3x Senior C# / .NET Developer – Financial Technology (Risk & Financing Platforms)
Pay Rate: £600-£650 (Inside IR35 via umbrella)
Location: London – 3/4 days per week (with flexibility)
Duration: 6 Months (due to be extended)

A leading global financial institution is expanding its engineering group and is looking for experienced C# / .NET Developers to help build and enhance the technology that powers its risk, financing, and securities‑related platforms. This is a high‑impact role within a team responsible for systems that support critical exposure calculations, regulatory processes, and front‑to‑back financing workflows.

You’ll work closely with quantitative teams, risk specialists, and business stakeholders to deliver scalable, resilient solutions used across the organisation.

Responsibilities:

• Designing and developing robust C# / .NET services that underpin risk, collateral, and securities‑financing platforms
• Building and integrating RESTful APIs to connect with upstream and downstream systems
• Delivering clean, maintainable, object‑oriented code aligned with engineering best practices
• Supporting risk‑related workflows, including exposure calculations, limits monitoring, and reporting
• Working with large datasets and high‑throughput systems typical of institutional finance
• Participating in architectural discussions, design reviews, and technical planning sessions
• Collaborating with cross‑functional teams across Risk, Front Office, Operations, and Compliance
• Providing production support and contributing to incident analysis and resolution

Requirements:

• Advanced commercial experience with C# and modern .NET frameworks
• Background in Financial Services technology, ideally within risk, financing, or trading environments
• Strong grounding in object‑oriented design, clean coding practices, and scalable architecture
• Proven ability to design, build, and integrate RESTful APIs
• Solid experience working with SQL databases and optimising data‑driven applications
• Familiarity with automated testing, CI/CD pipelines, and modern development workflows

Reasonable Adjustments:

Respect and equality are core values to us. We are proud of the diverse and inclusive community we have built, and we welcome applications from people of all backgrounds and perspectives. Our success is driven by our people, united by the spirit of partnership to deliver the best resourcing solutions for our clients.

If you need any help or adjustments during the recruitment process for any reason, please let us know when you apply or talk to the recruiters directly so we can support you.

Java Software Developer

£600/day Inside IR-35 for an initial 6 months with extension likely

London – 3 days per week on site

Active SC Clearance essential

Reasonable Adjustments:

Respect and equality are core values to us. We are proud of the diverse and inclusive community we have built, and we welcome applications from people of all backgrounds and perspectives. Our success is driven by our people, united by the spirit of partnership to deliver the best resourcing solutions for our clients.

If you need any help or adjustments during the recruitment process for any reason, please let us know when you apply or talk to the recruiters directly so we can support you.

An excellent opportunity to join one of the UK’s leading software consultancies, renowned for its strong presence in the public sector while also delivering private and SC-cleared projects.

As a Senior Software Engineer, you will look to design, build, and deliver high‑quality software solutions using Java, Spring Boot, and micro services. You will work on complex projects, contribute to technical architecture, mentor junior engineers, and collaborate with cross‑functional teams across public and private sector programmes.

Key responsibilities include:
* Designing and developing scalable, secure software solutions
* Contributing to architectural decisions and technical direction
* Mentoring junior engineers and promoting best practices
* Working closely with Product, UX, DevOps, and QA teams
* Improving CI/CD pipelines, code quality, and testing standards.

What we are looking for:
* Strong hands‑on experience with Java, Spring Boot, and microservices
* Experience across the full software development lifecycle
* Knowledge of Agile and DevOps practices, CI/CD, and cloud platforms (AWS/Azure/GCP)
* Experience with containerisation (Docker/Kubernetes)
* Excellent communication and collaboration skills

Reasonable Adjustments:

Respect and equality are core values to us. We are proud of the diverse and inclusive community we have built, and we welcome applications from people of all backgrounds and perspectives. Our success is driven by our people, united by the spirit of partnership to deliver the best resourcing solutions for our clients.

If you need any help or adjustments during the recruitment process for any reason, please let us know when you apply or talk to the recruiters directly so we can support you.

React and TypeScript
Python
AWS services i.e. Athena/Glue, DynamoDB, ECS, S3, Lambda, SQS, Step Function, etc
Automated testing frameworks for Python and JavaScript
Terraform for infrastructure-as-code
Proven experience designing, building, and operating solutions on AWS cloud platforms, with a solid understanding of cloud-native services and architectures.
Strong working knowledge of CI/CD pipelines, with hands-on experience in automated testing and deployment practices to ensure quality and reliability.

Reasonable Adjustments:

Respect and equality are core values to us. We are proud of the diverse and inclusive community we have built, and we welcome applications from people of all backgrounds and perspectives. Our success is driven by our people, united by the spirit of partnership to deliver the best resourcing solutions for our clients.

If you need any help or adjustments during the recruitment process for any reason, please let us know when you apply or talk to the recruiters directly so we can support you.

Senior Django / Python Developer

Pay Rate: up to £700 (Inside IR35 – Umbrella)
Duration: 6 months’
Working arrangement: Once a every 3 months – London

We’re working on behalf of aFTSE 100 leading UK retailer, supporting the expansion of a highly successful AI‑driven Smart Pricing programme. Following strong results across well‑known UK household brands, the organisation is now extending this platform across its European operations and is looking for an experienced Senior Django / Python Developer to support the next phase of delivery.

This is a pure backend role, focused on scalable, high‑quality Python engineering within a data‑driven environment.

Responsibilities

• Develop and maintain backend services using Python and Django
• Contribute to a large‑scale AI pricing platform supporting multiple international brands
• Work closely with engineers, data scientists, and product stakeholders
• Deliver clean, maintainable, and performant backend code
• Participate in agile ceremonies and technical discussions

Required Skills

• Strong commercial experience with Python
• Extensive hands‑on experience with Django
• Excellent understanding of backend engineering fundamentals
• Experience working in agile delivery environments
• Comfortable producing production‑ready, well‑tested code

Reasonable Adjustments:

Respect and equality are core values to us. We are proud of the diverse and inclusive community we have built, and we welcome applications from people of all backgrounds and perspectives. Our success is driven by our people, united by the spirit of partnership to deliver the best resourcing solutions for our clients.

If you need any help or adjustments during the recruitment process for any reason, please let us know when you apply or talk to the recruiters directly so we can support you.

Software Engineer (PHP, Playwright, k6) – Mobile RASP & API Security Gateway
Pay Rate: £500-£550 (Outside IR35)
Duration: 6 months’
Working arrangement: Once a month – Bristol

We are currently working with an established financial services organisation operating in the investment and wealth management sector. The organisation is strengthening its mobile and API security capabilities and is seeking an experienced Contract Engineer to help deliver and operationalise a Mobile RASP and API Security Gateway solution.

This role is delivery‑focused and hands‑on, working across backend engineering, testing, security, and operational readiness in a regulated environment.

Responsibilities

• Design, develop, and maintain secure PHP‑based backend services and APIs
• Build and maintain automated end‑to‑end and functional test suites using Playwright or similar tools
• Execute and analyse performance and load tests using k6) to identify reliability, performance, and scalability risks
• Contribute to security‑focused initiatives, particularly in Mobile RASP, API security, and runtime protection
• Support the platform through rollout, steady‑state operation, and handover
• Collaborate closely with security, mobile, SRE, and platform engineering teams
• Produce clear, audit‑ready technical and operational documentation

Required Skills

• Strong PHP engineering experience
• Experience with Playwright
• Hands‑on experience with k6
• Experienceinsecurity‑focused engineering, Ideally including:
  • Mobile RASP, application security, API security, or runtime protection technologies (or ability to ramp up quickly)
  • Secrets, certificate pins, and lifecycle management
  • Certificate pin rotation
  • API key and secret lifecycle ownership
  • Break‑glass access procedures
  • Cross‑team coordination aligned with mobile release cadence
• Experience supporting systems in steady‑state production

Reasonable Adjustments:

Respect and equality are core values to us. We are proud of the diverse and inclusive community we have built, and we welcome applications from people of all backgrounds and perspectives. Our success is driven by our people, united by the spirit of partnership to deliver the best resourcing solutions for our clients.

If you need any help or adjustments during the recruitment process for any reason, please let us know when you apply or talk to the recruiters directly so we can support you.

Our client, a leading consultancy, is looking to hire a mobile developer with solid experience building and maintaining iOS applications.

The successful applicant will have experience using Swift or Objective-C.

You will work closely with Product, Design, Backend, QA and DevOps teams to deliver new features and resolve ongoing issues. You will also ensure overall app performance, quality and security.

Candidates should be comfortable managing their own workload, contributing to code reviews and architecture discussions and keeping up to date with the latest iOS technologies and Apple guidelines.

Engagement via Umbrella Company Only; all taxes & NI deducted at source.

Reasonable Adjustments:

Respect and equality are core values to us. We are proud of the diverse and inclusive community we have built, and we welcome applications from people of all backgrounds and perspectives. Our success is driven by our people, united by the spirit of partnership to deliver the best resourcing solutions for our clients.

If you need any help or adjustments during the recruitment process for any reason, please let us know when you apply or talk to the recruiters directly so we can support you.

Cyber Software Engineer – National Security

Reasonable Adjustments:

Respect and equality are core values to us. We are proud of the diverse and inclusive community we have built, and we welcome applications from people of all backgrounds and perspectives. Our success is driven by our people, united by the spirit of partnership to deliver the best resourcing solutions for our clients.

If you need any help or adjustments during the recruitment process for any reason, please let us know when you apply or talk to the recruiters directly so we can support you.

Reasonable Adjustments:

Respect and equality are core values to us. We are proud of the diverse and inclusive community we have built, and we welcome applications from people of all backgrounds and perspectives. Our success is driven by our people, united by the spirit of partnership to deliver the best resourcing solutions for our clients.

If you need any help or adjustments during the recruitment process for any reason, please let us know when you apply or talk to the recruiters directly so we can support you.

Front Office C# Developer – Commodities Derivatives
Day Rate: Up to £750/day (Umbrella)
Duration: 6 months initially
Location: Marylebone – London
Working Arrangement: Hybrid – 3 days per week onsite

We’re looking for a Front Office C# Developer to join a London‑based leading Global Markets business team supporting the end‑to‑end Commodities Derivatives trading platform panning pre‑trade, pricing, risk, and post‑trade through to accounting.

Key Responsibilities

• Design and develop core functionality for the Commodities Derivatives platform.
• Deliver enhancements across pricing, risk, regulatory and post‑trade services.
• Ensure platform stability through robust testing and release control.
• Follow team standards for code review, deployment and architectural governance.

Essential

• Strong commercial experience with C#
• Solid SQL Server experience
• Background working on complex, business critical platforms
• Experience with commodities and/or derivatives products
• Organised, delivery‑focused, and comfortable working with a high degree of autonomy

Desirable

• Exposure to microservices architectures
• Familiarity with technologies such as Redis, Consul, Octopus Deploy, TeamCity, or modern web technologies

Reasonable Adjustments:

Respect and equality are core values to us. We are proud of the diverse and inclusive community we have built, and we welcome applications from people of all backgrounds and perspectives. Our success is driven by our people, united by the spirit of partnership to deliver the best resourcing solutions for our clients.

If you need any help or adjustments during the recruitment process for any reason, please let us know when you apply or talk to the recruiters directly so we can support you.