Lead .NET Engineer (Multi-Stack Oversight)

With Intelligence; Camden Town; Hybrid; GBP 60,000 - 80,000; Full time

Job summary

A leading data insights provider in the UK is seeking a .Net Specialist to lead teams in designing and implementing software solutions using the .NET framework. You will guide modernization efforts and collaborate with product managers and developers to ensure reliable product delivery. The ideal candidate has a strong background in C#, .NET technologies, and experience mentoring teams. This role offers flexible working arrangements and a comprehensive benefits package.

Benefits

24 days annual leave

Enhanced parental leave

Health Cash Plans

Wellness Days

Flexible Fridays

Birthday day off

Employee assistance program

Travel loan scheme

Charity days

Breakfast provided

Social Events throughout the year

Qualifications

• Prior experience in a senior or lead .NET development role, preferably in a fast-paced product or SaaS environment.
• Strong communication skills and ability to collaborate across teams.
• Experience designing and maintaining RESTful APIs within .NET.

Responsibilities

• Architect, develop, and maintain complex web and backend applications.
• Lead modernization efforts from legacy technologies to scalable platforms.
• Guide developers through code reviews and provide architectural support.

Skills

C#

.NET Framework 4.x

.NET Core 3.x

ASP.NET

AWS hosting

SQL

Tools

TeamCity

Octopus Deploy

Git

Job description

Overview

As a .Net Specialist you will be leading teams in the design, development, and implementation of software solutions using the .NET framework. You will act as a technical authority across multiple product stacks. This position requires leading architectural discussions, guiding developers, and driving the strategic evolution of legacy and modern systems. You'll work in a collaborative, cross‑functional team to modernise our applications, define best practices, and ensure reliable product delivery.

Responsibilities

• Architect, develop, and maintain complex web and backend applications across multiple product lines using C# and .NET Framework/Core.
• Contribute to the overall technical strategy and roadmap working across multiple squads.
• Lead modernisation efforts from legacy technologies (Web Forms, ASMX) to more scalable, maintainable platforms (.NET Core, MVC, etc.).
• Collaborate with product managers, QA, and DevOps engineers to define and implement software requirements in line with engineering goals in agile sprints.
• Guide developers through code reviews, mentoring, and architectural support.
• Implement and maintain CI/CD pipelines using TeamCity and Octopus Deploy.
• Support and optimise application deployment in IIS and AWS environments.
• Analyse SQL performance and optimise queries for production workloads.
• Stay current with emerging Microsoft technologies and recommend best‑fit solutions.
• Mentor and coach engineers.
• Shape the future of our product stack as we transition to a decoupled, event‑driven architecture.
• Be part of a mission‑driven company committed to innovation, quality, and data‑driven insights.
• Work with a collaborative team where your input is valued and impactful.

Technical Skills

Core Technologies

• Expertise in C#
• Strong knowledge of .NET Framework 4.x and .NET Core 3.x
• Experience with ASP.NET Web Forms, ASMX Web Services, and MVC
• Familiarity with VB.NET (for legacy systems)

Infrastructure & DevOps

• Experience with AWS for hosting and infrastructure
• Skilled in IIS configuration and deployment
• Strong knowledge of TeamCity for CI
• Experience with Octopus Deploy
• Familiarity with Git for version control

UI & Front‑End

• Exposure to third‑party .NET UI libraries (e.g., Telerik)
• Basic understanding or hands‑on exposure to Angular (a plus)

Database

• Proficient in SQL Server
• Skilled in writing and optimising T‑SQL queries

Desired Experience & Approach

• Prior experience in a senior or lead .NET development role, preferably within a fast‑paced product or SaaS environment.
• Demonstrated ability to balance legacy maintenance with modern development practices.
• Experience designing and maintaining RESTful APIs within .NET.
• Strong communication skills with the ability to collaborate effectively across teams.
• Passion for engineering excellence and driving continuous improvement.
• Comfortable working independently and taking ownership of systems.

Benefits

• 24 days annual leave rising to 29 days
• Enhanced parental leave
• Medicash (Health Cash Plans)
• Wellness Days
• Flexible Fridays (Opportunity to finish early)
• Birthday day off
• Employee assistance program
• Travel loan scheme
• Charity days
• Breakfast provided
• Social Events throughout the year
• Hybrid Working

About the Company

With Intelligence is a leading provider of data and insights for the global asset management industry. We are scaling up our technological capabilities, harnessing the power of advanced data systems, AI, and modern cloud‑based infrastructure to build a flexible, event‑driven platform that supports our growing suite of digital products. We're assembling a top‑tier London‑based engineering team to lead this transformation. This role offers the opportunity to be a key contributor to our technology evolution, leveraging your deep .NET experience to influence product direction, mentor teams, and ensure our systems are robust, scalable, and modern.

Join Us

With Intelligence is based at One London Wall, London EC2Y 5EA. We offer amazing benefits, free breakfast daily and drinks provided all day, every day. We actively encourage social networks that oversee activities from sports, book reading to rock climbing, that you are free to join. As part of our company, you will enjoy the benefits of an open plan office and working with a social and energetic team. If you are interested so far in what you have read, please apply, we look forward to hearing from you.