Senior Test Automation Engineer / SDET

Role Overview

As a Senior Test Automation Engineer, you will build the test infrastructure of a crypto payment platform: custody, AML and transaction screening, stablecoin settlement. This is a horizontal engineering role serving all development squads, covering both our current platform and the new platform we are building. Your product is the infrastructure that makes testing cheap for every engineer: vendor mocks, fast CI feedback, reliable test suites, and easy-to-use test tooling. Success is measured by how cheaply and confidently the engineering team ships.

Key Responsibilities

Design and build stateful mocks and simulators of third-party vendor APIs (custody, KYC/KYB, screening providers), serving both the current and the new platform

Implement contract tests that run on schedule against real vendor sandboxes and catch unannounced API changes before they reach production

Build test data and environment tooling: one-command environments with meaningful state

Own the CI test pipeline: fast feedback on every pull request, heavier integration suites nightly and pre-release, parallelization

Eliminate flaky tests: quarantine, statistics, root-cause analysis, so the team trusts a red build

Create test-writing scaffolding (helper libraries, fixtures, object builders) and well-documented test patterns that also serve as templates for AI-assisted test generation

Coach engineers on writing effective tests through reviews and pairing, so that each team owns the quality of its own code

Build production-adjacent checks: post-deploy smoke tests, synthetic transactions, automated verification before traffic is switched to a service

Required Qualifications

5+ years as a software engineer with substantial test-infrastructure ownership (SDET, platform engineering, or backend engineering with heavy testing responsibility)

Strong TypeScript: our backend services and test automation are TypeScript

Experience building test frameworks and harnesses from scratch, not only writing tests on top of existing ones

Hands-on experience with a modern automation framework, i.e. Playwright

Experience designing test stages in CI/CD pipelines (e.g. GitLab CI), including parallelization and selective test execution

API testing and mocking/stubbing of third-party services

Proficient daily use of AI coding tools, with the ability to review AI-generated code quickly and critically

Prior crypto experience is optional; building a working understanding of crypto and stablecoin payment flows (custody, settlement, screening) on the job is a mandatory part of the role

High agency: this is a horizontal role without daily supervision; you find testing friction yourself, decide what to build, and defend its priority

Strong written and verbal communication in English

Preferred Experience

Fintech, payments, or crypto domain; understanding of testing money flows: idempotency, reconciliation, state machines

Contract testing tooling (e.g. Pact or similar)

Performance and load testing

Experience working in a regulated environment (financial services, healthcare)

Test management tooling such as TestRail

Reporting Structure

Reports to: Engineering Manager. You will align testing strategy with our QA Lead.

Why This Role

Build the test infrastructure of a crypto payment platform from scratch, with a greenfield platform as your first adopter

Your framework multiplies the output of every engineer in the organization

AI-first engineering culture: your test patterns directly power AI-assisted development

Location

Remote. EU, USA, Argentina, Brazil. A minimum of 4 hours of daily overlap with Central European working hours is required.

Compensation and Benefits

As an independent contractor, you'll enjoy the flexibility to determine how and when you deliver your work, while partnering closely with our team to meet agreed milestones and business objectives. Compensation and engagement terms will be outlined in your contractor agreement.

Additional Benefits

Company issued laptop

Technology Accessories

Annual In-Person Full-Team Meetup

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About Cyclops

Cyclops is the first stablecoin and crypto infrastructure platform built exclusively for the payments industry. With low and no code solutions, Cyclops is the fastest way for payments companies to bring crypto and stablecoin offerings to market. Founded by crypto and payments industry veterans who built crypto solutions for Shift4, Cyclops enables crypto acceptance, stablecoin settlement and stablecoin payouts for payments companies.

Cyclops has raised a seed round and, more recently, a $20M Series A to accelerate the growth of the most complete stablecoin platform. We move fast, we think rigorously, and hold ourselves to the highest standard in the industry.

Cyclops Culture

Don’t join Cyclops if you’re looking for a typical 9-5. The culture we’ve built is one of first-principles thinking and relentless execution. We wake up every day excited to deliver great products worthy of the world’s best companies. Everyone who works at Cyclops must have a founder mindset, where no problem is too big to solve.

Originally posted on Himalayas