Senior Load Tester

🏢 Summary: Office-based QA Automation Engineer role focused on building and maintaining automated UI, API, and end-to-end tests for a casino gaming platform. The position involves owning CI/CD test pipelines, ensuring high test coverage, and performing API, WebSocket, and performance testing. The role requires close collaboration with developers and proactive quality ownership in a fast-paced environment. 🗂️ Requirements: 5+ years of QA automation experience, Strong hands-on experience with Playwright or Cypress or Selenium, Strong TypeScript skills, Strong JavaScript skills, Experience building and maintaining CI/CD test pipelines, Experience in API testing including contract testing, Experience in WebSocket testing, Experience with load testing tools (k6 or Gatling or JMeter), Experience with Git, Fluent English (B2+ level) 📃 Skills: TypeScript, JavaScript, Playwright, Cypress, Selenium, WebSocket, k6, Gatling, JMeter, Git, CI/CD 🏢 Description: Employer: International cassino games studio Location: Warsaw (4 days from the office, 1 day remotely) Salary: 5 000 - 6 650 EUR on B2B Cooperation model: B2B Start date: ASAP Recruitment process: 3 online interviews Technology stack: Typescript, Javascript, Cypress or Selenium or Playwright, WebSocket Your role is to: -> Write and maintain automated tests across UI, API, and end-to-end flows; -> Build reliable test pipelines and keep them running cleanly within CI/CD; -> Dig into test failures and get to the root cause — not just mark them as flaky and move on; -> Work with developers to understand how features are built and test them properly; -> Cover API flows thoroughly including chained requests, contracts, and WebSocket behavior; -> Run performance and load tests on critical platform areas and flag what needs fixing; -> Keep test coverage healthy and proactively fill gaps as the product evolves; Your skills and experiences: -> 5+ years of QA automation experience with real, hands-on work to show for it; -> Strong with Playwright, Cypress, or Selenium — you've built with them, not just maintained them; -> Solid TypeScript and JavaScript skills, writing code that's clean and easy to maintain; -> Comfortable owning CI/CD test pipelines end to end; -> Good API testing experience including contract and WebSocket testing; -> Familiar with load testing tools like k6, Gatling, or JMeter; -> Fluent with Git and working within agile teams; -> You work independently and take ownership of your output; -> You care about quality and it shows in your work; -> You communicate clearly and flag issues before they become problems; -> You're collaborative — you work well with developers and product alike; -> Fluent English - at least B2+ level;

🏢 Summary: Senior QA Automation Lead role focused on designing, implementing, and maintaining automated test frameworks for UI, API, end-to-end, and performance testing within CI/CD pipelines. The position includes leading a small QA team and owning test coverage, reliability, and defect resolution across product areas. B2B contract, office-based in Warsaw, with responsibility for integrating automated testing into the development lifecycle. 🗂️ Requirements: 6+ years QA automation experience, Ownership of test automation codebase, Hands-on experience with Playwright, Cypress or Selenium, Proficiency in JavaScript or TypeScript, Experience with CI/CD-integrated test pipelines, API testing experience, Experience testing RESTful APIs and WebSockets, Experience with Git workflows 📃 Skills: Playwright, Cypress, Selenium, JavaScript, TypeScript, Jenkins, Git, Postman, Supertest, REST, WebSocket, CI/CD 🏢 Description: Employer: International cassino games studio Location: Warsaw (4 days from the office, 1 day remotely) Salary: 5950 - 7600 EUR on B2B Cooperation model: B2B Start date: ASAP Recruitment process: 2 online interviews and recruitment task Technology stack: Playwright or Cypress or Selenium, GIT, Jenkins, Javascript or Typescript Your role is to: -> Own the design, implementation, and maintenance of automated test frameworks covering UI, API, and end-to-end testing; -> Lead a small team of QA engineers, providing hands-on guidance, code reviews, and day-to-day direction; -> Take responsibility for test coverage across assigned product areas, ensuring regressions are caught before they reach production; -> Build and maintain performance test scripts that are reusable, version controlled, and easy to update as the product changes; -> Integrate and maintain automated test suites within CI/CD pipelines, owning the feedback loop for your team; -> Define and enforce testing standards, processes, and documentation within the squad; -> Collaborate with developers and product managers to review requirements and translate them into thorough test plans; -> Own defect triage and test failure analysis, coordinating directly with engineers to drive resolution; -> Continuously improving test reliability, speed, and coverage, proactively flagging risks to engineering leads; Your skills and experiences: -> 6+ years of QA automation experience, with demonstrated ownership of a test automation codebase; -> Solid hands-on experience with frameworks such as Playwright, Cypress, or Selenium; -> Strong proficiency in TypeScript and/or JavaScript for writing and maintaining test scripts; -> Proven experience owning CI/CD-integrated test pipelines (GitHub Actions, Jenkins, or similar); -> Solid API testing experience using tools such as Postman or Supertest; -> Familiarity with RESTful API and WebSocket testing for real-time features; -> Good understanding of Git workflows and agile delivery practices; -> Strong communicators who can represent quality concern clearly to developers and product stakeholders; -> Ownership mentality — takes accountability for test outcomes and drives issues through to resolution; -> Organized and methodical, able to manage workload across multiple features and release cycles; -> Collaborative team lead who enjoys growing junior engineers and raising the quality bar;

🏢 Summary: Office-based Frontend Developer role focused on building responsive and scalable web applications for an online casino platform using modern and legacy frontend technologies. The position involves close collaboration with backend and design teams to deliver high-performance, user-friendly interfaces. B2B contract with competitive salary and immediate start. 🗂️ Requirements: Extensive experience with React, NextJS and jQuery, Strong knowledge of TypeScript and Vanilla JavaScript, Experience with Webpack or Vite, Experience with state management libraries (Redux or MobX), Experience integrating RESTful APIs and WebSockets, Experience building scalable, high-performance frontend applications, Knowledge of Git and CI/CD pipelines, Experience with automated testing frameworks, Fluent English (B2+ level) 📃 Skills: React, NextJS, jQuery, JavaScript, TypeScript, Redux, MobX, REST, WebSockets, Webpack, Vite, Git, CI/CD 🏢 Description: Employer: International cassino games studio Location: Office-based position in central Warsaw Salary: up to 6600 EUR net Cooperation model: B2B Start date: ASAP Recruitment process: 2 online interviews and recruitment task Technology stack: React, JS, TypeScript, Redus, RestfulAPI, NextJS Your role is to: -> Develop responsive and scalable frontend applications using Jquery, NextJS, React; -> Collaborate with backend engineers to define and integrate APIs and services that provide smooth user experience; -> Work with Webpack and or Vite for efficient bundling and build processes, optimizing the delivery of frontend assets; -> Work with Typescript and Vanilla JS; -> Ensure the platform adheres to high standards of usability and performance; -> Work closely with designers to ensure UI/UX designs are fully implemented and optimized for the user; Your skills and experiences: -> Extensive experience with modern and legacy frontend frameworks such as Jquery, NextJS, React; -> Expertise with Webpack/Vite for module bundling and build optimizations; -> Strong knowledge of TypeScript and its use in frontend development; -> Proven experience in building scalable, high-performance applications that provide smooth user experience; -> Experience with state management libraries such as Redux or MobX or others; -> Familiarity with RESTful API integration and WebSockets for real-time communication; -> Knowledge of version control systems (e.g., Git), CI/CD pipelines, and automated testing frameworks; -> Excellent communication and collaboration skills, with the ability to bridge the gap between design and development; -> Analytical mindset with a focus on performance optimization and solving complex problems; -> Ability to manage multiple tasks and prioritize effectively in a fast-paced environment; -> Fluent English - at least B2+ level; If interested, please apply safely through this portal (application rules are in accordance with GDPR). Employment agency Nr 17138.

🏢 Summary: Remote (later hybrid in Warsaw) Senior Load Test Engineer role focused on designing, executing, and automating performance testing for large-scale production systems. The position involves identifying bottlenecks, analyzing metrics, and integrating load tests into CI/CD pipelines to ensure platform stability and scalability. You will work closely with backend teams to maintain high performance under heavy user traffic. 🗂️ Requirements: 5+ years performance and load testing experience, Experience with large production systems, Proficiency with k6, Gatling, JMeter, or Locust, Ability to create complex load testing scripts from scratch, Strong understanding of backend systems and databases, Knowledge of infrastructure behavior under heavy load, Ability to analyze metrics from monitoring tools, Knowledge of HTTP, WebSockets, real-time protocols, Experience testing APIs under load, Experience with CI/CD pipeline integration, Proficiency with Git 📃 Skills: k6, Gatling, JMeter, Locust, Grafana, Datadog, NewRelic, HTTP, WebSockets, CI/CD, Git, APIs, Databases 🏢 Description: Please note: Remote mode but later hybrid in Warsaw Position Overview We are looking for a Senior Load Test Engineer who is passionate about performance testing. You understand how systems work when many users use them at the same time. You know how to find problems before real users experience them. You can clearly explain what is wrong and why it needs to be fixed. You work independently, manage your testing process from start to finish, and care about keeping our platform fast and stable as it grows. Key Responsibilities Plan and run load, stress, spike, and long-running tests on important parts of our platform. Study the results and find exactly where and why performance becomes worse. Work closely with backend engineers to understand the system and identify the real bottlenecks. Create and maintain performance test scripts that can be reused, stored in version control, and easily updated when the product changes. Add performance tests to CI/CD pipelines so problems can be detected early. Set performance goals and limits together with engineering and product teams. Watch how the platform behaves under load using monitoring tools and connect metrics with test results. Write clear reports and give practical recommendations to engineering teams. Qualifications 5+ years of practical experience with performance and load testing for large production systems. Strong experience with tools such as k6, Gatling, JMeter, or Locust, including creating complex scripts from the beginning. Good understanding of backend systems, databases, and how infrastructure behaves under heavy load. Ability to read and understand metrics from tools like Grafana, Datadog, New Relic, or similar. Good knowledge of HTTP, WebSockets, and real-time communication protocols. Experience testing APIs under load, including authentication flows, many users at the same time, and stateful scenarios. Familiar with CI/CD pipelines and adding performance tests to automated build processes. Comfortable using Git and working in agile engineering teams. Soft Skills Naturally curious — you like to understand why a system behaves in a certain way under pressure. Strong analytical thinking — you can review many metrics and quickly find the most important problem. Good communication — you can explain complex performance issues clearly to both developers and product managers. Self-motivated — you do not wait for someone to tell you there is a problem; you actively look for it.

🏢 Summary: Remote Hardware & Systems Testing Specialist role in the regulated gaming industry, combining technical inspections, hardware/software testing, and compliance verification across Poland and Europe. The position involves regular travel to client sites to perform device inspections, prepare technical documentation, and ensure adherence to industry regulations. Full onboarding and certification are provided to support independent work in a highly regulated environment. 🗂️ Requirements: Degree in IT, Electronics or Electrical Engineering, Fluent Polish, Communicative English, Willingness to travel regularly across Poland and Europe, Active Category B driving licence, EU passport or valid right to travel within Europe, Ability to work independently, Attention to detail, Basic MS Office and computer skills 📃 Skills: Hardware, Software, Testing, Inspection, Documentation, Compliance, MSOffice 🏢 Description: Have you ever wondered how sports betting and online gambling platforms actually work behind the scenes? We are currently looking for a Hardware & Systems Testing Specialist to join a well-established international company operating within the gaming and gambling industry. The company has been present on the market for over 35 years and works with some of the biggest gaming providers globally, ensuring software quality, technical integrity and regulatory compliance across casino and betting products. 📍 Location: Remote role based around Warsaw / Kraków / Łódź area 🚗 This is not a typical office-based remote role — the position involves regular travel to client sites across Poland and occasionally other European countries as part of inspections, testing and certification activities. 💰 Salary: around 98,400 PLN annually company car provided full equipment provided Main responsibilities include: testing gaming hardware and software systems, conducting technical inspections of devices, preparing technical documentation and reports, verifying compliance with industry regulations, supporting clients during inspection and testing processes. Ideal background: Degree in (IT / electronics / electrical engineering preferred), fluent Polish and communicative English, good organisational skills and attention to detail, ability to work independently and under pressure, willingness to travel regularly across Poland and Europe, active driving licence (Category B), EU passport or valid right to travel within Europe, basic MS Office / computer skills. The company provides full onboarding and certification/training process required to independently perform inspections within the regulated gaming industry.

🏢 Summary: Long-term B2B opportunity for an experienced Performance Test Engineer to design and execute performance testing for web applications, APIs, microservices, and PEGA-based systems. The role focuses on building and maintaining LoadRunner Enterprise scripts, analyzing bottlenecks, and supporting performance optimization across complex enterprise environments. Work is hybrid in Poland with English as the project language. 🗂️ Requirements: Minimum 4+ years of hands-on Performance Testing experience, Strong expertise in LoadRunner Enterprise (LRE), Practical experience with TrueClient scripting, Strong experience with HTTP/HTML scripting, Experience in API performance testing, Understanding of microservices architecture, Experience in performance testing of PEGA applications, Ability to analyze performance bottlenecks, Good command of English 📃 Skills: LoadRunner, LRE, TrueClient, HTTP, HTML, API, Microservices, PEGA, Dynatrace, AppDynamics, Splunk, Sysdig, Grafana, CI/CD, SQL 🏢 Description: Location: Gdańsk, Gdynia or Warsaw, Poland Working model : hybrid 2-3 days per week from the preferred office Language: English Contract: B2B, long-term, 12+ months We are looking for an experienced Performance Tester / Performance Test Engineer to join a project focused on performance testing of web-based applications, API, microservices, and PEGA-based systems. This role is ideal for someone with strong hands-on experience in LoadRunner Enterprise (LRE) , including scripting with TrueClient and HTTP/HTML protocols , as well as a solid understanding of API and microservices performance testing. Responsibilities Design, develop, execute, and maintain performance test scripts using LoadRunner Enterprise (LRE) . Create, enhance, and maintain TrueClient and HTTP/HTML scripts for web-based applications. Conduct performance, load, stress, endurance, and scalability testing. Prepare performance test plans, workload models, test scenarios, and test reports. Analyze application and system performance bottlenecks. Provide recommendations for performance tuning and optimization. Perform API and microservices performance testing, including service virtualization where required. Monitor system performance using tools such as Dynatrace, AppDynamics, Splunk, Sysdig, Grafana , or similar. Collaborate with Development, QA, Infrastructure, and Business teams to identify and resolve performance issues. Support performance testing activities for applications built on the PEGA platform. Requirements Minimum 4+ years of hands-on experience in Performance Testing . Strong expertise in LoadRunner Enterprise (LRE) . Practical experience with TrueClient scripting . Strong experience with HTTP/HTML scripting . Good understanding of API and microservices architecture . Experience in performance testing of PEGA applications . Strong analytical, troubleshooting, and problem-solving skills. Good command of English. Nice to have Experience with monitoring tools such as Dynatrace, Sysdig, AppDynamics, Grafana, and Splunk . Experience with CI/CD integration for performance testing. SQL knowledge for backend validation. Good communication and stakeholder management skills. What we offer Opportunity to work on complex enterprise-level systems. Collaboration with experienced Development, QA, Infrastructure, and Business teams. Work with modern performance testing and monitoring tools. Project locations available in Gdańsk, Gdynia or Warsaw . International working environment with English as the main project language. Long-term cooperation.

🏢 Summary: Long-term B2B contract for an experienced Performance Test Engineer to design and execute performance testing for web applications, APIs, microservices, and PEGA-based systems using LoadRunner Enterprise. The role focuses on scripting, analysis, monitoring, and optimization of enterprise-level systems in a hybrid model in Poland. 🗂️ Requirements: 4+ years of hands-on experience in Performance Testing, Strong expertise in LoadRunner Enterprise (LRE), Practical experience with TrueClient scripting, Strong experience with HTTP/HTML scripting, Understanding of API architecture, Understanding of microservices architecture, Experience in performance testing of PEGA applications, Ability to analyze and troubleshoot performance issues, Good command of English 📃 Skills: LoadRunner, LRE, TrueClient, HTTP, HTML, API, Microservices, PEGA, Dynatrace, AppDynamics, Splunk, Sysdig, Grafana, SQL, CI/CD 🏢 Description: Location: Gdańsk, Gdynia or Warsaw, Poland Working model : hybrid 2-3 days per week from the preferred office Language: English Contract: B2B, long-term, 12+ months We are looking for an experienced Performance Tester / Performance Test Engineer to join a project focused on performance testing of web-based applications, API, microservices, and PEGA-based systems. This role is ideal for someone with strong hands-on experience in LoadRunner Enterprise (LRE) , including scripting with TrueClient and HTTP/HTML protocols , as well as a solid understanding of API and microservices performance testing. Responsibilities Design, develop, execute, and maintain performance test scripts using LoadRunner Enterprise (LRE) . Create, enhance, and maintain TrueClient and HTTP/HTML scripts for web-based applications. Conduct performance, load, stress, endurance, and scalability testing. Prepare performance test plans, workload models, test scenarios, and test reports. Analyze application and system performance bottlenecks. Provide recommendations for performance tuning and optimization. Perform API and microservices performance testing, including service virtualization where required. Monitor system performance using tools such as Dynatrace, AppDynamics, Splunk, Sysdig, Grafana , or similar. Collaborate with Development, QA, Infrastructure, and Business teams to identify and resolve performance issues. Support performance testing activities for applications built on the PEGA platform. Requirements Minimum 4+ years of hands-on experience in Performance Testing . Strong expertise in LoadRunner Enterprise (LRE) . Practical experience with TrueClient scripting . Strong experience with HTTP/HTML scripting . Good understanding of API and microservices architecture . Experience in performance testing of PEGA applications . Strong analytical, troubleshooting, and problem-solving skills. Good command of English. Nice to have Experience with monitoring tools such as Dynatrace, Sysdig, AppDynamics, Grafana, and Splunk . Experience with CI/CD integration for performance testing. SQL knowledge for backend validation. Good communication and stakeholder management skills. What we offer Opportunity to work on complex enterprise-level systems. Collaboration with experienced Development, QA, Infrastructure, and Business teams. Work with modern performance testing and monitoring tools. Project locations available in Gdańsk, Gdynia or Warsaw . International working environment with English as the main project language. Long-term cooperation.

🏢 Summary: Long-term B2B contract for an experienced Performance Tester focused on designing and executing performance tests for web applications, APIs, microservices, and PEGA-based systems using LoadRunner Enterprise. The role involves scripting, monitoring, bottleneck analysis, and performance optimization in enterprise-scale environments. Hybrid work model from Gdańsk, Gdynia, or Warsaw. 🗂️ Requirements: Minimum 4+ years of hands-on experience in Performance Testing, Strong expertise in LoadRunner Enterprise (LRE), Practical experience with TrueClient scripting, Strong experience with HTTP/HTML scripting, Understanding of API and microservices architecture, Experience in performance testing of PEGA applications, Ability to design and execute performance, load, stress, and scalability tests, Experience in analyzing performance bottlenecks, Good command of English 📃 Skills: LoadRunner, LRE, TrueClient, HTTP, HTML, API, Microservices, PEGA, Dynatrace, AppDynamics, Splunk, Sysdig, Grafana, CI/CD, SQL 🏢 Description: Location: Gdańsk, Gdynia or Warsaw, Poland Working model : hybrid 2-3 days per week from the preferred office Language: English Contract: B2B, long-term, 12+ months We are looking for an experienced Performance Tester / Performance Test Engineer to join a project focused on performance testing of web-based applications, API, microservices, and PEGA-based systems. This role is ideal for someone with strong hands-on experience in LoadRunner Enterprise (LRE) , including scripting with TrueClient and HTTP/HTML protocols , as well as a solid understanding of API and microservices performance testing. Responsibilities Design, develop, execute, and maintain performance test scripts using LoadRunner Enterprise (LRE) . Create, enhance, and maintain TrueClient and HTTP/HTML scripts for web-based applications. Conduct performance, load, stress, endurance, and scalability testing. Prepare performance test plans, workload models, test scenarios, and test reports. Analyze application and system performance bottlenecks. Provide recommendations for performance tuning and optimization. Perform API and microservices performance testing, including service virtualization where required. Monitor system performance using tools such as Dynatrace, AppDynamics, Splunk, Sysdig, Grafana , or similar. Collaborate with Development, QA, Infrastructure, and Business teams to identify and resolve performance issues. Support performance testing activities for applications built on the PEGA platform. Requirements Minimum 4+ years of hands-on experience in Performance Testing . Strong expertise in LoadRunner Enterprise (LRE) . Practical experience with TrueClient scripting . Strong experience with HTTP/HTML scripting . Good understanding of API and microservices architecture . Experience in performance testing of PEGA applications . Strong analytical, troubleshooting, and problem-solving skills. Good command of English. Nice to have Experience with monitoring tools such as Dynatrace, Sysdig, AppDynamics, Grafana, and Splunk . Experience with CI/CD integration for performance testing. SQL knowledge for backend validation. Good communication and stakeholder management skills. What we offer Opportunity to work on complex enterprise-level systems. Collaboration with experienced Development, QA, Infrastructure, and Business teams. Work with modern performance testing and monitoring tools. Project locations available in Gdańsk, Gdynia or Warsaw . International working environment with English as the main project language. Long-term cooperation.

🏢 Summary: Full-time B2B role for a Senior Backend Test Automation Engineer focused on testing backend microservices and distributed data platforms in a hybrid model from Krakow. The position involves integration testing, validating ETL and data processing workflows, and working with JVM-based backend services using Java or Scala. The project requires strong experience with CI/CD, automated testing, and debugging across distributed systems. 🗂️ Requirements: Strong experience testing backend microservices, Experience with integration testing across distributed systems, Experience with Play Framework or JVM-based backend services in Java/Scala, Good understanding of Apache Spark, Experience testing ETL and data processing workflows, Ability to manage test data and deterministic test environments, Experience with CI/CD and automated test execution, Ability to debug failures across services, databases, queues, and pipelines, English proficiency, Availability for hybrid work in Krakow 📃 Skills: Java, Scala, Play, Spark, SQL, ScalaTest, JUnit, Testcontainers, Docker, Kubernetes, GitHub, Jenkins, Azure, CI/CD, ETL 🏢 Description: Senior Backend Test Automation Engineer with strong data platform experience Industry: Technology solutions - consumer electronics, software, streaming Client: global enterprise, Swedish entity Work model: full time, hybrid 3 days/week on-site from Krakow (Equal Business Park) office Project language: English Onboarding : 3 days in Malmo, Sweden Start: ASAP or 1 week notice ideally / at latest start 27th July 2026 Assignment type: B2B Remuneration: up to 195 PLN/h net + VAT FTE: full-time Strong experience testing backend microservices rather than web UIs. Hands-on experience with integration testing across distributed systems. Experience with Play Framework (or at least JVM-based backend services in Java/Scala). Good understanding of Apache Spark and testing data pipelines. Experience validating ETL/data processing workflows. Comfortable managing test data, data dependencies, and deterministic test environments. Experience with CI/CD and automated test execution. Ability to debug failures across multiple services, databases, queues, and pipelines. Likely technical stack includes: Java and/or Scala Play Framework Apache Spark SQL Integration test frameworks (ScalaTest, JUnit, Testcontainers, etc.) Docker/Kubernetes GitHub Actions, Jenkins, Azure DevOps, or similar

🏢 Summary: Full-time B2B contract for a Senior Backend Test Automation Engineer focused on testing backend microservices, distributed systems, and data platforms in a hybrid model from Krakow. The role involves integration testing, ETL and data pipeline validation, CI/CD automation, and debugging across complex backend environments using Java/Scala technologies. Onboarding includes a short stay in Malmö, with an immediate or near-immediate start preferred. 🗂️ Requirements: Strong experience testing backend microservices, Hands-on experience with integration testing across distributed systems, Experience with Play Framework, Experience with JVM-based backend services, Understanding of Apache Spark, Experience testing data pipelines, Experience validating ETL workflows, Ability to manage test data and deterministic test environments, Experience with CI/CD and automated test execution, Ability to debug failures across services, databases, queues, and pipelines, English proficiency 📃 Skills: Java, Scala, Play, Spark, SQL, ScalaTest, JUnit, Testcontainers, Docker, Kubernetes, GitHub, Jenkins, Azure, CI/CD, ETL 🏢 Description: Senior Backend Test Automation Engineer with strong data platform experience Industry: Technology solutions - consumer electronics, software, streaming Client: global enterprise, Swedish entity Work model: full time, hybrid 3 days/week on-site from Krakow (Equal Business Park) office Project language: English Onboarding : 3 days in Malmo, Sweden Start: ASAP or 1 week notice ideally / at latest start 27th July 2026 Assignment type: B2B Remuneration: up to 195 PLN/h net + VAT FTE: full-time Strong experience testing backend microservices rather than web UIs. Hands-on experience with integration testing across distributed systems. Experience with Play Framework (or at least JVM-based backend services in Java/Scala). Good understanding of Apache Spark and testing data pipelines. Experience validating ETL/data processing workflows. Comfortable managing test data, data dependencies, and deterministic test environments. Experience with CI/CD and automated test execution. Ability to debug failures across multiple services, databases, queues, and pipelines. Likely technical stack includes: Java and/or Scala Play Framework Apache Spark SQL Integration test frameworks (ScalaTest, JUnit, Testcontainers, etc.) Docker/Kubernetes GitHub Actions, Jenkins, Azure DevOps, or similar