Quality Assurance Engineer

Job description

About the Company

Our client is a fintech startup in NYC and London backed by some of the world’s leading investment banks, building a next-generation data brokerage platform.

About the Role

Our client is looking for a QA Engineer who takes ownership of product and platform quality end-to-end. This role sits close to backend engineering and DevOps and focuses on:

• Preventing regressions
• Improving test coverage
• Ensuring reliability across APIs, data pipelines, and workflows
• Making quality visible and measurable

You’ll help define how quality works at the Company, not just execute test cases.

Responsibilities

Quality Engineering (Core)

• Designing and maintaining automated test suites
• Writing and maintaining:
• API tests
• Integration tests
• End-to-end workflow tests
• Validating:
• Data ingestion flows
• File-based workflows (CSV / Parquet)
• Region-specific and customer-isolated data paths
• Testing error cases, edge cases, and failure modes
• Ensuring backward compatibility of APIs and schemas

Tooling & Process

• Improving test strategy across environments (UAT, staging, prod-like)
• Integrating tests into CI/CD pipelines
• Helping define release quality gates
• Working with engineers to reproduce, isolate, and fix issues
• Improving documentation around testing and known limitations

Collaboration

• Working closely with backend engineers and frontend engineers
• Reviewing feature designs from a testability perspective
• Participating in architecture discussions with a quality lens

Our Client's Tech Stack (Context)

• Backend: Python 3.11+, FastAPI
• Frontend: TypeScript, React
• Infra: AWS (ECS/Fargate, S3, RDS, CloudFront)
• Data: PostgreSQL, CSV / Parquet
• CI/CD: GitLab CI
• IaC: Terraform
• Testing: Pytest, Postman/Newman, custom scripts

You don’t need to know everything — but you should be comfortable navigating a modern backend stack.

Qualifications

Must-have

• Experience in QA / Quality Engineering for backend or API-driven systems
• Strong understanding of automated testing
• Ability to read and reason about backend code (Python or similar)
• Experience testing APIs (REST, auth, error handling)
• Good understanding of data validation and edge cases
• Structured, methodical approach to quality

Nice-to-have

• Experience with Python + Pytest
• Familiarity with CI/CD pipelines
• Experience testing data-heavy or file-based workflows
• Exposure to regulated environments (fintech, banking, healthcare)
• Understanding of cloud-based architectures (AWS)

What You’ll Like at our Client

• QA treated as an engineering discipline
• Early involvement in design and architecture
• No “throw it over the wall” culture
• High trust, low bureaucracy
• Real production impact
• Remote-friendly, flexible working style
• Competitive compensation based on experience

Equal Opportunity Statement

Our client is committed to diversity and inclusivity.

Extra information

Status

Open

Education Level

Secondary School

Location

City of London

Type of Contract

Full-time jobs

Published at

17-02-2026

Profession type

Accountancy

Full UK/EU driving license preferred

No

Car Preferred

No

Must be eligible to work in the EU

No

Cover Letter Required

No

Languages

English