Backend Developer (Node.js, .NET, AWS)

🏢 Summary: Backend Developer role focused on modernizing and transforming legacy sales systems using Node.js and .NET technologies. The position involves building and maintaining APIs, databases, and event-driven architectures within AWS, while supporting deployment and continuous improvement processes. The role emphasizes proactive development, high-quality testable code, and collaboration on large-scale backend initiatives. 🗂️ Requirements: 5-6 years experience with Node.js, 2-3 years experience with .NET, Strong proficiency in TypeScript and JavaScript, Experience building and maintaining APIs, Experience with PostgreSQL and DynamoDB, Experience with event-driven architecture, Experience with AWS services, Ability to write modern, testable, high-quality code, Experience with CI/CD pipelines, Experience maintaining and modernizing legacy systems 📃 Skills: Node.js, TypeScript, JavaScript, .NET, AWS, Lambda, DynamoDB, PostgreSQL, RDS, ECS, Kafka, EventBridge, CDK, GitLab, CI, Docker, Localstack 🏢 Description: We're seeking an experienced & energetic Backend Developer specializing in TypeScript/JavaScript/.NET to enhance the global Sales ecosystem. This role focuses on transforming backend systems, emphasizing proactive development and team empowerment. Candidates should bring a blend of Node.js and .NET expertise to the table, along with a collaborative spirit and a commitment to writing modern, testable code. Our Client’s team, comprising about 25 individuals, is modernizing legacy systems to fulfill local market needs while improving our processes continually. If you're motivated by challenges and have a passion for creating high-value solutions, we want to hear from you! Main Responsibilities: Drive initiatives and collaborate with team members on larger projects. Fix bugs and implement smaller enhancements across the application. Participate in creating and maintaining APIs using AWS services. Develop and improve databases with a focus on PostgreSQL and DynamoDB. Contribute to an event-driven architecture utilizing Kafka and AWS EventBridge. Manage deployment processes using AWS CDK and GitLab CI. Support legacy system maintenance and modernization. Key Requirements: At least 5-6 years of experience as a Node.js Developer. 2-3 years of experience with .NET. Energetic and inspiring personality who thrives on challenges. Hands-on work ethic in collaboration with team members. Proficiency in writing modern, testable, and high-quality code. Natural inclination towards evolutive maintenance. Nice to Have: AWS experience (Serverless Lambda, DynamoDB, RDS, ECS, AWS CDK). Knowledge of Localstack. Experience with Docker. Other Details: This position allows for team activities at least twice per year in Sweden, with a focus on modernizing our legacy systems into proactive, quality-focused solutions. Join a team of about 25 members dedicated to driving transformative change in our sales ecosystem.

🏢 Summary: Full-time Backend Developer role focused on building and maintaining scalable Node.js and TypeScript applications for US clients across various industries, including MVP-stage products. The position involves designing backend architecture, working with SQL/NoSQL databases, and collaborating in Scrum teams in a flexible, remote-first environment. The offer includes long-term cooperation and participation in diverse, technically challenging projects. 🗂️ Requirements: 2+ years commercial experience in Node.js, Experience with Node.js frameworks (Express.js, NestJS or similar), Strong proficiency in TypeScript, Experience with SQL databases, Experience with NoSQL databases, Knowledge of SOLID and KISS principles, Knowledge of design and architecture patterns, Experience with Docker, Experience with GitHub Actions, Basic experience with AWS services, Ability to use ORM or query builders (e.g. Prisma, Knex), English level B2, Polish level C1 📃 Skills: Node.js, TypeScript, JavaScript, Express, NestJS, Fastify, SQL, NoSQL, Prisma, Knex, Docker, AWS, GitHub, GitHubActions, React 🏢 Description: We are looking for skillful Backend Developers to join one of our teams working with US clients - referrals from the high-end American IT market. Our tech stack is built around React, Node.js and TypeScript. We are working with well-established companies and sometimes startups in their early stages (MVPs), which makes the job full of diversity and exciting challenges while crafting cutting-edge solutions. Enjoy the flexibility of working within the Polish time zone and collaborate with clients from diverse industries such as FinTech, SportsTech, MedTech, and many others. Required skills: 2+ years of commercial experience in Node.js, SQL and NoSQL DBs, knowledge of JS frameworks (e.g Express.js, NestJS), experience in TypeScript, SOLID and KISS, knowledge about design and architecture patterns, know how and why Docker and GitHub Actions works, basic usage of AWS services, English B2, Polish C1 Offer: B2B/UZL, paid days off, 100% remote (or hybrid/onsite - as you prefer), Polish time zone, flexible hours, full-time position, long-term contract, Scrum Teams Perks and Benefits: Budgets for self-development, integrations, healthcare & sport activities, Mentoring Program, Individual Career Path, Paid Time Off, Paid Health Break & more Tools you'll use: Apple MacBook Pro, Slack, GSuite, GitHub, Jira, Coda, FigJam Your future tasks and duties: Writing readable and easy-to-maintain JS/TS code with OOP flavor Writing documentation for delivered code Code review of other developers in the team Direct involvement with the design and modification of basic DB structures Propose improvements and share proactive ideas/solutions with the team to enhance the team's work processes Share insights with the team to diagnose issues and focus on solutions Actively participate in project discussions Listen to the client's needs and, after consulting the team, suggest solutions Support less experienced team members About you - Tech skills & Experience: 2+ years of commercial experience in Node.js Good experience with at least one Node.js backend framework (e.g. Express.js, NestJS, Fastify, etc) - you know most of its basic APIs/features, worked on at least 1-2 projects involving such technologies Strong proficiency in TypeScript. You have practical experience with static typing, advanced types, and configuring TS compilers, treating it as your primary language to build robust and type-safe backend applications Potentially worked with NoSQL databases and/or in-memory databases and utilized them as a data store Worked with SQL databases (integration-wise and as a basic design skill) with ORM or query builder tool (ie. Prisma, Knex) Knows the basics of building AI applications (RAG, Agents, etc.) Use AI effectively in their work About you - Soft Skills: English level B2 to cooperate with American clients Polish level C1 to communicate easily within the team Open-minded to new challenges (e.g. different frameworks) Understand the significance of MVP and prioritize the pursuit of excellence and high-quality outcomes, even amid tight project timelines. Communicate with the team to efficiently translate business complexities (user stories/tasks) into solutions (results/estimations) Staying on top with trends/news, sharing them, teaching others and aiming for the best quality solutions Strong problem-solving abilities to diagnose issues, suggest solutions, and make decisions based on project requirements Nice to have: Worked in Agile/Scrum on a daily basis consisting of people with similar skills and monitoring code quality on a daily basis Basic experience with AWS - used some services in specific cases Basic experience with Docker - know how to prepare and debug the environment and connect things up to work locally Worked in the very beginning of the product development/creation stage Understand the significance of MVP and aim to deliver top-notch results, even amid tight project timelines Recruitment process: CV Review Phone call with our Recruiter (15min) Soft-skills interview with our Recruiter (1h) Technical interview with our Specialists (2h) Decision and feedback 🥳 Meaningful projects, top-notch experts and value-driven workplace Sound good? Apply now!

🏢 Summary: B2B contract role for a Mid/Senior Node.js Developer focused on building and maintaining backend systems such as SaaS platforms, cloud-native applications, microservices, and event-driven architectures. The position involves architectural decision-making, backend development, and close collaboration with QA and DevOps in international projects. Candidates will work with modern cloud environments and have real impact on system design and product development. 🗂️ Requirements: 4+ years of backend development experience, Strong knowledge of Node.js, Experience with TypeScript or JavaScript, Experience with SQL databases, Experience with NoSQL databases, Understanding of microservices architecture, Understanding of serverless architecture, Understanding of event-driven systems, Hands-on experience with GCP, AWS, or Azure, Ability to write clean and maintainable code, Experience with unit and integration testing, English level minimum B2 📃 Skills: Node.js, TypeScript, JavaScript, SQL, NoSQL, GCP, AWS, Azure, REST, Docker, Microservices, Serverless, Testing 🏢 Description: We are a software house delivering long-term projects for international clients , and we are looking for Mid / Senior Node.js Developers to join our team on a B2B contract . You will work on various backend-focused projects , such as SaaS platforms, cloud-native systems, microservices, and event-driven architectures. We match projects to your experience and technical preferences, and you will have a real impact on architecture and product development. Responsibilities design, develop, and maintain backend services using Node.js (TypeScript / JavaScript) implement new features and improve existing functionalities participate in technical and architectural decision-making refactor and optimize key components of the system ensure code quality through clean code practices and testing collaborate closely with developers, QA, and DevOps engineers Requirements 4+ years of experience in backend development strong knowledge of Node.js (TypeScript / JavaScript) experience with SQL and NoSQL databases good understanding of cloud-based architectures (microservices, serverless, event-driven systems) hands-on experience with at least one cloud provider ( GCP, AWS, or Azure ) ability to write clean, well-structured, and maintainable code proactive mindset and willingness to grow technically good communication skills and English level min. B2B Example Tech Stack (depends on the project) Node.js / TypeScript Cloud platforms: GCP, Azure or AWS REST APIs & asynchronous communication SQL & NoSQL databases Docker Unit and integration testing

🏢 Summary: Remote Senior Backend Node.js Developer role focused on building and scaling an event-driven microservices trading platform. The position involves end-to-end development, collaborating across product, QA, and DevOps to deliver high-performance, scalable trading solutions. B2B contract with overlap required with NYC working hours. 🗂️ Requirements: Bachelor’s Degree in Computer Science or related field, 3-5 years professional web application development experience, Expert-level Node.js knowledge, Expert-level TypeScript knowledge, Experience with distributed systems, Experience with Apache Kafka, Redis, Kubernetes, MongoDB, Experience with automated unit testing and TDD, Strong understanding of performance optimization and computational complexity, Knowledge of algorithms and design patterns, Fluent English (written and spoken) 📃 Skills: Node.js, TypeScript, Kafka, Redis, Kubernetes, MongoDB, Microservices, TDD, Algorithms, DesignPatterns, Web, DistributedSystems 🏢 Description: We are looking for a performance-driven backend Senior Node.js Developer who can help us bring our client's trading solutions to the next level of functionality, scalability, and user experience. They are actively developing a new event-driven microservices architecture to form a foundational platform for delivering new trading applications. You will be responsible for delivering software end-to-end , from liaising with product managers and designers, to coordinating across international development teams on engineering and architecture to working with QA and DevOps teams - all ultimately to deliver a quality, innovative product to the traders and investors who depend on the platform every day. Requirements: Fluent English language [both written and spoken] Education: at least Bachelor's Degree, preferably in Computer Science 3-5 years' professional web application development experience Expert-level Node.js and TypeScript knowledge, and curiosity to learn more Broad knowledge of web platform and technologies Superior analytical and problem-solving ability Effective communication skills to work with different teams across an international company Experience with modern distributed systems and infrastructure technologies, including Apache Kafka, Redis, Kubernetes, and MongoDB Automated unit testing and test-driven development Robust understanding of performance issues, computational complexity, and code optimization. Familiarity and implementation of industry-standard algorithms and design patterns Proactive and team player who can deliver in a high-pressure demanding environment Nest.js – nice to have Offer details: 100% remote job preferrably at least 4-5 hours overlap with NYC working hours B2B contract rate up to 50 USD/h net Don't hesitate and apply now!

🏢 Summary: Backend-focused Node.js Developer role for building scalable IoT management systems, e-commerce platforms, and AI-based modules. The position involves full software development lifecycle participation with strong emphasis on AWS-based cloud architecture and API development. Opportunity to optionally expand into React/Next.js within an Agile international team. 🗂️ Requirements: 3-5 years commercial backend development experience, Strong proficiency in Node.js, Strong proficiency in TypeScript, Experience with Express, Practical experience with AWS services (EC2, Lambda, S3, SQS, SNS), Experience designing and developing APIs, Experience with MongoDB, Proficiency with Git, Knowledge of DevOps practices, Experience with CI/CD pipelines, English proficiency for daily communication 📃 Skills: Node.js, TypeScript, Express, AWS, S3, Lambda, EC2, SNS, SQS, MongoDB, Git, CICD, React, Next.js, Agile, Scrum 🏢 Description: Dla naszego klienta poszukujemy kandydatów na stanowisko: Node.js Developer with AWS Projekt: 🚀 Rozwój innowacyjnych systemów z obszaru IoT do zarządzania urządzeniami elektronicznymi w przestrzeniach komercyjnych, a także tworzenie platform e-commerce i zaawansowanych modułów bazujących na sztucznej inteligencji ( m.in . rozpoznawanie obrazu) oraz narzędzi automatyzujących procesy QA. Stack technologiczny: 💻 Backend (Główny focus): Node.js, TypeScript, Express, ekosystem AWS (S3, Lambda, EC2, SNS, SQS), MongoDB Frontend (Mile widziane / Do nauki): React.js, Next.js Narzędzia: Git, CI/CD Zespół: 👥 Międzynarodowe grono specjalistów (ok. 8-9 osób), budowane dla stabilnej firmy technologicznej z korzeniami w Niemczech. Współpraca opiera się na płaskiej strukturze i dużej otwartości, a w codziennej pracy wspierać Cię będą doświadczeni liderzy techniczni oraz eksperci front-end (od których będziesz mógł/mogła się uczyć, jeśli zechcesz rozwijać się w tym kierunku!). Metodyka pracy: 🔄 Agile / SCRUM Model współpracy: 🏢 Praca hybrydowa z biura w Warszawie (2 dni z biura, 3 dni pracy zdalnej) Stawka: 💰 do 15000 zł brutto miesięcznie (UoP) Zakres obowiązków: 🛠️ Aktywne uczestnictwo w pełnym cyklu powstawania oprogramowania, ze szczególnym uwzględnieniem warstwy backendowej – od fazy koncepcyjnej, przez architekturę, aż po wdrożenie i testowanie. Tworzenie, rozwój i utrzymanie skalowalnych rozwiązań serwerowych oraz API przy ścisłej współpracy z resztą międzynarodowego zespołu. Dla chętnych: Możliwość zaangażowania się w zadania frontendowe i płynna nauka technologii takich jak React czy Next.js w praktyce. Analiza wymagań, estymacja zadań oraz proponowanie nowych narzędzi lub bibliotek. Dbanie o najwyższą wydajność, niezawodność i jakość tworzonego kodu. Rozwiązywanie złożonych problemów inżynieryjnych. Przekładanie technicznych zawiłości na język zrozumiały dla nietechnicznych współpracowników. Oczekujemy: 🎯 Około 3-5 lat komercyjnego doświadczenia w tworzeniu oprogramowania ze szczególnym naciskiem na środowisko backendowe . Biegłości w pracy z technologiami: Node.js, TypeScript oraz Express . Praktycznego doświadczenia w korzystaniu z usług chmurowych AWS (w tym m.in . EC2, Lambda, SQS, S3). Umiejętności projektowania API oraz dobrej znajomości baz danych ( MongoDB ). Biegłości w korzystaniu z systemów kontroli wersji (Git) oraz znajomości praktyk DevOps i procesów CI/CD. Dobrej znajomości języka angielskiego (niezbędna do codziennej komunikacji w zespole). Samodzielności, umiejętności świetnej pracy zespołowej i dbałości o detale. 🌟 Mile widziane: Podstawowa znajomość technologii frontendowych (React.js, Next.js) LUB otwartość i chęć ich nauki w trakcie trwania projektu. Oferujemy: ✨ Przestrzeń do nauki Frontendu: Jeśli chcesz poszerzyć swoje kompetencje o React.js / Next.js, nasi eksperci z przyjemnością wdrożą Cię w te technologie. Zatrudnienie w oparciu o Umowę o Pracę. Prywatną opiekę medyczną (z opcją rozszerzenia pakietu dla bliskich). Dofinansowanie do zajęć sportowych oraz możliwość skorzystania z ubezpieczenia na życie. Kartę lunchową (zasilaną co miesiąc) po zakończeniu okresu próbnego. Elastyczne godziny rozpoczynania pracy (pomiędzy 8:00 a 10:00) i duże zrozumienie dla prywatnych spraw w ciągu dnia. Środowisko stawiające na "learning by doing" z szerokim dostępem do materiałów edukacyjnych i platform szkoleniowych (np. Udemy). Proces rekrutacyjny: 🤝 Rozmowa wprowadzająca: weryfikacja dopasowania do projektu oraz swobody komunikacji w języku angielskim. Wyzwanie techniczne (take-home assignment): praktyczne zadanie programistyczne (skupione głównie na Twoich umiejętnościach backendowych) do wykonania w dogodnym czasie (masz na to 7 dni). O nas Next Technology Professionals to wyspecjalizowana agencja rekrutacyjna i firma outsourcingowa o silnym profilu technologicznym. Od ponad 10 lat wspieramy firmy w budowie zespołów IT, AI, Cybersecurity, SAP oraz w rekrutacjach dla finansów, inżynierii i marketingu. Zrealizowaliśmy ponad 1000 skutecznych procesów rekrutacyjnych dla korporacji, scale-upów i dynamicznie rosnących startupów. Przesyłając swoje CV do Next Technology Professionals, trafiasz do starannie wyselekcjonowanej bazy kandydatów realizujących projekty dla wiodących globalnych organizacji. Pracujemy wyłącznie w oparciu o aktualne, konkretne potrzeby klientów. Jeśli Twój profil będzie odpowiadał jednemu z prowadzonych procesów, skontaktujemy się niezwłocznie.

🏢 Summary: Senior Backend Developer role focused on developing and optimizing a key internal system using NestJS, Node.js, and TypeScript. The position involves full software development lifecycle ownership and automation of CI/CD processes. Strong emphasis on testing, database management, and deployment automation. 🗂️ Requirements: 7+ years commercial backend development experience, 5+ years experience with NestJS, Node.js, TypeScript, Experience in full software development lifecycle, Experience with CI/CD and GitHub Actions, Proficiency with PostgreSQL, Experience with TypeORM, Docker, Jest, Ability to write integration and E2E tests, Knowledge of coding best practices 📃 Skills: NestJS, Node.js, TypeScript, CI/CD, GitHub, PostgreSQL, TypeORM, Docker, Jest, RabbitMQ, Sentry, Zod, class-validator, Testcontainers, OpenAPI, Swagger 🏢 Description: Szukamy Backend Developera , który pomoże nam rozwijać i optymalizować kluczowy system wewnętrzny firmy. Jeśli masz silne doświadczenie w NestJS, Node.js i TypeScript , a do tego dobrze odnajdujesz się w środowisku CI/CD i automatyzacji wdrożeń, to jesteś osobą, której szukamy! ✅ Wymagania 🔹 Senior 7+ lat doświadczenia w komercyjnym tworzeniu aplikacji backendowych 🔹 Senior 5+ lat pracy z NestJS, TypeScript i Node.js 🔹 Doświadczenie w pełnym cyklu wytwarzania oprogramowania – od planowania po stabilizację po wdrożeniu 🔹 Doświadczenie w automatyzacji procesów wdrożeniowych (Github Actions, CI/CD) 🔹 Biegłość w pracy z bazami danych PostgreSQL 🔹 Znajomość TypeORM, Docker i Jest 🔹 Umiejętność pisania testów integracyjnych oraz testów E2E 🔹 Znajomość dobrych praktyk kodowania i umiejętność pracy zespołowej 🌟 Mile widziane 🔸 Doświadczenie z RabbitMQ lub innymi systemami kolejkowania wiadomości 🔸 Znajomość narzędzi monitoringu i error tracking (np. Sentry) 🔸 Doświadczenie z walidacją danych (Zod, class-validator) 🔸 Znajomość Testcontainers lub podobnych narzędzi do testów integracyjnych 🔸 Doświadczenie z OpenAPI/Swagger

🏢 Summary: Senior Backend Node.js Developer role focused on building and scaling an event-driven microservices trading platform. The position involves end-to-end development within a distributed architecture, ensuring high performance, scalability, and code quality. Fully remote B2B contract with overlap with NYC hours. 🗂️ Requirements: 4+ years web application development experience, Expert knowledge of Node.js, Expert knowledge of TypeScript, Experience with distributed systems architecture, Experience with Apache Kafka, Experience with Redis, Experience with Kubernetes, Experience with MongoDB, Experience with automated unit testing and TDD, Strong understanding of performance optimization and computational complexity, Knowledge of algorithms and design patterns, Broad knowledge of web technologies 📃 Skills: Node.js, TypeScript, Kafka, Redis, Kubernetes, MongoDB, Microservices, TDD, Algorithms, DesignPatterns, Web 🏢 Description: We are looking for a performance-driven backend Senior Node.js Developer who can help us bring our client's trading solutions to the next level of functionality, scalability, and user experience. They are actively developing a new event-driven microservices architecture to form a foundational platform for delivering new trading applications. You will be responsible for delivering software end-to-end , from liaising with product managers and designers, to coordinating across international development teams on engineering and architecture to working with QA and DevOps teams - all ultimately to deliver a quality, innovative product to the traders and investors who depend on the platform every day. Requirements: Fluent English language [both written and spoken] Education: at least Bachelor's Degree, preferably in Computer Science 4+ years' professional web application development experience Expert-level Node.js and TypeScript knowledge, and curiosity to learn more Broad knowledge of web platform and technologies Superior analytical and problem-solving ability Effective communication skills to work with different teams across an international company Experience with modern distributed systems and infrastructure technologies, including Apache Kafka, Redis, Kubernetes, and MongoDB Automated unit testing and test-driven development Robust understanding of performance issues, computational complexity, and code optimization. Familiarity and implementation of industry-standard algorithms and design patterns Proactive and team player who can deliver in a high-pressure demanding environment Nest.js – nice to have Offer details: 100% remote job preferrably at least 4-5 hours overlap with NYC working hours B2B contract rate up to 55 USD/h net

🏢 Summary: Senior Backend Engineer role focused on designing and delivering scalable, production-ready software using Node.js and AWS. The position involves leading development of complex solutions, ensuring high performance, reliability, and security, and integrating monitoring and testing practices. The engineer collaborates in agile teams to translate product requirements into resilient cloud-based applications. 🗂️ Requirements: Strong experience with Node.js and TypeScript, Proficiency with AWS services (Lambda, SNS/SQS, API Gateway, CDK), Experience with TDD and QA best practices, Ability to design and build highly scalable applications, Experience with monitoring, performance, scalability, and security, Experience conducting code reviews and delivering production-ready code, Ability to integrate monitoring and support tools, Experience contributing to test frameworks 📃 Skills: Node.js, TypeScript, AWS, Lambda, SNS, SQS, API Gateway, CDK, TDD, QA, Monitoring, Scalability, Security, Agile 🏢 Description: We are looking for a Senior Backend Engineer (Node.js / AWS) who: Has strong experience with TDD and solid understanding of QA best practices. Can handle operational challenges : monitoring, performance, scalability, availability, resilience, and security. Translates product requirements into reliable, scalable software . Has excellent development skills and experience building highly scalable applications . Is proficient in Node.js, TypeScript , and AWS services like Lambda, SNS/SQS, API Gateway , and CDK . What you’ll do: Lead development of complex software solutions. Conduct code reviews and deliver production-ready code . Integrate software with monitoring/support tools . Collaborate with architects and technical leads, participate in agile processes . Contribute to test frameworks , troubleshoot issues, and ensure smooth team collaboration.

🏢 Summary: Senior Backend Engineer role focused on designing, building, deploying, and maintaining scalable backend systems using TypeScript and Node.js in a cloud environment. The position involves developing microservices on AWS, shaping system architecture across platforms, and ensuring production reliability for international users. Strong emphasis on clean architecture, testing, and infrastructure as code. 🗂️ Requirements: 5+ years backend development experience in production environments, Expert hands-on experience with TypeScript and Node.js, Strong knowledge of software engineering principles, testing, data structures, and algorithms, Experience designing and developing REST APIs, Experience with event-driven architecture, Experience building and maintaining microservices, Hands-on experience with AWS cloud services, Experience with Infrastructure as Code using Terraform, Experience with CI/CD pipelines and related tools, Strong knowledge of PostgreSQL and DynamoDB, Proficiency in OO design patterns, SOLID principles, and Clean Code, Computer Science degree, Experience working with Agile methodologies such as SCRUM or Kanban 📃 Skills: TypeScript, JavaScript, Node.js, AWS, Terraform, CircleCI, Docker, Datadog, PostgreSQL, DynamoDB, REST, CICD, Microservices, OOP, SOLID, Algorithms, DataStructures, SCRUM, Kanban 🏢 Description: About the role You will need to be an expert in backend development with a thorough understanding of the technologies involved. Strong backend skills where you can demonstrate your ability to apply these technologies, as well as deploy and maintain them will be crucial to success. Technologies we work with: Typescript, JavaScript, Node.js, REST APIs, AWS, Terraform Responsibilities: Designing, writing, testing functionalities for a backend system written in TypeScript, Node.js Deploying and maintaining microservices in AWS using Terraform Design software architecture between backend, frontend and mobile apps Maintaining system on production used by consumers from several European countries Debugging issues Scoping and assessing the complexity of features Participating in sprint planning, daily sprints and meetings with product owners for grooming new features Recruiting and mentoring team members Collaborating with other team members and teams that depend on the functionalities that you develop Required qualifications: 5+ years of production software development experience in backend Strong understanding of software engineering principles, testing, data structures and algorithms Expert hands-on experience in technologies such as Typescript / Node.js Experience in developing Cloud and Infrastructure solutions with AWS and CI/CD processes supported by tools like Terraform, CircleCI, Docker, Datadog, etc. Strong knowledge of DBMS like PostgreSQL, DynamoDB Expertise in REST APIs, Experience in event driven architecture Proficiency in OO design patterns, SOLID principles, Clean Code and solving architectural problems Computer Science degree Experience working with Agile methodologies such as SCRUM and/or Kanban Good communication and collaboration skills Self-motivation, proactive attitude Proficiency in English Nice to have: Exposure to frontend development in React Working experience with one of the object-oriented and/or functional languages such as C#, Python Java, Golang, Kotlin

🏢 Summary: Backend Developer (.NET) role focused on development, maintenance, and modernization of an existing logistics system. The position involves working with legacy code, fixing bugs, refactoring, and improving business logic within a live operational environment. The role requires close collaboration with development and analytics teams. 🗂️ Requirements: 3–5 years of experience with .NET, Proficiency in C#, Experience with ASP.NET MVC or ASP.NET Core, Strong knowledge of SQL Server, Experience working with legacy codebases, Ability to debug and analyze complex issues, Experience with REST API, English level B2 minimum 📃 Skills: .NET, C#, ASP.NET, MVC, Core, SQL, SQLServer, REST, EntityFramework, Docker, UnitTesting 🏢 Description: Organizacja z branży logistycznej, rozwijająca własne systemy operacyjne, poszukuje osoby na stanowisko Backend Developer (.NET). Rola skupiona jest na rozwoju i stabilizacji istniejącego systemu oraz stopniowym jego unowocześnianiu. Zakres obowiązków Rozwój i utrzymanie systemu w technologii .NET Analiza i rozwiązywanie błędów w systemie (bugfixy) Refaktoryzacja istniejącego kodu Analiza logiki biznesowej i jej usprawnianie Współpraca z zespołem developerskim i analitycznym Praca z kodem bez pełnej dokumentacji Wymagania Min. 3–5 lat doświadczenia w .NET Dobra znajomość: C# ASP.NET (MVC / Core) SQL Server Doświadczenie w pracy z istniejącym kodem (legacy) Umiejętność debugowania i analizy problemów Znajomość REST API Znajomość języka angielskiego na poziomie minimum B2 Mile widziane Entity Framework (klasyczny i Core) Podstawy testów jednostkowych Znajomość Docker Oferujemy Pracę przy systemach o realnym wpływie na operacje biznesowe Możliwość rozwoju technologicznego Stabilne zatrudnienie Wpływ na jakość i rozwój systemu