Exciting opportunity at one of the fastest growing financial services firms around the world. They offer prime brokerage, clearing and financing across traditional and digital assets, and are now looking to hire world-class software engineers to help build on their success.

Responsibilities

• Help build out the data ingestion / query framework to add functionality and improve performance, scalability, robustness and ease of use
• Integrate new sources of pricing data
• Build visualization / UI tools to extend visibility and control of market data systems outside of the DS pod

Skills & Experience Required

• Minimum 5+ years’ experience developing large-scale or low-latency systems, preferably at a top-tier financial services firm
• Experience with market data or trading infrastructure
• BS degree or above in Computer Science, Mathematics, or related field
• Proficiency with these relevant technologies: asyncio, Kafka, time series databases

Whilst we carefully review all applications, to all jobs, due to the high volume of applications we receive it is not possible to respond to those who have not been successful.

Contact
If you feel you are suitable for this role, drop me an email or give me a call!

Jack Peck
[e] jack.peck@oxfordknight.co.uk
[t] +44 20 3745 6537
linkedin.com/in/jack-peck-448a70131

Contract Full-Stack JavaScript Developer (AI Platform)
Location: 3 days per week in London Office
Duration: 4 weeks with a longer term extension afterwards.
IR35 Status: Outside IR35
Rate: £500p/d – £600p/d Opus is partnering with a cutting-edge FinTech start-up to secure a Contract Full-Stack JavaScript Developer. You’ll be joining a small, high-calibre team building a platform to improve workflows within the the FinTech space. They have a genuinely interesting problem at the intersection of frontend engineering, backend systems, and applied LLM tooling. This is a true 0–1 build, ideal if you enjoy ownership, clean abstractions, and shipping product quickly. What You’ll Be Working On Building and extending agent-driven workflows.
Developing context management and LLM entry points. Only application-layer LLM integrations, not model training)
Expanding slide generation functions and data structures.
Full-stack feature development, with a frontend-heavy bias
Collaborating closely with product and engineering stakeholders in a fast-moving environment
️ Tech Stack Next.js
TypeScript
Tailwind CSS
Node.js
PostgreSQL
Claude Agent SDK
Pydantic
AWS
Terraform
Modal Sandboxes
Interested?
Apply now or send your latest CV to (url removed) ASAP!
If you haven’t heard back within 48 hours, please assume your application was not successful this time

C# .NET Developer (C#, .NET, Azure) – High profile and Government projects with progression into leadership Offices throughout the UK - hybrid role 1-2 days per week in the office. A C# .NET Developer (C#, .NET, Azure) is required by a well-established consultancy delivering secure, high-impact solutions across Central Government and enterprise environments. This C# .NET Developer (C#, .NET, Azure) role sits within a collaborative Agile team working on modern Microsoft technologies, with strong engineering standards and real project ownership.
To be considered for this C# .NET Developer (C#, .NET, Azure) position, you should have: Strong commercial experience with C# and modern .NET / .NET Core
Experience with Azure development and Azure DevOps (CI/CD)
Experience with SQL Server or Entity Framework and API development
Good understanding of dependency injection, performance, and secure coding
Strong communication skills and stakeholder engagement experienceThis C# .NET Developer (C#, .NET, Azure) opportunity will accelerate your development, giving you exposure to a range of projects rather than a single system. You’ll work alongside experienced engineers and have a clear route into Project Leadership as you progress. Day to day, as a C# .NET Developer (C#, .NET, Azure), you’ll operate within an Agile team, picking up tickets and delivering high-quality solutions. You’ll build and enhance Azure-hosted applications using C# and .NET, ensuring performance and security are prioritised. You’ll also engage with stakeholders, including Central Government clients, contributing to technical discussions and problem-solving as part of a wider team. Salary £50,000 – £60,000
Hybrid working (1–2 days onsite, more if based near London, Reading or Manchester)
Offices in London, Reading, and Manchester
Work on Central Government projects
Clear progression into leadership
Strong team environment with experienced developersIf you’re a C# .NET Developer (C#, .NET, Azure) looking to deepen your Microsoft stack expertise and work on secure, large-scale systems, this is a strong opportunity.
Get in touch now

Our client is in the Financial Sector and is looking to grow the team with a new Senior Developer. This role can be done remote with weekly meet ups in Central London on a Wednesday. The technology function is around 80 people total and you will work in an Agile team of 8. Client Details Our client is in the Financial Sector and is looking to grow the team with a new Senior Developer. This role can be done remote with weekly meet ups in Central London on a Wednesday. The technology function is around 80 people total and you will work in an Agile team of 8. Description Design, develop, and maintain software applications to meet project requirements.
Collaborate with cross-functional teams to deliver technical solutions in a timely manner.
Conduct code reviews to ensure high-quality standards are met.
Analyse and resolve technical issues, providing effective solutions when required.
Contribute to the improvement of development processes and methodologies.
Stay updated with the latest trends and technologies in the professional services industry.
Mentor junior developers and share best practices within the team.
Ensure compliance with industry standards and company guidelines in all development tasks.Profile This role is a largely hands on coding but there will be an element of mentoring juniors, helping to review code, working with Business Analysts and Product Managers to understand business requirements Must haves: C#
Azure
SQL
Angular
Mentoring experience
UK work experienceNice to haves: Certifications
K8s
Docker
Azure Service Bus, Logic Apps, Functions AppsJob Offer Car allowance of 5k
Private medical
25 days + BHS
Option to buy 10 more holidays
Matched pension
Life assurance

JML JobMatcha are currently looking for Contract Digital Solutions Engineers Locations: Horsham or Watford
Duration: 3–6 months
⏱ Hours: Standard office hours (initially office-based)
Rate: £450–£500 per day Role Overview: We are seeking one or two experienced Digital Solutions Engineers to support a growing digital pipeline. You will work alongside an established team to develop and support a range of internal applications and platforms. This role will be primarily office-based to begin with, with some flexibility for remote working once established. Key Responsibilities: * Supporting the development and maintenance of digital solutions * Working with SharePoint (Online and On-Premise) * Developing and supporting Microsoft Power Platform solutions * Assisting with applications and services within Microsoft 365 * Collaborating with internal teams to deliver efficient digital tools Requirements: * Proven experience in a similar Digital Solutions / Engineer role * Strong knowledge of SharePoint (Online & On-Premise) * Experience with Microsoft Power Platform (Power Apps, Power Automate, etc.) * Good understanding of Microsoft 365 environments * Strong problem-solving skills and ability to work within a team

Lead Full Stack Next.js / React Developer
Location: UK-based, Hybrid or Remote Position Overview: We are looking for a Lead Full Stack Next.js / React Developer to help design and build greenfield modern, high-performance web applications that power our client platforms and internal tools. You will work across the stack from frontend user experiences in Next.js to backend APIs, databases, and cloud infrastructure, helping to create resilient, scalable systems. If you’re excited by building elegant user interfaces, designing robust APIs, and working in a cloud-native environment where you can influence technical direction, this role offers a chance to shape both our platform and engineering culture.
chance to shape both our platform and engineering culture. Key Responsibilities
Design, develop, and maintain production-grade web applications using Next.js and React.
Collaborate closely with product and other engineering teams to translate requirements into scalable solutions.
Take ownership of features from concept through deployment and ongoing operation.
Ensure applications are performant, accessible, secure, and maintainable.
Participate in code reviews and mentor other engineers.What You’ll Bring
5+ years of professional software development experience.
Strong experience with Next.js, React, and TypeScript.
Strong advocate for and power user of LLM-enabled development tools such as Claude
Experience building RESTful and/or GraphQL APIs.
Understanding of server-side rendering (SSR), static site generation (SSG), and modern frontend performance optimisation.
Experience with SQL and/or NoSQL databases.
Cloud experience (AWS preferred) and familiarity with containerisation (Docker).
Strong understanding of web fundamentals (HTTP, DNS, TCP/IP).
Strong problem-solving skills and ability to work with evolving requirements.
Lead a team of experienced Software Engineers Nice to Have
Backend experience in Go and/or C#
Experience with microservices architecture.
Familiarity with infrastructure as code (e.g., Terraform, CloudFormation).
Experience with CI/CD pipelines and DevOps principles.
Experience with authentication/authorization systems (OAuth, JWT, SSO).
Exposure to data-heavy or high-scale systems.
Experience in intellectual property, brand protection, or compliance-driven industries.Details: Up to £110,000
Permaanent role Hybrid position

Backend Engineer Salary: Up to £75k (DoE) * Hybrid: 1 day/week in London * No sponsorship offered I’m recruiting on behalf of a fast‑growing accounting‑tech startup that builds automation and AI tools for in‑house finance teams. The company has strong traction and is expanding its engineering team. Role Overview Develop and maintain backend services powering automation features
Work closely with product and leadership in a fast‑paced startup environment
Rapidly prototype ideas and help scale them into reliable production systems
Occasionally contribute small frontend updates (React/TypeScript) Tech Requirements Must have: Java or Kotlin, Spring Boot
MySQL, OpenSearch, AWS
Nice to have: Groovy, Ruby on Rails, React/TypeScript Candidate Profile Several years’ backend engineering experience
Prior startup experience strongly preferred
Strong problem‑solving mindset
Comfortable working independently and collaboratively
Must already have the right to work in the UK (no sponsorship) Benefits Share options
25 days holiday + bank holidays
Personal learning & development budget
High‑impact role in a small, scaling team Services advertised by Gold Group are those of an Agency and/or an Employment Business.
We will contact you within the next 14 days if you are selected for interview. For a copy of our privacy policy please visit our website

Avanti is working with an exciting early-stage fintech startup based in London that is about to launch its first product in the embedded finance space. Their platform helps businesses unlock working capital through intelligent, AI-driven invoice financing solutions, integrated directly into existing financial workflows. With launch just around the corner, they are now looking for a Mid-Level Fullstack Developer to join their growing team. THE ROLE This is not a typical developer role. You’ll be working across both technology and business operations, giving you a unique opportunity to understand how a fintech company is built from the ground up. You’ll be responsible for: \* Building and maintaining fullstack applications \* Developing APIs and working with databases \* Contributing to frontend and backend development \* Supporting AI-driven features and data workflows \* Debugging, testing, and improving system performance \* Working closely with the business to help automate operational processes TECH STACK \* .NET (backend) \* React (frontend) \* MySQL \* AWS \* Python (AI and data models) Experience Required \* Around 2+ years of experience in software development \* Experience across frontend and backend development (.NET / React) – Angular / Vue is fine \* Good understanding of software engineering fundamentals \* Interested in working in a startup / Have startup experience \* AWS exposure (similar cloud is fine) \* Interested in AI Why Join? \* Join a startup at launch stage \* Work on AI-driven fintech products \* Gain exposure beyond coding into real business operations \* Fast-track your development with hands-on experience \* High visibility and real impact from day one Salary is up to £50,000 and you will be required on-site 4 days per week in Central London. If interested then click Apply Now

Job Title: Senior Full Stack Developer (React & C#.NET)
Contract Length: 12 Months
Location: London - 3 Days a week
Daily Rate: Circa 650/Day (Inside IR35)

About the Role
Join our dynamic team as a Senior Full Stack Developer, where your expertise in React JS and C# .NET Core will shine! We are looking for a tech-savvy professional with a passion for building scalable applications within the financial sector. This is an exciting opportunity to work with cloud-native architectures and cutting-edge technologies. If you thrive in a collaborative environment and are eager to make an impact, we want to hear from you!

Technical Skills

• Front-end: Strong proficiency in React.js, JavaScript/TypeScript, Redux/RTK, and modern UI patterns, develop framework is essential
• Back-end: Expertise in C# .NET Core, REST APIs, and microservices-based development is essential
• Python (pyspark): Experience with data pipelines and analytics is a plus.
• Power BI: Familiarity with developing dashboards and data models.
• Architecture: Knowledge of microservices, API design, and event-driven architectures.
• DevOps/CI/CD: Experience with Azure DevOps, GitLab, GitHub Actions, or similar tools.
• Cloud Platforms: Proficient in Azure or AWS (Azure preferred).
• Databases: Strong skills in SQL Server, PostgreSQL, or other relational databases.
• containerisation: Experience with Docker and Kubernetes.

Key Responsibilities

• Design & Develop: Create and maintain full stack applications using React JS and C#.NET Core.
• Build Services: Develop high-performance backend services and RESTful APIs with a focus on scalability and resilience.
• Create UI Components: Craft responsive and modular UI components using React JS and modern JavaScript/TypeScript patterns.
• Collaboration: Work closely with business stakeholders and domain experts in Risk, Regulatory Reporting, and Finance.
• Power BI Expertise: utilise your knowledge of Power BI to develop dashboards and analytical reports.
• CI/CD Implementation: Collaborate with DevSecOps to optimise CI/CD pipelines, ensuring automated testing and deployment.
• Architecture Contribution: Contribute to event-driven and distributed system designs using technologies like Kafka or Event Hub.
• Mentorship: Guide junior developers and foster a collaborative atmosphere within a cross-functional agile team.

Soft Skills

• A strong engineering mindset with a relentless curiosity.
• Excellent analytical and problem-solving abilities.
• Exceptional communication skills to interact with both technical and non-technical stakeholders.
• An agile mindset with experience in Scrum/Agile environments.
• Ability to work independently and lead technical solutions from start to finish.

Why Join Us?

• Work on innovative projects that make a difference in the financial sector.
• Collaborate with a talented team in a vibrant environment.
• Enjoy a competitive daily rate and flexible working arrangements.

If you are ready to take your career to the next level and contribute to exciting projects, apply now! We can’t wait to meet you!

Pontoon is an employment consultancy. We put expertise, energy, and enthusiasm into improving everyone’s chance of being part of the workplace. We respect and appreciate people of all ethnicities, generations, religious beliefs, sexual orientations, gender identities, and more. We do this by showcasing their talents, skills, and unique experience in an inclusive environment that helps them thrive. If you require reasonable adjustments at any stage, please let us know and we will be happy to support you.

GenAI Full Stack Engineer Location: London (Hybrid, 2 days per week in office) Salary: £45,000 to £55,000 + Benefits Type: Permanent About the Company We are partnering with a leading digital transformation and technology consultancy that helps organisations solve complex business challenges through cutting edge technology, AI and data driven solutions. This is an exciting opportunity to join a growing team focused on building next generation GenAI applications and scalable full stack solutions. The Role As a GenAI Full Stack Engineer, you will play a key role in designing, building and scaling AI powered applications. You will work across the full development lifecycle from proof of concept through to production deployment. You will build Generative AI proof of concepts using modern frameworks and tools and scale prototypes into production ready applications. You will design and develop full stack applications across both GenAI and traditional software projects. Required Skills and Experience Backend development using Python with FastAPI or TypeScript with Node.js or Express Experience building microservices architectures React and TypeScript front end development experience Familiarity with Next.js or Vite Experience with Generative AI frameworks such as LangChain, LangGraph or CrewAI Experience working with Large Language Models such as OpenAI, Anthropic, Llama or Mistral Exposure to Retrieval Augmented Generation or AI agents is beneficial Experience with AWS or Azure Docker and containerisation experience, Kubernetes beneficial Experience with CI CD pipelines using GitHub, GitLab or Jenkins Eligibility Must be eligible to work in the UK Must be eligible for UK Security Clearance Apply now to learn more

Principal Full Stack Software Engineer

Location: Hybrid - 1-2 days a week

Salary: (Apply online only)k + 10% Bonus

Type: Permanent

No Sponsorship Available

Overview:

We are seeking a Principal Full Stack Software Engineer to lead the design, development, and delivery of scalable, high-performance applications across a modern cloud-based architecture. This is a senior, hands-on leadership role where you will shape technical direction, influence engineering standards, and drive best practice across the full software development lifecycle. You will work closely with product, architecture, and leadership teams to deliver robust, user-centric solutions while mentoring engineers and fostering a high-performing engineering culture.

Key Responsibilities:

• Lead end-to-end design and development of full stack applications across frontend and backend systems
• Define and drive engineering best practices, coding standards, and architectural principles
• Act as a technical authority across multiple teams, guiding complex solution design and delivery
• Build scalable, secure, and high-performing systems using modern frameworks and cloud technologies
• Collaborate with Product Owners and stakeholders to translate business requirements into technical solutions
• Mentor and coach engineers, supporting career development and technical growth
• Drive adoption of DevOps practices, CI/CD pipelines, and automated testing frameworks
• Contribute to strategic technology decisions and long-term roadmap planning
• Ensure high levels of system reliability, performance, and security

Required Skills & Experience:

• Extensive experience as a Full Stack Engineer with a strong track record in senior or principal-level roles
• Expertise in JavaScript/TypeScript and modern frontend frameworks (e.g., React, Angular, or Vue)
• Strong backend development experience (e.g., Node.js, Java, Python, or Go)
• Proven experience designing and building scalable, distributed systems
• Strong experience with REST APIs, microservices architecture, and event-driven systems
• Cloud experience with Azure with knowledge of serverless and containerised architectures
• Solid understanding of DevOps practices, CI/CD, and infrastructure as code
• Experience working in Agile environments and leading technical delivery
• Strong stakeholder engagement and communication skills

Desirable Experience:

• Knowledge of data engineering or real-time data processing pipelines
• Exposure to system design at enterprise scale
• Experience working in regulated environments such as financial services

Benefits:

• Competitive base salary and performance bonus
• Flexible hybrid working model
• Private healthcare and enhanced pension
• 25 days annual leave + additional benefits
• Learning and development budget
• Opportunity to shape engineering strategy within a growing organisation

Our client is in the Financial Sector and is looking to grow the team with a new Senior Developer. This role can be done remote with weekly meet ups in Central London on a Wednesday. The technology function is around 80 people total and you will work in an Agile team of 8.

Client Details

Our client is in the Financial Sector and is looking to grow the team with a new Senior Developer. This role can be done remote with weekly meet ups in Central London on a Wednesday. The technology function is around 80 people total and you will work in an Agile team of 8.

Description

• Design, develop, and maintain software applications to meet project requirements.
• Collaborate with cross-functional teams to deliver technical solutions in a timely manner.
• Conduct code reviews to ensure high-quality standards are met.
• Analyse and resolve technical issues, providing effective solutions when required.
• Contribute to the improvement of development processes and methodologies.
• Stay updated with the latest trends and technologies in the professional services industry.
• Mentor junior developers and share best practices within the team.
• Ensure compliance with industry standards and company guidelines in all development tasks.

Profile

This role is a largely hands on coding but there will be an element of mentoring juniors, helping to review code, working with Business Analysts and Product Managers to understand business requirements

Must haves:

• C#
• Azure
• SQL
• Angular
• Mentoring experience
• UK work experience

Nice to haves:

• Certifications
• K8s
• Docker
• Azure Service Bus, Logic Apps, Functions Apps

Job Offer

• Car allowance of 5k
• Private medical
• 25 days + BHS
• Option to buy 10 more holidays
• Matched pension
• Life assurance

Dynamics 365 Developer - sought by leading pensions provider in London/Belfast - Hybrid - Contract

*Inside IR35 - umbrella\

Key Responsibilities

Dynamics 365 Development & Configuration

• Design, configure, and customise Dynamics 365 (Sales) entities, forms, views, dashboards, and business process flows
• Extend platform capability through plugins, workflows, JavaScript, Power Platform components, and Azure integrations
• Define and implement best-fit technical solutions aligned to existing architecture and business processes
• Lead end-to-end development of Dynamics 365 CRM solutions

Integration, Data & Environments

• Build and manage integrations with Microsoft 365, external systems, and APIs
• Support data migration, upgrades, and deployment activities across environments
• Implement and maintain security roles, permissions, and environment governance
• Manage solutions across the full application lifecycle (build, release, support)

Delivery & Quality

• Work closely with Business Analysts and delivery teams to translate functional requirements into scalable, maintainable solutions
• Plan, estimate, design, develop, and implement solutions in line with agreed delivery plans
• Troubleshoot, optimise, and enhance existing CRM functionality
• Resolve complex technical issues while maintaining high engineering standards
• Adhere to quality assurance controls to improve solution quality and streamline releases

Collaboration & Adoption

• Collaborate with business teams (e.g. Business Development, Marketing, Operations) to ensure solutions meet real operational needs
• Provide technical guidance and advice to colleagues and delivery partners
• Contribute to technical documentation, standards, and knowledge sharing
• Support Dynamics 365 adoption through well-engineered, user-focused solutions
• Continuously develop product and technology knowledge to ensure best-practice delivery

Required Experience & Skills

Essential

• Proven hands-on experience delivering Microsoft Dynamics 365 CE / Power Platform solutions
• Experience delivering Dynamics 365 migrations and upgrades, particularly within Dynamics Sales
• Strong understanding of the Microsoft technology stack
• Experience developing and configuring Dynamics workflows and business processes
• Hands-on experience building custom Dynamics 365 applications
• Experience working in Agile / DevOps delivery environments
• Strong communication and stakeholder collaboration skills
• Eligibility for Security Clearance

Desirable

• Experience with Power Platform (Power Automate, Power Apps, Power BI)
• Experience with the wider Microsoft 365 ecosystem (SharePoint, Teams)
• Experience integrating Dynamics with APIs or third-party systems
• Experience using Azure DevOps for backlog, delivery, and release management
• Experience delivering enterprise-scale CRM solutions
• Ability to deliver technical training or enablement sessions
• Experience running developer forums, drop-in sessions, or capability-building initiatives

Please apply within for further details - Matthew Holmes, Harvey Nash

Always use these settings

Ruby on Rails Developer

Hybrid work 2/3 days onsite per month

We are seeking an experienced Ruby on Rails Developer to join our clients growing engineering team. This is an exciting opportunity for a passionate developer who thrives in dynamic environments and enjoys solving complex technical challenges. You will play a key role in designing, building, and maintaining high-performing, scalable applications that directly impact our customers and business operations.

In this role, you’ll work closely with cross-functional teams to develop new features, enhance existing systems, and ensure our platform remains stable and efficient. Your deep understanding of Rails architecture, PostgreSQL optimisation, and API design will be essential as you contribute to ongoing development projects.

If you enjoy collaborating in Agile/Scrum environments, value clean code, and are eager to work with modern tooling, cloud services, and containerised deployments, we’d love to hear from you.

Key Skills

• 4+ years’ experience with Ruby on Rails
• Strong understanding of OOP & Rails architecture
• Extensive experience with PostgreSQL (performance tuning, complex queries)
• Background job processing with Sidekiq & Redis
• Expertise in RESTful APIs, JSON, JWT, SSO
• Experience with AWS & Docker
• Production system support & troubleshooting
• Strong communication skills & Agile/Scrum experience

Ruby on Rails Developer

Due to the volume of applications received for positions, it will not be possible to respond to all applications and only applicants who are considered suitable for interview will be contacted.

Proactive Appointments Limited operates as an employment agency and employment business and is an equal opportunities organisation

We take our obligations to protect your personal data very seriously. Any information provided to us will be processed as detailed in our Privacy Notice, a copy of which can be found on our website

Required Skills & Experience 25 years of experience in OutSystems development (Traditional or Reactive Web / Mobile). Strong understanding of low-code application architecture and lifecycle. Experience with integrations (REST, SOAP, OAuth, SQL, message queues). Basic understanding of CSS, JavaScript, and relational databases (SQL Server, Oracle). Knowledge of application security, performance tuning, and scalable app design.
Job Description:Mandatory Skills: OutSystems
OutSystems Developer (Low-Code Orchestration)Role OverviewThe OutSystems Developer focuses on building scalable, secure, low code applications and workflow orchestrations using the OutSystems platform. The role blends business process understanding with application design, integrations, and front end/back end logic to deliver enterprise-grade solutions.________________________________________Key Responsibilities1. Application & Workflow Development Build responsive web and mobile applications using OutSystems Service Studio. Design workflow orchestrations, process automation, and data models. Develop logic, integrations, and reusable UI patterns and modules. Implement role-based access, security configurations, and performance optimisations.2. Integration & API Management Integrate with backend systems (REST/SOAP APIs, databases, SAP, CRM). Build and maintain integrations ensuring reliability and security. Design asynchronous flows, event-driven architectures, and external data connectors.3. Testing, Deployment & DevOps Conduct unit and integration testing. Troubleshoot performance issues and fix defects across environments. Support deployments using LifeTime, CICD pipelines, and environment promotions. Work with cross functional teams on release planning and hypercare.4. Governance, Documentation & Best Practices Document architecture, modules, APIs, and change logs. Ensure adherence to OutSystems development standards and performance guidelines. Participate in code reviews, architecture discussions, and solution workshopsGood to Have OutSystems certifications (Associate, Professional, Tech Lead). Knowledge of cloud-native deployments and microservices patterns. Experience in Agile / DevOps and CI/CD integration for OutSystems

Location: London, UK

Industry: Investment Banking

Work pattern: Hybrid (2/3 days onsite)

We’re looking for an experiencedBackend Developer to join a leadinginvestment bank and help drive innovation that empowers people and businesses across Asia, Africa, and the Middle East. This role is part of the Blade function, delivering strategic initiatives that make a real impact. Prior banking experience is highly desirable.

The Key Responsibilities

As a senior developer, you’ll be driving our platform forwards and delivering quality solutions to business-critical customer requirements. Based in London, you will collaborate in a dynamic global team with fellow technologists, business analysts, project managers and business stakeholders across multiple locations.

Key Attributes

• An excellent Java developer with good software design principles and the ability to write robust code and accompanying test suites
• Ability to write efficient, clear code and be able to articulate what has been implemented and why
• Self-starter who can drive/facilitate requirements and development effort
• Take ownership and responsibility for the full development life cycle
• Experience working in an agile development environment
• A team player, capable of engaging with other teams
• Experience in the end-to-end design, development and support of financial markets systems
• Experience with Real Time (event-driven) architectures
• Being a full-stack web developer is a plus

Technical skills:

• 5+ years hands on development with investment banking.
• E-trading- FX/FI experience is must
• Core Java (essential), Concurrency, Spring
• RX Java is a plus
• Experience in micro-services and container technologies (preferably Docker) is a plus
• Familiarity with CI/CD and DevOps
• Experience with distributed data stores a plus
• Functional programming experience a plus

Functional skills:

• Financial Market domain knowledge
• Investment banking is a strong plus
• Derivatives knowledge is a plus

Soft skills:

• Fluent in English (speaking and writing)
• Strong ownership and ability to deal with ambiguity
• Outstanding problem-solving skills
• Proactive, self-starter, autonomous
• Good team spirit

Rate:GBP 700 - 750/day (negotiable)

PAYE inside IR35 (Annual leave: 38 days including Bank Holidays + 3% Pension + 15% Employees NI)

Full Stack Engineer - Python/Rust & React

We’re partnering with a well‑capitalised, globally active hedge fund to hire a Full Stack Engineer into a high‑impact portfolio systems team. This group builds and owns the firm’s core transaction and position ledger - critical infrastructure used daily by portfolio managers and trading teams across multiple asset classes.

This is a true full‑stack role: backend services, event‑driven architecture, and a React/TypeScript frontend, all in production and close to the investment workflow.

What You’ll Be Working On

• Designing and owning high‑performance, multithreaded backend services in Python, C#, or Rust
• Building event‑driven, service‑oriented systems using Kafka or Kinesis
• Developing React/TypeScript UIs used directly by trading and operations teams
• Deploying and operating cloud‑native, serverless infrastructure on AWS
• Working across SQL Server, Postgres, and Snowflake for transaction data and analytics

What They’re Looking For

• 5-15 years of experience in a production, enterprise engineering environment, with recent experience in finance
• Strong backend fundamentals in Python, C#, or Rust
• Proven ability to work end‑to‑end across the stack, including React (mandatory) and TypeScript
• Production exposure to cloud platforms (AWS or Azure)
• Bachelor’s degree or higher in Computer Science, Engineering, or a STEM discipline from a strong academic institution

If you’re a full stack engineer, with experience in finance, looking for real ownership, technical depth, and direct impact on how capital is managed, this is well worth a conversation. Apply for more information.

Job description:

• Help traders to analyze and visualize their trading activities
• Work with trading and engineering to prototype, test, and integrate pricing and quoting models
• Contribute to core trading infrastructure: data ingestion, analytics, and monitoring
• Perform empirical research, back testing, and performance analysis using historical and real-time trading data
• Design, develop, and maintain user-friendly interfaces (UIs) for our analytical, monitoring and control applications
• Use AI and modern ML tools (including LLMs) to accelerate development, improve prediction, and enrich tooling

Requirements:

• Undergraduate or Graduate Degree in Computer Science, Engineering, or a related field
• At least 3 years or more of experience in software development, ideally in a high-paced trading environment
• Strong software engineering skills in python and typescript/React.js with experience writing robust, performant and scalable code
• Self-driven, motivated, responsible and highly responsive individual
• Ability to work effectively in a fast-paced trading environment
• Able to deliver working projects and solutions effectively and quickly
• Basic understanding of financial markets and trading workflows
• Able to balance theory with practical implementation under real-time constraints

Preferred / Desirable Experience

• Familiarity with crypto, FX, or futures trading and market making
• Familiarity with pricing models and risk analytics
• Understanding of order book dynamics, liquidity provision, and latency-sensitive systems
• Practical experience with data analysis, time series, and statistical learning
• Hands-on experience in a trading firm, hedge fund, or market-making environment, ideally with exposure to traders or risk managers
• Exposure to cloud computing, containers (Docker), or distributed systems
• Working knowledge of machine learning, AI assistants, and/or LLM integration for code generation, data summarization, or signal extraction

Wishes:

If you have experience/background working in the area of gaming/gambling this is highly preferred.

Discover your future at Citi
Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact.

Job Overview
Full Stack Engineer (C#/WPF UI) - VP

Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance - we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech.

What We do in Equities Tech
Equities Technology at Citi is undertaking a bold, multi-year transformation to build a best-in-class global platform across execution, prime, clearing and cross-product margining. We are re-engineering our technology estate to achieve world-leading performance and resiliency, enabling new capabilities in advanced execution, global market connectivity, and modernised post-trade, clearing and margin processes. Our ambition is to deliver a seamlessly integrated, highly automated platform that drives outstanding client outcomes and accelerates growth across our global franchise. As part of the team, you’ll collaborate closely with high-calibre engineers and deeply engaged business and product partners - working together to define and deliver the next generation of Equities technology at Citi.

The Team
The Equity Finance Technology team are seeking a development role for the User Interface, located in Belfast. The role requires working with technologists across geographical locations and executing on the technical delivery. The successful candidate must exhibit strong technical skills with a proven ability to deliver using an agile methodology.

Responsibilities:

• Provide technical direction for a team of developers located across locations
• Ability to forecast technical advances and innovation for the user interface
• Code review of development conducted by others
• Resolve variety of high impact problems/projects through in-depth evaluation of complex business processes, system processes, and industry standards
• Provide expertise in area and advanced knowledge of applications programming and ensure application design adheres to the overall architecture blueprint
• Utilise advanced knowledge of system flow and develop standards for coding, testing, debugging, and implementation
• Develop comprehensive knowledge of how areas of business, such as architecture and infrastructure, integrate to accomplish business goals
• Provide in-depth analysis with interpretive thinking to define issues and develop innovative solutions
• Serve as adviser or coach to mid-level developers and analysts, allocating work as necessary
• Appropriately assess risk when business decisions are made, demonstrating particular consideration for the firm’s reputation and safeguarding Citigroup, its clients and assets, by driving compliance with applicable laws, rules and regulations, adhering to Policy, applying sound ethical judgement regarding personal behaviour, conduct and business practices, and escalating, managing and reporting control issues with transparency.

Qualifications:

• Proven of relevant experience in Apps Development or systems analysis role
• Extensive experience system analysis and in programming of software applications
• Experience in managing and implementing successful projects
• Subject Matter Expert (SME) in at least one area of Applications Development
• Ability to adjust priorities quickly as circumstances dictate

Key Skills and Experience required

• Extensive development experience, specifically with building User Interface’s
• Technical skills in WPF, C#, DotNet, Kafka, SQL, Git
• Experience in performing QA
• Proven ability to work in high pressure environment
• Flexibility to work with a global team, across geographies and time zones
• Strong problem-solving skills and ability to think strategically
• Familiarity with agile methodologies.
• Excellent interpersonal and communication skills with the ability to manage stakeholder expectations

Any Beneficial / Nice to have skills and experience:

• React, Java and full stack development
• Knowledge of Prime Services is a plus
• Degree educated in Computer Science, Information Technology, or related field or experience operating in a similar role.

This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required.

What we’ll provide you
By joining Citi, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as:

• 27 days annual leave (plus bank holidays)
• A discretional annual performance related bonus
• Private Medical Care & Life Insurance
• Employee Assistance Program
• Pension Plan
• Paid Parental Leave
• Special discounts for employees, family, and friends
• Access to an array of learning and development resources

Visit our About Us | Culture, Values & Benefits page to learn more.
Alongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self, every day. We want the best talent around the world to be energized to join us, motivated to stay and empowered to thrive.

Job Family Group:
Technology ------------------------------------------------------
Job Family:
Applications Development ------------------------------------------------------
Time Type:
Full time ------------------------------------------------------
Most Relevant Skills
Please see the requirements listed above.------------------------------------------------------
Other Relevant Skills
For complementary skills, please see above and/or contact the recruiter.------------------------------------------------------
Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.

If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi .

View Citi’s EEO Policy Statement and the Know Your Rights poster.

Specific responsibilities of the role include: Designing and building web applications Writing code to create web pages and web applications, primarily in the ASP.NET environment and leveraging data from SQL databases Using front-end technologies such as HTML, CSS, and JavaScript and backend languages such as C# Analyzing user requirements and turning design mockups into functional web pages. Taking a wholistic approach to full-stack development, prioritising security, performance and reliability in a DevSecOps approach. Front-End Development (User Interface) Creating the visual layout and user interaction, and ensuring applications are responsive (work well on phones, tablets, and desktops). Optimizing images, code, and performance for faster loading. Delivering smooth user experience using frameworks like Angular. Back-End Development (Server Side) Developing APIs, reusable libraries and application logic. Handling security and authentication robustly. Optimizing storage procedures and database storage to ensure optimal performance, in particular with large datasets. Testing and Debugging Monitoring exception logs and user reports to identify and fix errors in software. Testing websites across different browsers and devices. Improving loading speed and responsiveness during high load scenarios. Improving SEO (search engine optimization). Collaboration with Other Team Members Working with senior software developers and product owners. Using integrated development tools and version control systems such as Azure DevOps, Microsoft Visual Studio and SQL Server Management Studio.

Discover your future at Citi
Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact.

Job Overview

Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance - we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech.

Equities Technology
Equities Technology at Citi is undertaking a bold, multi-year transformation to build a best-in-class global platform across execution, prime, clearing and cross-product margining. We are re-engineering our technology estate to achieve world-leading performance and resiliency, enabling new capabilities in advanced execution, global market connectivity, and modernised post-trade, clearing and margin processes. Our ambition is to deliver a seamlessly integrated, highly automated platform that drives outstanding client outcomes and accelerates growth across our global franchise. As part of the team, you’ll collaborate closely with high-calibre engineers and deeply engaged business and product partners - working together to define and deliver the next generation of Equities technology at Citi.

The Team
The Equity Finance Technology team are seeking a highly motivated software engineer for the Trading application, located in London. The role requires working with technologists across geographical locations and executing on the technical delivery. This role requires strong expertise in Java and the ability to work with traders in building business solutions through agile delivery.

Responsibilities:

• Resolve variety of high impact problems/projects through in-depth evaluation of complex business processes, system processes, and industry standards
• Provide expertise in area and advanced knowledge of applications programming and ensure application design adheres to the overall architecture blueprint
• Utilise advanced knowledge of system flow and develop standards for coding, testing, debugging, and implementation
• Develop comprehensive knowledge of how areas of business, such as architecture and infrastructure, integrate to accomplish business goals
• Provide in-depth analysis with interpretive thinking to define issues and develop innovative solutions
• Serve as adviser or coach to mid-level developers and analysts, allocating work as necessary
• Appropriately assess risk when business decisions are made, demonstrating particular consideration for the firm’s reputation and safeguarding Citigroup, its clients and assets, by driving compliance with applicable laws, rules and regulations, adhering to Policy, applying sound ethical judgement regarding personal behaviour, conduct and business practices, and escalating, managing and reporting control issues with transparency.

Qualifications:

• 6-10 years of relevant experience in Apps Development or systems analysis role
• Extensive experience system analysis and in programming of software applications
• Experience in managing and implementing successful projects
• Subject Matter Expert (SME) in at least one area of Applications Development
• Ability to adjust priorities quickly as circumstances dictate

Key Skills and Experience required

• Extensive development experience
• Technical skills in Java, Kafka, SQL, Git
• Experience in performing QA, TDD and BDD practices
• Proven ability to work in high pressure environment
• Flexibility to work with a global team, across geographies and time zones
• Strong problem-solving skills and ability to think strategically
• Familiarity with agile methodologies.
• Excellent interpersonal and communication skills with the ability to manage stakeholder expectations

Any Beneficial / Nice to have skills and experience:

• React and full stack development
• Knowledge of Prime Services is a plus
• Bachelor’s or Master’s degree in Computer Science, Information Technology, or related field.

This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required.

What we’ll provide you
By joining Citi, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as:

• 27 days annual leave (plus bank holidays)
• A discretional annual performance related bonus
• Private Medical Care & Life Insurance
• Employee Assistance Program
• Pension Plan
• Paid Parental Leave
• Special discounts for employees, family, and friends
• Access to an array of learning and development resources

Visit our About Us | Culture, Values & Benefits page to learn more.
Alongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self, every day. We want the best talent around the world to be energized to join us, motivated to stay and empowered to thrive.

Job Family Group:
Technology ------------------------------------------------------
Job Family:
Applications Development ------------------------------------------------------
Time Type:
Full time ------------------------------------------------------
Most Relevant Skills
Please see the requirements listed above.------------------------------------------------------
Other Relevant Skills
For complementary skills, please see above and/or contact the recruiter.------------------------------------------------------
Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.

If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi .

View Citi’s EEO Policy Statement and the Know Your Rights poster.