Senior Software Development Engineer in Test (SDET)

Interactive Brokers Group, Inc. (NASDAQ: IBKR), a member of the S&P 500, is a global financial services company headquartered in Greenwich, Connecticut, with offices in over 15 countries. Through its affiliates, Interactive Brokers provides automated trade execution and custody of securities, commodities, foreign exchange, and prediction markets on over 170 markets in numerous countries and currencies.

For more than four decades, Interactive Brokers has focused on technology, automation, and innovation to provide clients worldwide with a sophisticated, unified platform to manage their investment portfolios. We serve individual investors, hedge funds, proprietary trading groups, financial advisors, and introducing brokers.

Our culture is driven by problem-solving, efficiency, and continuous improvement. We look for individuals who are intellectually curious, collaborative, and motivated to contribute to technology that helps simplify and enhance access to global financial markets. Interactive Brokers has consistently been recognized as a top broker by respected industry sources including Barron’s, Investopedia, Stockbrokers.com, and others.

This is Hybrid role (3 days in office /2 days remote)

About the team

The Compliance Surveillance team builds the systems that detect market manipulation and financial crime across millions of client accounts. Our platforms process more than 1 billion order events a day, and their correctness supports regulatory compliance and market fairness.

The role

We are looking for a senior software engineer who specializes in testing and quality. You will design, build, and own the test frameworks and quality infrastructure for our surveillance systems. This is a software engineering role, not a test-writing role. You will write production-quality code, make system design decisions, and own the architecture of how we test, measure, and monitor quality. You will work directly with developers and data scientists, with a direct line to engineering leadership.

What you'll do

• Design and evolve a scalable Python/pytest test framework with clean abstractions, fixtures, test data management, and parallel execution
• Make system design decisions for test infrastructure, treating it as a long-lived software product with its own architecture, code reviews, and maintainability standards
• Build test observability: dashboards, flaky-test detection, failure-trend reporting, and alerting
• Develop data quality checks for high-volume pipelines and databases, covering completeness, accuracy, and lineage
• Write integration, performance, and contract tests (verifying that services producing and consuming the same event streams stay compatible) for distributed, event-driven systems
• Triage failures with development teams and drive root-cause fixes
• Raise engineering quality standards across development and data science

Required

• Bachelor's degree in Computer Science, Mathematics, Statistics, Physics, or a related quantitative field
• 5+ years of professional software engineering experience, with strong production-quality Python
• Solid software engineering fundamentals: data structures, code review, and system design
• Experience designing and building a test framework, or a significant part of one, and maintaining it over time
• Deep pytest experience: fixtures, plugins, parametrization, and scaling large suites
• Git and CI/CD experience (e.g., Jenkins, GitHub Actions, GitLab CI)
• Strong written and verbal communication, with close attention to detail

Strongly preferred

• Experience testing data-intensive or distributed systems (pipelines, streaming, databases, APIs), including data quality and lineage tools (Manta, Ataccama, Great Expectations)
• Monitoring and observability tools (Grafana, Prometheus, Datadog, ELK)

Nice to have

• Performance and load testing (Locust, k6, JMeter)
• Contract testing (Pact, schema registries, or similar)
• Experience in financial services, trading, or regulated environments

Company Benefits & Perks

The anticipated base salary range for this role is $140,000 to $160,000 per year, based on skills, experience, and location. The offered salary is just part of the total compensation package. In addition to a competitive salary, the company offers both a discretionary cash bonus and a stock award, as well as a wide range of benefits, including healthcare, tuition reimbursement, and more.