C# .NET Developer / Senior (Trading) Job at Nicoll Curtin (Hong Kong)

Foreign Exchange Velocity Senior C# Developer

Citi’s FX technology group supports the front office technology operations of on...

Location

United States , New York

Salary:

142320.00 - 213480.00 USD / Year

Citi

Expiration Date

June 29, 2026

Requirements

5-7 years of relevant experience in C# and .NET
Expertise in prompting of LLMs and getting the most from AI models
Excellent understanding of C#, .NET and Windows internals
Experience in production application support and development
Stakeholder and people management experience
Demonstrated leadership skills
Knowledge of industry practices and standards
Clear and concise written and verbal communication
core C# language and .NET runtime
knowledge of WPF and TypeScript is a plus

Job Responsibility

Utilize in-depth knowledge and skills across multiple Applications Development areas to provide technical oversight across systems and applications
Review and analyze proposed technical solutions for projects
Coordinate with QA team
Liaison with the global business, support and development teams
Troubleshoot performance and scalability issues
Third line support of the platform during trading hours
Interact closely with the business product manager and other internal business users covering FX trading
Develop comprehensive knowledge of how areas of business integrate to accomplish business goals
Provide evaluative judgment based on analysis of factual data in complicated and unique situations
Ensure essential procedures are followed and contribute to defining standards negotiating with external parties when necessary

What we offer

medical, dental & vision coverage
401(k)
life, accident, and disability insurance
wellness programs
paid time off packages, including planned time off (vacation), unplanned time off (sick leave), and paid holidays
discretionary and formulaic incentive and retention awards

Fulltime

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Senior .Net Developer

The Indiana Department of Health (IDOH) is seeking a Senior .NET developer to wo...

Location

United States , Indianapolis

Salary:

Not provided

Ocean Blue Solutions

Expiration Date

Until further notice

Requirements

Analyze existing applications at IDOH and building new web applications
Work with project manager, other developers, business analysts, and functional team members
Complete project assignments and participate in full development life cycle including requirements analysis and design
Work with technical and functional staff on detailed business requirements, understanding business processes and technology, agency standards, federal and state policies
Write technical specifications based on conceptual design and stated business requirements
Use object-oriented techniques and best practices for design, development, unit testing, and deployment
Development of code along with unit testing strategy & plans
Use Microsoft .NET Framework and a supported MVC framework, C# programming language to development of the applications
Work with Project Manager to ensure project plan is maintained and project milestones are being met
Work with PM, technical staff, and end user to prototype, refine, test, and debug programs to meet needs of the application

Job Responsibility

Performing requirements analysis, documenting, and communicating the results to EDI team and program team
Ensure accurate and appropriate file exchanges with external trading partners and resolve EDI data transmission conflicts
Provide helpdesk level support for EDI claim transactions

Senior C# Developer – Pricing Engines

Join a fast-paced trading tech environment where your C# code powers real-time p...

Location

Netherlands , Amsterdam

Salary:

Not provided

Levy Professionals

Expiration Date

Until further notice

Requirements

Extensive experience with C#/.NET in complex back-end or trading systems
Proven low-latency, high-throughput engineering expertise (ideally in pricing or market data)
Deep knowledge of concurrency, async IO, performance tuning, profiling, TCP/binary protocols
Strong understanding of financial markets: FX spot/forwards/swaps, bonds, IR swaps, curves, PV/DV01
Experience working with front-office stakeholders
Clear communication and the ability to simplify complex concepts

Job Responsibility

Build high-performance C# services on .NET Core for real-time pricing and risk
Refactor and migrate existing C# and Java components into a unified .NET Core platform
Optimise multithreading, memory, GC and network performance on bare-metal servers
Implement curve handling and curve location for FX, bonds and rates
Integrate with trading tools, market data feeds and external pricing/execution platforms
Ensure safe, efficient price distribution via internal messaging
Contribute to automated testing, CI/CD and observability in a 24/7 trading setup
Work in an agile DevOps team with shared support responsibilities

Senior C# Software Engineer

As a Senior C# Software Engineer, you will take ownership of major components an...

Location

South Africa , Gauteng - Northern Suburbs

Salary:

Not provided

Skye Business Solutions

Expiration Date

Until further notice

Requirements

6–9 years of software development experience, with demonstrated ownership of complex systems
Strong professional experience in C#/.NET (backend and/or services), including design and refactoring for maintainability
Proven experience leading technical work: design input, complex debugging across components, and delivery ownership
Solid SQL experience (performance considerations, query refactoring, data integrity)
Practical experience working in an agile delivery environment and using Azure DevOps (or equivalent), with the ability to mentor others in good usage
Bachelor’s degree in a relevant field (e.g., Computer Science, Software Engineering, Information Systems)

Job Responsibility

Design, build, and maintain C#/.NET services and components that meet quality and performance expectations
Take end‑to‑end ownership of complex work: analysis, design, implementation, testing, deployment readiness, and operational support
Drive refactoring and technical debt reduction with a focus on maintainability and business value
Lead or contribute to design reviews and architecture discussions across teams
Apply strong design principles (e.g., SOLID) and guide others in their practical application
Make strategic technical decisions that improve system health and reduce long‑term complexity
Set and uphold coding standards and engineering practices within the team
Help define and reinforce a strong testing culture (unit, integration, component, regression as appropriate)
Raise the quality bar through reviews, coaching, and pragmatic improvements to the Definition of Done
Use Azure DevOps effectively for delivery transparency and discipline (work items, code reviews, pipelines, traceability)

Fulltime

Senior C# Engineer

We’re partnered with an innovative proprietary trading firm in the City of Londo...

Location

United Kingdom , London

Salary:

80000.00 - 120000.00 GBP / Year

Harrington Starr

Expiration Date

Until further notice

Requirements

Strong background in C# and the .NET platform (working with the latest versions)
Database knowledge (SQL Server, Oracle, or equivalent)
Degree in Computer Science or related subject
Fluent in English with excellent communication skills
Detail-oriented, with a drive to deliver high-quality solutions

Job Responsibility

Develop and maintain high-performance trading applications in a C#/.NET/SQL Server environment
Take ownership of new, greenfield projects, influencing design and implementation from the start
Collaborate with a talented team of engineers and researchers in a supportive environment
Continuously innovate and improve tools, processes, and systems
Deliver solutions that directly contribute to trading success and business growth

What we offer

Competitive salary with a strong benefits package
Work on greenfield projects where your ideas genuinely shape the outcome
Exposure to the latest .NET technologies in a high-performance trading environment
Clear opportunities for career growth and progression
Collaborative, non-corporate culture where innovation and creativity are encouraged
Great work-life balance supported by wellness perks, healthcare, and team socials

Fulltime

Senior Developer, Integrations

This role within the Corporate Technology, Innovation & Data department focuses ...

Location

Canada , Toronto

Salary:

90000.00 - 125000.00 CAD / Year

Four Seasons

Expiration Date

Until further notice

Requirements

5+ years of experience in software development
Post-secondary degree or diploma in Computer Science or a related technical discipline, or equivalent experience
Experience working within complex, enterprise-scale technology environments
Azure certifications preferred
Deep expertise in cloud development and integration architecture, with a strong focus on Microsoft Azure
Hands-on experience with Azure services including Service Bus, Event Grid, App Services, Azure Functions, Logic Apps, and Application Insights
Strong development experience using .NET, C#, Visual Studio, and Visual Studio Code
Experience building RESTful APIs, microservices, and integrations using XML, JSON, and related technologies
Experience with relational databases and NoSQL technologies such as Cosmos DB
Familiarity with authentication and authorization concepts including OAuth and OIDC

Job Responsibility

Design and develop enterprise integration solutions that connect systems, applications, and data sources to drive business value
Write clean, maintainable code and perform unit testing while producing appropriate technical artefacts and documentation
Ensure high standards of development processes and code quality through adherence to best practices
Build scalable, reusable, reliable, and secure integration solutions that support long-term architectural sustainability
Act as an Azure subject matter expert, supporting solution architecture decisions and mentoring team members
Support DevOps and production support teams with troubleshooting, investigations, and high-priority issue resolution
Partner with senior functional leaders and internal stakeholders to understand business needs and requirements
Provide strategic and architectural guidance on integration design patterns and solution options
Communicate technical designs, trade-offs, and impacts effectively to business stakeholders
Collaborate with project managers and internal teams to scope initiatives, define deliverables, estimate effort, and support timelines

Fulltime

Senior ETRM Developer

You'll be joining one of the most technically forward-thinking ETRM teams in the...

Location

United Kingdom , London

Salary:

Not provided

Harrington Starr

Expiration Date

Until further notice

Requirements

Expert-level Endur experience – JVS or OpenComponents (Java)
Hands-on Java engineering skills - .Net or C# are transferable
Strong SQL / Oracle skills
Familiar with key tech: REST APIs, Kafka, DMS, Crystal Reports, Tomcat
A good grasp of the ETRM lifecycle: Trading, Risk, Ops
Independent mindset – someone who can own delivery and get it done

Job Responsibility

Owning Endur development workstreams from design to production release
Driving platform enhancements and new builds across STP, PnL, and risk
Managing technical support and resolving live incidents (hands-on)
Leading discussions with the business and on/offshore teams
Building and supporting custom web interfaces, APIs, and backend integrations

Fulltime

Senior Software Engineer C#

Senior C# .NET Engineer | OMS Team | Elite Hedge Fund | £250k; A leading hedge f...

Location

United Kingdom , London

Salary:

250000.00 GBP / Year

Orbis Consultants

Expiration Date

Until further notice

Requirements

Deep expertise in C# .NET, including multithreading and low-latency systems
Proven experience working with Order Management Systems is a bonus
Ideally a mix of OMS vendor and in-house bespoke system experience
Solid understanding of trading workflows across asset classes
Strong communication and stakeholder engagement skills are crucial

Job Responsibility

Designing and developing high performance, scalable solutions within a mission critical OMS
Collaborating closely with traders, PMs and quant teams to deliver bespoke functionality
Driving forward system enhancements and helping modernise legacy components
Owning features end-to-end in a fast-paced, delivery-focused environment

Fulltime

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C# .NET Developer / Senior (Trading)

Job Description

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