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Head of Recruitment / Principal @ Talego | Your go to Tech-for-Good Partner | Part of the MRJ Group

Contract Role | .NET Engineer (Billing Systems)

Location: Remote (UK-based)

Duration: 6 months

Rate: Up to £550 p/d (outside IR35)

We’re exclusively supporting a fast-scaling SaaS business on a high-volume billing transformation project.

Their existing platform processes 100,000+ transactions per month and underpins a significant proportion of company revenue. A migration to a new cloud billing system is already partially complete, and this role will be central in analysing, deconstructing, and shaping the future of the billing infrastructure.

What You’ll Do:

• Analyse and deconstruct the current billing platform.
• Identify fracture lines and design robust, scalable solutions.
• Build APIs and produce clear technical documentation.
• Plan integrations between internal CRM systems and the new billing platform.
• Contribute to migration strategy for a mission-critical, high-volume environment.

What We’re Looking For:

• Proven expertise with .NET Framework, C#, ASP.NET, SQL Server, WinForms.
• Background in billing systems, payroll, accounting, or invoicing solutions.
• Experience working with large-scale, high-volume transactional systems.
• A senior-level engineer/consultant able to work independently and deliver impact fast.
• Strong understanding of billing, data, APIs, and performance at scale.

Why Join?

• Exclusive contract role not available elsewhere.
• Direct impact on a business-critical system at scale.
• Opportunity to work closely with founders and senior leaders on a strategic project.
• Remote working and strong day rate.

As their exclusive recruitment partner, we have the inside track on this project and direct access to the hiring team, giving you the best chance to secure this role. For more information, apply and we’ll be in touch

Seniority level

• Mid-Senior level

Employment type

• Contract

Job function

• Engineering and Information Technology

Industries

• IT System Custom Software Development

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