Senior Performance Test Engineer

🏢 Summary: Senior Performance Test Engineer role focused on ensuring high performance and scalability of a BigData analytical platform processing terabyte-to-petabyte scale data. The position involves designing complex performance test scenarios, optimizing infrastructure and application layers, and managing Kubernetes-based test environments. You will also develop CI/CD pipelines and drive AI-assisted, proactive performance engineering practices. 🗂️ Requirements: 5+ years of performance engineering experience, Experience designing complex performance test scenarios, Hands-on experience with JMeter, Locust or k6, Experience building and maintaining CI/CD pipelines, Proficiency in Python scripting, Experience with Kubernetes administration and debugging, Experience with observability tools, Experience with BigData workloads, Experience using AI tools for automation, Polish (native), English (proficient) 📃 Skills: JMeter, Locust, k6, Jenkins, Groovy, Python, Kubernetes, OKE, EKS, CI/CD, BigData, AI, Monitoring, Logging, Tracing 🏢 Description: DataWalk is a high-tech software product company that brings the next level of technology to the world through a patent-based hybrid graph analytical platform. Our system is used by US Departments, Intelligence Agencies, and top Fortune500 companies to combat money laundering, fraud, human trafficking, terrorism or organized crime. If you are interested in making the world a safer place and leverage a unique business opportunity, please read further. We are looking for an experienced Senior Performance Test Engineer to join our Product Engineering Team. As a Senior Performance Test Engineer at DataWalk, you will be ensuring our platform delivers optimal performance at massive scale for top Fortune500 companies and other major organizations processing hundreds of billions of objects and terabytes to petabytes of data. This role demands extraordinary analytical and technical expertise to proactively discover optimal system configurations, design and maintain complex performance test scenarios, tune infrastructure and application layers, and manage test environments on Kubernetes. You will maintain CI/CD pipelines powering our performance testing process and drive the adoption of AI-assisted scripting practices to elevate our testing productivity. We foster a culture of continuous growth, encouraging you to explore and implement new tools and practices, shifting the team's focus from reactive test execution to proactive performance optimization across the entire product. This is a chance to be a part of a company that's challenging the status quo in data analysis, offering a demanding but stimulating and rewarding environment for passionate performance engineering professionals. Responsibilities: Design, develop, and maintain complex performance test scenarios for a BigData platform processing hundreds of billions of objects at terabyte-to-petabyte scale. Analyze test results, identify bottlenecks, and recommend tuning strategies for infrastructure and application layers. Develop and maintain CI/CD pipelines for performance testing (Jenkins, Groovy). Drive performance enablement across the entire Product Engineering. Manage test environments on Kubernetes clusters (OKE, EKS). Document findings, provide recommendations, and communicate results to stakeholders. Requirements: Have 5+ years of experience in performance engineering (preferably in a product company). Have hands-on experience designing and maintaining complex performance test scenarios using tools such as JMeter, Locust, k6. Have experience building and maintaining CI/CD pipelines (Jenkins, Groovy). Are proficient in Python for performance test scripting. Have practical experience in utilizing AI tools to automate and accelerate your work. Have practical experience with Kubernetes (debugging, resource management). Have experience with observability tools (monitoring, logging, tracing). Worked with BigData workloads. Have strong analytical skills, ability to work independently, take initiative, and drive improvements proactively. Native in Polish, and proficient in English. We offer: Direct impact on the global expansion of the fast growing investigative analytics company with global ambitions. A competitive salary and an attractive package of benefits (private healthcare, life insurance, multisport cards, training). Growth opportunities in a dedicated and passionate team of professionals. A challenging and inspiring environment. Work remotely in a flexible, independent work environment.

🏢 Summary: Experienced Product Architect role focused on enterprise-scale graph analytics platforms, driving technical vision, architecture consistency, scalability, and cross-functional implementations. The position combines strategic leadership, hands-on development, performance optimization, deployment validation, and customer-facing technical support in a big data environment. 🗂️ Requirements: 8+ years of experience in enterprise system architecture, performance, and scalability, Experience leading complex cross-functional implementations, Strong analytical and graph theory problem-solving skills, Strong algorithmic thinking and coding ability, Experience troubleshooting system performance and scalability issues, Experience processing very large data volumes, Backend development experience in Java, Ability to design and document technical solutions, Fluent communication skills in Polish and English 📃 Skills: Java, Graph, Algorithms, Architecture, Scalability, Performance, Backend, BigData, Vertica, Analytics, Modeling, AI 🏢 Description: DataWalk is a high-tech software product company that brings the next level of technology to the world through a patent-based hybrid graph analytical platform. Our system is used by US Departments, Intelligence Agencies, and top Fortune500 companies to combat money laundering, fraud, human trafficking, terrorism or organized crime. If you are interested in making the world a safer place and leverage a unique business opportunity, please read further. We are looking for an experienced Product Architect to join our Product Engineering Team. The Product Architect is a critical role responsible for ensuring product consistency, technical vision realization, and architectural integrity across various functional areas. This role combines strategic technical leadership, consultancy for internal departments and customers, hands-on involvement in implementation and deployments, directly impacting system performance and scalability. Responsibilities: Cross-functional area Leadership Work closely with the Technical Architects to ensure cross-product features collaborate effectively with functional area specific features and constraints. Act as the Product consistency gatekeeper, primarily through Refinement Review and Consultancy. Lead cross-functional area Initiatives, including complex features and support tickets. Product Technical Vision and Performance Co-create the overall product technical vision and validate its implementation. Ensure that the architecture supports optimal scalability and performance. Deployment, System Performance, and Modeling Collect Platform/System non-functional requirements and feedback. Validate architecture decisions and deployment models through active involvement in product deployments. Engage in Firefighting to gain a "first-hand" perspective of system performance. Responsible for Hardware Sizing Creation and review for customer use cases. Actively promote and champion modeling patterns across teams. Product Implementation and Quality Participate directly in product implementation. Lead the technical kickoff of led features. Perform code review of critical elements. Sales Support Participate in sales processes. Requirements: Over 8 years of experience in enterprise-class system architecture, performance, and scalability. Capability of steering product technical vision and driving complex, cross-functional implementations. Analytical skills and the application of graph theory in problem-solving. Strong Algorithmic Thinking with ability to code. Customer Focus and Product-Driven mindset (experience outside of a typical software house environment is beneficial). Expertise in troubleshooting, starting from model verification and analysis of impact on system performance. Performance bottlenecks identification. Experience with big data volume processing (100bln+ records). Proficiency in Backend Coding, preferably in Java. Daily AI augmentation. Solution design and documentation. Excellent communication skills in Polish and English, with the ability to convey complex technical ideas clearly. Nice to have: Deep knowledge of Vertica (OpenText Analytics Database) or other analytics databases is a strong advantage. We offer: Direct impact on the global expansion of the fast growing investigative analytics company with global ambitions. A competitive compensation and access to professional development tools. Growth opportunities in a dedicated and passionate team of professionals. A challenging and inspiring environment. Work remotely in a flexible, independent work environment.

🏢 Summary: Senior Product Architect role focused on shaping and enforcing the technical vision, architecture consistency, and scalability of a hybrid graph analytics platform used for large-scale data processing. The position combines strategic cross-functional leadership with hands-on coding, performance optimization, and deployment validation. It directly impacts system performance, big data processing capabilities, and product quality in complex enterprise environments. 🗂️ Requirements: 8+ years in enterprise system architecture, performance and scalability, Experience driving technical vision and cross-functional implementations, Strong analytical skills and application of graph theory, Strong algorithmic thinking and coding ability, Experience with big data processing (100bln+ records), Backend development experience in Java, Expertise in troubleshooting and performance bottleneck identification, Experience in solution design and technical documentation, Fluency in Polish and English 📃 Skills: Java, Graph, Algorithms, BigData, Architecture, Scalability, Performance, Backend, Vertica, Databases, AI 🏢 Description: DataWalk is a high-tech software product company that brings the next level of technology to the world through a patent-based hybrid graph analytical platform. Our system is used by US Departments, Intelligence Agencies, and top Fortune500 companies to combat money laundering, fraud, human trafficking, terrorism or organized crime. If you are interested in making the world a safer place and leverage a unique business opportunity, please read further. We are looking for an experienced Product Architect to join our Product Engineering Team. The Product Architect is a critical role responsible for ensuring product consistency, technical vision realization, and architectural integrity across various functional areas. This role combines strategic technical leadership, consultancy for internal departments and customers, hands-on involvement in implementation and deployments, directly impacting system performance and scalability. Responsibilities: Cross-functional area Leadership Work closely with the Technical Architects to ensure cross-product features collaborate effectively with functional area specific features and constraints. Act as the Product consistency gatekeeper, primarily through Refinement Review and Consultancy. Lead cross-functional area Initiatives, including complex features and support tickets. Product Technical Vision and Performance Co-create the overall product technical vision and validate its implementation. Ensure that the architecture supports optimal scalability and performance. Deployment, System Performance, and Modeling Collect Platform/System non-functional requirements and feedback. Validate architecture decisions and deployment models through active involvement in product deployments. Engage in Firefighting to gain a "first-hand" perspective of system performance. Responsible for Hardware Sizing Creation and review for customer use cases. Actively promote and champion modeling patterns across teams. Product Implementation and Quality Participate directly in product implementation. Lead the technical kickoff of led features. Perform code review of critical elements. Sales Support Participate in sales processes. Requirements: Over 8 years of experience in enterprise-class system architecture, performance, and scalability. Capability of steering product technical vision and driving complex, cross-functional implementations. Analytical skills and the application of graph theory in problem-solving. Strong Algorithmic Thinking with ability to code. Customer Focus and Product-Driven mindset (experience outside of a typical software house environment is beneficial). Expertise in troubleshooting, starting from model verification and analysis of impact on system performance. Performance bottlenecks identification. Experience with big data volume processing (100bln+ records). Proficiency in Backend Coding, preferably in Java. Daily AI augmentation. Solution design and documentation. Excellent communication skills in Polish and English, with the ability to convey complex technical ideas clearly. Nice to have: Deep knowledge of Vertica (OpenText Analytics Database) or other analytics databases is a strong advantage. We offer: Direct impact on the global expansion of the fast growing investigative analytics company with global ambitions. A competitive compensation and access to professional development tools. Growth opportunities in a dedicated and passionate team of professionals. A challenging and inspiring environment. Work remotely in a flexible, independent work environment.

🏢 Summary: Senior Full-Stack Developer role focused on architecting, designing, and delivering high-performance Java-based solutions for a scalable analytical platform. The position involves building core components, improving performance and non-functional aspects, and supporting back-end engineering initiatives. The role requires hands-on development across both back-end and front-end technologies. 🗂️ Requirements: 7+ years of professional software development experience, Fluency in Java and Spring, Strong knowledge of SQL and SQL databases, Experience with TypeScript and Angular, Experience building RESTful web services, Familiarity with Redis, Familiarity with ActiveMQ Artemis (JMS), Experience with Docker 📃 Skills: Java, Spring, SQL, TypeScript, Angular, Redis, ActiveMQ, Artemis, Docker, REST, JMS 🏢 Description: DataWalk is a high-tech software product company that brings the next level of technology to the world through a patent-based hybrid graph analytical platform. Our system is used by US Departments, Intelligence Agencies, and top Fortune500 companies to combat money laundering, fraud, human trafficking, terrorism or organized crime. If you are interested in making the world a safer place and leverage a unique business opportunity, please read further. We are looking for an experienced Senior Full-Stack Developer to join our Product Engineering teams. The position will play a significant role in architecting, designing, developing, and delivering high-performance Java-based software solutions that underpin our platform's stability, scalability, and efficiency. Responsibilities: Design and implement core components of the DataWalk platform. Identify, recommend, design and implement non-functional and performance improvements. Evaluate new technologies and their application to the business. Work with team members to conduct root cause analysis of issues, review code and/or design proper testing mechanisms. Support back-end engineering efficiency initiatives. Requirements: 7+ years of professional experience, preferably in a product-focused company. Fluency in Java, Spring, and SQL. Experience with TypeScript and Angular. Strong knowledge of SQL databases (preferably columnar databases) and experience with RESTful web services. Familiarity with Redis, ActiveMQ Artemis (JMS), and Docker. B2 English proficiency (for effective communication). Demonstrated high level of ownership and initiative (high agency). Ability to manage multiple priorities in a fast-paced environment. Excellent communication and collaboration skills. Nice to have: Kubernetes and Kubernetes API. Knowledge of/experience in graph analytics. Experience in the area of back-end performance measurement, analysis and improvements. We offer: Work in a high tech company with Polish-American work culture and an excellent development perspective. Work on a product based on a unique technology. Growth opportunities in a passionate team of professionals. Challenging and inspiring environment. Friendly atmosphere and attractive package of benefits (private healthcare, life insurance, multisport cards, training).

🏢 Summary: Senior Full-Stack Developer role focused on building and optimizing a high-performance Java-based analytical platform used for large-scale data and graph analysis. The position involves designing core platform components, improving scalability and performance, and developing backend and frontend solutions in a product-focused environment. 🗂️ Requirements: 7+ years of professional experience, Java proficiency, Spring proficiency, SQL proficiency, TypeScript experience, Angular experience, Knowledge of SQL databases, Experience with RESTful web services, Familiarity with Redis, Familiarity with ActiveMQ Artemis, Familiarity with Docker, B2 English proficiency 📃 Skills: Java, Spring, SQL, TypeScript, Angular, Redis, ActiveMQ, Artemis, JMS, Docker, REST, Kubernetes 🏢 Description: DataWalk is the Data and Analytics Platform with an Enterprise Knowledge Graph. DataWalk turns fragmented data into an enterprise knowledge graph - enabling humans and AI to uncover hidden patterns and answer complex multi-hop questions at a population scale. Our system is used by US Departments, Intelligence Agencies, and top Fortune500 companies to combat money laundering, fraud, human trafficking, terrorism, or organized crime. If you are interested in making the world a safer place and leveraging a unique business opportunity, please read further. We are looking for an experienced Senior Full-Stack Developer to join our Product Engineering teams. The position will play a significant role in architecting, designing, developing, and delivering high-performance Java-based software solutions that underpin our platform's stability, scalability, and efficiency. Responsibilities: Design and implement core components of the DataWalk platform. Identify, recommend, design and implement non-functional and performance improvements. Evaluate new technologies and their application to the business. Work with team members to conduct root cause analysis of issues, review code and/or design proper testing mechanisms. Support back-end engineering efficiency initiatives. Requirements: 7+ years of professional experience, preferably in a product-focused company. Fluency in Java, Spring, and SQL. Experience with TypeScript and Angular. Strong knowledge of SQL databases (preferably columnar databases) and experience with RESTful web services. Familiarity with Redis, ActiveMQ Artemis (JMS), and Docker. B2 English proficiency (for effective communication). Demonstrated high level of ownership and initiative (high agency). Ability to manage multiple priorities in a fast-paced environment. Excellent communication and collaboration skills. Nice to have: Kubernetes and Kubernetes API. Knowledge of/experience in graph analytics. Experience in the area of back-end performance measurement, analysis and improvements. We offer: Work in a high tech company with Polish-American work culture and an excellent development perspective. Work on a product based on a unique technology. Growth opportunities in a passionate team of professionals. Challenging and inspiring environment. Friendly atmosphere and attractive package of benefits (private healthcare, life insurance, multisport cards, training).

🏢 Summary: Senior Full-Stack Developer role focused on architecting, building, and improving high-performance Java-based components for an enterprise data and analytics platform. The position combines back-end platform development with TypeScript/Angular work, performance optimization, technology evaluation, and production issue analysis. 🗂️ Requirements: 7+ years of professional software-development experience, Java, Spring, and SQL proficiency, TypeScript and Angular experience, Strong SQL database knowledge, RESTful web-services experience, Redis, ActiveMQ Artemis, and Docker familiarity, B2 English proficiency, High ownership and initiative, Ability to manage multiple priorities in a fast-paced environment, Strong communication and collaboration skills 📃 Skills: Java, Spring, SQL, TypeScript, Angular, Redis, ActiveMQ, Artemis, Docker, RESTful 🏢 Description: We are looking for an experienced Senior Full-Stack Developer to join Product Engineering teams. The position will play a significant role in architecting, designing, developing, and delivering high-performance Java-based software solutions that underpin the platform's stability, scalability, and efficiency. Responsibilities: - Design and implement core components of the platform. - Identify, recommend, design, and implement non-functional and performance improvements. - Evaluate new technologies and their application to the business. - Work with team members to conduct root-cause analysis of issues, review code, and design proper testing mechanisms. - Support back-end engineering efficiency initiatives. Requirements: - 7+ years of professional experience, preferably in a product-focused company. - Fluency in Java, Spring, and SQL. - Experience with TypeScript and Angular. - Strong knowledge of SQL databases, preferably columnar databases, and experience with RESTful web services. - Familiarity with Redis, ActiveMQ Artemis (JMS), and Docker. - B2 English proficiency for effective communication. - Demonstrated high level of ownership and initiative. - Ability to manage multiple priorities in a fast-paced environment. - Excellent communication and collaboration skills. Nice to have: - Kubernetes and Kubernetes API. - Knowledge of or experience in graph analytics. - Experience in back-end performance measurement, analysis, and improvements. We offer: - Work on a product based on unique technology. - Growth opportunities in a passionate team of professionals. - Challenging and inspiring environment. - Friendly atmosphere and an attractive benefits package, including private healthcare, life insurance, multisport cards, and training.

🏢 Summary: Senior Performance Test Engineer role focused on building and integrating performance testing practices for digital fleet management platforms in an Agile environment. The position involves designing automated performance test strategies, analyzing system scalability and reliability, and embedding performance testing into CI/CD pipelines. Hybrid work model based in Warsaw. 🗂️ Requirements: 5+ years of experience in performance engineering or testing, Experience with LoadRunner, Experience with Apache JMeter, Experience with Gatling, Knowledge of performance testing methodologies, Knowledge of workload modeling, Knowledge of capacity planning, Experience analyzing application logs and system metrics, Experience identifying performance bottlenecks, Experience with Dynatrace, Experience with Elasticsearch, Experience integrating performance testing into CI/CD pipelines, Fluent Polish, Fluent English 📃 Skills: LoadRunner, JMeter, Gatling, Dynatrace, Elasticsearch, Grafana, Prometheus, CI/CD, APM, Agile 🏢 Description: We are looking for an experienced Senior Performance Test Engineer to join a dynamic Agile team responsible for developing and supporting digital fleet management platforms used across multiple countries. In this role you will ensure the scalability, reliability, and efficiency of our digital platforms throughout the entire software delivery lifecycle. You will collaborate closely with Product Teams, Cloud Engineering, and QA communities to embed performance best practices into delivery teams and support the industrialization and standardization of performance testing across the organization. The role is based in Warsaw and offers a hybrid working model. Your tasks Designing and implementing performance testing strategies aligned with product architecture Integrating performance testing into CI/CD pipelines to enhance delivery efficiency Defining performance acceptance criteria and non-functional requirements (NFRs) Developing and maintaining automated load, stress, endurance, and scalability test scenarios Analyzing application and infrastructure behavior under load to identify performance bottlenecks Collaborating with engineering teams to improve system scalability, resilience, and overall performance Defining, measuring, and monitoring key performance indicators (KPIs), including latency, throughput, response times, and resource utilization Partnering with Operations and Site Reliability Engineering (SRE) teams to validate system stability and production readiness Developing reusable test assets, datasets, CI/CD pipelines, and automation templates Requirements Minimum 5 years of experience in performance engineering or testing Hands-on experience with performance testing tools such as LoadRunner, Apache JMeter, and Gatling Strong understanding of performance testing methodologies, workload modeling, and capacity planning Experience analyzing application logs, system metrics, and identifying performance bottlenecks Familiarity with application performance monitoring (APM) tools such as Dynatrace and Elasticsearch Experience integrating performance testing into CI/CD pipelines is a strong advantage Fluent Polish and English Nice-to-have requirements Familiarity with Grafana and Prometheus

🏢 Summary: Hybrid Senior Performance Test Engineer role focused on building automated performance testing frameworks and strategies for scalable, resilient digital products. The position uses JavaScript and k6 to test APIs, web applications, and distributed systems, embed testing in CI/CD, and drive performance improvements across engineering teams. 🗂️ Requirements: JavaScript (ES6+) proficiency, Automated test framework development experience, k6 performance testing experience, Load, stress, scalability testing and performance tuning knowledge, REST API and GraphQL API testing experience, CI/CD test integration experience, Git collaborative workflow experience, Docker and Kubernetes experience, Experience with AWS, Azure, or GCP, Observability and monitoring tool experience 📃 Skills: JavaScript, k6, REST, GraphQL, GitHubActions, GitLabCI, AzureDevOps, Jenkins, Git, Docker, Kubernetes, AWS, Azure, GCP, Grafana, Prometheus, ApplicationInsights 🏢 Description: About the Role We are looking for a Senior Performance Test Engineer to join our engineering team and help us build highly scalable, reliable, and resilient digital solutions. In this role, you will design and implement advanced performance testing strategies, develop automation frameworks, and work closely with engineering teams to identify bottlenecks and improve system performance. You will play a key role in embedding performance engineering practices into the software development lifecycle, enabling teams to deliver high-quality products that perform reliably at scale. This is an excellent opportunity for an experienced engineer who enjoys solving complex technical challenges, working with modern cloud technologies, and influencing engineering practices across distributed teams. Key Responsibilities - Design, develop, and maintain performance testing frameworks and automation solutions using JavaScript (ES6+). - Create and execute performance, load, stress, and scalability testing strategies for modern applications. - Develop and maintain performance test scenarios using k6. - Test and analyze the performance of REST APIs, GraphQL APIs, web applications, and distributed systems. - Identify performance bottlenecks and provide actionable recommendations for optimization. - Collaborate with developers, architects, DevOps, and product teams to improve system scalability and reliability. - Integrate performance testing into CI/CD pipelines and engineering workflows. - Support performance monitoring and analysis using observability platforms. - Contribute to performance engineering standards, best practices, and continuous improvement initiatives. - Work effectively with global, distributed engineering teams and communicate technical findings to both technical and non-technical stakeholders. Required Skills & Experience - Strong proficiency in JavaScript (ES6+). - Proven experience building automated test frameworks and reusable testing solutions. - Hands-on experience with k6 performance testing. - Strong understanding of performance engineering methodologies, including load testing, stress testing, scalability testing, and performance analysis and tuning. - Experience testing modern web applications and APIs, including REST APIs and GraphQL APIs. - Experience integrating automated tests into CI/CD pipelines using GitHub Actions, GitLab CI, Azure DevOps, or Jenkins. - Strong experience with Git and collaborative software development workflows. - Solid understanding of software engineering principles and modern development practices. - Excellent analytical and problem-solving skills. Cloud & Infrastructure Experience - Experience working with Docker and containerized environments. - Experience working with Kubernetes and cloud-native architectures. - Experience with at least one major cloud platform: AWS, Microsoft Azure, or Google Cloud Platform (GCP). - Experience with observability and monitoring tools such as Grafana, Prometheus, Application Insights, or similar monitoring and analytics platforms. Soft Skills & Mindset - Strong communication and stakeholder management skills. - Ability to influence technical decisions and drive improvements without direct authority. - Passion for quality engineering, automation, and developer enablement. - Continuous learning mindset and curiosity about emerging technologies. - Ability to collaborate effectively across international and distributed teams. - Comfortable working independently while contributing to a highly collaborative engineering culture.

🏢 Summary: Senior QA Automation & Performance Test Engineer role focused on designing, developing, and executing automated and performance test solutions to ensure quality, scalability, and reliability of complex software systems. The position involves owning non-functional testing activities, building automation frameworks, and optimizing application performance across web, microservices, and cloud environments. The role requires strong programming expertise and hands-on experience with enterprise-grade testing and monitoring tools. 🗂️ Requirements: Strong proficiency in Java, Strong proficiency in C, Experience with LoadRunner Enterprise, Experience with Selenium or Cucumber, Hands-on experience in automation testing across web, microservices, databases, and cloud applications, Experience with CI/CD pipelines, Experience building performance and load testing frameworks, Experience with logging and APM tools, Knowledge of Linux performance tuning, Knowledge of database optimisation techniques, Experience with WebSphere, Experience with Tomcat, Ability to analyse logs and database queries, Experience managing test and defect lifecycle in Agile and Waterfall 📃 Skills: Java, C, LoadRunner, Selenium, Cucumber, Gatling, Locust, AppDynamics, AppInsights, Splunk, Linux, SQL, WebSphere, Tomcat, CI/CD 🏢 Description: We are seeking a highly skilled Senior QA Automation & Performance Test Engineer to join our dynamic team. The ideal candidate will be responsible for designing, developing, maintaining, and executing automated and performance test scripts to ensure the quality, reliability, and scalability of our software products. This role requires a strong background in software development, test automation frameworks, performance testing, and a passion for delivering high-quality solutions. This position offers a flex-hybrid model of work, with 3 days per week working from the office located in Wroclaw or Krakow. Responsibilities Collaborate with cross-functional teams to understand software requirements and develop comprehensive test plans, cases, and scenarios Design, develop, and maintain automated and performance test scripts using industry-standard tools and frameworks Own and manage all non-functional testing activities, including performance, stress, load, and regression testing Continuously research and evaluate new testing technologies, tools, and methodologies to improve efficiency and effectiveness Advocate for best practices in testing and quality assurance, contributing to process improvement Develop custom tools and integrate with existing tools to increase engineering productivity Ensure quality, security, reliability, and compliance by testing both functional and non-functional requirements Coordinate test activities within the pod and across other test managers as required Enable and drive a culture of 'automation-first' in the QA space Perform in-sprint automation testing and build regression test suites Analyse errors using logs, database queries, legacy and Unix file systems, etc Expertly manage the complete test and defect lifecycle across agile and waterfall methodologies Generate test reports and share status across multiple levels Capacity planning and management of web, microservices, and mobile applications Performance monitoring and tuning of applications using tools like AppDynamics, AppInsights, Splunk Use quantitative methods to identify performance and throughput bottlenecks Work on large-scale migration projects for financial institutions’ core platforms Requirements Strong proficiency in programming languages such as Java and C Strong experience in LoadRunner Enterprise (2023 or earlier) Experience with test automation frameworks such as Selenium, Cucumber, or similar BDD frameworks Hands-on experience with automation testing for desktop, web, data services, microservices, database, ETL, cloud-based applications, middleware, and OS Experience with CI/CD pipelines Expertise in building frameworks for performance and load tests using tools like Gatling, Locust, LoadRunner Experience with logging and APM tools (AppDynamics, AppInsights, Splunk) Good understanding of Linux performance tuning and database optimisation techniques Experience with WebSphere and Tomcat application servers Strong analytical skills, proactive, detail-oriented, and comfortable working in dynamic, fast-paced environments Excellent communicator with strong written and verbal English skills We offer/Benefits We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.

🏢 Summary: Senior Python Software Engineer role focused on building and operating production-grade Python applications and data pipelines, transforming data science prototypes into scalable, deployable services. The position emphasizes strong SDLC practices, API development, governed data environments and collaboration with platform teams using Databricks and Spark. It combines backend engineering, data processing and model service exposure in enterprise production environments. 🗂️ Requirements: 3+ years of Python engineering experience, Proficiency in Python packaging (wheels, pyproject), Experience with typing, clean architecture and error handling, Strong production SDLC experience (Git workflows, automated tests, CI/CD, code reviews), Strong skills in Pandas and NumPy, Experience with Parquet and governed data access patterns, Experience building APIs with FastAPI, Flask or similar frameworks, Experience working in Databricks or other governed platform environments 📃 Skills: Python, Pandas, NumPy, Parquet, FastAPI, Flask, Databricks, Spark, PySpark, Git, CI/CD, scikit-learn 🏢 Description: We are seeking a Senior Python Software Engineer (Production Data & Model Services) to design, build and operate production-grade Python applications and data pipelines. In this role, you will transform quantitative and data science prototypes into robust, deployable services while collaborating closely with platform teams to ensure scalable and well-governed solutions. Responsibilities Build and run production-grade Python applications including APIs and batch jobs with strong SDLC practices covering code reviews, testing, CI/CD, observability and documentation Develop robust batch and near-real-time data pipelines reading and writing governed storage with Parquet and columnar formats following approved patterns Transform quant and data science prototypes into deployable packages and services that are typed, modular and versioned Expose scoring and analytics capabilities via APIs or scheduled jobs rather than notebook-only deliverables Collaborate with platform teams on Databricks and Spark connectivity Optimize PySpark workloads when needed to ensure performance and scalability Maintain release discipline through Git workflows, automated tests and code reviews Operate within governed platform environments to ensure compliance and reliability Requirements 3+ years of experience in Python engineering with proficiency in packaging (wheels/pyproject), typing, clean architecture, error handling and performance mindset Proven background in production SDLC including Git workflows, automated tests, CI/CD, code reviews and release discipline Strong skills in Pandas and NumPy applied to production pipelines Familiarity with data formats such as Parquet and governed data access patterns Experience building and operating APIs and services using FastAPI, Flask or similar frameworks Competency in working within governed platform environments such as Databricks or containerized dev platforms Nice to have Skills in scikit-learn for production feature and scoring pipelines, including reproducible transforms and model packaging/versioning Background in PySpark and distributed processing Familiarity with IDE-to-Databricks workflows such as Databricks Connect We offer We gather like-minded people: Top tech minds driving innovation in AI, cloud and digital platform modernization Supportive team and agile, startup-like culture Hybrid by design mode and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Career development programs Thought leadership, mentoring, soft skills and well-being programs Certification (Anthropic, Gemini, GCP, Azure, AWS) English classes We cover it all: Stable pay Participation in the Employee Stock Purchase Plan with a 15% discount Benefits package (health insurance, multisport, shopping vouchers) Referral bonuses up to $2,000 Offices featuring entertainment and relaxation zones, table tennis and football, free snacks, coffee and more Corporate, social and well-being events Please, note: Benefits listed above are available to employees only We are open for working with Contractors. Terms of B2B cooperation agreements are agreed individually We will reach out to selected candidates exclusively EPAM is global leader in AI transformation engineering and integrated consulting, serving Forbes Global 2000 companies and ambitious startups. With over thirty years of expertise in custom software, product and platform engineering, we empower our clients to become AI-Native enterprises, driving measurable value from innovation and digital investments.