.NET Core Developer

🏢 Summary: B2B role to design and build high-scale infrastructure and platform solutions in .NET 8 for a global travel-tech product used by millions of users. The position focuses on developing a new architecture and delivering end-to-end solutions for internet-scale systems in a fast-paced environment. 🗂️ Requirements: 5+ years of commercial experience with .NET Core and C#, Strong foundation in computer science, Proficiency in object-oriented design, Knowledge of design patterns, Knowledge of algorithms and data structures, Experience designing end-to-end internet-scale solutions, Experience with large-scale production environments, Good understanding of SQL Server, Good understanding of Redis, Fluent English (written and verbal) 📃 Skills: .NET, C#, SQL, SQLServer, Redis, OOP, DesignPatterns, Algorithms, DataStructures 🏢 Description: Join the client's team in the travel-tech industry. RESPONSIBILITIES In this role, the infrastructure and platform used daily by millions of travelers worldwide will be designed and built. The focus is on full transparency, continuous improvement, innovation, and maximizing the use of technology. The team will be responsible for designing and developing a new architecture in .NET 8 to support high-scale products. REQUIREMENTS A solid foundation in computer science and strong competencies in object-orienteddesign, design patterns, algorithms, and data structures, with solid developmentexperience in .NET Core / C# - At least 5+ years experience. Thrive in a fast-paced environment, able to adapt and learn new technologies quickly. Hands-on experience designing, developing, and deploying end-to-end solutions for internet-scale problems. Good understanding of SQL Server and Redis. Experience with large-scale production environments. Excellent communication skills, initiative, and teamwork. High level of communication skills (written and verbal) in English NICE TO HAVE Experience in travel tech. Working with CI/CD is an advantage. Experience with containers and Kubernetes. Experience with NoSQL databases (like Elasticsearch) WHAT DO WE OFFER ON THIS PROJECT? Cooperation based on a B2B contract. Hybrid work from Warsaw (2 times a week in the office). The support of a dedicated mentor. In the relationship, we focus on direct communication. When you join speedapp, you will be put in touch with a dedicated mentor who will make sure that you enjoy working with us and with the client. Events and integration meetings, as well as participation in various initiatives, e.g., sports. Access to the benefits offering (medical care, life insurance, Multisport card). WHAT DOES THE RECRUITMENT PROCESS LOOK LIKE? Application: Apply and submit your CV. After the application review, the recruiter will contact selected candidates by phone. Screening: Have a conversation with a speedapp recruiter about your experience. Next steps: The speedapp recruiter will explain the recruitment process for the specific position. The speedapp recruiter will stay in touch with you throughout the entire process. ABOUT SPEEDAPP At speedapp, we believe that an organization is only as good as the people who make it up. We are a team of IT experts and other professionals working for our clients around the world (including Israel, Austria, USA). We go far beyond the HR category. We build IT teams and also help manage them. 👉 10 years of experience 👉 +100 clients worldwide +300 hires per year 💎 We have won the prestigious "Forbes Diamonds" award four times (2022, 2023, 2024, 2025). We are a member of the European Fast Growth Icons network and FinTech Poland. We are ranked 18th among the 100 fastest growing companies 2023 by Clutch. DO YOU HAVE ANY QUESTIONS? Contact the recruiter responsible for this process directly. Aleksandra Mazur Senior IT Research Consultant aleksandra.mazur@speedapp.pl +48 728 360 029

🏢 Summary: The role involves designing and building high-scale infrastructure and platform solutions in .NET 8 for a global travel-tech product used by millions of users. The position focuses on developing a new architecture for internet-scale systems with an emphasis on innovation and continuous improvement. It includes end-to-end solution design and deployment in large-scale production environments. 🗂️ Requirements: 5+ years of experience with .NET Core and C#, Strong foundation in computer science, Strong knowledge of object-oriented design, Knowledge of design patterns, Knowledge of algorithms and data structures, Experience designing end-to-end solutions for internet-scale systems, Experience with large-scale production environments, Good understanding of SQL Server, Good understanding of Redis, Fluent English (written and verbal) 📃 Skills: .NET, C#, SQL, SQLServer, Redis, Kubernetes, Docker, Elasticsearch, CI/CD, NoSQL 🏢 Description: Join the client's team in the travel-tech industry.. RESPONSIBILITIES In this role, the infrastructure and platform used daily by millions of travelers worldwide will be designed and built. The focus is on full transparency, continuous improvement, innovation, and maximizing the use of technology. The team will be responsible for designing and developing a new architecture in .NET 8 to support high-scale products. REQUIREMENTS A solid foundation in computer science and strong competencies in object-orienteddesign, design patterns, algorithms, and data structures, with solid developmentexperience in .NET Core / C# - At least 5+ years experience. Thrive in a fast-paced environment, able to adapt and learn new technologies quickly. Hands-on experience designing, developing, and deploying end-to-end solutions for internet-scale problems. Good understanding of SQL Server and Redis. Experience with large-scale production environments. Excellent communication skills, initiative, and teamwork. High level of communication skills (written and verbal) in English NICE TO HAVE Experience in travel tech. Working with CI/CD is an advantage. Experience with containers and Kubernetes. Experience with NoSQL databases (like Elasticsearch) WHAT DO WE OFFER ON THIS PROJECT? Cooperation based on a B2B contract. Hybrid work from Warsaw (2 times a week in the office). The support of a dedicated mentor. In the relationship, we focus on direct communication. When you join speedapp, you will be put in touch with a dedicated mentor who will make sure that you enjoy working with us and with the client. Events and integration meetings, as well as participation in various initiatives, e.g., sports. Access to the benefits offering (medical care, life insurance, Multisport card). WHAT DOES THE RECRUITMENT PROCESS LOOK LIKE? Application: Apply and submit your CV. After the application review, the recruiter will contact selected candidates by phone. Screening: Have a conversation with a speedapp recruiter about your experience. Next steps: The speedapp recruiter will explain the recruitment process for the specific position. The speedapp recruiter will stay in touch with you throughout the entire process. ABOUT SPEEDAPP At speedapp, we believe that an organization is only as good as the people who make it up. We are a team of IT experts and other professionals working for our clients around the world (including Israel, Austria, USA). We go far beyond the HR category. We build IT teams and also help manage them. 👉 10 years of experience 👉 +100 clients worldwide +300 hires per year 💎 We have won the prestigious "Forbes Diamonds" award four times (2022, 2023, 2024, 2025). We are a member of the European Fast Growth Icons network and FinTech Poland. We are ranked 18th among the 100 fastest growing companies 2023 by Clutch. DO YOU HAVE ANY QUESTIONS? Contact the recruiter responsible for this process directly. Aleksandra Mazur Senior IT Research Consultant aleksandra.mazur@speedapp.pl +48 728 360 029

🏢 Summary: Senior .NET Developer role focused on designing and building a new .NET 8 architecture for high-scale travel-tech products used by millions of users. The position involves developing and deploying internet-scale solutions in a large production environment. The offer includes hybrid work and long-term B2B cooperation. 🗂️ Requirements: 5+ years experience with .NET Core and C#, Strong knowledge of OOP, design patterns, algorithms, data structures, Experience designing and deploying end-to-end internet-scale solutions, Experience with large-scale production environments, Good knowledge of SQL Server, Good knowledge of Redis, Fluent English (written and spoken) 📃 Skills: .NET, C#, .NET8, SQLServer, Redis, OOP, DesignPatterns, Algorithms, DataStructures, CI/CD, Kubernetes, Elasticsearch, NoSQL, Containers 🏢 Description: Join the client's team in the travel-tech industry as Senior .Net  Developer. RESPONSIBILITIES In this role, the infrastructure and platform used daily by millions of travelers worldwide will be designed and built. The focus is on full transparency, continuous improvement, innovation, and maximizing the use of technology. The team will be responsible for designing and developing a new architecture in .NET 8 to support high-scale products. REQUIREMENTS A solid foundation in computer science and strong competencies in object-orienteddesign, design patterns, algorithms, and data structures, with solid developmentexperience in .NET Core / C# - At least 5+ years experience. Thrive in a fast-paced environment, able to adapt and learn new technologies quickly. Hands-on experience designing, developing, and deploying end-to-end solutions for internet-scale problems. Good understanding of SQL Server and Redis. Experience with large-scale production environments. Excellent communication skills, initiative, and teamwork. High level of communication skills (written and verbal) in English NICE TO HAVE Experience in travel tech. Working with CI/CD is an advantage. Experience with containers and Kubernetes. Experience with NoSQL databases (like Elasticsearch) WHAT DO WE OFFER ON THIS PROJECT? Cooperation based on a B2B contract. Hybrid work from Warsaw (2 times a week in the office). The support of a dedicated mentor. In the relationship, we focus on direct communication. When you join speedapp, you will be put in touch with a dedicated mentor who will make sure that you enjoy working with us and with the client. Events and integration meetings, as well as participation in various initiatives, e.g., sports. Access to the benefits offering (medical care, life insurance, Multisport card). WHAT DOES THE RECRUITMENT PROCESS LOOK LIKE? Application: Apply and submit your CV. After the application review, the recruiter will contact selected candidates by phone. Screening: Have a conversation with a speedapp recruiter about your experience. Next steps: The speedapp recruiter will explain the recruitment process for the specific position. The speedapp recruiter will stay in touch with you throughout the entire process. ABOUT SPEEDAPP At speedapp, we believe that an organization is only as good as the people who make it up. We are a team of IT experts and other professionals working for our clients around the world (including Israel, Austria, USA). We go far beyond the HR category. We build IT teams and also help manage them. 👉 10 years of experience 👉 +100 clients worldwide +300 hires per year 💎 We have won the prestigious "Forbes Diamonds" award four times (2022, 2023, 2024, 2025). We are a member of the European Fast Growth Icons network and FinTech Poland. We are ranked 18th among the 100 fastest growing companies 2023 by Clutch. DO YOU HAVE ANY QUESTIONS? Contact the recruiter responsible for this process directly. Aleksandra Mazur Junior IT Delivery Consultant mail@speedapp.pl +48 728 360 029

🏢 Summary: IT Project Manager role in the telco industry responsible for leading end-to-end delivery of complex IT initiatives in Agile, multi-team environments. The position focuses on project governance, budget ownership, risk management, vendor coordination, and executive reporting, with strong emphasis on Jira/Confluence and AI-supported project practices. Available at Mid and Senior levels with increasing scope of ownership and strategic impact. 🗂️ Requirements: Minimum 4 years of IT project management experience (Mid) or 6+ years (Senior), Proven delivery of IT projects on time, within budget and scope, Experience in multi-team Agile environments, Practical experience with Scrum and/or Kanban, Experience coordinating cross-functional technical teams, Experience owning and managing project budgets, Experience in cost planning, tracking, forecasting and reporting, Experience managing vendors and contractual deliverables, Demonstrated risk identification and mitigation, Experience with unit and integration testing processes, Advanced Jira proficiency, Strong Confluence experience, Experience with delivery metrics (velocity, lead time, cycle time, throughput), English proficiency minimum B2 📃 Skills: Jira, Confluence, Agile, Scrum, Kanban, AI, Testing, Metrics, PMP, PRINCE2, SAFe, Forecasting, Budgeting, Reporting 🏢 Description: Join the client's team in the telco industry.. RESPONSIBILITIES Lead IT projects from initiation through delivery and closure. Coordinate delivery across Product Owners, Engineering Leads, Architects, QA Engineers, and business stakeholders. Plan and maintain project roadmaps aligned with business strategy. Support backlog prioritization and refinement in collaboration with Product Owners. Proactively identify, assess, mitigate, and escalate project risks. Own project budgets, including planning, tracking, forecasting, and financial reporting. Manage vendor costs, deliverables, and contractual commitments. Provide executive-level status reporting and decision support. Facilitate communication and expectation management across technical and business stakeholders. Leverage AI tools to improve project documentation, reporting, communication, and risk analysis. Maintain structured project documentation and knowledge management in Jira and Confluence. REQUIREMENTS Minimum 4 years of experience managing IT projects (Mid level) or 6+ years managing complex IT projects (Senior level). Proven track record of delivering projects on time, within budget, and within agreed scope. Experience working in multi-team Agile environments. Practical experience with Scrum and/or Kanban methodologies. Experience coordinating delivery across multiple teams. Experience owning project budgets. Experience planning, tracking, forecasting, and reporting project costs. Ability to present financial status clearly to senior stakeholders. Experience managing vendor costs and contract deliverables. emonstrated experience in proactive risk identification and mitigation. Ability to build and execute risk mitigation plans. Experience presenting risks in concise, action-oriented formats. Track record of preventing delivery issues through early intervention. Experience with unit and integration testing and a quality-focused mindset. Experience communicating with both technical and non-technical audiences. Ability to facilitate decision-making and manage stakeholder expectations. Experience reporting to senior leadership. Advanced Jira proficiency. Strong Confluence experience. Experience with delivery metrics such as velocity, lead time, cycle time, and throughput. English language proficiency at B2 level minimum (C1 preferred). Senior-level candidates should additionally demonstrate: Ownership of large-scale or multi-team delivery initiatives. Full ownership of project budgets and forecasting processes. Direct communication with senior management and directors. Driving delivery improvements and process optimization. Practical implementation of AI-enabled project management practices. NICE TO HAVE Telecommunications industry experience. Technical background that supports effective collaboration with engineering teams. PMP, PMI-ACP, PRINCE2, or similar project management certifications. SAFe framework awareness. Experience supporting digital transformation initiatives. Practical experience using AI-assisted project management tools. WHAT DO WE OFFER ON THIS PROJECT? Cooperation based on a B2B contract. Hybrid work from Warsaw (1-2 times a week in the office). The support of a dedicated mentor. In the relationship, we focus on direct communication. When you join speedapp, you will be put in touch with a dedicated mentor who will make sure that you enjoy working with us and with the client. Events and integration meetings, as well as participation in various initiatives, e.g., sports. Access to the benefits offering (medical care, life insurance, Multisport card). WHAT DOES THE RECRUITMENT PROCESS LOOK LIKE? Application: Apply and submit your CV. After the application review, the recruiter will contact selected candidates by phone. Screening: Have a conversation with a speedapp recruiter about your experience. Next steps: The speedapp recruiter will explain the recruitment process for the specific position. The speedapp recruiter will stay in touch with you throughout the entire process. ABOUT SPEEDAPP At speedapp, we believe that an organization is only as good as the people who make it up. We are a team of IT experts and other professionals working for our clients around the world (including Israel, Austria, USA). We go far beyond the HR category. We build IT teams and also help manage them. 👉 10 years of experience 👉 +100 clients worldwide +300 hires per year 💎 We have won the prestigious "Forbes Diamonds" award four times (2022, 2023, 2024, 2025). We are a member of the European Fast Growth Icons network and FinTech Poland. We are ranked 18th among the 100 fastest growing companies 2023 by Clutch. DO YOU HAVE ANY QUESTIONS? Contact the recruiter responsible for this process directly. Aleksandra Mazur Junior IT Delivery Consultant aleksandra.mazur@speedapp.pl +48 728 360 029

🏢 Summary: B2B contract role for a Senior Full-Stack Engineer to build and own features end-to-end, from Java/Spring backend services and data models to React-based frontend interfaces. The position involves contributing to shared UI components and backend architecture, performing cross-stack code reviews, and working in a cloud-native environment. 🗂️ Requirements: Strong backend experience with Java 21, Proficiency in Spring and Spring Boot, Experience with Hibernate, Solid frontend experience with JavaScript and TypeScript, Strong knowledge of React and Redux Toolkit, Good understanding of relational databases, especially MariaDB, User-level or higher Linux skills, Confident use of Git workflows, Ability to write well-tested, maintainable code, Advanced technical English, Experience with Kubernetes and cloud-native platforms, Ability to effectively use AI coding assistants and LLM tools 📃 Skills: Java, Spring, SpringBoot, Hibernate, JavaScript, TypeScript, React, Redux, MariaDB, SQL, Linux, Git, Kubernetes, AI, LLM 🏢 Description: Join our client's team as a Senior Full-Stack Engineer! RESPONSIBILITIES Own features end-to-end — from API and data model on the backend to the UI on the frontend Build and maintain backend services in Java, and rich interfaces in React Contribute to our shared UI component library and backend architecture alike Take part in code reviews across the stack — backend, frontend, and the glue in between REQUIREMENTS Strong backend skills in Java 21 with Spring / Spring Boot and Hibernate Solid frontend experience with JavaScript, TypeScript, React, and Redux Toolkit Good grasp of relational databases, especially MariaDB Linux skills at user level or above, plus confident Git workflows You write well-tested, maintainable code on both sides of the stack Advanced technical English for design, review, and documentation\ Proven experience with cloud-native platforms such as Kubernetes Comfortable using AI tools (coding assistants, LLMs) as part of your daily workflow — and the judgment to know when to trust them and when to think for yourself NICE TO HAVE Experience building software for telecommunication systems Knowledge of protocols like IPv4/6, DNS, BGP, DHCP, SR, and ZTP Data visualization libraries — Cytoscape.js, react-chartjs-2, MapLibre, or similar Storybook, mono-repo tooling (Lerna), or Webpack experience Automation tools such as Ansible or Terraform Understanding of Linux and Kubernetes networking (routing, iptables, CNI) WHAT DO WE OFFER ON THIS PROJECT? Cooperation based on a B2B contract and rate: 160-180 PLN/hour Hybrid work from Kraków (1 times a week in the office) The support of a dedicated mentor. In the relationship, we focus on direct communication. When you join speedapp, you will be put in touch with a dedicated mentor who will make sure that you enjoy working with us and with the client Events and integration meetings, as well as participation in various initiatives, e.g., sports Access to the benefits offering (medical care, Multisport card) WHAT DOES THE RECRUITMENT PROCESS LOOK LIKE? Application: Apply and submit your CV. After the application review, the recruiter will contact selected candidates by phone. Screening: Have a conversation with a speedapp recruiter about your experience. Next steps: The speedapp recruiter will explain the recruitment process for the specific position. The speedapp recruiter will stay in touch with you throughout the entire process. ABOUT SPEEDAPP At speedapp, we believe that an organization is only as good as the people who make it up. We are a team of IT experts and other professionals working for our clients around the world (including Israel, Austria, USA). We go far beyond the HR category. We build IT teams and also help manage them. 👉 10 years of experience 👉 +100 clients worldwide +300 hires per year 💎 We have won the prestigious "Forbes Diamonds" award four times (2022, 2023, 2024, 2025). We are a member of the European Fast Growth Icons network and FinTech Poland. We are ranked 18th among the 100 fastest growing companies 2023 by Clutch. DO YOU HAVE ANY QUESTIONS? Contact the recruiter responsible for this process directly. Karolina Kizowska Senior IT Delivery Consultant karolina.kizowska@speedapp.pl +48 608 487 448

🏢 Summary: Offer for a Senior Front-End Developer to develop and modernize a key internal web system in the financial-insurance sector. The role focuses on Angular-based architecture modernization, implementation of new features, performance optimization, and technical leadership within a small team. Responsibilities include technical decision-making, mentoring, code reviews, and ensuring system stability, security, and scalability. 🗂️ Requirements: Minimum 5 years commercial experience as Front-End Developer, Minimum 3 years experience building web or mobile applications, Minimum 2 years experience working in Agile/Scrum, Very good knowledge of Angular, Very good knowledge of TypeScript and JavaScript (ES6+), Knowledge of HTML5, CSS3, SCSS and CSS architectures, Knowledge of RxJS, Experience with Git, Node.js and npm, Knowledge of HTTP protocol and REST and WebSockets integration, Experience with unit testing (Jest or Vitest), Knowledge of Webpack or Vite, Experience with microfrontends (Module Federation, Web Components), Higher education degree in Computer Science or related field, English proficiency for working with technical documentation 📃 Skills: Angular, TypeScript, JavaScript, HTML5, CSS3, SCSS, RxJS, Git, Node.js, npm, HTTP, REST, WebSockets, Jest, Vitest, Webpack, Vite, ModuleFederation, WebComponents, AngularMaterial, Agile, Scrum 🏢 Description: Dołącz do zespołu klienta z branży finansowo-ubezpieczeniowej i rozwijaj kluczowy system webowy wspierający procesy biznesowe organizacji. ZADANIA Będziesz pracować nad rozwojem i utrzymaniem rozbudowanego systemu webowego, wykorzystywanego wewnętrznie do obsługi procesów operacyjnych i biznesowych. Projekt obejmuje modernizację architektury front-endowej, wdrażanie nowych funkcjonalności oraz poprawę wydajności i jakości kodu. Zespół: Kameralny zespół projektowy, w tym 2 developerów Front-End Ścisła współpraca z architektem systemu oraz zespołami backend i QA Głównym celem zespołu jest zapewnienie stabilności, bezpieczeństwa i skalowalności systemu oraz rozwój nowych funkcji Zakres odpowiedzialności: Techniczny mentoring i wsparcie dla developerów Front-End Podejmowanie decyzji technicznych oraz projektowanie rozwiązań Współpraca z architektem systemu w zakresie kierunków rozwoju technologicznego Projektowanie zmian z uwzględnieniem bezpieczeństwa danych, jakości architektury i ciągłości działania Implementacja nowych funkcjonalności zgodnie ze standardami i dobrymi praktykami Przeglądy kodu (code review) Identyfikacja i redukcja długu technologicznego, inicjowanie refaktoryzacji Wsparcie przy wdrożeniach oraz rozwiązywanie problemów technicznych Analiza błędów i optymalizacja wydajności systemu Estymacja pracochłonności zmian WYMAGANIA Doświadczenie i kompetencje techniczne: Minimum 5 lat doświadczenia komercyjnego jako Front-End Developer Minimum 3 lata doświadczenia w tworzeniu aplikacji webowych lub mobilnych Minimum 2 lata doświadczenia w pracy w metodykach zwinnych (Agile/Scrum) Bardzo dobra znajomość Angular (komponenty, moduły, serwisy, DI, routing, formularze, lazy loading, optymalizacja) Znajomość Angular Material lub innej biblioteki UI Bardzo dobra znajomość TypeScript oraz JavaScript (ES6+) Znajomość HTML5, CSS3, SCSS oraz architektur CSS Znajomość RxJS Doświadczenie z Git, Node.js, npm Znajomość protokołu HTTP oraz integracji REST i WebSockets Doświadczenie w testach jednostkowych (Jest lub Vitest) Znajomość narzędzi bundlujących (Webpack lub Vite) Doświadczenie z mikrofrontendami (Module Federation, Web Components) Dodatkowo: Znajomość dobrych praktyk programistycznych i procesu wytwarzania oprogramowania Znajomość wzorców projektowych i architektonicznych Umiejętność podejmowania decyzji technicznych i mentoringu zespołu Komunikatywność i umiejętność pracy zespołowej Znajomość języka angielskiego umożliwiająca pracę z dokumentacją techniczną Wykształcenie wyższe informatyczne lub pokrewne MILE WIDZIANE Znajomość standardów dostępności (WCAG) oraz RWD Wiedza z zakresu Web Performance Doświadczenie z CI/CD (np. Jenkins) Znajomość Service Workers i Web Push API Podstawowa znajomość Docker i Kubernetes CO OFERUJEMY NA TYM PROJEKCIE? Współpracę w oparciu o umowę B2B. Pracę hybrydową z Warszawy (1 razy w tygodniu w biura). Wsparcie dedykowanego opiekuna. Po dołączeniu do speedapp, otrzymasz kontakt do dedykowanego opiekuna, który zadba, aby współpraca z nami oraz z klientem sprawiała Ci satysfakcję. Wydarzenia oraz spotkania integracyjne, a także udział w różnych inicjatywach np. sportowych. Dostęp do oferty benefitów (opieka medyczna, ubezpieczenie na życie, karta Multisport). JAK WYGLĄDA REKRUTACJA? Zgłoszenie : Zaaplikuj i prześlij swoje CV. Po weryfikacji aplikacji rekruter skontaktuje się telefonicznie z wybranymi kandydatami. Screening : Porozmawiaj z rekruterem speedapp o Twoim doświadczeniu . Kolejne etapy: Rekruter speedapp przedstawi Ci jak wygląda proces rekrutacji na dane stanowisko. Rekruter speedapp pozostanie z Tobą w kontakcie podczas całego procesu. O SPEEDAPP W speedapp wierzymy, że organizacja jest tak dobra jak tworzący ją ludzie. Jesteśmy zespołem ekspertów IT i innych specjalistów pracujących dla naszych klientów na całym świecie (m.in Izrael, Austria, USA). Wykraczamy daleko poza kategorię HR. Budujemy zespoły IT, a także pomagamy w ich zarządzaniu. 👉 10 lat doświadczenia 👉 +100 klientów na całym świecie +300 zatrudnień rocznie 💎 Jesteśmy laureatem prestiżowej nagrody Diamenty Forbes cztery lata z rzędu (2022, 2023, 2024, 2025), członkiem sieci Fast Growth Icons oraz FinTech Poland. MASZ PYTANIA? Skontaktuj się bezpośrednio z rekruterem odpowiedzialnym za ten proces. Adrianna Rudzka Junior IT Delivery Consultant adrianna.rudzka@speedapp.pl +48 884 271 647

🏢 Summary: Backend Developer role focused on building and maintaining scalable microservices-based web platforms for international projects. The position involves designing and developing high-performance REST APIs, implementing new features, optimizing application performance, and ensuring code quality through testing and reviews. The engineer will have real impact on system architecture and technical direction. 🗂️ Requirements: Minimum 5 years commercial experience with Node.js, Strong knowledge of Express.js, Strong knowledge of NestJS, Solid knowledge of TypeScript, Experience with SQL databases, Experience with ORM tools (e.g. TypeORM), Experience designing and implementing REST API, Knowledge of SOLID principles and design patterns, Experience with unit and E2E testing (e.g. Jest), Proficiency with Git, Experience with Docker and containerization, Experience with microservices architecture, English level B2 or higher 📃 Skills: Node.js, Express.js, NestJS, TypeScript, SQL, TypeORM, REST, SOLID, Jest, Git, Docker, Microservices, AWS, Azure, GCP, Prometheus, Grafana, ELK, CI/CD, GitLabCI, GitHubActions, Jenkins, GraphQL 🏢 Description: Dołącz do zespołu klienta z branży technologicznej i twórz nowoczesne, skalowalne rozwiązania backendowe wykorzystywane w projektach o międzynarodowym zasięgu. Będziesz mieć realny wpływ na architekturę systemów oraz kierunek ich dalszego rozwoju. ZADANIA Rozwój i utrzymanie backendu platformy webowej opartej o architekturę mikroserwisową, której celem jest zapewnienie wysokiej wydajności, stabilności i skalowalności. Praca nad usługami obsługującymi dużą liczbę użytkowników z różnych krajów. Projektowanie i rozwijanie REST API. Implementacja nowych funkcjonalności zgodnie z wymaganiami biznesowymi i technicznymi. Utrzymanie istniejącego kodu, debugowanie oraz rozwiązywanie problemów produkcyjnych. Monitorowanie wydajności aplikacji i optymalizacja jej działania. Tworzenie i utrzymywanie testów jednostkowych oraz end-to-end. Udział w code review i dbanie o wysoką jakość kodu. Tworzenie i aktualizacja dokumentacji technicznej. Aktywny udział w spotkaniach zespołowych (daily, planowanie, refinement). Wsparcie zespołu w estymacjach projektowych i działaniach biznesowych. Mentoring młodszych programistów i dzielenie się wiedzą. WYMAGANIA Minimum 5 lat komercyjnego doświadczenia w tworzeniu aplikacji backendowych z wykorzystaniem Node.js . Bardzo dobra znajomość frameworków Express.js oraz NestJS . Solidna znajomość TypeScript . Doświadczenie w pracy z bazami danych SQL oraz ORM (np. TypeORM ). Praktyczne doświadczenie w projektowaniu i implementacji REST API . Znajomość zasad SOLID i wzorców projektowych. Doświadczenie w pisaniu testów jednostkowych i E2E (np. Jest ). Dobra znajomość GIT jako systemu kontroli wersji. Doświadczenie w pracy z Dockerem i konteneryzacją aplikacji. Znajomość architektury mikroserwisowej i doświadczenie w projektach opartych o mikroserwisy. Umiejętność pracy zespołowej, komunikatywność i otwartość na feedback. Samodzielność, proaktywność oraz chęć rozwoju i podnoszenia kwalifikacji. Znajomość języka angielskiego na poziomie minimum B2 . Wykształcenie wyższe techniczne (informatyka lub pokrewne) będzie dodatkowym atutem. MILE WIDZIANE Doświadczenie w pracy z chmurą (AWS, Azure, GCP). Znajomość narzędzi do monitoringu i obserwowalności (np. Prometheus, Grafana, ELK). Doświadczenie z CI/CD (GitLab CI, GitHub Actions, Jenkins). Znajomość GraphQL. Doświadczenie w pracy w projektach o dużej skali i wysokiej dostępności (high availability). Doświadczenie w branżach takich jak fintech, e-commerce, healthcare lub SaaS. CO OFERUJEMY NA TYM PROJEKCIE? Współpracę w oparciu o umowę B2B. Pracę 100% zdalną. Wsparcie dedykowanego opiekuna. Po dołączeniu do speedapp, otrzymasz kontakt do dedykowanego opiekuna, który zadba, aby współpraca z nami oraz z klientem sprawiała Ci satysfakcję. Wydarzenia oraz spotkania integracyjne, a także udział w różnych inicjatywach np. sportowych. Dostęp do oferty benefitów (opieka medyczna, ubezpieczenie na życie, karta Multisport). JAK WYGLĄDA REKRUTACJA? Zgłoszenie: Zaaplikuj i prześlij swoje CV. Po weryfikacji aplikacji rekruter skontaktuje się telefonicznie z wybranymi kandydatami. Screening: Porozmawiaj z rekruterem speedapp o Twoim doświadczeniu. Kolejne etapy: Rekruter speedapp przedstawi Ci jak wygląda proces rekrutacji na dane stanowisko. Rekruter speedapp pozostanie z Tobą w kontakcie podczas całego procesu. O SPEEDAPP W speedapp wierzymy, że organizacja jest tak dobra jak tworzący ją ludzie. Jesteśmy zespołem ekspertów IT i innych specjalistów pracujących dla naszych klientów na całym świecie (m.in Izrael, Austria, USA). Wykraczamy daleko poza kategorię HR. Budujemy zespoły IT, a także pomagamy w ich zarządzaniu. 👉 10 lat doświadczenia 👉 +100 klientów na całym świecie +300 zatrudnień rocznie 💎 Jesteśmy laureatem prestiżowej nagrody Diamenty Forbes cztery lata z rzędu (2022, 2023, 2024, 2025), członkiem sieci Fast Growth Icons oraz FinTech Poland. MASZ PYTANIA? Skontaktuj się bezpośrednio z rekruterem odpowiedzialnym za ten proces. Adrianna RudzkaJunior IT Delivery Consultantadrianna.rudzka@speedapp.pl +48 884 271 647

🏢 Summary: B2B remote role for a .NET Developer to design and maintain high-performance back-end services and scalable cloud solutions in AWS for industrial systems. The position focuses on API development, system integrations, and ensuring code quality through solid engineering and testing practices within a collaborative team. 🗂️ Requirements: Hands-on experience with AWS in production environments, Strong back-end engineering fundamentals, Experience with API design and integrations, Focus on performance and maintainability, Availability to work in PL/EU working hours 📃 Skills: .NET, C#, AWS, APIs 🏢 Description: For a client in the technology sector, developing industrial systems industry, we are looking for a position .Net Developer RESPONSIBILITIES Design, develop, and maintain high-performance back-end services using .NET (C#). Build scalable and resilient solutions using AWS services and databases. Collaborate with front-end developers and other engineers to integrate back-end services and APIs. Participate in code reviews, architectural discussions, and sprint planning. Contribute to keeping the codebase testable and reliable through solid unit/integration testing and good engineering practices. Work closely with the QA team to ensure quality and smooth releases (with less emphasis on personally owning E2E tests). Share knowledge and support less experienced team members as part of day-to-day collaboration. Stay up to date with relevant technologies and continuously improve the system. Tech Stack You’ll Be Working With •    Cloud: AWS •    Back-End: .NET (C#) •    Front-End (tooling/testing support): TypeScript (nice to have) REQUIREMENTS Hands-on experience with cloud environments in production (AWS preferred). Strong back-end engineering fundamentals: API design, integrations, performance, and maintainability. Ability to communicate clearly and work effectively in a collaborative team. Availability to work with a Poland-based team (PL/EU working hours). NICE TO HAVE Background in Electrical Engineering or a related technical field. Bachelor’s degree in Computer Science or a related field (or equivalent experience). Git and modern code review workflows. Experience working in an Agile environment. Familiarity with TypeScript/JavaScript. Familiarity with test tools like Playwright or Selenium. Engineering mentor mindset: enjoys sharing knowledge, coaching others, and reinforcing good habits through reviews, pairing, and pragmatic guidance. Understanding of QA methodologies and release processes. WHAT DO WE OFFER ON THIS PROJECT? Cooperation based on a B2B contract. 100% remote work. The support of a dedicated mentor. In the relationship, we focus on direct communication. When you join speedapp, you will be put in touch with a dedicated mentor who will make sure that you enjoy working with us and with the client. Events and integration meetings, as well as participation in various initiatives, e.g., sports. Access to the benefits offering (medical care, life insurance, Multisport card). WHAT DOES THE RECRUITMENT PROCESS LOOK LIKE? Application: Apply and submit your CV. After the application review, the recruiter will contact selected candidates by phone. Screening: Have a conversation with a speedapp recruiter about your experience. Next steps: The speedapp recruiter will explain the recruitment process for the specific position. The speedapp recruiter will stay in touch with you throughout the entire process. ABOUT SPEEDAPP At speedapp, we believe that an organization is only as good as the people who make it up. We are a team of IT experts and other professionals working for our clients around the world (including Israel, Austria, USA). We go far beyond the HR category. We build IT teams and also help manage them. 👉 10 years of experience 👉 +100 clients worldwide +300 hires per year 💎 We have won the prestigious "Forbes Diamonds" award four times (2022, 2023, 2024, 2025). We are a member of the European Fast Growth Icons network and FinTech Poland. We are ranked 18th among the 100 fastest growing companies 2023 by Clutch. DO YOU HAVE ANY QUESTIONS? Contact the recruiter responsible for this process directly. Aleksandra Mazur Junior IT Delivery Consultant aleksandra.mazur@speedapp.pl +48 728 360 029

🏢 Summary: Backend Developer role in a travel-tech project focused on developing and maintaining a scalable microservices-based booking platform used across multiple European markets. The position involves building and optimizing backend services using Java and Spring (or Kotlin), designing REST APIs, and working with high-load systems handling hundreds of requests per second. You will contribute to system modernization and performance improvements within an international Scrum team. 🗂️ Requirements: Minimum 1 year commercial experience in Java and Spring or Kotlin, Experience with relational databases and SQL, Experience in designing and developing REST API and Web Services, Basic knowledge of microservices architecture, Ability to work with distributed systems handling high traffic, English level B2 or higher, Polish level C1 or higher 📃 Skills: Java, Spring, Kotlin, SQL, REST, WebServices, Microservices, NoSQL 🏢 Description: Dołącz do zespołu klienta z branży travel-tech i rozwijaj skalowalną platformę, z której korzystają tysiące użytkowników w ponad 20 krajach na świecie. ZADANIA Będziesz pracować przy rozwoju rozbudowanego systemu rezerwacyjnego, wspierającego realizację podróży dla klientów na wielu rynkach europejskich. Platforma działa w architekturze mikroserwisowej, obsługuje setki zapytań na sekundę i jest stale rozwijana oraz optymalizowana pod kątem wydajności i skalowalności. Twoje główne zadania: rozwój i utrzymanie backendu w oparciu o Java + Spring (lub Kotlin), projektowanie oraz rozwijanie REST API i Web Services, praca z relacyjnymi bazami danych (SQL), udział w modernizacji istniejących rozwiązań i migracji w kierunku nowoczesnej architektury, współpraca przy rozwoju systemu opartego na mikroserwisach, dbanie o jakość kodu oraz udział w code review, współpraca w zespole Scrumowym. Zespół: Dołączysz do jednego z backendowych zespołów (złożonych z doświadczonych developerów), pracujących nad kluczowymi elementami systemu. Zespół jest międzynarodowy, a część komunikacji odbywa się w języku angielskim. WYMAGANIA min. 1 rok komercyjnego doświadczenia w programowaniu w Java (Spring) i/lub Kotlin, doświadczenie w pracy z relacyjnymi bazami danych (SQL) , znajomość REST API / Web Services , podstawowa znajomość architektury mikroserwisowej lub chęć nauki w tym obszarze, znajomość języka angielskiego min. B2 (praca z dokumentacją, komunikacja), znajomość języka polskiego min. C1 , umiejętność pracy zespołowej, zaangażowanie oraz chęć rozwoju, samodzielność i uczciwe podejście do realizacji zadań (ważne w kontekście procesu rekrutacyjnego). MILE WIDZIANE doświadczenie z bazami NoSQL , znajomość architektury mikroserwisowej w praktyce, doświadczenie w branży travel lub e-commerce , zainteresowanie rozwiązaniami chmurowymi i skalowaniem systemów. CO OFERUJEMY NA TYM PROJEKCIE? Zatrudnienie bezpośrednio przez klienta. Współpracę w oparciu o umowę B2B/o pracę. Pracę hybrydową z Gdańska (2-3 razy w tygodniu w biura). Budżet rozwojowy 3000 PLN rocznie (kursy, konferencje, nauka), Opieka medyczna LuxMed Dofinansowanie do Multisport Miejsce w podziemny parkingu Hybrydowy system pracy; na etapie wdrożenia (3-6 miesięcy) będziesz częściej w biurze, ale później w miarę uzyskiwania samodzielności będziesz mieć możliwość częstszej pracy z domu Lekcje j. angielskiego JAK WYGLĄDA REKRUTACJA? Zgłoszenie : Zaaplikuj i prześlij swoje CV. Po weryfikacji aplikacji rekruter skontaktuje się telefonicznie z wybranymi kandydatami. Screening : Porozmawiaj z rekruterem speedapp o Twoim doświadczeniu . Kolejne etapy: Rekruter speedapp przedstawi Ci jak wygląda proces rekrutacji na dane stanowisko. Rekruter speedapp pozostanie z Tobą w kontakcie podczas całego procesu. O SPEEDAPP W speedapp wierzymy, że organizacja jest tak dobra jak tworzący ją ludzie. Jesteśmy zespołem ekspertów IT i innych specjalistów pracujących dla naszych klientów na całym świecie (m.in Izrael, Austria, USA). Wykraczamy daleko poza kategorię HR. Budujemy zespoły IT, a także pomagamy w ich zarządzaniu. 👉 10 lat doświadczenia 👉 +100 klientów na całym świecie +300 zatrudnień rocznie 💎 Jesteśmy laureatem prestiżowej nagrody Diamenty Forbes cztery lata z rzędu (2022, 2023, 2024, 2025), członkiem sieci Fast Growth Icons oraz FinTech Poland. MASZ PYTANIA? Skontaktuj się bezpośrednio z rekruterem odpowiedzialnym za ten proces. Adrianna Rudzka Junior IT Delivery Consultant adrianna.rudzka@speedapp.pl +48 884 271 647

🏢 Summary: Senior Frontend Developer role focused on building and maintaining complex cloud-based web applications for network configuration, monitoring, and optimization. The position involves developing new features, maintaining a custom UI component library, and contributing to code and UX reviews within a global team. Hybrid work model with long-term B2B cooperation. 🗂️ Requirements: 5+ years experience building complex web applications, Strong knowledge of JavaScript, Strong knowledge of TypeScript, Strong knowledge of HTML5, Strong knowledge of CSS3, Experience with React, Experience with Redux, Experience with Redux Toolkit, Experience writing well-tested maintainable code, Experience with REST API integration, Proficient English communication skills 📃 Skills: JavaScript, TypeScript, HTML5, CSS3, React, Redux, ReduxToolkit, REST, Cypress, ReactTestingLibrary, Webpack, Lerna, Storybook, Cytoscape, ChartJS, MapLibre 🏢 Description: For a client, we are looking for a Senior Frontend Developer Salary: 150-170 net+VAT B2B Hybrid model: 1 day per week from the office in Warsaw or Kraków RESPONSIBILITIES About our Team As a team member, you will have the possibility to participate in the whole development process in Network Cloud Team projects. The primary objective of our applications is to set up, configure, monitor, and optimize servers and networks for clients globally. Working in our team allows you to learn various network automation techniques, be part of and create a mobile network future, develop cloud-based applications and have a real impact on how it will look like. Role and Responsibilities Develop new features, as well as maintain existing ones. Implementation and maintenance of custom UI components library. Participate in code review, as well as UX design review. Cooperation with colleagues from other Centers around the world. REQUIREMENTS 5+ years of experience building complex web applications using JavaScript, TypeScript, HTML5, CSS3. Experience with React, Redux and Redux Toolkit; Familiarity writing well-tested, maintainable code (knowledge of Cypress.io and React Testing Library is a plus). Familiarity with REST API integration Proficient English communication skills. NICE TO HAVE Experience with Webpack; Experience with Lerna or other mono-repo solutions; Experience with Storybook and component libraries development; Experience with data visualization (knowledge of Cytoscape.js, react-chartjs-2, maplibre or similar libraries is a plus); WHAT DO WE OFFER ON THIS PROJECT? Cooperation based on a B2B contract and rate: 150-170 PLN/hour Hybrid work from Warsaw or Cracow (1 times a week in the office) The support of a dedicated mentor. In the relationship, we focus on direct communication. When you join speedapp, you will be put in touch with a dedicated mentor who will make sure that you enjoy working with us and with the client. Events and integration meetings, as well as participation in various initiatives, e.g., sports. Access to the benefits offering (medical care, life insurance, Multisport card). WHAT DOES THE RECRUITMENT PROCESS LOOK LIKE? Application: Apply and submit your CV. After the application review, the recruiter will contact selected candidates by phone. Screening: Have a conversation with a speedapp recruiter about your experience. Next steps: The speedapp recruiter will explain the recruitment process for the specific position. The speedapp recruiter will stay in touch with you throughout the entire process. ABOUT SPEEDAPP At speedapp, we believe that an organization is only as good as the people who make it up. We are a team of IT experts and other professionals working for our clients around the world (including Israel, Austria, USA). We go far beyond the HR category. We build IT teams and also help manage them. 👉 10 years of experience 👉 +100 clients worldwide +300 hires per year 💎 We have won the prestigious "Forbes Diamonds" award four times (2022, 2023, 2024, 2025). We are a member of the European Fast Growth Icons network and FinTech Poland. We are ranked 18th among the 100 fastest growing companies 2023 by Clutch. DO YOU HAVE ANY QUESTIONS? Contact the recruiter responsible for this process directly. Iga Olszewska-Magnowska Senior IT Delivery Consultant iga.olszewska@speedapp.pl