Senior C# Developer

Clio; Greater London; Hybrid; GBP 82,000 - 110,000; Full time

Benefits offered by this job

Flexible hybrid work environment

25 days holiday + bank holidays

Private Healthcare with Life Insurance

Pension contribution

Professional development and growth

Clioversary recognition program

Job summary

Clio is seeking an experienced software engineer to join our team in London. You will help build and evolve our legal AI platform with C#, .NET, HTML/CSS, JavaScript, and SQL, delivering scalable features and high-performance data processing.

You will work in a hybrid environment, participate in architecture discussions, and help modernize components to .NET 8+ and Svelte. The role offers competitive pay, comprehensive benefits, and opportunities for growth through hands-on learning and

Qualifications

• Strong experience with C#/.NET, including async/await, memory management, and resource handling.
• Deep knowledge of SQL Server, including query optimization, indexing, execution plans, and performance tuning.
• Solid understanding of HTML5, CSS3, Flexbox, and CSS Grid.
• 5+ years of varied software engineering experience, ideally including scalable systems.
• Experience with distributed systems, monoliths, or microservices.
• Demonstrate a keen interest in improving your craft by using AI

Responsibilities

• Developing full-stack features using C#, .NET, HTML, CSS, JavaScript, and SQL.
• Writing and optimizing hand-crafted SQL queries to ensure high performance.
• Designing and implementing event-driven workflows using Event Store.
• Enhancing search and data projections with ElasticSearch.
• Modernizing components of the platform to .NET 8+ and Svelte.js, including containerized deployments.
• Automating infrastructure with Pulumi and Azure DevOps.
• Participating in architecture discussions, code reviews, and maintaining engineering best practices.

Skills

C# / .NET

SQL Server

HTML5 / CSS3

JavaScript

Distributed systems

Azure

Event Store

Elasticsearch

Neo4j

InfluxDB

Seq

Power BI

Pulumi

Azure DevOps

PetaPoco

Tools

ElasticSearch

Event Store

Neo4j

InfluxDB

Seq

Power BI

Pulumi

Azure DevOps

PetaPoco

Job description

Clio is the global leader in legal AI technology, empowering legal professionals and law firms of every size to work smarter, faster, and more securely.

We are transforming the legal experience for all by bettering the lives of legal professionals while increasing access to justice.

Who you are:

You are an experienced engineer who enjoys solving complex problems and delivering high-quality software. You value collaboration, curiosity, and learning as much as coding. You understand the importance of clean code, maintainable architecture, and system performance, and you want to work in a culture where your contributions matter and your growth is supported.

What you'll work on:

• Developing full-stack features using C#, .NET, HTML, CSS, JavaScript, and SQL.
• Writing and optimizing hand-crafted SQL queries to ensure high performance.
• Designing and implementing event-driven workflows using Event Store.
• Enhancing search and data projections with ElasticSearch.
• Modernizing components of the platform to .NET 8+ and Svelte.js, including containerized deployments.
• Automating infrastructure with Pulumi and Azure DevOps.
• Participating in architecture discussions, code reviews, and maintaining engineering best practices.

What you may have:

• Strong experience with C#/.NET, including async/await, memory management, and resource handling.
• Deep knowledge of SQL Server, including query optimization, indexing, execution plans, and performance tuning.
• Solid understanding of HTML5, CSS3, Flexbox, and CSS Grid.
• 5+ years of varied software engineering experience, ideally including scalable systems.
• Experience with distributed systems, monoliths, or microservices.
• Demonstrate a keen interest in improving your craft by using AI

Serious bonus points if you have:

• Exposure to ElasticSearch, Event Store, Neo4j, InfluxDB, Seq, Power BI.
• Experience with micro-ORMs such as PetaPoco.
• Contributions to open-source projects or personal coding projects.
• Cloud infrastructure experience, especially Azure.
• Strong grasp of clean code principles, OOP design, and software patterns.

What you will find here:

Compensation is one of the main components of Clio's Total Rewards Program. We have developed a series of programs and processes to ensure we are creating fair and competitive pay practices that form the foundation of our human and high-performing culture.

Some highlights of our Total Rewards program include:

• Competitive, equitable salary
• Clio offers a flexible hybrid work environment
• 25 days holiday + bank holidays
• Private Healthcare with Life Insurance & Critical Illness cover
• Pension contribution
• Professional development and growth options
• Clioversary recognition program with special acknowledgement at 3, 5, 7, and 10 years

The expected salary range for this role is £81,600 to £110,400 GBP. Initial placement within the range is informed by geographic region, experience, and skillset, with room to progress as impact and tenure grow. Final offer amounts will vary based on candidate profile.

Diversity, Inclusion, Belonging and Equity (DIBE) & Accessibility

Our team shows up as their authentic selves, and are united by our mission. We are dedicated to diversity, equity and inclusion. We pride ourselves in building and fostering an environment where our teams feel included, valued, and enabled to do the best work of their careers, wherever they choose to log in from. We believe that different perspectives, skills, backgrounds, and experiences result in higher-performing teams and better innovation. We are committed to equal employment and we encourage candidates from all backgrounds to apply.

Clio provides accessibility accommodations during the recruitment process. Should you require any accommodation, please let us know and we will work with you to meet your needs.

Learn more about our culture at clio.com/careers

We're a Human and High Performing AI company, meaning we use artificial intelligence to improve all of our operations. In recruitment, AI helps us streamline the process for greater efficiency. However, we've built our systems to ensure that a human always reviews AI-generated output, and we never make automated hiring decisions.

Disclaimer:

We only communicate with candidates through official @clio.com email addresses.