Senior.Net Integration Developer

Rise Technical; Maidenhead; Hybrid; GBP 50,000 - 70,000; Full time

Job summary

An international SaaS provider in Maidenhead is seeking a Senior .NET Integration Developer to own the development of third-party integrations. The ideal candidate has extensive experience in C#/.NET, understands REST/WebAPI, and can design secure, scalable solutions. This role offers a hybrid working model, competitive salary, and opportunities for professional development.

Benefits

Holiday

Pension

Training

Private Health Plan

Qualifications

• Extensive commercial experience with C# / .NET in integration-heavy environments.
• Strong understanding of REST, WebAPI, asynchronous messaging, and event-driven patterns.
• Hands-on experience building fault-tolerant systems (queues, retries, circuit breakers).
• Proficient in integration security, authentication, and encryption.

Responsibilities

• Develop and maintain secure, scalable integrations with financial and third-party systems.
• Enhance the integration framework for performance, resilience, and cloud readiness.
• Support customers and partners with integration setup and API usage.
• Expand telematics integrations including event tracking and CO2 reporting.
• Implement structured logging, monitoring, and high-quality documentation.

Skills

C# / .NET

REST

WebAPI

Asynchronous messaging

Event-driven patterns

Integration security

API documentation

Job description

Senior .NET Integration Developer

Maidenhead - Hybrid (3 days on site & 2 from home)

£50,000 - £70,000 + Holiday + Pension + Training + Private Health Plan

Excellent opportunity for an experienced C# .NET looking to join a stock market listed business, renowned for their supportive culture and award-winning training opportunities.

This company are a well-established, international, and industry-leading SaaS provider delivering innovative platform solutions to customers across the financial, telematics, and logistics sectors. They design, develop, and support secure and scalable systems that process high-value data for global partners.

In this role you will own the development and maintenance of robust third-party integrations, helping to evolve the organisation's integration framework. You will work across financial, telematics, and mapping APIs, ensuring solutions are secure, scalable, and aligned with modern cloud architecture. You will use your expertise in C# / .NET and modern APIs (REST, WebAPI, JSON, OAuth2) to build fault-tolerant, event-driven integrations, support customers and partners with API usage, and deliver clear, high-quality documentation while maintaining security, GDPR compliance, and operational reliability.

You will work directly with clients to understand their integration requirements and translate them into secure, scalable solutions. Taking integration leadership, you will design and maintain well-documented financial and third-party integrations built on modern API standards. Strong communication will be key, as you'll explain solutions clearly and produce high-quality technical documentation to support successful implementation.

This is a fantastic opportunity for a skilled Integration Developer to join an international SaaS specialist where you will work on high-impact systems and help shape the future of their global platform.

The Role

• Develop and maintain secure, scalable integrations with financial and third-party systems
• Enhance the integration framework for performance, resilience, and cloud readiness
• Support customers and partners with integration setup and API usage
• Expand telematics integrations including event tracking and CO? reporting
• Implement structured logging, monitoring, and high-quality documentation
• Hybrid working, 3 days a week office based in Maidenhead

The Person

• Extensive commercial experience with C# / .NET in integration-heavy environments
• Strong understanding of REST, WebAPI, asynchronous messaging, and event-driven patterns
• Hands-on experience building fault-tolerant systems (queues, retries, circuit breakers)
• Proficient in integration security, authentication and encryption