At a Glance
- Tasks: Support and troubleshoot complex enterprise applications using .NET and SQL.
- Company: Dynamic tech company with a focus on innovation and collaboration.
- Benefits: Up to £50K salary, 30 days holiday, private healthcare, and more.
- Other info: Hybrid work model with opportunities for career growth and development.
- Why this job: Join a hands-on role and make a real impact in a growing tech environment.
- Qualifications: Experience in application support, strong SQL skills, and knowledge of .NET.
Our client provides enterprise-grade Field Service Management (FSM) platform, serving multi-vertical service operations across fire & security, facilities management, HVAC, medical devices, and MoD/defence supply chain customers in the UK, Ireland, and internationally.
About the Role
Their platform comprises three core applications: built on a .NET/VB.NET/C# stack with SQL Server, deployed across both Azure-hosted and on-premise (Windows Server) customer environments. They are a strategic 'Spearhead' product, with active investment in a UX/UI overhaul, migration to Azure PaaS, and ongoing feature development.
You will work shoulder-to-shoulder with the engineering team — confirming genuine defects, providing detailed technical reproduction steps, and occasionally contributing fixes yourself for well-understood issues. This is a hands-on technical role for someone who enjoys getting into the guts of a complex enterprise application.
What You’ll Be Doing:
- Own escalated tickets from 1st line support requiring deeper technical investigation across Service Centre, REA, and RCA.
- Write and run SQL Server queries against production and test databases to investigate data integrity issues, configuration problems, and reported bugs.
- Read and step through Tesseract's VB.NET/C#/.NET Framework and .NET codebase to understand root cause, distinguishing genuine defects from configuration or user error.
- Reproduce complex, intermittent, or environment-specific issues across ASP.NET WebForms, MVC, and newer Vue.js/SPA components of the application.
- Troubleshoot SOAP and REST API integration issues raised by customers connecting third-party or ERP systems to Tesseract.
- Investigate issues at the infrastructure level — Windows Server (2019/2022), IIS, and SQL Server configuration — across both Azure-hosted and on-premise customer environments.
- Monitor and respond to production alerts via Site24x7, carrying out first-level infrastructure diagnostics ahead of escalation to platform/engineering teams.
- Log well-evidenced defects into Jira with clear reproduction steps, logs, and impact assessment, and track them through to resolution and release.
What You’ll Need:
Essential
- Proven experience in a 2nd line / technical support or application support role, ideally supporting a complex B2B or enterprise software product.
- Strong working knowledge of SQL Server — confident writing non-trivial queries (joins, aggregations) to investigate data and configuration issues.
- Ability to read and reason about C# and/or VB.NET code to identify root cause, even without day-to-day development responsibility.
- Practical understanding of ASP.NET applications (WebForms and/or MVC) and how they’re deployed under IIS.
- Comfortable working with Windows Server environments — troubleshooting application, IIS, and OS-level issues.
- Experience with API troubleshooting — inspecting SOAP or REST requests/responses (e.g. via Postman, SoapUI, or browser dev tools) to isolate integration issues.
- Strong analytical and diagnostic skills — able to work methodically from symptom to root cause on ambiguous or intermittent issues.
- Excellent communication skills, comfortable explaining technical findings to both customers and engineers.
What They’ll Offer You:
- Competitive salary
- Pension - 5% company contribution, 3% personal contribution
- Private Healthcare via BUPA
- A holiday allowance of 30 days, plus bank holidays per annum
- Employee Assistance Program (EAP)
- Electric car scheme
- Cycle to work scheme
- Enhanced Maternity/Paternity Pay
Our client is an equal-opportunity employer and values diversity in its workforce. We encourage applicants from all backgrounds to apply.
SmartSourcing are a Disability Confident Employer and we promote, celebrate and value diversity, we are committed to promoting equality and inclusion for all.
Application Support Engineer in Marlow employer: SmartSourcing Ltd
Join a forward-thinking company in Marlow as an Application Support Engineer, where you will be part of a dynamic team dedicated to enhancing an enterprise-grade Field Service Management platform. With a strong focus on employee well-being, the company offers competitive salaries, generous holiday allowances, and comprehensive benefits including private healthcare and an electric car scheme. The collaborative work culture fosters professional growth and encourages innovation, making it an ideal environment for those seeking meaningful and rewarding employment.
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We think this is how you could land Application Support Engineer in Marlow
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We think you need these skills to ace Application Support Engineer in Marlow
Some tips for your application 🫡
Showcase Your Problem-Solving Skills:In IT consulting, it's all about problem-solving, so make sure your CV highlights your analytical skills and any relevant projects you've tackled. Mention specific technologies or methodologies you've used to resolve issues or improve processes; this shows you can think critically and deliver results, which is vital for us at SmartSourcing Ltd.
Highlight Relevant Certifications:Certifications like ITIL, PMP, or even specific tech stack qualifications can really make you stand out. Make sure to include these in your CV, as they not only demonstrate your expertise but also your commitment to staying current in the field. We love seeing candidates who are proactive about their professional development!
Tailor Your Cover Letter:Your cover letter is your chance to connect personally with us at SmartSourcing Ltd. Share stories about your experiences in IT consulting, and how they shaped your desire to join our team. Mention why you’re excited about this particular role, and how you see yourself contributing to our projects.
Keep It Clear and Concise:We're all busy, so make sure your application is easy to read. Use bullet points for key achievements, and don’t overload us with jargon. A clean, professional layout goes a long way. Remember, the clearer your application, the more likely we are to invite you in for an interview!
How to prepare for a job interview at SmartSourcing Ltd
✨Brush Up on Your Technical Skills
For an IT consulting role, be ready to demonstrate your technical prowess. You might face questions on systems integration, cloud technologies, or even troubleshooting specific software. If you have experience with tools like AWS, Azure, or even specific programming languages, make sure you can talk about them fluently.
✨Showcase Your Problem-Solving Approach
IT consulting is all about solving problems for clients. Think about how you can illustrate your approach to a past challenge using the STAR method (Situation, Task, Action, Result). It's a great way to show how you tackle complex issues and come up with effective solutions.
✨Know the Business Impact of IT Solutions
When discussing your experiences, focus not just on the tech solutions you implemented, but also on their business impact. Employers want to see that you can connect IT with organisational goals. Prep examples that highlight how your tech contributions improved efficiency or reduced costs for past clients or projects.
✨Prepare for Behavioural Questions
Since IT consulting often involves teamwork and client interactions, expect behavioural questions that assess your interpersonal skills. Be prepared with examples that demonstrate your adaptability, communication skills, and how you handle client feedback. Before the interview, think of situations where you worked closely with clients to create effective IT strategies or changes.
