Software Engineer - Fullstack (Angular, Flutter, C#/.Net)

🏢 Summary: Software Engineer role focused on building scalable, high-quality applications with primary emphasis on frontend development in Angular and Flutter, while supporting backend services in C#/.NET and SQL. The position involves developing RESTful APIs, integrating frontend and backend components, and ensuring security, performance, and scalability in an Agile environment. 🗂️ Requirements: 2+ years commercial software development experience, Strong knowledge of Angular and Flutter, Strong knowledge of HTML, CSS, TypeScript, JavaScript, Experience with C# and .NET, Experience with SQL Server, Experience designing and integrating REST APIs, Familiarity with Git, Experience working in Agile environment 📃 Skills: Angular, Flutter, HTML, CSS, TypeScript, JavaScript, C#, .NET, SQL, SQLServer, NoSQL, Git, Agile, REST, APIs 🏢 Description: Our Client is a fast-growing technology group headquartered in London, focused on building industry-specific payment solutions for small and medium-sized businesses. Client develops tailored software solutions across multiple sectors, including retail, services, healthcare, sports, public sector, and non-profit . The company operates across several locations in the UK and has a technology hub in Kraków , offering an international, product-driven working environment. Your role We are looking for a Software Engineer to join a dynamic development team and contribute to building high-quality, scalable applications with real business impact. The role focuses primarily on frontend development using Angular and Flutter , while also supporting backend services built with C#/.NET and SQL . You will work closely with cross-functional teams to deliver secure, performant, and user-friendly solutions, with opportunities to grow across multiple technologies. Your responsibilities Develop, maintain, and enhance applications using Angular and Flutter Support backend development with C#/.NET and SQL Design and implement RESTful APIs and integrate them with frontend applications Ensure application security, performance, and scalability Perform unit testing, debugging, and participate in code reviews Work in Agile sprints (planning, development, testing, deployment) Collaborate closely with Product teams to translate business requirements into technical solutions Stay up to date with emerging technologies and propose improvements Our requirements 2+ years of commercial software development experience Strong knowledge of Angular, Flutter, HTML, CSS, TypeScript, and JavaScript Experience with C#/.NET and SQL Server (NoSQL is a plus) Familiarity with Git and Agile methodologies Strong problem-solving skills and attention to detail Very good communication in English and teamwork skills Proactive attitude and willingness to learn Nice to have Interest in cross-platform development What we offer Long-term project Chill zone with a football table Integration events Collaborative, product-focused team Opportunity to grow within a fast-evolving tech company Participation in meaningful products used daily by real customers 📌 Please note: we will contact selected candidates only . TQLO Sp. z o.o. Registered employment agency (KRAZ): 33580

🏢 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: Full-time remote Software Engineer role focused on building and maintaining enterprise-grade web applications using Angular 20+ and ASP.NET Core (.NET 9+) in a cloud-native environment. The position involves end-to-end development, secure integrations, scalable architecture, and CI/CD-driven deployments. The engineer will work across the full stack, ensuring performance, security, and high code quality. 🗂️ Requirements: Strong experience with modern web development, Proficiency in Angular 20+, Proficiency in ASP.NET Core (.NET 9+), Proficiency in TypeScript and C#, Experience with Azure AD and MSAL, Experience with Entity Framework Core, Experience with SQL Server and relational databases, Experience with Docker and Kubernetes, Experience with CI/CD pipelines, Ability to write unit and integration tests 📃 Skills: Angular, ASP.NET, TypeScript, C#, AzureAD, MSAL, EntityFramework, SQL, Docker, Kubernetes, CI/CD, Vitest, xUnit, Moq, Azure, REST, AzureDevOps 🏢 Description: Software Engineer Work model : Remote Employment Type: Full-Time Job Summary We are seeking a highly skilled Software Engineer with strong experience in modern web application development to join our team in a fully remote setup. The ideal candidate will design, build, and maintain enterprise-grade applications using Angular 20+, ASP.NET Core (.NET 9+), and cloud-native technologies. This role requires excellent technical expertise, a proactive mindset, and the ability to collaborate effectively within cross-functional teams while working independently on complex tasks. Key Responsibilities Design and develop enterprise applications using Angular 20+ for the front end and ASP.NET Core (.NET 9+) for the back end. Implement standalone components and signals-based architecture to deliver responsive and maintainable user interfaces. Integrate Azure MSAL authentication, RESTful APIs, and external system integrations. Build and optimize data access layers using Entity Framework Core and manage relational data in SQL Server. Ensure application security through authentication, authorization, and data protection using Azure AD. Deploy and manage environments using Docker, Kubernetes, and CI/CD pipelines. Write comprehensive unit and integration tests for both front-end (Vitest) and back-end (xUnit, Moq). Collaborate with cross-functional teams to maintain shared libraries and iterate based on user feedback. Troubleshoot, debug, and optimize applications for scalability and performance across the entire stack. Participate actively in code reviews, including reviewing and approving Pull Requests. Document progress, key decisions, and outcomes using Azure DevOps Boards and Wiki. Required Qualifications Strong professional experience in software engineering with modern web technologies. Proficiency in Angular 20+, ASP.NET Core (.NET 9+), and TypeScript/C#. Hands-on experience with Azure AD, MSAL, and secure application design. Solid understanding of Entity Framework Core, SQL Server, and relational data modeling. Experience with Docker, Kubernetes, and CI/CD workflows. Ability to write high-quality unit and integration tests. Strong analytical and problem-solving skills. Excellent communication skills and the ability to work effectively in a remote environment. What We Offer Fully remote work environment. Collaborative and supportive team culture. Opportunities for continuous learning and professional growth. Work with modern technologies and impactful enterprise projects.

🏢 Summary: B2B contract role for a Full-Stack Software Engineer to develop and maintain backend services in C#/.NET and frontend components in React within a dynamic, international project environment. The position involves building scalable solutions, integrating REST APIs, and supporting implementations with effective problem-solving. Remote work with long-term project engagement. 🗂️ Requirements: Proficiency in C# and .NET for scalable services development, Experience with React.js and React Query, Experience with Azure SQL and MS SQL, Experience building RESTful APIs with ASP.NET Core (OpenAPI), Knowledge of CI/CD processes and Agile methodologies, Experience with Azure DevOps or GitHub, English at minimum B2 level 📃 Skills: C#, .NET, React, ReactQuery, AzureSQL, MSSQL, REST, ASP.NET, OpenAPI, CI/CD, AzureDevOps, GitHub, Azure 🏢 Description: We are currently looking for a Full-Stack Software Engineer for our client, a world-leading provider of digital solutions and applications, with a particular focus on the energy, maritime, and healthcare markets. If working in a dynamic environment is something you’re comfortable with and you use the tech stack listed below on a daily basis, this opportunity is for you! Key responsibilities Developing advanced backend solutions in C# Creating and maintaining frontend components Preparing technical documentation Supporting implementations through quick and effective problem-solving Balancing changing priorities with ongoing development work Ideal candidate profile Proficient in .NET for building scalable services React.js, React Query Azure SQL, MS SQL RESTful APIs with ASP.NET Core (OpenAPI Standard) Knowledge of Agile methodologies and CI/CD processes (Azure DevOps, GitHub) English on B2 level nice to have: Experience with Azure (App Services, Azure Functions, Key Vault, Storage Accounts, Entra ID) Experience using AI-based development tools (Microsoft Copilot, GitHub Copilot) Conditions Employment Type: B2B contract Salary: Depends on your experience Work Model : Remote work model (possible 2–4 business trips per year to the office in Poland or Norway) Benefits : private medical care, sport card, life insurance Project duration: Project start March/April, with a duration of at least until the end of the year Recruitment steps Phone call with Recruiter Client interview Feedback and decision

🏢 Summary: Software Engineer role focused on building and maintaining scalable cloud-based applications with modern frontend technologies and DevSecOps practices. The position involves full software development lifecycle responsibilities, frontend architecture, observability, and collaboration with cross-functional teams in a hybrid work environment. Candidates should have strong experience with JavaScript/TypeScript, frontend frameworks, cloud concepts, and software engineering principles. 🗂️ Requirements: Bachelor's degree in Computer Science, Software Engineering, or related field, 5+ years of professional software development experience, JavaScript, TypeScript, React, Angular, Vue, HTML5, CSS3, Browser APIs, Accessibility, Cloud deployment concepts, Azure, Data structures, Algorithms, Software design principles, SQL, NoSQL, MSSQL, MySQL, MongoDB, GitHub, GitLab, DevSecOps, Frontend architecture, Problem-solving, Fluent English 📃 Skills: JavaScript, TypeScript, React, Angular, Vue, HTML5, CSS3, Azure, SQL, NoSQL, MSSQL, MySQL, MongoDB, GitHub, GitLab, Docker, Kubernetes, CI/CD, Scrum, Kanban 🏢 Description: Summary The Software Engineer will play a key role in designing, developing, and maintaining high-quality software solutions that meet the evolving needs of users and the business, while collaborating with cross-functional teams and contributing through the entire software development lifecycle. Main Responsibilities: Design, develop, test, deploy, and maintain robust, scalable, and high-performance software applications using cloud components. Develop reusable UI components and frontend architecture (design systems, state management, routing, bundling). Write clean, efficient, and well-documented code following best practices. Collaborate with product managers, UX/UI designers, and engineers to define, design, and ship new features. Debug and resolve technical issues, ensuring optimal application performance and reliability. Contribute to architectural discussions and decisions, shaping the future of the technical stack. Stay up-to-date with emerging technologies and industry trends to improve development processes and tools. Participate in code reviews, technical documentation, and continuous improvement of engineering standards. Apply DevSecOps practices: dependency management, vulnerability scanning, secrets handling, and secure coding. Establish observability for frontend applications (real-user monitoring, client-side logging, error tracking, performance monitoring). Identify and implement opportunities for automation and process improvements. Key Requirements: Bachelor's degree in Computer Science, Software Engineering, or related field, or equivalent practical experience. 5 years of professional experience in software development. Strong proficiency in JavaScript/TypeScript and modern frontend frameworks (React, Angular, or Vue). Strong understanding of web fundamentals: HTML5, CSS3, browser APIs, security basics, and accessibility. Familiarity with cloud deployment concepts (preferably Azure) and environment configuration. Solid understanding of data structures, algorithms, and software design principles. Experience with SQL and/or NoSQL databases (MSSQL, MySQL, MongoDB, etc.). Experience with version control systems (GitHub/GitLab). Strong problem-solving skills and ability to troubleshoot complex issues. Excellent communication and interpersonal skills. Ability to work independently and manage multiple priorities. Nice to Have: Experience with Docker and Kubernetes. Familiarity with CI/CD pipelines and GitHub actions/workflows. Experience with agile development methodologies (Scrum, Kanban). Proficiency with Agentic IDEs and "Agent in the loop" workflows. Experience in modern CSS architecture and ability to consistently implement design docs. Other Details: Location: Remote (hybrid model) Work Model: Hybrid (3 days in office/week) Work hours: CET Time zone (9 hours) Expected language skill: Fluent English

🏢 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: Senior Full-Stack Engineer role focused on designing and scaling AI-driven systems powered by LLMs for a virtual agent platform. The position involves building backend services, integrating external APIs, and owning architecture decisions for distributed, high-performance applications. You will contribute directly to LLM-based features, optimize system performance, and support real-time decision-making systems. 🗂️ Requirements: 5+ years of software engineering experience, Experience building production systems, Experience designing scalable distributed applications, Hands-on experience developing or integrating LLM-based products, Experience with RAG pipelines, custom agents, fine-tuning or orchestration frameworks, Strong Python experience, Solid understanding of Linux environments, Experience integrating multiple APIs, Ability to identify and resolve performance bottlenecks 📃 Skills: Python, LLM, RAG, LangChain, LlamaIndex, Linux, APIs, DistributedSystems, Microservices, Performance 🏢 Description: You’ll join as a Senior Full-Stack Engineer with hands-on experience building products powered by LLMs, contributing directly to the development of our AgentSee AI platform. RESPONSIBILITIES Design, build, and scale AI-driven systems that power our virtual agent capabilities (conversational reasoning, retrieval, and automation flows) Develop backend services and data pipelines that integrate multiple APIs (Amadeus, Sabre, internal systems) to support real-time decision-making Collaborate with other teams to ship LLM-based features that deliver measurable impact Own architecture decisions for distributed, high-performance AI applications Continuously improve model performance, reliability, and monitoring frameworks Help define our engineering best practices, guide technical decisions, and mentor other developers within the team REQUIREMENTS 5+ years of experience in software engineering, with a track record of building production systems Strong background in designing scalable, distributed applications 2 Proven hands-on experience developing or integrating products using LLMs (e.g., RAG pipelines, custom agents, fine-tuning, or orchestration frameworks like LangChain/LlamaIndex) Hands-on experience with Python Solid understanding of Linux runtime environments Skilled at identifying and solving performance bottlenecks Excellent collaboration skills with the ability to give and receive constructive feedback Fluent in English, with strong written and verbal communication Proactive, curious, and eager to keep learning NICE TO HAVE Experience with the travel industry (especially GDS APIs like Sabre, Amadeus, or Travelport) Hands-on with Kubernetes, AWS, Terraform, and CI/CD practices Contributions to open-source projects or notable side projects Familiarity with agile methodologies and collaborative product development WHAT DO WE OFFER ON THIS PROJECT? Employment directly through the client. Cooperation based on a B2B. 100% remote work. 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. Barbara KrawczykJunior IT Delivery Consultantbarbara.krawczyk@speedapp.pl+48 734 469 838

🏢 Summary: Senior Full-Stack Engineer role focused on designing and scaling AI-driven systems powered by LLMs for a virtual agent platform. The position involves building distributed backend services, integrating multiple APIs, and owning architectural decisions for high-performance AI applications. You will develop and optimize LLM-based features, ensuring reliability, scalability, and measurable business impact. 🗂️ Requirements: 5+ years of software engineering experience building production systems, Experience designing scalable distributed applications, Hands-on experience with LLMs (RAG, custom agents, fine-tuning, orchestration frameworks), Strong Python programming skills, Experience building backend services and data pipelines, Experience integrating external APIs, Solid understanding of Linux environments, Experience identifying and resolving performance bottlenecks, Fluent English communication skills 📃 Skills: Python, LLM, RAG, LangChain, LlamaIndex, Linux, API, Kubernetes, AWS, Terraform, CI/CD, Amadeus, Sabre 🏢 Description: You’ll join as a Senior Full-Stack Engineer with hands-on experience building products powered by LLMs, contributing directly to the development of our AgentSee AI platform. RESPONSIBILITIES Design, build, and scale AI-driven systems that power our virtual agent capabilities (conversational reasoning, retrieval, and automation flows) Develop backend services and data pipelines that integrate multiple APIs (Amadeus, Sabre, internal systems) to support real-time decision-making Collaborate with other teams to ship LLM-based features that deliver measurable impact Own architecture decisions for distributed, high-performance AI applications Continuously improve model performance, reliability, and monitoring frameworks Help define our engineering best practices, guide technical decisions, and mentor other developers within the team REQUIREMENTS 5+ years of experience in software engineering, with a track record of building production systems Strong background in designing scalable, distributed applications 2 Proven hands-on experience developing or integrating products using LLMs (e.g., RAG pipelines, custom agents, fine-tuning, or orchestration frameworks like LangChain/LlamaIndex) Hands-on experience with Python Solid understanding of Linux runtime environments Skilled at identifying and solving performance bottlenecks Excellent collaboration skills with the ability to give and receive constructive feedback Fluent in English, with strong written and verbal communication Proactive, curious, and eager to keep learning NICE TO HAVE Experience with the travel industry (especially GDS APIs like Sabre, Amadeus, or Travelport) Hands-on with Kubernetes, AWS, Terraform, and CI/CD practices Contributions to open-source projects or notable side projects Familiarity with agile methodologies and collaborative product development WHAT DO WE OFFER ON THIS PROJECT? Employment directly through the client. Cooperation based on a B2B. 100% remote work. 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. Barbara KrawczykJunior IT Delivery Consultantbarbara.krawczyk@speedapp.pl+48 734 469 838

🏢 Summary: Senior Software Engineer role focused on building scalable front-end and cloud-native applications, with flexibility for deep specialization in modern front-end technologies or AWS cloud engineering. The position involves designing serverless architectures, integrating APIs, managing databases, and implementing CI/CD pipelines in a collaborative environment. Regular on-site presence and strong English communication skills are required. 🗂️ Requirements: Minimum 8 years of commercial software development experience, Strong expertise in front-end development with component-based frameworks or AWS cloud engineering, Hands-on experience designing and delivering cloud-native applications, Experience with serverless architectures, Solid understanding of API design principles and distributed systems, Experience with CI/CD pipelines and deployment automation, Ability to communicate fluently in English, Availability for regular on-site work 📃 Skills: JavaScript, TypeScript, AWS, Serverless, REST, SQL, NoSQL, CI/CD, Docker, Kubernetes 🏢 Description: We are looking for a highly experienced Software Engineer with strong expertise in modern front-end technologies and cloud-based solutions. In this role, you will be responsible for designing and delivering scalable, high-quality applications in a highly collaborative and fast-paced environment. The position requires regular on-site presence and the ability to communicate effectively in English with both technical and non-technical stakeholders. Depending on your strengths, we welcome candidates with either deep front-end specialization or strong hands-on experience in cloud engineering, ideally combining both. Your tasks Develop and maintain applications using modern front-end technologies and strongly typed languages Design and implement scalable cloud-based architectures, including serverless solutions Build and integrate RESTful services to support application functionality Work with both relational and non-relational databases to manage and process data effectively Create and optimize automated deployment pipelines for continuous integration and delivery Collaborate with stakeholders to translate business requirements into technical solutions Requirements Minimum 8 years of commercial experience in software development using modern programming languages Strong hands-on expertise in either front-end development (including component-based frameworks) or cloud engineering (AWS) Practical experience designing and delivering cloud-native applications, preferably in a serverless environment Solid understanding of API design principles and best practices for distributed systems Experience working with CI/CD pipelines and deployment automation tools Excellent communication skills with the ability to explain technical concepts clearly, and fluency in English 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: B2B contract role for a Senior Frontend Developer to architect and build advanced single-page applications in the banking domain. The position focuses on frontend architecture, performance optimization, and integration with backend services using modern web technologies. Hybrid work model with collaboration across cross-functional teams. 🗂️ Requirements: Strong experience with HTML, Strong experience with CSS, Strong experience with JavaScript, Strong experience with TypeScript, Hands-on experience with Web Components, Hands-on experience with Lit, Good knowledge of Node.js, Knowledge of npm ecosystem, Experience with Vitest or similar testing frameworks, Experience integrating REST APIs, Experience integrating GraphQL APIs 📃 Skills: HTML, CSS, JavaScript, TypeScript, WebComponents, Lit, Node.js, npm, Vitest, REST, GraphQL 🏢 Description: We are looking for a Senior Frontend Developer for our client in the banking industry RESPONSIBILITIES Architect and implement advanced user interfaces and single-page applications using TypeScript and JavaScript Define and promote best practices for frontend architecture, state management and reusable components Optimize application performance, including load times and Core Web Vitals, ensuring smooth user experience across devices Collaborate closely with backend developers, UX/UI designers, and product managers Integrate frontend applications with REST and GraphQL APIs Ensure code quality through testing and participation in development lifecycle processes REQUIREMENTS Strong experience with HTML, CSS, JavaScript, and TypeScript Hands-on experience with Web Components / Lit Good knowledge of Node.js and npm ecosystem Experience with testing frameworks such as Vitest NICE TO HAVE Experience with CI/CD pipelines Familiarity with Kafka Knowledge of NinjaFork Experience working with messaging systems (MQ) WHAT DO WE OFFER ON THIS PROJECT? Cooperation based on a B2B contract and rate: 110-120 PLN/hour Hybrid work from Warsaw / Łódź / Gdynia / Gdańsk (3 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.