior engineers I trust.
Results:
Built and scaled a robust ACH/wire payments system for FundersClub.
Result: $30MM+ in annual transaction volume, >99.97% uptime, flawless security record
Architected and implemented Ethereum/EVM blockchain integration enabling secure transactions for a digital asset trading platform.
Result: $5MM+ in successful transaction volume
Led smart contract development for a new ERC-20 token offering, focusing on security and compliance.
Result: Clean Trail-of-Bits security audit with no high or medium-risk issues
Defined scope, deliverables, and timeline with clear project phases and milestones.
Ideal for: Implementation projects, system rebuilds, architecture design
Typical duration: 2-6 months
Ongoing expertise and guidance to enhance your technical decisions and strategy.
Ideal for: Architecture reviews, technical direction, hiring support
Typical arrangement: Monthly retainer with defined hours
In-depth analysis of existing systems with actionable recommendations for improvement.
Ideal for: Performance issues, scaling challenges, security concerns
Typical duration: 2-4 weeks
Seamless integration with your engineering team for ongoing development needs.
Ideal for: Specialized expertise gaps, critical project acceleration
Typical arrangement: Part-time or full-time, 3+ month commitment
"Pulsar" evokes precision, reliability, and the steady, powerful energy sources found in deep space—reflecting the core engineering principles applied to every project. "Heavy Industries" signifies robust, foundational work built to last, and pays homage to the influential hacker collective L0pht Heavy Industries, pioneers in computer security and responsible disclosure.
Let's discuss your technical challenges and how we might solve them together.