Delphi / SQL Developer
Location: Essex – Hybrid – 2 days per week in the office
Salary: Up to £80,000
Type: Permanent
Cooper Lomaz are recruiting on behalf of our client for an experienced Delphi / SQL Developer to join a well‑established development team supporting large‑scale, business‑critical enterprise systems.
This is a key role focused on maintaining, enhancing, and future‑proofing a legacy Delphi‑based application, while contributing to ongoing development and modernisation initiatives.
The Role
As a Delphi / SQL Developer, you will play a vital role in ensuring the stability, performance, and scalability of a complex enterprise system used globally. You will be responsible for analysing existing codebases, implementing improvements, resolving defects, and contributing to future development plans.
Working closely with cross‑functional teams, you will translate business requirements into robust technical solutions, helping to drive long‑term system reliability and efficiency.
Key Responsibilities
- Maintain, support, and enhance existing Delphi applications
- Diagnose and resolve complex software defects and performance issues
- Analyse legacy code and identify opportunities for improvement and modernisation
- Work closely with business stakeholders to gather and translate requirements
- Develop and implement new features and system enhancements
- Produce clear and accurate technical documentation
- Participate in sprint planning, estimation, and code reviews
- Ensure adherence to secure coding practices and internal QA standards
- Collaborate with QA, Infrastructure, and wider technical teams
- Contribute to system upgrades, transitions, and enhancement projects
- Take ownership of tasks and deliver within agreed timelines
Required Experience
- Minimum 10 years’ commercial experience with Delphi
- Minimum 10 years’ experience with Transact‑SQL / Microsoft SQL Server
- At least 3 years’ experience with .NET / C#
- Strong experience maintaining and upgrading legacy systems
- Proven background working with complex, data‑driven applications
- Experience working within structured SDLC environments
- Familiarity with Agile, Waterfall, or hybrid delivery models
- Experience collaborating across technical and non‑technical teams
- Previous team leadership experience is advantageous
Technical Knowledge
- Strong knowledge of Delphi (XE2, XE10 and later versions)
- Experience with component‑based and enterprise system architectures
- Familiarity with third‑party Delphi components
- Solid understanding of Windows desktop application development
- Strong knowledge of Microsoft SQL Server
- Experience with multi‑tier architectures and system integrations (REST, SOAP, APIs, COM)
- Proficiency in debugging, performance tuning, and optimisation
- Experience using version control systems (Git, SVN, etc.)
- Understanding of secure coding practices and business‑critical systems
Key Skills
Technical Skills
- Strong Delphi development and coding capability
- Experience refactoring and maintaining legacy codebases
- Advanced SQL skills including stored procedures and database objects
- Experience integrating with APIs and external services
- Ability to work with undocumented systems and reverse‑engineer functionality
- Strong performance analysis and optimisation skills
Soft Skills
- Excellent analytical and problem‑solving abilities
- Strong communication skills across technical and business stakeholders
- Ability to work independently within a structured environment
- High attention to detail and organisational skills
- Adaptability and a continuous improvement mindset
- Leadership capabilities (desirable)
Education
- Degree in Computer Science, Software Engineering, or a related field
- Equivalent commercial experience in Delphi development
Relevant certifications in software development or database technologies are beneficial.
About the Opportunity
This is an excellent opportunity to join a highly skilled development team working on critical systems with long‑term strategic importance. The role offers the chance to make a tangible impact on system stability, performance, and future direction.
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