Web3 Product Engineer at Confidential

About Us

We exist to make open finance secure enough for billions of people to trust with real value. We believe sound money and reliable financial infrastructure should be basic human rights — and that Web3 can only achieve that if it is secure by design.

Traditional audits alone don't solve that problem. We connect every layer of protocol security through collaborative audits, audit contests, bug bounties, coverage, and AI-powered analysis. Each product reinforces the others, forming a lifecycle system that protects protocols from development through live operations.

We are the only security provider that offers financial coverage after every audit, backing our work with up to $500K in post-launch exploit protection. We have run more public audits than anyone in the space, securing code for the Ethereum Foundation, Aave, Optimism, Cosmos, MakerDAO (Sky), and dozens of other top teams.

We are backed by Alliance, Archetype, IDEO, CoinFund, Lattice, Spartan, A Capital, and other leading Web3 and Silicon Valley investors.

Our Culture

We are a performance-driven, high-ownership environment built for people who care about the mission and can handle the pace. The team shares a few common traits:

Mission focus: Everyone is here to build the most trusted financial coordination system in history. Nothing less.
Hard, smart work: Our edge is thinking clearly, working longer, and executing better than anyone else. Every decision starts from first principles.
Owner mentality: Team members act like owners, not employees. Nothing is "someone else's problem."
Builder mentality: Everyone contributes directly to output. There are no pure managers or idea people.
Customer proximity: We stay close to the protocols we protect and build with their perspective in mind.
Professional-athlete standards: Performance is measured, meritocratic, and transparent. High output is the baseline, not the exception.
Directness and transparency: Feedback is honest and fast. Clarity beats comfort, and open communication drives better results.

The Role

We are building an AI product for blockchain security. The core is already built and in customers' hands. What it now needs is someone to sit between our customers — protocol teams shipping real money on-chain — and the product, owning the loop from "what do they actually need" to "shipped."

This is a generalist product engineering role. You will talk to customers, decide what matters, and ship it yourself. You will move across the entire product surface: the UI that protocol teams use to submit code and read findings, the prompting and judging pipelines that determine which issues reach the customer, the benchmarks that measure whether the system is genuinely improving, and the product calls in between.

The role is explicitly broad. We are looking for breadth, judgment, and ownership over deep specialisation in a single area.

We are looking for a senior Python developer with a strong track record of shipping software products to real users. You ship UI as comfortably as you ship backend. You use LLMs in your daily workflow and have shipped at least one feature whose value depends on LLM output quality. You are entrepreneurial, highly self-directed, and product-minded.

Your role in one sentence: Own the loop from customer need to shipped product — across UI, prompting, benchmarking, and the product calls in between.

If you are serious about applying and have read this far, please include 4-sentence answers to each of the following three questions:

What is the most recent Python-based product you shipped to real users, and what was your role across product decisions, backend, and UI?
This role spans customer conversations, UI work, prompting/eval, and product judgment in a single seat — which of these have you done before, and which would be new for you?
Why should we select you over hundreds of other applicants?

Day-to-Day Responsibilities

Talk directly to protocol teams using the product, identify what they actually need, and convert those conversations into concrete product and UI changes (10x weight)
Ship those product and UI changes yourself — you write the code, not just the spec (9x weight)
Improve the prompting, judging, deduplication, and false-positive reduction pipelines that determine which findings reach customers (8x weight)
Build and maintain benchmarks to measure whether changes actually improve the product (7x weight)
Make product calls in ambiguous situations and push work forward without heavy direction (7x weight)
Work closely with our developers and security researchers to stay aligned on goals and ship the right things (6x weight)
Stay current with practical advances in AI and LLMs that improve developer velocity and product quality (4x weight)

Requirements

Senior-level Python experience with a track record of shipping SaaS or software products to production
Comfort owning UI work end-to-end in a modern frontend stack (Next.js / TypeScript) — thinking through UX flows, mapping possible states, and translating that into a working UI yourself. Not a designer role, but you genuinely enjoy this part of the job
Daily use of LLMs in your workflow, plus hands-on experience shipping a feature whose value depends on LLM output quality — prompting, judging, retrieval, evals, or similar
Comfortable on calls with technical customers — this is a recurring part of the job, not occasional; you enjoy turning a customer conversation into a product change
High agency: comfortable working without a PM, designer, or engineering manager handing you scoped tickets — you decide what to build, scope it yourself, and ship it
Working hours that meaningfully overlap with US or EU timezones

Nice to Have

Experience setting up evals, judging pipelines, or benchmarking for LLM systems to measure effectiveness and catch regressions
Familiarity with prompt engineering, evaluation frameworks, retrieval, and vector databases
Prior experience in fast-moving, underdefined startup environments
Familiarity with audits, bug reports, or security workflows
Familiarity with Solidity, EVM tooling (Foundry, Hardhat), or smart contract security

This Role Is Not a Fit If You Are:

A pure backend specialist, pure prompt engineer, or pure UI designer
Someone who can discuss ideas but rarely ships product yourself
Dogmatic about one function only and uninterested in working across the stack
Without Python experience or without genuine interest in UI work — both have been the most common reasons we have passed on otherwise strong candidates

What's In It for You

Attractive base salary (payable in fiat or crypto) + material tokens/equity + benefits
Flexible time-off policy
Comprehensive healthcare
Multiple offsites each year in destinations such as France, Argentina, Thailand, and more
Own a core product area at the company leading the AI shift in blockchain security
Direct access to the decision-making process in all areas of the organisation, with the ability to work closely with the founders
Move quickly and get things done on a small, elite team that has already made a significant impact in the crypto space
Play a major role in defining the future of the organisation and accomplishing the goal of making crypto and DeFi accessible to everyone

Web3 Product Engineer