Senior C# Engineer (AWS)

🏢 Summary: Backend Software Engineer role focused on building, testing, and maintaining C#/.NET-based backend systems and microservices. The position involves designing system architecture, developing REST/GraphQL APIs, and ensuring reliable CI/CD-driven deployments. You will work on scalable systems used across multiple European markets. 🗂️ Requirements: 5+ years of commercial experience in C# development, Strong experience with .NET Core and .NET Framework, Solid knowledge of data structures and algorithms, Strong understanding of software engineering principles and testing, Experience with PostgreSQL, MSSQL, or DynamoDB, Experience designing and implementing REST or GraphQL APIs, Hands-on experience with CI/CD processes, Knowledge of OOP, SOLID principles, and Clean Code, Experience designing software architecture for distributed systems 📃 Skills: C#, .NETCore, .NETFramework, TypeScript, REST, GraphQL, PostgreSQL, MSSQL, DynamoDB, CICD 🏢 Description: About the role You will need to be proficient in C# backend development with a thorough understanding of the .NET 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: C#, .NET Core, .NET Framework, TypeScript, JavaScript, Python, Node.js, REST/GraphQL APIs, React, AWS, Terraform Responsibilities Designing, writing, testing functionalities for a backend system written in C# Design software architecture between backend, frontend and mobile apps Deploying and maintaining microservices in AWS using Terraform Debugging and maintaining system on production used by consumers from several European countries Scoping and assessing the complexity of features Participating in sprint planning, daily sprints and meetings with product owners for grooming new features Collaborating with other team members and teams who depend on functionalities that you develop Recruiting and mentoring new team members Required qualifications 5+ years of production software development experience in C# engineer role Solid hands-on experience in .NET Core and .NET Framework technologies Experience in working with AWS and Terraform / CloudFormation Strong knowledge of DBMS like MS SQL / PostgreSQL / DynamoDB Expertise of REST APIs Strong hands-on experience of CI&CD processes Proficiency in OO design patterns, SOLID principles, Clean Code and solving architectural problems Computer Science degree AI Tooling usage Able to work with Agile methodologies such as SCRUM and/or Kanban Good communication and collaboration skills Self-motivation, proactive attitude Proficiency in English Nice to have Experience in developing Cloud and Infrastructure solutions with AWS and CI/CD processes supported by tools like Docker, Kubernetes, Jenkins, Terraform, CircleCI, GitlabCI, Datadog, etc. Exposure to frontend development in React Working experience with one of the object-oriented and/or functional languages such as Java, TypeScript, Elixir, C++, Golang, Erlang, Python, Kotlin

🏢 Summary: Full-stack C#/.NET engineer role focused on building, deploying, and maintaining backend microservices and modern frontend applications in React or Angular. The position involves designing system architecture, developing REST APIs, and managing cloud infrastructure on AWS using Terraform. You will work on production systems used across multiple European countries within an Agile environment. 🗂️ Requirements: 5+ years production experience as C# engineer, Strong frontend experience with React or Angular, Hands-on experience with .NET Core and .NET Framework, Experience with AWS and Terraform or CloudFormation, Experience with MS SQL, PostgreSQL, or DynamoDB, Expertise in REST APIs, Strong experience with CI/CD processes, Knowledge of OOP, SOLID principles, Clean Code, Experience in software architecture design, Computer Science degree, Experience with AI tooling, Experience working in Agile (SCRUM or Kanban) 📃 Skills: C#, .NET, .NETCore, TypeScript, JavaScript, Node.js, REST, React, Angular, AWS, Terraform, CloudFormation, MSSQL, PostgreSQL, DynamoDB, CICD, OOP, SOLID, CleanCode, Microservices, SCRUM, Kanban 🏢 Description: About the role You will need to be proficient in backend and frontend development with a thorough understanding of the technologies involved. Strong backend and frontend 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: C#, .NET Core, .NET Framework, Typescript, JavaScript, Node.js, REST APIs, React, Angular, AWS, Terraform Responsibilities: Designing, writing, testing functionalities for a backend system written in C# and a frontend system written in React or Angular & TypeScript Design software architecture between backend, frontend and mobile apps Deploying and maintaining microservices in AWS using Terraform 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 Collaborating with other team members and teams who depend on functionalities that you develop Recruiting and mentoring new team members Required qualifications: 5+ years of production software development experience in C# engineer role Exposure and experience in frontend development in React or Angular frameworks Solid hands-on experience in .NET Core and .NET Framework technologies Experience in working with AWS and Terraform / CloudFormation Strong knowledge of DBMS like MS SQL / PostgreSQL / DynamoDB Expertise of REST APIs Strong hands-on experience of CI&CD processes Proficiency in OO design patterns, SOLID principles, Clean Code and solving architectural problems Computer Science degree AI Tooling usage Able to work with Agile methodologies such as SCRUM and/or Kanban Good communication and collaboration skills Self-motivation, proactive attitude Proficiency in English Nice to have: Working experience with one of the object-oriented and/or functional languages such as Java, Elixir, C++, Golang, Erlang, Python, Kotlin.

🏢 Summary: Full-stack C#/.NET engineer role focused on building, testing, deploying and maintaining backend microservices and frontend applications using React or Angular. The position involves working with AWS and Terraform, maintaining production systems, and collaborating in Agile teams to deliver new features. Strong emphasis on software engineering principles and modern cloud-based architectures. 🗂️ Requirements: 3+ years commercial experience in C# development, .NET Core and .NET Framework experience, Frontend development with React or Angular and TypeScript, Experience with REST APIs, Knowledge of MS SQL, PostgreSQL or DynamoDB, Understanding of OOP, SOLID and Clean Code principles, Experience with microservices architecture, AWS and Terraform experience, Knowledge of testing, data structures and algorithms, Computer Science degree, Experience with Agile (SCRUM or Kanban), AI tooling usage 📃 Skills: C#, .NET, .NETCore, .NETFramework, TypeScript, JavaScript, Node.js, React, Angular, REST, AWS, Terraform, MSSQL, PostgreSQL, DynamoDB, Microservices, Docker, Kubernetes, Jenkins, CircleCI, GitlabCI, Datadog, CICD 🏢 Description: About the role You will need to be proficient in backend and frontend development with a thorough understanding of the technologies involved. Strong backend and frontend 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: C#, .NET Core, .NET Framework, Typescript, JavaScript, Node.js, React, REST APIs, React, Angular, AWS, Terraform Responsibilities: Designing, writing, testing functionalities for a backend system written in C# and a frontend system written in React or Angular & TypeScript Deploying and maintaining microservices in AWS using Terraform Maintaining system on production used by consumers from several European countries Debugging issues Participating in sprint planning, daily sprints and meetings with product owners for grooming new features Collaborating with other team members and teams who depend on functionalities that you develop Required Qualifications: 3+ years of production software development experience in C# engineer role Strong understanding of software engineering principles, testing, data structures and algorithms Hands-on experience in .NET Core and .NET Framework technologies Good knowledge of DBMS like MS SQL / PostgreSQL / DynamoDB Know-how of REST APIs Understanding of OO design patterns, SOLID principles and Clean Code Computer Science degree AI Tooling usage Able to work with Agile methodologies such as SCRUM and/or Kanban Good communication and collaboration skills Self-motivation, proactive attitude Proficiency in English Nice to have: Some experience or interest in developing Cloud and Infrastructure solutions with AWS and CI/CD processes supported by tools like Docker, Kubernetes, Jenkins, Terraform, CircleCI, GitlabCI, Datadog, etc.

🏢 Summary: Full-stack software engineering role focused on building, deploying, and maintaining backend systems in C#/.NET and frontend applications in React or Angular. The position involves designing system architecture, developing microservices in AWS, and working within Agile teams to deliver scalable production solutions. Strong emphasis on cloud infrastructure, CI/CD, and clean architectural practices. 🗂️ Requirements: 5+ years of production experience in C# development, Hands-on experience with .NET Core and .NET Framework, Experience with React or Angular, Experience designing and consuming REST APIs, Experience with AWS and Terraform or CloudFormation, Experience with CI/CD processes, Knowledge of MS SQL, PostgreSQL, or DynamoDB, Understanding of OO design patterns and SOLID principles, Computer Science degree, Experience working in Agile (SCRUM or Kanban), Proficiency in English 📃 Skills: C#, .NET, TypeScript, JavaScript, Node.js, React, Angular, AWS, Terraform, CloudFormation, REST, SQL, PostgreSQL, DynamoDB, CI/CD, SCRUM, Kanban 🏢 Description: About the role You will need to be proficient in backend and frontend development with a thorough understanding of the technologies involved. Strong backend and frontend 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: C#, .NET Core, .NET Framework, Typescript, JavaScript, Node.js, REST APIs, React, Angular, AWS, Terraform Responsibilities: Designing, writing, testing functionalities for a backend system written in C# and a frontend system written in React or Angular & TypeScript Design software architecture between backend, frontend and mobile apps Deploying and maintaining microservices in AWS using Terraform 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 Collaborating with other team members and teams who depend on functionalities that you develop Recruiting and mentoring new team members Required qualifications: 5+ years of production software development experience in C# engineer role Exposure and experience in frontend development in React or Angular frameworks Solid hands-on experience in .NET Core and .NET Framework technologies Experience in working with AWS and Terraform / CloudFormation Strong knowledge of DBMS like MS SQL / PostgreSQL / DynamoDB Expertise of REST APIs Strong hands-on experience of CI&CD processes Proficiency in OO design patterns, SOLID principles, Clean Code and solving architectural problems Computer Science degree AI Tooling usage Able to work with Agile methodologies such as SCRUM and/or Kanban Good communication and collaboration skills Self-motivation, proactive attitude Proficiency in English Nice to have: Working experience with one of the object-oriented and/or functional languages such as Java, Elixir, C++, Golang, Erlang, Python, Kotlin

🏢 Summary: Fullstack engineering role focused on designing, developing, deploying, and maintaining backend services in TypeScript and frontend applications in React. The position involves building and operating microservices in AWS using Terraform, ensuring production stability, and contributing to architecture and feature planning. You will work in an Agile environment with strong emphasis on code quality, testing, and CI/CD practices. 🗂️ Requirements: 5+ years fullstack production experience, Strong TypeScript or C# experience, Experience with React development, Knowledge of PostgreSQL or DynamoDB, Experience building and consuming REST APIs, Hands-on experience with CICD pipelines, Understanding of data structures and algorithms, Knowledge of OOP, SOLID and CleanCode principles, Experience with AWS and infrastructure as code, Computer Science degree, Experience with Scrum or Kanban 📃 Skills: TypeScript, JavaScript, NodeJS, React, REST, AWS, Terraform, CSharp, PostgreSQL, DynamoDB, CICD, Docker, Kubernetes, Jenkins, CircleCI, GitLabCI, Datadog, Microservices, SOLID, CleanCode, OOP, Algorithms, DataStructures, Scrum, Kanban 🏢 Description: About the role You will need to be an expert in backend and frontend development with a thorough understanding of the technologies involved. Strong backend and frontend 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, React, REST APIs, React, AWS, Terraform, C# Responsibilities: Designing, writing, testing functionalities for a backend system written in TypeScript and a frontend system written in React & TypeScript Deploying and maintaining microservices in AWS using Terraform 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 a fullstack role Strong understanding of software engineering principles, testing, data structures and algorithms Solid hands-on experience in technologies such as Typescript or C# Strong knowledge of DBMS like PostgreSQL, DynamoDB Expertise of REST APIs Strong hands-on experience of CI&CD processes Proficiency of OO design patterns, SOLID principles and Clean Code Computer Science degree Able to work with Agile methodologies such as SCRUM and/or Kanban Good communication and collaboration skills Self-motivation, proactive attitude Proficiency in English Nice to have: Some experience or interest in developing Cloud and Infrastructure solutions with AWS and CI/CD processes supported by tools like Docker, Kubernetes, Jenkins, Terraform, CircleCI, GitlabCI, Datadog, etc. Working experience with one of the object-oriented and/or functional languages such as C#, Elixir, C++, Java, Golang, Erlang, Python, Kotlin

🏢 Summary: Backend Engineer role focused on designing, building, and maintaining scalable backend services in a cloud-native AWS environment. The position involves developing production-grade APIs and services using TypeScript and .NET, with strong emphasis on CI/CD, Infrastructure as Code, and cloud-native best practices. The role supports secure, scalable backend systems with close collaboration across platform and operations teams. 🗂️ Requirements: Strong experience building and maintaining scalable APIs and backend services, Hands-on experience with CI/CD pipelines using GitHub Actions or GitHub Workflows, Strong development experience with TypeScript, Strong development experience with .NET (C#), Experience deploying and operating workloads in AWS Cloud, Experience using Terraform for Infrastructure as Code, Experience designing and consuming RESTful APIs or event-driven services, Understanding of cloud-native patterns, Experience with relational databases and SQL, Fluent English 📃 Skills: TypeScript, .NET, C#, AWS, Terraform, SQL, REST, CI/CD, GitHub, GitHubActions, APIs, IAM, Lambda, ECS, Fargate 🏢 Description: We are looking for a Backend Engineer to design, build, and maintain backend services in a modern cloud-native AWS environment. Core skills & experience: Strong experience as a Backend Developer, building and maintaining scalable APIs and backend services Hands-on experience with CI/CD pipelines, preferably using GitHub Actions / GitHub Workflows Strong development experience with TypeScript and .NET (C#), including building and operating production services Familiarity with AWS Cloud, including deploying and operating backend workloads in AWS Experience using Terraform for Infrastructure as Code (IaC) Related technologies / domain knowledge: Experience designing and consuming RESTful APIs and/or event-driven backend services Understanding of cloud-native patterns (stateless services, scaling, resiliency, observability) Experience working with relational databases (SQL) and backend integrations Nice-to-have / preferred experience: Experience with containerized workloads (e.g. ECS Fargate or similar) Experience with Lambda functions Familiarity with IAM and AWS security best practices Exposure to data platforms or ETL-heavy environments Experience working in environments with high operational and security requirements General expectations: Able to take ownership of backend services from development through production Comfortable working closely with platform, data, and operations engineers Focused on clean code, automation, and reliable delivery through CI/CD Used to working with SCRUM principles, preferably in JIRA Fluent English Other Details: The role is designed for a cloud-native environment, supporting development across various backend services focused on scalability and security.

🏢 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: Development of scalable, cloud-native applications using C#/.NET in a microservices architecture on Microsoft Azure. The role focuses on building high-performance, containerized systems, ensuring quality through CI/CD practices, and optimizing performance in modern cloud environments. Position requires strong engineering expertise and experience in travel-related solutions. 🗂️ Requirements: 5+ years experience with C# and .NET, 3+ years experience developing travel-related solutions, Experience with modern cloud architectures, Expertise in Microsoft Azure, Experience with containerized applications, Experience with SQL and NoSQL databases, Strong knowledge of microservices architecture, Understanding of API design principles, Knowledge of clean architecture and SOLID principles, Experience with CI/CD practices 📃 Skills: C#, .NET, Azure, SQL, NoSQL, Microservices, Containers, APIs, CI/CD, SOLID 🏢 Description: Our Client is a rapidly growing European technology company developing advanced digital solutions used by thousands of customers worldwide. The organization focuses on building scalable platforms and innovative products that support operational efficiency and business growth. Their engineering teams work in modern cloud environments and emphasize quality, user experience, and continuous delivery. The company operates internationally and continuously invests in product development and technology excellence. 📍 Location: Warsaw - once per week in the office 🚀 Your responsibilities Develop clean, scalable code using C# / .NET in microservices architecture and cloud-native environments Test and deploy systems and applications on Microsoft Azure Monitor and optimize system performance , identifying and resolving issues proactively Act as a technical expert for the system and support other internal teams Work in an Agile squad , with strong focus on user experience, quality assurance, and CI/CD practices Contribute to the engineering culture by sharing knowledge and applying best practices Work on projects that directly impact the company’s growth and product development 🎯 Our requirements 5+ years of professional experience in software development using C# / .NET and modern cloud architectures 3+ years of experience developing travel-related solutions Strong understanding of core software engineering principles and API design Proven expertise in building and managing high-performance containerized applications on Microsoft Azure Experience designing and managing SQL and NoSQL databases Deep understanding of microservices architecture, clean code, clean architecture, and SOLID principles Professional English proficiency ⭐ Nice to have Working knowledge of Angular / AngularJS Familiarity with AI tools supporting development workflows Experience working in Agile / Scrum environments Thank you for all applications. We will contact selected candidates. TQLO Sp. z o.o. – Employment Agency (KRAZ 33580)

🏢 Summary: The offer is for a .NET Developer responsible for developing and maintaining .NET Core applications and REST APIs in a cloud-based environment. The role involves managing CI/CD pipelines, ensuring high software quality through testing, and working within Agile teams. It is suitable for candidates with 2–3 years of experience seeking remote or hybrid work. 🗂️ Requirements: 2–3 years of experience in C# and .NET Core development, Experience in developing and maintaining REST APIs, Proficiency with Entity Framework Core, Experience with Azure and basic AWS services, Experience with Azure DevOps and CI/CD pipelines, Knowledge of Git and automated build processes, Hands-on experience with Agile and Scrum methodologies, Experience with unit and integration testing 📃 Skills: C#, .NET, Azure, AWS, REST, EntityFrameworkCore, AzureDevOps, Git, CICD, Agile, Scrum, UnitTesting, IntegrationTesting 🏢 Description: Motivated .NET developer with 2–3 years of experience in developing and maintaining C# / .NET Core applications. Experienced with cloud platforms (Azure and AWS), CI/CD pipelines (Azure DevOps), and backend services, with a strong understanding of REST APIs and Agile practices. Solid testing culture with unit, integration, and production validation to ensure high-quality and reliable software. Main Responsibilities: Developing and maintaining .NET Core applications Designing and implementing REST APIs Managing CI/CD pipelines using Azure DevOps Collaborating within Agile teams Ensuring software quality through comprehensive testing practices Participating in code reviews and pair programming Key Requirements: C# / .NET Core development experience Proficiency with REST APIs and Entity Framework Core Experience in Azure and basic AWS services Familiarity with Azure DevOps, Git, and automated build processes Hands-on experience in Agile and Scrum methodologies Knowledge of testing practices: unit testing and integration testing Nice to Have: Knowledge of microservices architecture Basic front-end knowledge: Angular / React Experience with Docker and Kubernetes Understanding of distributed systems and high-availability environments Other Details: Immediate availability is preferred, but negotiation is possible. This role is suitable for remote or hybrid working arrangements.

🏢 Summary: The role involves developing and maintaining scalable full-stack web applications using .NET and modern frontend frameworks. You will design robust Web APIs, optimize databases, and implement clean, testable code within CI/CD-driven environments. The position requires active participation in the full software development lifecycle for international projects. 🗂️ Requirements: Minimum 3 years commercial experience with .NET (C#, Web API, Entity Framework), Proficiency in Angular or React, Strong knowledge of JavaScript, HTML, CSS, Experience with SQL Server or PostgreSQL, Understanding of Unit Testing, Experience with Git, Experience with CI/CD pipelines, Knowledge of design patterns, Knowledge of software development best practices, Fluent English (min. B2), Availability for hybrid work mode 📃 Skills: .NET, C#, WebAPI, EntityFramework, Angular, React, JavaScript, HTML, CSS, SQL, SQLServer, PostgreSQL, UnitTesting, Git, CI/CD 🏢 Description: As a member of our development team, you will be responsible for building scalable web applications, designing robust APIs, and creating intuitive user interfaces. We value clean code, analytical thinking, and a proactive approach to technology. Our expectations: Minimum 3 years of commercial experience in .NET (C#, Web API, Entity Framework). Proficiency in Angular or React, along with JavaScript, HTML, CSS, and modern frontend libraries. Strong experience with relational databases such as SQL Server or PostgreSQL. Solid understanding of Unit Testing, Git, and CI/CD pipelines. Practical knowledge of design patterns and software development best practices. A collaborative mindset and the ability to explain complex technical issues clearly. Strong analytical skills and a "get it done" attitude. Fluent English (min. B2) for smooth collaboration with international partners. Open to work in hybrid mode. Main responsibilities: You will design, develop, and maintain scalable full-stack applications using .NET and modern frontend frameworks (Angular/React) for diverse client projects. You will be responsible for writing clean, testable code and implementing unit tests to ensure the highest software performance and reliability. You will work closely with cross-functional teams to architect robust Web APIs and optimize database schemas while following industry best practices and design patterns. You will actively participate in the full software development life cycle, including CI/CD processes and version control management, to ensure seamless project delivery.