Senior .NET Data Engineer - SQL & AWS (London)

We are currently seeking multiple Senior .Net Developers to join a prestigious financial services client based in London. This is a long‑term, business‑critical project focused on data‑heavy applications that require robust and scalable solutions. As a Senior .Net Developer, you will play a pivotal role in designing, developing, and maintaining complex data‑driven systems that support the company’s core operations. The role offers an exciting opportunity to work on innovative projects utilizing the latest technologies and methodologies, contributing significantly to the organization’s digital transformation and data strategy.

You will collaborate with cross‑functional teams, including data analysts, architects, and project managers, to deliver high‑quality software solutions that meet business needs and compliance standards.

Qualifications

The ideal candidate will possess a strong technical background with proven experience in .Net development, particularly in data‑intensive environments. Essential qualifications include extensive experience in C# and .Net frameworks, along with advanced SQL development skills. A solid understanding of database modeling, performance tuning, and optimization is crucial. Candidates should have thorough knowledge of application programming for data‑heavy applications on SQL Server, including stored procedures and tSQL scripting. Familiarity with cloud platforms, especially AWS, is highly desirable. Additionally, knowledge of artificial intelligence and machine learning concepts is considered a plus, though not mandatory. Candidates should demonstrate excellent problem‑solving skills, attention to detail, and the ability to work effectively within a team environment.

Responsibilities

Your primary responsibilities will include designing, developing, and maintaining scalable data‑driven applications using C# and .Net technologies. You will be responsible for writing efficient and optimized SQL queries, stored procedures, and ensuring database integrity and performance. Collaborating with stakeholders to gather requirements and translate them into technical specifications is essential. You will also participate in code reviews, testing, and deployment processes to ensure high‑quality deliverables. Maintaining documentation, adhering to best practices, and continuously improving system performance are vital aspects of your role. Additionally, you will stay updated on emerging technologies and industry trends to incorporate innovative solutions into the project. Working closely with cloud infrastructure teams to deploy and manage applications on AWS will also be part of your responsibilities, ensuring security and scalability.

Benefits

This role offers a competitive daily rate of up to £850 on an umbrella basis, with an initial contract until the end of the year, with potential extensions based on performance and project needs. The position is based in London with a hybrid working model, providing flexibility and work‑life balance. You will have access to a dynamic and collaborative work environment, opportunities for professional growth, and exposure to cutting‑edge technologies in the financial services sector. The company also offers comprehensive support for career development, including training and mentoring programmes, and a supportive team culture focused on innovation and excellence.

Equal Opportunity

Hays Specialist Recruitment Limited is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees and applicants. We do not discriminate based on race, ethnicity, gender, age, sexual orientation, disability, religion, or any other protected characteristic. We believe that a diverse workforce enhances our ability to serve clients and provides a richer, more innovative environment for our team members. We are dedicated to fostering an inclusive workplace where everyone has equal access to opportunities and resources to succeed.