A leading investment bank is expanding its FX Options technology team and is seeking an experienced Senior UI Developer to drive the build-out of complex, Real Time trading applications. This is a long-term contract opportunity with significant runway and the chance to work on genuinely business-critical Front Office systems.

Role Details

Position: Senior UI Developer (React/TypeScript)

Type: Contract

Rate: Above market rate - to be discussed on initial call
Duration: 6-month rolling (minimum 2 years of work already signed off)

Location: London (Hybrid)

Key Requirements

7+ years of Front End development experience

Deep expertise in React, Redux, RxJS, NPM/Yarn, Webpack, CSS, HTML

Strong experience with CI/CD pipelines (Azure DevOps ideal)

Proven ability to build complex, event-driven, Real Time SPAs

Strong understanding of software design principles and design patterns

Ability to optimise latency-sensitive UIs

FX Options or wider financial markets experience is essential

Excellent communication skills in English

Responsibilities

Deliver across the full SDLC, from requirements to post-release support

Own and contribute to technical design and architecture

Break down large initiatives and coordinate delivery across teams

Build new features within established coding patterns and frameworks

Mentor other developers and support the hiring process

Why This Role?

This is a rare opportunity to join a high-performing Front Office engineering team working on cutting-edge FX Options systems. You'll have autonomy, technical ownership, and long-term project stability - all while working at the heart of a major global bank.

4x Senior Frontend Developers positions with a major financial services company in Krakow. The team focuses on developing front office sales and trading applications for an exciting microservice platform, utilising cutting-edge technologies to support Rates and Credit business areas.
 
Contract: B2B, 6 month rolling - 4 year project
Location: Krakow
Pay rate: up to 1700 PLN per day
 
Your Role:
Part of a scrum team working on delivering business value through software
Implement and deliver high-quality software solutions
Demonstrate skills in working with trading desks and other teams in the bank
Understand business requirements and translate them into code
Design, build and maintain efficient reusable code
Build and maintain unit/integration/functional/non-functional testing framework
Provide technical direction and system architecture
 
Essential Requirements:
Strong Proficiency (5+ years) in the following technologies: React, TypeScript, JavaScript ES2020, HTML5, CSS3
Experience with NodeJS, NPM, PNPM
Excellent problem-solving and analytical thinking
Self-starting attitude and the desire to take ownership of requirements from start to finish
Proactive, comfortable working in dynamic environments with fast-paced deliveries and changing requirements
Excellent communication skills
 
Nice-to-have Requirements:
Experience in using Redux, Redux-Saga, AG-Grid, LESS/SASS, NodeJS and Lodash
Understanding of FP, OOP, REST APIs, real-time data-streaming and messaging systems, agile development processes, and automation technologies for testing and CI.
Investment banking/financial services domain knowledge is a big plus
 
 
 

Senior Front-End Engineer 
Location: Wroclaw, Krakow or London
Type: Contract - with high potential for permanent conversion to Associate Director or Director level depending on experience
Duration: 6 months +
Rate: Up to 2150 PLN per day (Poland) / up to £950/day (London)

We are looking for an experienced Front-End Engineer to join a high-performing team building cutting-edge financial desktop applications. This role focuses on delivering robust, real-time solutions using modern JavaScript and interoperability standards.

Key Responsibilities

Develop front-end components for high-performance desktop applications.
Implement asynchronous JavaScript patterns for real-time, event-driven systems.
Work with OpenFin APIs for window management and inter-application messaging.
Ensure interoperability between applications using FDC3 standards.
Optimize performance and troubleshoot complex issues in production environments.

Required Skills

Advanced proficiency in JavaScript, with strong knowledge of asynchronous programming (Promises, async/await, event-driven architecture).
Hands-on experience with OpenFin APIs.
Understanding of FDC3 protocols for secure, standardized communication.
Strong debugging and performance optimization skills.
Familiarity with REST APIs and JSON.

Ideal Candidate

Experienced in building complex, real-time front-end systems.
Comfortable working in agile, collaborative environments.
Interested in financial technology and interoperability standards.
Nice to have: React.JS and .Net or Java

Senior Java Engineer – Strategic Trading Platform

Location: Poland / Remote

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About the Platform

Greenfield project, building a next-generation trading platform currently in beta, designed to serve a large and demanding population of market traders. It’s strategic to our business and built for high performance, resilience, and configurability. Intraday Risk platform, built with Event Driven architecture, Kafka.

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Tech Stack:

• Backend: Java, Kafka, Hazelcast

• Frontend: React-based web UI

• Data: ClickHouse, Postgres

• Analytics: Internal quant library

 

Profile requirements:

• Candidate must have Risk Intraday experience

• Proven track record of developing Event-Driven platforms, with Kafka

• 'Engineer' not 'developer' mindset- A curious problem solver

About the Role

We are building a next-generation AI layer on top of a financial data platform—something no other organization has achieved at this scale. This is your chance to join a small, impactful team and work on greenfield projects that will redefine how professionals interact with massive datasets.

You’ll help us:

• Move from traditional keyword search to semantic search and NLP layers.
• Implement knowledge graphs and vector embeddings to handle hundreds of millions of time-series datasets.
• Build AI-driven reporting capabilities and lay the foundation for our long-term vision: an “Economist in a Box” capable of answering complex queries using advanced AI pipelines.

What You’ll Do

• Develop and maintain .NET-based applications for AI-driven financial solutions.
• Collaborate with AI specialists to integrate semantic search, knowledge graphs, and vector database technologies.
• Work on SaaS and desktop products delivering charts, graphs, and reports from massive datasets.
• Optimize performance for large-scale data processing and ensure secure, scalable integration of AI insights.
• Contribute to building models that generate machine-readable XML files for charts and reports.

AI Engineer (VP) – Top Investment Bank Location: Glasgow Hybrid: 3 days per week onsite

About the Role

Join a forward-thinking team that’s transforming how AI and cloud-native platforms support front-office trading. We’re hiring a hands-on engineering leader (VP level) to shape the future of our Dart platform, a core infrastructure enabling Quantitative and Strat developers to build next-generation trading solutions.

This is a high-impact role where you’ll work directly with front-office traders and quants to create bespoke Generative AI tools that influence trading performance. If you’re driven by innovation and excited to build something truly original, this is your opportunity to lead from the front.

What You’ll Do

Lead and innovate across hybrid environments, scaling platform capabilities and accelerating AI adoption:

• Architect and develop advanced platform services for AI-powered trading workflows

• Potentially lead a small team of engineers, fostering technical excellence while remaining hands-on

• Collaborate with infrastructure and platform teams to align capabilities and reduce duplication

• Design secure, scalable, and cost-efficient systems using AWS and Kubernetes

• Mentor junior engineers and establish best practices for AI/ML infrastructure

• Influence cross-functional teams and champion modern engineering approaches

• Stay ahead of the curve in Generative AI, ML infrastructure, and cloud-native tooling

Tech Stack

• Programming: Python (Java familiarity is a plus)

• Cloud: AWS (S3, Kinesis, Glue, Lambda, Step Functions, SageMaker, and more)

• On-Prem: Managed Kubernetes Platform, Hadoop ecosystem

Why This Role Stands Out

• Direct Impact: Build AI tools used daily by traders and quants to optimize strategies

• Creative Freedom: Collaborate openly and bring your ideas to life

• Visibility: Play a key role in a small, high-impact team with broad organizational exposure

What We’re Looking For

• 10+ years of experience in software or data engineering, ideally in platform or infrastructure roles

• Strong Python programming skills with a focus on code quality and testing

• Proven experience applying Generative AI in front-office or capital markets environments

• Deep expertise in AWS services including S3, Glue, Kinesis, Lambda, ECS, IAM, KMS, API Gateway, Step Functions, MSK, and CloudFormation

• Passion for hands-on engineering and leading small, agile teams

Nice to Have

• Experience with on-prem Hadoop and Kubernetes

• Familiarity with AWS cost optimization tools

• Understanding of front-office developer workflows in financial services

AI Engineer (AVP) – Top Investment Bank Location: Glasgow Hybrid: 3 days per week onsite

About the Role

Join a pioneering team that’s redefining how AI and cloud-native platforms power front-office trading. We’re hiring a hands-on AI Engineer (AVP level) to help shape the future of our Dart platform—a critical infrastructure supporting Quantitative and Strat developers in building next-generation trading solutions.

This is not just another engineering role. You’ll work side-by-side with front-office traders and quants, creating bespoke Generative AI tools that directly impact trading performance. If you’re passionate about building something unique, ahead of the curve, and never done before, this is your opportunity to make it happen.

What You’ll Do

You’ll design, build, and innovate across both cloud and on-prem environments, scaling platform capabilities and driving AI adoption:

• Architect and develop cutting-edge platform services for AI-driven trading

• Collaborate with internal infrastructure and platform teams to align capabilities and avoid duplication

• Design and implement secure, cost-aware, and scalable systems using AWS services and Kubernetes

• Contribute to best practices for AI/ML infrastructure and mentor junior engineers as needed

• Work across organizational boundaries and champion modern engineering trends

• Stay ahead of the curve in Generative AI, ML infrastructure, and cloud-native tooling

Tech Stack

• Programming: Python (Java familiarity is a plus)

• Cloud: AWS (S3, Kinesis, Glue, Lambda, Step Functions, SageMaker, and more)

• On-Prem: Managed Kubernetes Platform, Hadoop ecosystem

Why This Role is Different

• Direct Impact: Build AI tools that traders and quants use daily to optimize strategies

• Creative Freedom: Collaborate openly and bring your ideas to life

• Visibility: Be a key contributor in a small, high-impact team with broad organizational exposure

What We’re Looking For

• 5–10 years of experience in software or data engineering, ideally in platform or infrastructure roles

• Strong programming skills in Python, with a passion for code quality and testing

• Demonstrable experience applying Generative AI concepts (ideally in a front-office or capital markets environment)

• Hands-on experience with AWS services such as S3, Glue, Kinesis, Lambda, ECS, IAM, KMS, API Gateway, Step Functions, MSK, and CloudFormation

• Experience working in fast-paced front-office environments, either in engineering or analytical roles

• A collaborative mindset and enthusiasm for hands-on engineering

Nice to Have

• Experience with on-prem Hadoop and Kubernetes

• Familiarity with AWS cost management and optimization tools

•  

Location: London

Hybrid: 3 days per week in London office

 

About the Role

Join a pioneering team that’s redefining how AI and cloud-native platforms power front-office trading. We’re hiring a hands-on AI Engineer (AVP level) to help shape the future of our Dart platform, a critical infrastructure that supports Quantitative and Strat developers in building next-generation trading solutions.

 

This is not just another engineering role. You’ll work side-by-side with front-office traders and quants, creating bespoke Generative AI tools that directly impact trading performance. If you’re passionate about building something unique, ahead of the curve, and never done before, this is your chance to make it happen.

 

What You’ll Do

You’ll design, build, and innovate across both cloud and on-prem environments, scaling platform capabilities and driving AI adoption:

• Architect and develop cutting-edge platform services for AI-driven trading.

• Collaborate with internal infra/platform teams to align capabilities and avoid duplication.

• Design and implement secure, cost-aware, scalable systems using AWS services and Kubernetes.

• Contribute to best practices for AI/ML infrastructure and mentor junior engineers when needed.

• Work across organizational boundaries and champion modern engineering trends.

• Stay ahead of the curve in Generative AI, ML infrastructure, and cloud-native tooling.

 

Tech Stack

• Programming: Python (Java familiarity is a plus).

• AWS: S3, Kinesis, Glue, Lambda, Step Functions, SageMaker, and more.

• On-Prem: Managed Kubernetes Platform and Hadoop ecosystem.

 

Why This Role is Dfferent

• Direct Impact: Build AI tools that traders and quants use daily to optimize strategies.

• Creative Freedom: Open collaboration and the chance to bring your ideas to life.

• Visibility: Be a big player in a small, high-impact team with exposure across the organization. What We’re Looking For

• 5 – 10 years of experience in software/data engineering, ideally in platform or infra roles.

• Strong programming skills in Python; passion for code quality and testing.

• Demonstrable experience applying Generative AI concepts (ideally in a front-office/capital market environment)

• Experience with AWS services (S3, Glue, Kinesis, Lambda, ECS, IAM, KMS, API Gateway, Step Functions, MSK, CloudFormation).

• Experience working in a fast-paced front-office environment in either engineering or analytical roles.

• Passion for being hands-on and contributing to a collaborative engineering culture.

 

Nice to Have

• Experience with on-prem Hadoop and Kubernetes.

• Familiarity with AWS cost management and optimization tools.

• Knowledge of front-office developer workflows in financial services.

Location: London

Hybrid: 3 days per week in London office

 

About the Role

Join a pioneering team that’s redefining how AI and cloud-native platforms power front-office trading. We’re hiring a hands-on engineering leader to shape the future of our Dart platform, a critical infrastructure that supports Quantitative and Strat developers in building next-generation trading solutions.

 

This is not just another engineering role. You’ll work side-by-side with front-office traders and quants, creating bespoke GenAI tools that directly impact trading performance. If you’re passionate about building something unique, ahead of the curve, and never done before, this is your chance to make it happen.

 

What You’ll Do

You’ll lead and innovate across both cloud and on-prem environments, scaling platform capabilities and driving AI adoption:

• Architect and develop cutting-edge platform services for AI-driven trading.

• Potentially lead a small team of engineers, driving technical excellence while staying hands-on.

• Collaborate with internal infra/platform teams to align capabilities and avoid duplication.

• Design and implement secure, cost-aware, scalable systems using AWS services and Kubernetes.

• Mentor junior engineers and set best practices for AI/ML infrastructure.

• Influence across organisational boundaries and champion modern engineering trends.

• Stay ahead of the curve in Generative AI, ML infrastructure, and cloud-native tooling.

 

Tech Stack

• Programming: Python (Java familiarity is a plus).

• AWS: S3, Kinesis, Glue, Lambda, Step Functions, SageMaker, and more.

• On-Prem: Managed Kubernetes Platform and Hadoop ecosystem.

 

Why This Role is Different

• Direct Impact: Build AI tools that traders and quants use daily to optimize strategies.

• Creative Freedom: Open collaboration and the chance to bring your ideas to life.

• Visibility: Be a big player in a small, high-impact team with exposure across the organisation.

 

What We’re Looking For

• 10 + years of extensive experience in software/data engineering, ideally in platform or infra roles.

• Strong programming skills in Python; passion for code quality and testing.

• Demonstrable experience applying GenAI concepts to front-office/capital market environments.

• Deep experience with AWS services (S3, Glue, Kinesis, Lambda, ECS, IAM, KMS, API Gateway, Step Functions, MSK, CloudFormation).

• Passion for being hands-on while enabling and growing a small engineering team.

 

Nice to Have

• Experience with on-prem Hadoop and Kubernetes.

• Familiarity with AWS cost management and optimisation tools.

• Knowledge of front-office developer workflows in financial services.

Senior Back-End .NET Engineer – Repo Trading Platform | B2B | Warsaw (Hybrid)
Are you a passionate back-end engineer with deep .NET expertise and a love for building scalable trading platforms? Join a high-impact team working on a greenfield repo trading initiative at the intersection of rates and credit.
This is a backend-only role focused on microservices, cloud-native architecture, and direct collaboration with traders and credit teams. You'll be part of a strategic build-out using modern tech and agile practices.
 
Key Highlights:
•    Tech Stack: C#/.NET 8, AWS, Docker (Kubernetes roadmap), REST APIs, microservices
•    Domain: Repo trading, credit integration, fixed income workflows
•    Environment: Collaborative team, direct trader exposure, hands-on BAs
•    Location: Warsaw-based, hybrid (negotiable)
•    Contract: 12-month rolling, part of a 2-year strategic project
•    Interview Process: 2 stages + take-home assignment (AI tools allowed, but understanding required)
 
What You’ll Be Doing:
•    Building and scaling a repo trading platform with 50–60 microservices per project
•    Integrating new markets and asset types
•    Collaborating with traders and credit teams to shape workflows
•    Contributing to architectural decisions and CI/CD pipelines
 
What We’re Looking For:
•    Strong experience with C#/.NET (ideally v8)
•    Solid understanding of async programming, multithreading, and distributed systems
•    Experience with cloud (ideally AWS) and containerisation (Docker; Kubernetes a plus)
•    Exposure to financial platforms or trading systems preferred
 
This is a rare opportunity to work on a greenfield platform with direct business impact, modern tech, and a collaborative team culture. If you're ready to shape the future of repo trading, we’d love to hear from you.