Application Support Specialist (2nd / 3rd Line)

Location: Windsor (Hybrid working available)

Job Type: Permanent, Full-Time

Salary: Competitive + Overtime/Out of hours Bonus + Excellent Benefits

Experience Level: Senior (10+ years)

We’re recruiting for an experienced Application Support Specialist to join a leading organisation’s IT Applications team. This is a great opportunity for a skilled professional with strong technical and problem-solving abilities to deliver high-quality 2nd and 3rd line support across business-critical applications.

You’ll work closely with internal teams and external suppliers to maintain application availability, improve performance, and ensure excellent service delivery within agreed SLAs.

• Provide 2nd and 3rd line support for a range of applications, ensuring incidents and problems are resolved quickly.
• Work with development, testing, and infrastructure teams to optimise application performance and reliability.
• Conduct root cause analysis and implement permanent fixes to minimise recurrence of issues.
• Create and maintain clear technical documentation for supported applications and services.
• Develop and maintain monitoring and alerting systems using tools such as SolarWinds and Azure Application Insights.
• Coordinate software releases and maintenance activities (patching, upgrades, etc.).
• Support continual service improvement initiatives and contribute to IT strategy and roadmaps.
• Participate in an on-call rota to support production environments.

• 10+ years of IT experience, with extensive hands-on exposure to application support and related technologies.
• Strong background in 2nd and 3rd line support within complex enterprise environments.
• Proficient in troubleshooting, analysis, and problem resolution.
• Experience with monitoring tools (e.g. SolarWinds, Azure Application Insights).
• Excellent stakeholder management and communication skills.
• Knowledge of ITIL service management processes.
• Ability to work collaboratively across multiple teams and business units.
• Experience in creating and maintaining technical documentation.

Competitive salary and comprehensive benefits package

Hybrid and flexible working options

Opportunities for professional growth and career development

Involvement in key business applications supporting enterprise operations

Supportive, collaborative IT team environment

If you’re a proactive Application Support Specialist looking for your next challenge, we’d love to hear from you.