Manual Tester (f/m/x)

🏢 Summary: Senior QA Tester role focused on designing and executing integration and contract tests for web and mobile applications. The position involves API and database testing, defect reporting, documentation, and close collaboration with developers in an Agile environment. Candidates must have strong experience in test design, bug tracking tools, and fluency in English and Polish while residing in Poland. 🗂️ Requirements: Minimum 5 years of experience testing web and mobile applications, Experience creating test cases and test scenarios, Experience with integration and contract testing, Experience with API testing using Postman or Swagger, Knowledge of SQL databases, Experience with bug tracking tools: Jira, TestRail, qTest, Zephyr, or Azure DevOps, Experience working in Agile methodology, Fluency in English (B2+), Fluency in Polish (B2+), Residence in Poland 📃 Skills: Testing, API, SQL, Postman, Swagger, Jira, TestRail, qTest, Zephyr, AzureDevOps, Agile, WCAG, ETL 🏢 Description: Join our Team – the largest Testing Services Center in Poland, created by testers for testers, in a company routinely awarded with Great Place to Work awards. We help our employees identify, use, and grow their strengths by providing interesting projects and constant access to knowledge through our own training platform, webinars, a unique mentoring program, and experience exchange within our Community. Your tasks Creating test cases and test scenarios Planning and executing integration, contract testing Reporting all encountered problems and errors Preparing test reports, creating documentation Ensuring all tests maintain the highest quality Working with developers to understand the critical paths and ensure product stability Requirements At least 5 years of experience with testing web and mobile applications Knowledge of common test design techniques Previous work with API testing (Postman, Swagger) and SQL databases Familiarity with one of the following bug tracking systems: Jira, TestRail, qTest, Zephyr, Azure DevOps Experience of working in Agile methodology Openness, good communication, attention to detail, and the ability to work in a team Fluency in English and Polish (at least B2) Residing in Poland required Nice-to-have requirements ISTQB certificate Experience with WCAG or ETL/Data testing German fluency Preferred candidates from Białystok What we offer Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022 Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more Comfortable workplace – class A offices or remote work Dozens of fascinating projects for prestigious brands from all over the world PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers Investment in your growth – meetups, webinars, training platform and technology blog – you choose Fantastic atmosphere created by all Sii Power People If you want to work on systems with high operational significance — apply now!

🏢 Summary: Senior QA Automation role focused on architecting and implementing automated testing solutions using Playwright, while supporting manual testing activities. The position includes leading code reviews, establishing best practices for a new testing framework, and mentoring an internal team. The role requires hybrid work with presence in the client’s office three times a week. 🗂️ Requirements: Minimum 4 years of professional experience in software testing, Strong experience in architecting automated testing environments, Hands-on experience with Playwright testing framework, Experience in testing mobile and web applications, Ability to conduct code reviews and guide best practices, Willingness to support manual testing activities, Experience in onboarding and upskilling team members in new frameworks, Advanced proficiency in English, Advanced proficiency in Polish 📃 Skills: Playwright, Automation, Testing, QA, Mobile, Web, CodeReview 🏢 Description: Join our Team – the largest Testing Services Center in Poland, created by testers for testers, in a company routinely awarded with Great Place to Work awards. We help our employees identify, use, and grow their strengths by providing interesting projects and constant access to knowledge through our own training platform, webinars, a unique mentoring program, and experience exchange within our Community. The role requires working in the client’s office 3 times a week. Your tasks Providing hands-on automation and code reviews for the internal team Guiding the team through best practices for the newly selected framework Assisting with manual testing of new features Reviewing QA scope and testing estimates Requirements At least 5 years of professional experience in writing automated tests in Python Deep experience architecting automated testing environments (must-have testing framework: Playwright) Strong automation background with a willingness to support manual testing Expertise in testing both mobile and web applications Proven ability to onboard and upskill an internal team in a new framework Advanced English and Polish language proficiency What we offer Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022 Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more Comfortable workplace – class A offices or remote work Dozens of fascinating projects for prestigious brands from all over the world PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers Investment in your growth – meetups, webinars, training platform and technology blog – you choose Fantastic atmosphere created by all Sii Power People If you want to work on systems with high operational significance — apply now!

🏢 Summary: Manual Tester role focused on testing web and mobile applications in the banking sector, with a hybrid work model requiring on-site presence 1–2 times per week. The position involves designing and executing integration and contract tests, reporting defects, and ensuring high product quality in Agile teams. Candidates must have solid experience in manual testing and familiarity with common testing and bug-tracking tools. 🗂️ Requirements: Minimum 3 years of experience in testing web and/or mobile applications, Knowledge of test design techniques, Experience with bug tracking systems (e.g. Jira, TestRail), Experience working in Agile methodology, Advanced Polish and English language skills, Residence in Poland, Ability to work on-site 1–2 times per week 📃 Skills: Jira, TestRail, Agile, Postman, Swagger, SQL, Zephyr, Ferryt 🏢 Description: Join our Team – the largest Testing Services Center in Poland, created by testers for testers, in a company routinely awarded with Great Place to Work awards. We help our employees identify, use, and grow their strengths by providing interesting projects and constant access to knowledge through our own training platform, webinars, a unique mentoring program, and experience exchange within our Community. We are looking for Manual Testers with experience in testing web and/or mobile applications in the banking environment. The role requires working in the client’s office 1-2 times a week. Your tasks Creating test cases and test scenarios Planning and executing integration, contract testing Reporting all encountered problems and errors Preparing test reports, creating documentation Ensuring all tests maintain the highest quality Working with developers to understand the critical paths and ensure product stability Requirements At least 2 years of experience with testing web and/or mobile applications Knowledge of common test design techniques Familiarity with bug tracking systems such as Jira, TestRail Experience of working in Agile methodology Openness, good communication, attention to detail, and the ability to work in a team Advanced knowledge of Polish and English Residing in Poland required Nice-to-have requirements Experience with API testing (Postman, Swagger) and SQL databases Familiarity with Zephyr or Ferryt Ability to use AI tools within the testing process What we offer Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022 Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more Comfortable workplace – class A offices or remote work Dozens of fascinating projects for prestigious brands from all over the world PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers Investment in your growth – meetups, webinars, training platform and technology blog – you choose Fantastic atmosphere created by all Sii Power People If you want to work on systems with high operational significance — apply now!

🏢 Summary: Oferta dotyczy roli Testera Oprogramowania odpowiedzialnego za analizę, projektowanie i realizację testów, ze szczególnym uwzględnieniem testów API, backendu oraz procesów kart płatniczych. Osoba na tym stanowisku będzie tworzyć plany testów, raportować błędy oraz dbać o wysoką jakość dostarczanego oprogramowania. Rola wymaga doświadczenia w pracy z SQL oraz znajomości standardów ISTQB. 🗂️ Requirements: Minimum 3 lata doświadczenia w testowaniu oprogramowania, Znajomość SQL umożliwiająca analizę danych i pisanie zapytań, Doświadczenie w testowaniu API, Doświadczenie w testowaniu backendu, Doświadczenie w testowaniu procesów kart płatniczych (Visa, Mastercard), Znajomość koncepcji ISTQB Foundation Level, Znajomość języka angielskiego umożliwiająca swobodną komunikację, Umiejętność tworzenia scenariuszy i przypadków testowych oraz dokumentacji technicznej, Przebywanie na terenie Polski, Płynna znajomość języka polskiego 📃 Skills: SQL, API, Backend, ISTQB, Visa, Mastercard 🏢 Description: Dołącz do naszego Zespołu – największego Centrum Usług Testowych w Polsce, stworzonego przez testerów dla testerów, w firmie rutynowo nagradzanej nagrodami Great Place to Work. Pomagamy naszym pracownikom identyfikować, wykorzystywać i rozwijać ich mocne strony, zapewniając ciekawe projekty i stały dostęp do wiedzy poprzez własną platformę szkoleniową, webinary, unikalny program mentoringowy oraz wymianę doświadczeń w ramach naszej Społeczności. Twoje zadania Analiza i projektowanie przypadków testowych Wykonywanie scenariuszy testowych Zapewnianie najlepszej jakości testów Tworzenie planu testów, koordynacja i realizacja testów Raportowanie wszystkich znalezionych problemów i błędów Przygotowanie raportów z testów Wymagania Minimum 3 lata doświadczenia w testowaniu oprogramowania Znajomość języka SQL na poziomie umożliwiającym analizę danych i pisanie zapytań Wcześniejsza praca w testowaniu API oraz backendu Doświadczenie w testowaniu procesów związanych z kartami płatniczymi np. Visa, Mastercard Wiedza na temat podstawowych koncepcji ISTQB Foundation Level Znajomość języka angielskiego (w mowie i piśmie) na poziomie umożliwiającym swobodną komunikację Umiejętność tworzenia scenariuszy i przypadków testowych oraz dokumentacji technicznej Wymagane przebywanie na terenie Polski oraz płynna znajomość języka polskiego Benefity, które czekają na Ciebie: Tytuł Great Place to Work od 2015 roku - to dzięki opiniom pracowników otrzymujemy tytuł i wdrażamy nowe pomysły Stabilność zatrudnienia - 2,1 MLD PLN przychodu, brak długów, od 2006 roku na rynku Dzielimy się zyskiem z pracownikami - od 2022 roku przeznaczyliśmy na ten cel już ponad 76 milionów PLN Bogaty pakiet benefitów - prywatna opieka zdrowotna, platforma kafeteryjna, zniżki na samochody i więcej Komfortowe miejsce pracy - pracuj w naszych biurach klasy A lub zdalnie Dziesiątki fascynujących projektów dla prestiżowych marek z całego świata 1 000 000 PLN rocznie na Twoje pomysły - taką kwotą wspieramy pasje i akcje wolontariackie naszych pracowników Stawiamy na Twój rozwój - meetupy, webinary, platforma szkoleniowa i blog technologiczny – Ty wybierasz Fantastyczna atmosfera stworzona przez wszystkich Sii Power People Dołącz do zespołu Sii – rozwijaj umiejętności, zdobywaj doświadczenie i buduj karierę!

🏢 Summary: Offer for a Test Automation Engineer to work on a large, modular banking system supporting payments, workflows, and document management. The role focuses on automated testing of client-facing and internal banking applications, including backend components and administrative modules. Work is project-based within a cross-functional team, contributing to high-impact financial systems. 🗂️ Requirements: Minimum 3 years of experience in test automation using Java, Hands-on experience with Selenium or Selenide, Experience with Cucumber, Experience with Rest Assured, Experience with Git, Experience with Jenkins, Fluent Polish, Fluent English, Availability for hybrid work (3 days per week in Kraków office), Residence in Poland 📃 Skills: Java, Selenium, Selenide, Cucumber, RestAssured, Git, Jenkins 🏢 Description: We are looking for a person who will work with us on a modern application for managing processes and exchanging documents between a bank and its clients. What do we do? We are developing a large, modular system in which each module has its own unique responsibilities — from handling payment processes and document exchange with clients, through advanced internal applications with schedules and checklists, to the administration and customization of business processes. Your tasks Testing a client-facing application responsible for payments, workflows, and document management Working with internal banking systems, including workflow modules, calendars, and administrative panels Verifying administrator dashboards, including backend components of modules and calendars Working in a task-oriented, project-based mode (code reviews, collaborative problem-solving) Collaborating closely within a cross-functional team, including Tech Lead, 2 Business Analysts, a Scrum Master, 5 Testers, as well as 6 Backend and 6 Frontend Developers Requirements At least 3 years of experience in test automation using Java Fluent proficiency in both Polish and English Experience and willingness to grow in technologies such as Java, Selenium (Selenide), Cucumber, Rest Assured, Git, and Jenkins Availability for hybrid work — 3 days per week in the office in Kraków Residing in Poland required Additional benefits Variety of responsibilities — you can be involved in frontend, backend, and integrations with external systems Large-scale projects that are well structured into modules making it easy to onboard and navigate the work Opportunity to introduce test automation and new technologies, e.g. migrating from Selenium to Playwright A real impact on improving customer service and optimizing business processes What we offer Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022 Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more Comfortable workplace – class A offices or remote work Dozens of fascinating projects for prestigious brands from all over the world PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers Investment in your growth – meetups, webinars, training platform and technology blog – you choose Fantastic atmosphere created by all Sii Power People If you want to work on systems with high operational significance — apply now!

🏢 Summary: The role involves automated testing of a modern, modular banking application supporting payments, workflows, and document management for client-facing and internal systems. The position focuses on developing and maintaining test automation frameworks while collaborating within a cross-functional Scrum team. It offers work on large-scale, high-impact systems with opportunities to introduce new automation technologies. 🗂️ Requirements: Minimum 3 years of experience in test automation using Java, Experience with Selenium or Selenide, Experience with Cucumber, Experience with Rest Assured, Experience with Git, Experience with Jenkins, Fluent Polish and English, Availability for hybrid work (3 days per week in Kraków office), Residence in Poland 📃 Skills: Java, Selenium, Selenide, Cucumber, RestAssured, Git, Jenkins 🏢 Description: We are looking for a person who will work with us on a modern application for managing processes and exchanging documents between a bank and its clients. What do we do? We are developing a large, modular system in which each module has its own unique responsibilities — from handling payment processes and document exchange with clients, through advanced internal applications with schedules and checklists, to the administration and customization of business processes. Your tasks Testing a client-facing application responsible for payments, workflows, and document management Working with internal banking systems, including workflow modules, calendars, and administrative panels Verifying administrator dashboards, including backend components of modules and calendars Working in a task-oriented, project-based mode (code reviews, collaborative problem-solving) Collaborating closely within a cross-functional team, including Tech Lead, 2 Business Analysts, a Scrum Master, 5 Testers, as well as 6 Backend and 6 Frontend Developers Requirements At least 3 years of experience in test automation using Java Fluent proficiency in both Polish and English Experience and willingness to grow in technologies such as Java, Selenium (Selenide), Cucumber, Rest Assured, Git, and Jenkins Availability for hybrid work — 3 days per week in the office in Kraków Residing in Poland required Additional benefits Variety of responsibilities — you can be involved in frontend, backend, and integrations with external systems Large-scale projects that are well structured into modules making it easy to onboard and navigate the work Opportunity to introduce test automation and new technologies, e.g. migrating from Selenium to Playwright A real impact on improving customer service and optimizing business processes What we offer Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022 Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more Comfortable workplace – class A offices or remote work Dozens of fascinating projects for prestigious brands from all over the world PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers Investment in your growth – meetups, webinars, training platform and technology blog – you choose Fantastic atmosphere created by all Sii Power People If you want to work on systems with high operational significance — apply now!

🏢 Summary: Backend engineering role focused on building and maintaining Kotlin-based microservices for a modern fintech expense management platform. The position involves developing scalable financial integrations with banks, accounting, and HR systems while ensuring high reliability and performance. You will contribute to architecture improvements, code quality, and system observability in a cloud environment. 🗂️ Requirements: Minimum 3 years of software development experience, Commercial experience with Kotlin, Experience building backend systems, Experience with microservices architecture, Basic experience with AWS or Kubernetes, Experience with PostgreSQL, Experience with testing and observability tools, Good command of English, Residence in Poland 📃 Skills: Kotlin, Microservices, Backend, AWS, Kubernetes, PostgreSQL, JUnit, Grafana, Cloud 🏢 Description: Join a team working on a modern fintech platform that supports company expense management. The project focuses on developing a finance solution that enables seamless integration of financial tools (including payment cards, expense management, and invoice handling) directly into partner systems such as banks, accounting platforms, and HR solutions. The product allows companies to simplify financial processes, automate settlements, and gain full real-time control over their spending. Your tasks Designing, building, and maintaining microservices using Kotlin Collaborating with cross-functional teams to deliver solutions across Platform, Services, SMB, and other domains Supporting system performance monitoring and contributing to improvements in reliability and scalability Participating in code reviews and maintaining high code quality standards Contributing to the continuous improvement of code quality and system architecture Troubleshooting and resolving technical issues Requirements Minimum 3 years of professional experience in software development Hands-on experience with Kotlin in commercial projects Experience building backend systems and working with microservices architecture Basic experience with cloud environments (e.g., AWS, Kubernetes) Experience with relational databases (e.g., PostgreSQL) as well as testing and observability tools (e.g., JUnit, Grafana) Good command of English Residing in Poland required What we offer Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022 Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more Comfortable workplace – class A offices or remote work Dozens of fascinating projects for prestigious brands from all over the world PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers Investment in your growth – meetups, webinars, training platform and technology blog – you choose Fantastic atmosphere created by all Sii Power People If you want to work on systems with high operational significance — apply now!

🏢 Summary: The role focuses on designing and implementing automated testing frameworks to validate programmable Ethernet switch software and firmware. It involves functional, performance, regression, and system-level testing of L2/L3 networking devices, with integration into CI/CD pipelines. The position centers on ensuring reliability of embedded networking solutions through Python-based automation. 🗂️ Requirements: Minimum 5 years of commercial experience in test automation, Strong experience in Python-based test automation, Experience with networking automation frameworks, Familiarity with Linux environments, Hands-on experience testing L2/L3 switches and routers, Experience with CI/CD tools, Ability to perform regression, stress, and system-level testing, Residing in Poland 📃 Skills: Python, Linux, CI/CD, Jenkins, GitLab, Ethernet, L2, L3, Switching, Routing, Docker, Ansible, Vagrant, C, C++, IxNetwork, Spirent, TRex 🏢 Description: Join our test and validation team to ensure the reliability and performance of programmable Ethernet switch software. You’ll design and implement automation frameworks and networking test scenarios to validate cutting-edge hardware and software solutions. By joining us, you become a member of the Embedded Competence Center at Sii is an internal organizational unit, bringing together more than 500 specialists nationwide! We are currently working on about 100 projects for 50 clients from various industries including automotive, IoT, telecommunications and medical. Your tasks Design and implement automated test suites for switch software and firmware Develop Python-based testing frameworks for functional and performance testing Perform regression, stress, and system-level testing on hardware platforms Integrate automated tests into CI/CD pipelines Work with developers to identify, reproduce, and verify fixes for software defects Requirements Minimum 5 years of commercial experience in a similar position Strong experience in Python-based test automation Familiarity with networking automation frameworks and Linux environments Hands-on experience testing physical and virtual L2/L3 switches and routers Experience with CI/CD tools (Jenkins, GitLab, etc.) Self-driven, analytical, and excellent team collaboration Good knowledge of spoken and written English (everyday communication) Residing in Poland required Nice to have Knowledge of C/C++ Experience with Docker, Ansible, or Vagrant Familiarity with traffic generators (IxNetwork, Spirent, TRex) What we offer Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022 Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more Comfortable workplace – class A offices or remote work Dozens of fascinating projects for prestigious brands from all over the world PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers Investment in your growth – meetups, webinars, training platform and technology blog – you choose Fantastic atmosphere created by all Sii Power People If you want to work on systems with high operational significance — apply now!

🏢 Summary: Role focused on designing and implementing automated test frameworks to validate programmable Ethernet switch software and firmware. The position involves functional, performance, regression, and system-level testing of L2/L3 hardware and virtual platforms, with integration into CI/CD pipelines. You will collaborate closely with developers to ensure reliability and performance of networking solutions. 🗂️ Requirements: Minimum 5 years of commercial experience in test automation, Strong experience in Python-based test automation, Experience with networking automation frameworks, Familiarity with Linux environments, Hands-on experience testing L2/L3 switches and routers, Experience with CI/CD tools such as Jenkins or GitLab 📃 Skills: Python, Linux, Ethernet, L2, L3, CI/CD, Jenkins, GitLab, Networking, Automation, Firmware 🏢 Description: Join our test and validation team to ensure the reliability and performance of programmable Ethernet switch software. You’ll design and implement automation frameworks and networking test scenarios to validate cutting-edge hardware and software solutions. By joining us, you become a member of the Embedded Competence Center at Sii is an internal organizational unit, bringing together more than 500 specialists nationwide! We are currently working on about 100 projects for 50 clients from various industries including automotive, IoT, telecommunications and medical. Your tasks Design and implement automated test suites for switch software and firmware Develop Python-based testing frameworks for functional and performance testing Perform regression, stress, and system-level testing on hardware platforms Integrate automated tests into CI/CD pipelines Work with developers to identify, reproduce, and verify fixes for software defects Requirements Minimum 5 years of commercial experience in a similar position Strong experience in Python-based test automation Familiarity with networking automation frameworks and Linux environments Hands-on experience testing physical and virtual L2/L3 switches and routers Experience with CI/CD tools (Jenkins, GitLab, etc.) Self-driven, analytical, and excellent team collaboration Good knowledge of spoken and written English (everyday communication) Residing in Poland required Nice to have Knowledge of C/C++ Experience with Docker, Ansible, or Vagrant Familiarity with traffic generators (IxNetwork, Spirent, TRex) What we offer Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022 Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more Comfortable workplace – class A offices or remote work Dozens of fascinating projects for prestigious brands from all over the world PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers Investment in your growth – meetups, webinars, training platform and technology blog – you choose Fantastic atmosphere created by all Sii Power People If you want to work on systems with high operational significance — apply now!

🏢 Summary: Senior Frontend Engineer role focused on building and scaling a modern fintech platform for managing corporate spending. The position involves leading development of React and TypeScript-based SPA applications, integrating with microservices and APIs, and driving performance and architectural improvements. You will collaborate cross-functionally while mentoring engineers and shaping scalable front-end solutions in a cloud-native environment. 🗂️ Requirements: 5+ years professional software engineering experience, Strong commercial experience with React, Strong expertise in TypeScript, Advanced knowledge of modern JavaScript (ES6+), Experience building large-scale SPA applications, Experience designing scalable front-end architectures, Experience working with APIs and microservices-based systems, Hands-on experience with front-end testing (unit, integration, e2e), Experience with CI/CD pipelines, Experience with AWS, Experience with Kubernetes, Professional English proficiency (min. B2), Fluent Polish, Residence in Poland 📃 Skills: React, TypeScript, JavaScript, ES6, SPA, REST, GraphQL, Microservices, CI/CD, AWS, Kubernetes, Testing, SSR 🏢 Description: Join a team building a modern fintech platform that helps businesses manage company spending more efficiently. The project focuses on developing a financial product that enables seamless integration of financial tools—including corporate cards, expense management, and invoice processing—directly with partner ecosystems such as banks, accounting platforms, and HR systems. The platform empowers companies to automate financial operations, simplify reconciliation processes, and gain full real-time visibility into their spending. Your tasks Lead initiatives focused on designing, building, and maintaining scalable front-end applications primarily using React and TypeScript Build modern, performant, and intuitive user interfaces for key areas of the fintech platform Collaborate closely with cross-functional teams across backend engineering, product, and design to deliver scalable product solutions Integrate front-end applications with microservices-based architectures and APIs (REST / GraphQL) Analyze application performance and implement optimizations to ensure high responsiveness, reliability, and scalability Participate in code reviews, architecture discussions, and post-mortems while mentoring other engineers Proactively address technical debt and guide the team through technical challenges, refactoring initiatives, and architectural migrations Requirements At least 5 years of professional software engineering experience, including strong commercial experience with React Strong expertise in TypeScript, modern JavaScript (ES6+), and building large-scale SPA applications Solid experience designing scalable front-end architectures using component-based and modular design principles Experience working with APIs and distributed systems in microservices-based environments Hands-on experience with front-end testing frameworks (unit, integration, e2e) and observability/monitoring tools Previous work with CI/CD pipelines, cloud environments such as AWS, and container orchestration platforms like Kubernetes Strong problem-solving skills, ownership mindset, and passion for mentoring and elevating engineering teams Professional English proficiency - minimum B2 Fluent in Polish required Residing in Poland required Nice-to-have requirements Previous experience in fintech or building financial products Understanding of payments, cards, expense management, or accounting-related domains Experience working in a scale-up environment Experience with GraphQL, SSR, performance optimization, or building design systems What we offer Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022 Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more Comfortable workplace – class A offices or remote work Dozens of fascinating projects for prestigious brands from all over the world PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers Investment in your growth – meetups, webinars, training platform and technology blog – you choose Fantastic atmosphere created by all Sii Power People If you want to work on systems with high operational significance — apply now!