C# / Java Developer (trading systems) Jobs

Electronic Trading Core Developer

Electronic Trading Core Developer role at Citi London, working on the Ambrosia f...

Location

United Kingdom , London

Salary:

Not provided

Citi

Expiration Date

Until further notice

Requirements

Demonstrated Subject Matter Expert (SME) in area of Applications Development, preferably in electronic and algorithmic trading systems
Passion for coding excellent, commercial grade, mission critical Java frameworks based on event sourcing microservices
Complete knowledge of modern Java, the JVM, the Linux Operating system, system calls and Kernel
Knowledge of TCP and other IP based network protocol technologies including hardware accelerated kernel bypass e.g. Solarflare OpenOnload
Performance assessment and targeted tuning
Design and architectural elegance
Experience in implementing projects
Great communicator with high EQ
Ability to occasionally produce clear diagrammatic documentation and model key aspects in UML sequence diagrams
May have a background in C++ before moving to Java

Job Responsibility

Work on the integration of functions to meet goals, deploy new products, and enhance processes across the Capital Markets asset classes
Provide world class expertise in area of Java low latency development
Utilize advanced knowledge of supported main system flows and comprehensive knowledge of multiple areas to achieve technology goals
Consult with end users to identify system function specifications and incorporate into overall system design

What we offer

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

Fulltime

New

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

New

Core Java Software Developer

The candidate will write server-side code for trade life cycle management servic...

Location

Salary:

Not provided

TIGER

Expiration Date

Until further notice

Requirements

A solid foundation in computer science, with strong competencies in data structures, algorithms and software design
Extensive programming experience in Java (strong OO skills preferred, C++ may be considered)
Experienced in large systems software design and development process, with good knowledge of Unix/Linux
Coding skills in Python or any other scripting language and SQL, and/or knowledge of TCP/IP and network programming are a plus
Experience with unit testing tools such as JUnit
Working knowledge of open source software such as Spring, Rules Engines, Hibernate, and FIX4J will be a big plus

Job Responsibility

Write server-side code for trade life cycle management services to be used by several trading applications
Write server-side code for Equities trading applications
Build our trading services platform, external vendor connectivity infrastructure using your strong background in distributed systems, messaging, network system design and large scale systems
Build internal systems used by several sales and trading front-end applications globally with your domain expertise in trading systems, exchange/vendor connectivity
Participate in design and code reviews
Create robust high-volume production applications and can also develop prototypes quickly

What we offer

Fixed salary (Competitive Base)
Annual bonuses

SVP - Senior Low Latency Developer

Citi Equities Technology organization is looking for a senior lead engineer in t...

Location

Singapore , Singapore

Salary:

Not provided

Citi

Expiration Date

Until further notice

Requirements

Minimum 10 years’ experience with Strong technical knowledge with expertise in either Java, C#, C++
Java 11+, Asynchronous programming, microservices architecture and patterns, low latency systems design and implementation
Previous experience in developing automated trading platforms
Knowledge of Python would be beneficial
Strong understanding of automated testing techniques
Solid understanding of Agile methodologies and Continuous Integration processes
Ability to prioritize multiple tasks, set goals and meet deadlines
Strong communication skills with a demonstrable ability to present & grasp complex concepts in a multicultural environment is required
Team leadership experience

Job Responsibility

Design, develop and support of the high-performance electronic execution platform
Build common solutions for trading platform monitoring, trade reconciliation, application recovery etc.
Lead a productive development team to meet aggressive timeline
Partner with traders, quant researchers and clients on product development
Continuous maintenance & improvements of the testing frameworks, development tools and environments
Ability to envision, design and implement test cases for trading functions
Contribute towards Agile and Continuous Integration processes

Fulltime

Software Developer

Evanhoe and Associates is seeking a Software Developer to support the Advanced T...

Location

United States , Dayton

Salary:

Not provided

Evanhoe & Associates

Expiration Date

Until further notice

Requirements

Possess 4-6 years' experience in programs and contracts of similar scope, type, and complexity
Possess an active TS/SCI clearance
Possess a Bachelor’s degree in Computer Science or another related discipline from an accredited college or university
In lieu of a degree, four (4) years of additional software engineering experience on projects with similar software processes may be substituted for a Bachelor’s degree, for a total of eight (8) years of experience
Experience with Java, C/C++, Python
Experience with JavaScript (React) web development
Experience with RESTful Web Services
Experience with Linux (Red Hat 7/8) systems
Experience with MySQL (MariaDB), PostgreSQL
Experience with Git version control

Job Responsibility

Develop, maintain, and enhance complex and diverse software systems (e.g., data transfer architectures, manipulation of extremely large data sets, message processing) based on documented requirements
Work individually or as part of a team
Review and tests software components for adherence to the design requirements and documents test results
Resolve software problem reports
Utilize software development and software design methodologies appropriate to the development environment
Provide specific input to the software components of system design to include hardware/software trade-offs, software reuse, use of Commercial-Off-the-shelf (COTS)/Government Off-the-shelf (GOTS) in place of new development, and requirements analysis, and synthesis from system level to individual software components

What we offer

401(k) with immediate vesting
Paid Federal Holidays
Tuition Reimbursement
Medical Insurance, including Vision and Dental Insurance
Employer-Paid Short-Term and Long-Term Disability
Employer Paid Life Insurance
Supplemental Life Insurance
FSA/HSA Programs
Commuter Benefits Program
Adoption Assistance Program

Fulltime

New

Software Engineer

My client is seeking a talented Software Engineer who will play a critical role ...

Location

United Kingdom , London

Salary:

150000.00 - 500000.00 GBP / Year

Hunter Bond

Expiration Date

Until further notice

Requirements

Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field
1+ years of professional development experience as a Software Engineer in either C++, Python, Java or Rust
Strong understanding of data structures, algorithms, and software design principles
Experience with multi-threaded programming and real-time systems (C++/Java)
Experience writing software for massive scale (Up to 100s billions of records at a time!)
Proficiency in Linux/Unix environments
Strong communication skills - this is a position where you will liaise with Senior Stakeholders such as PMs, Quants and Traders

Job Responsibility

Design, develop, and maintain high-performance trading applications
Performance tuning of state-of-the-art trading systems - optimise code for maximum speed and efficiency, minimising latency
Implement and enhance trading algorithms in collaboration with quantitative researchers and traders
Handle large volumes of market data in real-time, ensuring accurate and fast data ingestion, processing, and storage to feed trading algorithms

What we offer

Bonus

Fulltime

Staff Software Engineer - Virtual Machine

As a Staff Software Engineer, you will be a technical leader who designs, implem...

Location

Czech Republic , Prague

Salary:

Not provided

Azul Systems

Expiration Date

Until further notice

Requirements

10+ years of systems‑level software development with deep expertise in C and C++ (performance, memory safety, concurrency)
Strong knowledge of virtual machine internals: runtime services, class/method metadata, bytecode/IR pipelines, safepoints, deoptimization, inline caches
Familiarity with compilers (JIT and/or AOT): IR design, code generation, register allocation, inlining, tiering, and optimization passes
Solid understanding of operating systems (Linux preferred): processes/threads, scheduling, memory management (NUMA, huge pages), filesystems, networking
Working knowledge of computer architecture and hardware performance: caches, TLB, branch prediction, SIMD, PMU/perf tooling
Proven ability to design clean, scalable architectures and write high‑quality design docs
expertise in API/ABI boundaries and componentization
Comfort with performance analysis tools: perf, eBPF, VTune, flame graphs, micro‑benchmarks
methodical approach to measurement and regression control
Excellent problem‑solving and debugging skills for complex, concurrent systems

Job Responsibility

Lead the design and architecture of core VM components (runtime services, JIT/AOT compiler pipelines, GC, thread scheduling, synchronization primitives)
Own end‑to‑end delivery of complex features from ideation and design reviews to implementation and benchmarking
Profile and optimize latency‑critical paths across runtime, compiler, OS, and hardware boundaries (NUMA, caches, micro‑architecture, syscall/IO paths)
Establish technical standards and code quality practices
drive design documents, RFCs, and engineering reviews
Collaborate with performance engineering to define and hit SLOs for tail latency, throughput, footprint, and startup/warm‑up
Advance observability in the VM (metrics, tracing, perf counters) to diagnose GC pauses, compilation stalls, safepoints, and contention
Mentor and coach engineers
cultivate a culture of rigorous design, empirical validation, and respectful collaboration
Contribute to roadmap planning, risk management, and release criteria

What we offer

Equity Program - be part of the company success
Annual bonus based on company performance
Referral Program - bring your colleague we would all love to work with
IT Equipment - MacBook Pro or any other HW according to your preferences
Work-life balance - 5 weeks of holidays, 5 sick days, flexible working hours, 100% work from home also possible
Offices in Prague City Centre - if you prefer
Most importantly you will work with top experts worldwide who contribute to the Java ecosystem

Fulltime

Application Programmer

An opportunity to work for an Australian leading warrants trading business and b...

Location

Australia , Sydney

Salary:

Not provided

Citi

Expiration Date

Until further notice

Requirements

8+ years of relevant experience
Experience in systems analysis and programming of software applications
Experience in managing and implementing successful projects
Ability to work under pressure and manage deadlines
Ability to adjust priorities quickly as circumstances dictate
Ability to work with minimal supervision on multiple concurrent projects
Consistently demonstrates clear and concise written and verbal communication
Bachelor’s degree/University degree
Experience of implementing complex projects involving multiple stakeholders
In-depth knowledge of FIX protocol and proven experience in front-office systems

Job Responsibility

Development of the Warrants market making application stack, design solutions, coordinate delivery, investigate production incidents, participate in L2/L3 support activities
Develop technical solutions to meet business requirements taking into account recommended technologies, non-functional requirements, internal policies and procedures
Participate in all elements of SDLC from gathering business requirements, analysis, code reviews, testing, deploying applications
Understand and help shaping Citi’s global Warrants platform
Establish and maintain strong working relationships with peers and other local and global technology team members
Establish and maintain strong working relationships with the local business
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 judgment regarding personal behaviour, conduct and business practices, and escalating, managing and reporting control issues with transparency
Comply with the ethical standards contained in the Code of Conduct

What we offer

Global Benefits
We bring the best to our people. We put our employees first and provide the best-in-class benefits they need to be well, live well and save well

Fulltime

C# / Java Developer (trading systems)

Randstad

Location:
Japan, Tokyo

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Requirements:

Nice to have:

Additional Information:

Job Posted:
December 09, 2025

Expiration:
February 05, 2026

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Job Posted:December 09, 2025

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December 09, 2025

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