Senior Full Stack Developer (React / C# .NET)
Contract: Initial 3-Month Engagement (Long-Term Programme)
IR35 Status: Outside IR35
Location: Hybrid Working - Approximately 1 day per week in Birmingham (flexible based on project requirements)
Rate: £500 per day Outside IR35
Overview
We are seeking experienced Senior Full Stack Developers to join a major business transformation programme focused on modernising platforms, data capabilities, and core business processes.
This is an opportunity to play a key role in the design, development, and delivery of enterprise-scale solutions, working across both front-end and back-end technologies while contributing to data migration, integration, and technical design activities.
The successful candidates will be strong engineers with deep expertise in React and C#/.NET, capable of operating across the full technology stack and collaborating closely with Product Owners, Business Analysts, Architects, and Testing teams within an Agile delivery environment.
Key Responsibilities
Full Stack Development
- Design, develop and maintain modern web applications using React and C#/.NET.
- Deliver robust front-end experiences with a strong focus on usability and performance.
- Build scalable and maintainable back-end services, APIs, and integrations.
- Contribute across the full technology stack where required.
- Support development best practices, code quality, and technical standards.
Data & ETL
You will support key data transformation initiatives, including:
- Migration of existing artefacts into target data models.
- ETL solution design and implementation.
- Development of data ingestion processes and pipelines.
- Integration with target platforms, applications, and databases.
- Validation, transformation, and reconciliation of legacy data.
Technical Design & Architecture
Working alongside Architects and technical stakeholders, you will contribute to:
- Solution architecture discussions.
- System and integration design activities.
- Environment and deployment strategy.
- Technical assessments and feasibility analysis.
- Definition of implementation approaches and delivery options.
Agile Delivery
- Participate in workshops, discovery sessions, and sprint planning activities.
- Refine business requirements and technical features.
- Provide estimates and support work sizing exercises.
- Contribute to sprint delivery and release activities.
- Collaborate closely with Product Owners, Business Analysts, Architects, and Test teams.
Essential Skills & Experience
- Extensive commercial experience as a Full Stack Developer.
- Strong expertise in React and modern front-end development practices.
- Strong experience with C#/.NET and back-end API development.
- Experience designing and developing enterprise-grade applications.
- Proven experience working on data migration, ETL, or integration projects.
- Strong understanding of relational databases and data modelling.
- Experience contributing to technical design and architectural discussions.
- Comfortable working within Agile delivery teams.
- Excellent stakeholder engagement and communication skills.
Desirable Experience
- Experience working on large-scale transformation programmes.
- Exposure to cloud-based architectures and modern deployment approaches.
- Experience integrating with multiple enterprise platforms and third-party systems.
- Familiarity with Jira, Confluence, and Agile tooling.