Lead Performance Engineer

Salary - £78,000 - £83,000

As a Lead Performance Engineer, you will focus on enabling engineering teams to build and operate performant, scalable, and stable systems by default. You will establish the approaches, standards, and shared tooling that help teams test systems under realistic and future load profiles, giving the organisation confidence that software and infrastructure can support ongoing growth and change. 

In this role, you will support multiple engineering teams by providing shared performance tooling, practical guidance, and best practices that allow teams to self-serve load testing, benchmarking, and regression detection within their domains. You will partner with teams on complex performance challenges where needed, influence architectural and technical design decisions through a performance lens, and raise overall performance maturity by embedding scalable, observable, and measurable practices across the engineering organisation. 

You’ll contribute to modern cloud-native software using the following Tech Stack  

• ASP.NET 
• .NET
• Entity Framework Core 
• SQL & SSMS 
• Blazor 
• Razor Pages 
• Bicep Infrastructure as Code
• Azure DevOps (Pipelines & Repos) 
• Azure Cloud Infrastructure 
• Azure App Services & Worker Functions 

We value curiosity, ownership, agile collaboration, and a willingness to learn.    

Responsibilities
 
As a Lead Performance Engineer at Inflo, you will:  

• Define and evolve the organisation’s performance engineering approach, helping teams apply consistent standards for scalability, latency, and throughput in their own services.
• Design, build, andmaintainshared performance tooling that enables teams to self-serve load testing, benchmarking, and regression detection.
• Embed performance testing and validation patterns into CI/CD pipelines so teams receive early, actionable feedback during development and release.
• Define andchampionpractical performance standards and non-functional requirements that can be adopted consistently across multiple engineering teams.
• Develop realistic load models and capacity planning approaches that help teams make informed decisions based on production usage, growth forecasts, and new feature demands.
• Establish and evolve performance-focused observability practices that enable teams to quicklyidentifyand diagnose bottlenecks under load.
• Partner with teams to influence system architecture and technical design decisions througha strong performance, scalability, and cost-efficiency lens.
• Coach and mentor scrum teams, building performance awareness, practical skills, and self-sufficiency across the broader engineering organisation.

Required/desired skills & qualifications  

Required:  

• Strong ability to write clear, efficient, and measurable code with a focus on performance and scalability.
• Strong technical design skills, with the ability to help teams evaluate and improve architectures against performance and load requirements.
• Deep understanding of performance engineering concepts, including load modelling, capacity planning, and bottleneck analysis.
• Experience designing performance testing, profiling, and benchmarking tooling for use across multiple teams, using tools such as JMeter, k6 or Gatling.
• Proven ability to diagnose complex performance issues acrossapplication, infrastructure, and external dependencies.
• Strong knowledge of observability practices, including metrics, logging, and distributed tracing for performance analysis.
• Experience integrating performance validation into CI/CD pipelines and automated quality gates.
• Excellent communication skills, with the ability to coach, influence, and enable teams to adopt stronger performance engineering practices.
• Solid understanding of Agile or Scrum delivery, and how to embed performance considerations into modern development workflows.
• Significant industry experience (typically 7+ years) delivering and supporting high‑traffic or complex software systems.

Desired: 

• BSc in Computer Science or a related field

 
Core values in action
 
We don’t just talk about our values - we live them in our work: 

• Science –You’ll apply evidence-based thinking, measure impact, and use data to inform decisions and validate progress.
• Ownership –You’ll take responsibility for your work, follow through on commitments, and proactively seek ways to improve outcomes.
• Openness –You’ll foster transparency in communication, share ideas freely, and welcome diverse perspectives to strengthen our solutions.
• Agility –You’ll embrace change, iterate quickly, and adapt to evolving requirements with confidence and creativity.

Success within the first 12 months
 
Within the first 12 months, success in this role will mean establishing and socialising a clear performance engineering approach, including standards, non-functional requirements, and success measures that engineering teams actively adopt; delivering shared performance tooling and repeatable test approaches that enable teams to self-serve load testing, benchmarking, and regression detection; embedding practical performance validation patterns into CI/CD pipelines for key services to provide earlier visibility of regressions before release; improving observability and diagnosis of performance issues under load so teams can identify bottlenecks more quickly and confidently; and raising performance maturity across the organisation through coaching, guidance, and measurable improvements in scalability, stability, and confidence under growth. 

The offer  
As an Inflo employee, you’ll enjoy the following benefits: 

• 7% Employer pension contributions providing you are a member of the scheme. 
• 25 days holiday + UK bank holidays, with anadditional0.5 days for every year of service.
• 4x Salary life assurance.
• Private medical insurance with Bupa.
• Medical cash back scheme (for optical, dental etc) 
• Flexible working environment – work whenever and wherever that suits you. AtInflowe measure results, not the amount of time you spend behind your laptop.
• Employee Referral scheme bonus of £1,000 
• Financial support to enhance your home working environment. 
• Opportunity to work from home as a fully remote role within the UK.
• Opportunity to meet Quarterly in Newcastle with an evening social.
• Invitation to our Annual Global Gathering.
• Continued professional development.