Senior Software Engineer, Backend (Test Enablers) 100% remote)

The Test Enablers team builds and operates platforms that allow engineering teams to test with confidence. Its systems provide synthetic identities, test-data seeding, mocking, deterministic testing workflows, and load testing.

Developer Productivity’s mission is to accelerate software development while keeping systems reliable for customers. The long-term goal is to scale to 1,000 pull requests per day by December 2027 through validation systems that are fast, trustworthy, automated, and scalable.

This role designs and builds platform capabilities that help engineers validate product changes earlier, run safer load tests, reduce reliance on expensive end-to-end-only validation, and improve the reliability of CI signals. It also helps prepare testing infrastructure for AI-assisted development workflows, where agents and humans need deterministic, observable, and actionable validation feedback.

What You’ll Do

• Design, build, and maintain scalable systems for synthetic identities, test-data seeding, mocking, load testing, and deterministic validation workflows.
• Evolve testing strategy from broad end-to-end-heavy validation toward a scalable model with stronger component, integration, contract, performance, and targeted end-to-end testing.
• Build platform capabilities that make production-like load testing safer, more repeatable, and easier to operate.
• Improve the test platform’s reliability, observability, and ease of adoption for other teams.
• Partner with product engineering and infrastructure teams to improve test-signal quality, reduce false failures, and support faster validation loops.
• Lead medium-to-large technical projects from ambiguous problem definition through design, implementation, rollout, and operational ownership.
• Improve reliability and operational maturity through dashboards, SLOs, alerts, runbooks, and clear ownership models.
• Reduce manual operational load for load testing, including test-data creation, environment setup, reporting, and failure diagnosis.
• Write high-quality, maintainable code that is easy to understand and extend.
• Contribute to technical specifications, RFCs, ADRs, project plans, and other asynchronous artifacts that align teams around technical decisions.
• Review code and technical designs, provide constructive feedback, and help raise engineering standards.
• Mentor engineers and help build a culture of practical testing excellence.

What We Look For

• 5+ years of software engineering experience.
• Strong backend engineering experience with Python, Kotlin, Java, or similar languages.
• Experience designing, building, and operating distributed systems, platform infrastructure, internal developer tools, or testing infrastructure.
• Strong ownership and ability to independently drive ambiguous technical work to completion.
• Experience improving system reliability, observability, operational maturity, and maintainability.
• Ability to collaborate across engineering teams and influence technical direction through clear communication.
• Excellent written and verbal communication skills, including asynchronous artifacts such as technical specifications, RFCs, ADRs, and project plans.
• Strong engineering fundamentals across system design, testing, debugging, reliability, and production operations.
• Operational ownership of critical internal testing platforms, including reliability, observability, alerting, runbooks, and incident readiness.
• Experience with test automation frameworks, test-data systems, mocks, contract testing, integration testing, load testing, and CI/CD platforms.
• Ability to balance pragmatic delivery with long-term technical quality.
• Passion for improving developer productivity and product quality through scalable, automated, reliable systems.

Total Rewards

Base Pay Grade - N3
308 000 zł - 428 000 zł

Base-pay ranges and placement within those ranges are determined based on several factors, including role, experience, and job-related skills.

In addition to base pay, employees in this role are eligible to receive equity from the parent company each year.

Equity Grade - 4 (awarded in US Dollars)

• New-hire equity: $32,000-$48,000
• Annual refresh: $10,000
• Reward equity: $0-$150,000

Flexible spending wallets for technology and well-being-related needs are reimbursable up to 1390 zł per month.

Benefits

• Competitive paid time off, paid public holidays, and additional paid Away Days.
• Comprehensive private healthcare through Lux Med’s Platinum package.
• MultiSport card.
• Learning and development programs.
• Family healthcare support through Maven and parental-leave support through Parentaly.
• Mental well-being support through Lyra, including up to 12 confidential counseling or coaching sessions each year for employees and household members.
• Financial well-being support through Northstar, with unlimited access to Certified Financial Advisors and planning tools at no cost.
• Employee Resource Groups that foster connection and inclusion.
• Eligibility for creative tax benefits, subject to applicable law, role, and policy.

This job description is not a contractual document and is not intended to have binding force.