CrawlJobs Logo

Senior Full-Stack Developer (.NET + React)

United Kingdom · Job Posted June 28, 2026
Apply Position
Job Link Share

Job Description

Are you a Senior Full-Stack Developer looking to work on impactful projects in the automotive industry? Join Sigma Software and contribute to cutting-edge solutions that help prevent production faults before they happen. This is a Senior role with a Remote work format, offering full-time engagement and direct collaboration with Customer teams. At Sigma Software, we value innovation, ownership, and engineering excellence — and we’ve been delivering high-quality solutions for over 20 years. Why join us? You’ll work with a modern tech stack, cloud-native environments, and AI-assisted development tools, all while contributing to solutions that make a real difference in production quality.

Requirements

  • .NET/C# / expert
  • React.js / expert
  • Kubernetes / strong
  • AWS / strong
  • PostgreSQL / strong

What we offer

  • Diversity of Domains & Businesses
  • Variety of technology
  • Health & Legal support
  • Active professional community
  • Continuous education and growing
  • Flexible schedule
  • Remote work
  • Outstanding offices (if you choose it)
  • Sports and community activities

Looking for more opportunities?

Search for other job offers that match your skills and interests.

Similar Jobs for

Senior Full-Stack Developer (.NET + React)

8 matching positions

Senior/ Lead Full-Stack (.NET + React) Developer

ELEKS Software Engineering and Development Office is looking for a Senior/ Lead ...
Location
Location
Poland
Salary
Salary:
Not provided
eleks.com Logo
ELEKS
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 4+ years of experience with C#, .NET Core, NET Framework
  • 3+ years of experience with React
  • Experience with Azure native microservices architecture & Azure services (AI search, key vault, AKS, storage queue, Azure Functions, event hub, APIm)
  • Security protocols: OAuth 2.0 (OKTA)
  • Experience with Kubernetes, Dockers
  • Hands-on experience in building RESTful APIs based on API management
  • Good knowledge of CI/CD based on DevOps services, Terraform
  • Hands-on experience in Unit Testing using XUnit / Nunit
  • Minimal API standard knowledge
  • ORMs: EF6
Job Responsibility
Job Responsibility
  • Design, develop, and maintain reliable software in line with technical requirements
  • Analyze requirements, and independently estimate and set up tasks’ acceptance criteria
  • Evaluate and coordinate tasks’ deadlines with the Technical Leader or Project Manager
  • Apply the best software development practices and coding standards to produce high-quality and performant solutions
  • Stay up-to-date with modern technology and optionally obtain professional certifications
  • Participate as a trainer or a trainee in various learning programs outside the main project
What we offer
What we offer
  • Close cooperation with a customer
  • Challenging tasks
  • Competence development
  • Ability to influence project technologies
  • Team of professionals
  • Dynamic environment with low level of bureaucracy
Read More
Arrow Right

Senior Full-Stack Developer, .Net Focus

We're seeking a talented and passionate Senior Full-Stack Developer to join our ...
Location
Location
United States , Greater Cincinnati/Dayton, OH
Salary
Salary:
Not provided
ingagepartners.com Logo
Ingage Partners
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 5+ years of experience in full-stack software development
  • Proven experience in modern .NET development, with proficiency in technologies such as Web API/MVC and Entity Framework (or similar)
  • Experience with cloud platforms, preferably Azure, including Azure App Service, Azure Functions, Azure SQL, and Azure DevOps (or similar)
  • Solid understanding of front-end development using modern frameworks like React, Vue.js, or Angular, along with JavaScript, HTML, and CSS
  • Experience with databases (SQL or NoSQL), CI/CD pipelines, and testing frameworks
  • Strong working knowledge of Agile development methodologies
  • Experience with DevOps tools and processes
  • Demonstrated ability to work independently and collaboratively within a team environment
  • Excellent communication, problem-solving, and interpersonal skills
  • A passion for creating innovative solutions and making a positive impact
Job Responsibility
Job Responsibility
  • Design, develop, and implement full-stack applications utilizing .NET, Azure, and modern front-end frameworks
  • Collaborate with clients and internal teams to gather requirements and translate them into technical specifications
  • Write clean, efficient, and well-documented code
  • Participate in code reviews to ensure code quality and adherence to best practices
  • Contribute to all phases of the software development lifecycle, from planning to deployment and maintenance
  • Troubleshoot and debug software issues, ensuring high levels of performance and reliability
  • Work within an Agile environment, participating in sprints and contributing to team goals
  • Engage with clients to understand their business needs and provide technical guidance
  • Actively participate in our company's community impact and open-source initiatives
  • Embrace growth opportunities and contribute to our culture of continuous learning
  • Fulltime
Read More
Arrow Right

Senior Full-stack .NET Azure Developer

Work on systems that process large-scale transactions daily, influence critical ...
Location
Location
Netherlands , Den Haag
Salary
Salary:
Not provided
levy-professionals.com Logo
Levy Professionals
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 8+ years of experience in .NET and C# development
  • Strong experience with cloud-native development on Microsoft Azure
  • Solid understanding of microservices, domain-driven design and event-driven architecture
  • Experience with modern frontend frameworks such as Vue.js, Angular or React
  • Hands-on experience with automated testing frameworks and test strategies
  • Experience with CI/CD, infrastructure as code, and containerization (Docker)
  • Familiar with tools such as Azure DevOps, ARM, Bicep and scripting (Powershell)
  • Experience working in Agile or Scrum environments
  • Strong communication skills and ability to mentor team members
  • Fluent in Dutch and English
Job Responsibility
Job Responsibility
  • Take ownership of end-to-end development, from design to deployment
  • Collaborate closely with product ownership to translate business needs into scalable technical solutions
  • Guide less experienced engineers and driving best practices across the team
Read More
Arrow Right

Full-Stack Senior Engineer (.NET & React)

We are looking for a Senior Fullstack Engineer to join a team working on a globa...
Location
Location
Georgia
Salary
Salary:
Not provided
itransition.com Logo
Itransition
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 6+ years of experience with .NET
  • Strong backend development experience
  • Practical experience with microservices
  • Experience with React, Redux, and TypeScript
  • Experience with Azure and containerized applications. Hands-on experience with Kubernetes
  • Proficiency in SQL Server and experience with NoSQL/Caching layers like MongoDB, CosmosDB, or Redis
  • Understanding of patterns such as CQRS, Event Sourcing, Saga, or API Gateway
  • Good English for daily communication
Job Responsibility
Job Responsibility
  • Develop new backend and frontend features
  • Build and maintain .NET-based services
  • Work with React, Redux, and TypeScript on the frontend
  • Help modernize legacy components and move them into a microservices architecture
  • Work with distributed system patterns, event-driven communication, and service orchestration
  • Participate in technical discussions, estimations, and code reviews
  • Collaborate with an international Scrum team
What we offer
What we offer
  • Projects for such clients as PayPal, Wargaming, Xerox, Philips, Adidas and Toyota
  • Competitive compensation that depends on your qualification and skills
  • Career development system with clear skill qualifications
  • Flexible working hours aligned to your schedule
  • Options to work remotely
  • Corporate medical insurance covering services of private and public medical centers
  • English courses online
  • Corporate parties and events for employees and their children
  • Internal conferences, workshops and meetups for learning and experience sharing
  • Gym membership compensation
  • Fulltime
Read More
Arrow Right

Senior Full-Stack Developer

At SQA Group, we’re always looking to connect with talented Senior Full Stack De...
Location
Location
Salary
Salary:
Not provided
sqagroup.com Logo
SQA Group
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 7+ years of professional full stack development experience
  • Strong proficiency with C#, .NET Core, and React (or similar frameworks)
  • Hands-on experience with Azure cloud services and modern DevOps practices
  • Solid SQL/database design skills and familiarity with CI/CD pipelines
  • Excellent communication and a passion for collaboration and mentorship
Job Responsibility
Job Responsibility
  • Designing and developing scalable full stack applications using C#, .NET Core, and modern JavaScript frameworks like React
  • Building robust APIs, intuitive user interfaces, and high-performance backend services
  • Working within cloud environments, leveraging services across Azure, AWS, or GCP along with containerized deployments (Docker, Kubernetes)
  • Collaborating with cross-functional teams: Product, QA, DevOps, & UX in agile, Scrum-based settings
  • Contributing to architecture, code reviews, and mentoring junior developers
Read More
Arrow Right

Senior Engineer .Net Full-Stack

Axian is seeking a Senior Full Stack Software Engineer to design, build, and mod...
Location
Location
United States , Portland
Salary
Salary:
Not provided
axian.com Logo
Axian
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Bachelor's degree in Computer Science or equivalent combination of education and 7+ years of professional experience in software engineering or information technology
  • 4+ years of hands-on C# and .NET development experience
  • Strong experience building enterprise-level multi-tiered business applications
  • Strong experience building REST APIs and backend service architectures
  • Strong understanding of object-oriented design principles and software architecture patterns
  • Strong experience developing modern SPA applications using React
  • Strong JavaScript and/or TypeScript development experience
  • Strong proficiency with HTML5 and modern CSS
  • Strong experience designing and developing applications backed by relational databases such as SQL Server, PostgreSQL, MySQL, or Oracle
  • Advanced SQL development skills, including query optimization, indexing strategies, stored procedures, and performance tuning
Job Responsibility
Job Responsibility
  • Design and develop modern enterprise applications using C#, .NET, and cloud-native architectures
  • Build scalable REST APIs, backend services, and distributed application components
  • Develop and maintain modern SPA frontends using React, TypeScript, HTML, and CSS
  • Design and implement multi-tiered business applications and microservices architectures
  • Integrate enterprise systems, third-party APIs, databases, and cloud services
  • Develop secure, reliable, and maintainable software using modern engineering best practices
  • Create automated unit, integration, and end-to-end tests to support high-quality software delivery
  • Participate in Agile/SCRUM development teams and contribute to sprint planning, estimation, and technical design discussions
  • Implement CI/CD pipelines and support DevOps automation practices
  • Optimize application performance, scalability, reliability, and operational observability
  • Fulltime
Read More
Arrow Right

Senior React Engineer (Full-Stack Focus)

We are seeking an experienced Senior React Developer to join a collaborative Agi...
Location
Location
United States , Maple Grove
Salary
Salary:
Not provided
Intellias
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 5–7+ years of professional software development experience
  • Strong React development experience (mandatory)
  • Experience with React Redux
  • Strong JavaScript and TypeScript skills
  • Experience building enterprise-scale web applications
  • Strong understanding of front-end architecture and component design
  • Experience working with .NET Core backend environments
  • Strong API development and integration experience
  • Experience consuming and integrating RESTful services
  • SQL experience
Job Responsibility
Job Responsibility
  • Design, develop, and maintain modern web applications using React and TypeScript
  • Build scalable, reusable front-end components and application architecture
  • Collaborate with backend developers working within a .NET Core environment
  • Develop and integrate RESTful APIs across front-end and backend systems
  • Mentor and support developers who are growing their React expertise
  • Help establish front-end engineering standards, best practices, and development patterns
  • Participate in code reviews, technical discussions, and Agile ceremonies
  • Write clean, maintainable, and testable code
  • Support unit testing efforts across front-end and backend integrations
  • Work effectively within projects that may contain evolving requirements and ambiguity
  • Fulltime
Read More
Arrow Right

Senior Full-Stack Engineer - Java & React

As a Senior Full‑Stack Engineer, you will design, build, and deliver cutting‑edg...
Location
Location
Poland , Gdansk
Salary
Salary:
Not provided
mastercard.com Logo
Mastercard
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 5+ years of software engineering experience across backend and frontend development
  • Strong hands‑on experience with Java, plus proficiency in React
  • Experience with .NET is welcome but not required
  • Solid experience building RESTful APIs, microservices, and working in cloud environments (AWS, GCP, or Azure)
  • Strong understanding of UI/UX principles, responsive design, and accessibility standards
  • Demonstrated experience collaborating with designers and product teams to deliver user‑centric products
  • Knowledge of modern engineering practices: CI/CD, automated testing, code reviews, Agile/Scrum
  • Excellent communication and stakeholder‑management skills, with the ability to translate between technical and business needs
  • Proactive, detail‑oriented, accountable, and comfortable working independently in a fast‑paced environment
Job Responsibility
Job Responsibility
  • Plan, design, and develop full‑stack solutions that align with Mastercard’s engineering standards, processes, and best practices
  • Build and maintain scalable backend services and APIs within Mastercard’s Open Finance ecosystem using Java
  • Collaborate with UI/UX designers to implement responsive, accessible user interfaces using React
  • Ensure that front‑end applications meet WCAG accessibility guidelines, deliver exceptional performance, and are optimised for multiple devices
  • Ensure high code quality through unit/integration testing, peer reviews, and CI/CD pipelines
  • Contribute across the full software development life cycle—from requirements gathering to release and ongoing support
  • Troubleshoot, debug, and resolve production issues, ensuring service resilience and performance
  • Mentor and support junior engineers, fostering knowledge sharing and continuous improvement
  • Partner with product owners and stakeholders to prioritise features, communicate progress, and manage technical trade‑offs
  • Stay current with emerging technologies, frameworks, and best practices across frontend and backend engineering
  • Fulltime
Read More
Arrow Right