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Referment

Full Stack Engineer (4E98980)

North America

September 6, 2026 at 6:31 AM

✨ AI summary

Location

  • Philadelphia, PA

Languages

  • C++
  • Rust
  • Solidity
  • Vyper

Cloud Services

  • AWS
  • GCP
Full Stack Engineer

Prediction Markets/DeFi/FinTech/Early-Stage Startup

We’re working with an ambitious, early-stage fintech company building the infrastructure behind the next generation of prediction markets. Looking for a Full Stack Engineer to join the engineering team at a pivotal stage of the company’s growth - this is a high-impact role for someone who wants to work close to the founders, take genuine ownership and help build a novel financial product from the ground up.

If you’re the kind of engineer who would rather ship, learn and iterate than spend months planning, this could be a very interesting opportunity.

The Role

You’ll play a key role in building the company’s core product, infrastructure and risk systems. Working directly with the founders and other senior engineers, you’ll have significant autonomy and responsibility - taking ideas from initial concept through to production. You’ll be involved across the stack, with the opportunity to influence both the technical architecture and the product itself.

What You’ll Be Doing

Design, build and iterate on the frontend product and backend architecture

Develop and improve the risk engine powering margin and lending systems

Own infrastructure, deployments and system reliability end-to-end

Take ownership of features and products from idea through to shipped code

Work closely with the founders to help shape product and technical decisions

Continuously improve performance, scalability and the overall user experience

What We’re Looking For

We’re looking for an ambitious engineer who combines strong technical ability with curiosity, initiative and a bias towards action.

You’ll Ideally Have

Strong experience building backend systems, ideally in a high-scale environment

Experience designing, testing and implementing UI/UX

An interest in or experience with quantitative systems, risk, trading infrastructure or DeFi protocols

A preference for shipping and iterating rather than over-planning

A genuine interest in, or understanding of, prediction markets

Experience matters, but the team places significant emphasis on drive, adaptability and the ability to learn quickly.

It would be a major plus if you have experience with:

DevOps and cloud infrastructure, particularly AWS and/or GCP

Statistics, data and feature engineering

MLOps

Blockchain technology and smart contract development, particularly Solidity or Vyper

Low-level languages used in production systems, particularly C++ or Rust

The team is based in Philadelphia, so candidates already in the area - or those open to relocating - will be particularly attractive.

Why join?

This is an opportunity to get involved early in a company attempting to build something genuinely new within financial markets.

You’ll Have

Direct exposure to the founders

Significant ownership and autonomy

The opportunity to influence both the product and engineering direction

A chance to work on challenging problems spanning fintech, DeFi, risk and trading

A highly ambitious, technically minded team

Plenty of opportunity to learn and grow as the company develops

Benefits

Healthcare

Unlimited PTO

401(k) retirement plan

Annual book budget

Software budget

If you’re an ambitious Full Stack Engineer looking for a role where you can have a genuine impact - rather than simply owning one small part of a much larger machine - we’d love to hear from you.

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