C#.NET Software engineer - Trading applications Job at Talan (New York City)

Principal Full Stack Software Engineer

We're looking for a Principal Full Stack Software Engineer to join our team, foc...

Location

Poland , Gdańsk

Salary:

324000.00 - 433200.00 PLN / Year

Atlassian

Expiration Date

Until further notice

Requirements

10+ years in a software development team with strong fundamental software development skills
Experience with .NET Framework (C#)
Proficiency in web-based applications, architecture, and REST API integration
Experience in resolving customer issues through code error diagnosis, debugging, validation, and root cause analysis
Strong knowledge of HTML, CSS, JavaScript, jQuery, and browser/JavaScript fundamentals (React is a plus)
Familiarity with scripting languages and databases such as MSSQL and Postgres
Security-conscious approach to development
Experience in product experimentation and a track record of delivering value to customers

Job Responsibility

Understand the user journey and funnel to enhance Jira Align product strategy and direction by collaborating with product, design, and engineering teams
Guide the technical direction for implementing large-scale product features, evaluating trade-offs between correctness, robustness, performance, and customer impact to ensure optimal solutions
Debug team inefficiencies and ship well-tested, secure, reliable, and maintainable code, always prioritizing customer interests
Contribute to code reviews, documentation, and complex bug fixes with a focus on security, performance, and reliability
Mentor teammates to improve their skills and the overall growth of the engineering team, identifying blockers to ensure software engineering excellence in design principles, unit testing, performance engineering, and best practices for security and privacy

What we offer

This role may also be eligible for benefits, bonuses, commissions, and equity

Fulltime

Senior Application Developer

Embark on a transformative journey as a Senior Application Developer. At Barclay...

Location

United States , Whippany

Salary:

120000.00 - 175000.00 USD / Year

Barclays

Expiration Date

Until further notice

Requirements

Developing C# applications using .NET WinForms and WPF
Building GUI applications using MVP or MVVM design patterns
Applying data structures and algorithms in performance-sensitive systems
Profiling memory usage and improving application performance
Writing and maintaining unit tests

Job Responsibility

Development and delivery of high-quality software solutions by using industry aligned programming languages, frameworks, and tools. Ensuring that code is scalable, maintainable, and optimized for performance
Cross-functional collaboration with product managers, designers, and other engineers to define software requirements, devise solution strategies, and ensure seamless integration and alignment with business objectives
Collaboration with peers, participate in code reviews, and promote a culture of code quality and knowledge sharing
Stay informed of industry technology trends and innovations and actively contribute to the organization’s technology communities to foster a culture of technical excellence and growth
Adherence to secure coding practices to mitigate vulnerabilities, protect sensitive data, and ensure secure software solutions
Implementation of effective unit testing practices to ensure proper code design, readability, and reliability

What we offer

Medical, dental and vision coverage
401(k)
Life insurance
Other paid leave for qualifying circumstances
Competitive holiday allowance
Life assurance
Private medical care
Pension contribution

Fulltime

Senior Full Stack Developer

Embark on a transformative journey as a Senior Full Stack Developer. At Barclays...

Location

United States , Whippany

Salary:

170000.00 - 230000.00 USD / Year

Barclays

Expiration Date

Until further notice

Requirements

Developing C# applications using .NET WinForms and WPF for trading or complex desktop platforms
Designing and building GUI applications using MVP or MVVM patterns
Applying data structures and algorithms within performance-sensitive systems
Designing and architecting system components across multiple applications
Profiling memory usage, tuning performance, and supporting unit testing practices

Job Responsibility

Development and delivery of high-quality software solutions by using industry aligned programming languages, frameworks, and tools. Ensuring that code is scalable, maintainable, and optimized for performance
Cross-functional collaboration with product managers, designers, and other engineers to define software requirements, devise solution strategies, and ensure seamless integration and alignment with business objectives
Collaboration with peers, participate in code reviews, and promote a culture of code quality and knowledge sharing
Stay informed of industry technology trends and innovations and actively contribute to the organization’s technology communities to foster a culture of technical excellence and growth
Adherence to secure coding practices to mitigate vulnerabilities, protect sensitive data, and ensure secure software solutions
Implementation of effective unit testing practices to ensure proper code design, readability, and reliability

What we offer

medical, dental and vision coverage
401(k)
life insurance
other paid leave for qualifying circumstances
incentive award
Competitive holiday allowance
Life assurance
Private medical care
Pension contribution

Fulltime

C#.NET Software engineer - Trading applications

Talan is seeking a proactive and skilled Full-Stack Application Developer to joi...

Location

United States , New York

Salary:

110000.00 - 160000.00 USD / Year

Talan

Expiration Date

Until further notice

Requirements

Bachelor’s in Computer Science, Engineering, Finance, or similar
5+ years of relevant experience in Front Office or financial services background
Knowledge of Fixed Income & Capital Markets
Exposure to pricing or risk analytics
Strong OOP and .NET/C# development
Solid grasp of design patterns, Dependency Injection, Entity Framework
Proficient in SQL and relational databases
Familiar with scripting (e.g., Python, PowerShell)
Experience with Git and CI/CD in Agile environments

Job Responsibility

Design, develop, and support real-time pricing and analytics tools for Fixed Income trading (full stack)
Act as a key point of contact for front-office users (traders, sales, quants)
Gather business requirements and translate them into technical specifications
Own software delivery, maintenance, and support across all levels (L1–L3)
Collaborate with global teams to adapt and deploy tools
Follow Agile methodologies and CI/CD best practices

What we offer

401(k) retirement plan with company matching
15 days of paid vacation per year at hire and up to 27 according to seniority (annual untaken vacation days are cashed out)
8 paid holidays + 5 sick days + 2 personal days per year
Company health, dental, and vision insurance plans + FSA
Voluntary STD and LTD
Commuter/transit benefits

Fulltime

New

Software Engineer II

We envision a world where every employee has a voice and every organization list...

Location

United States , Redmond; Mountain View

Salary:

100600.00 - 199000.00 USD / Year

Microsoft Corporation

Expiration Date

Until further notice

Requirements

Bachelor's Degree in Computer Science or related technical field AND 2+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience
Master's Degree in Computer Science or related technical field AND 3+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR Bachelor's Degree in Computer Science or related technical field AND 5+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience
2+ years of professional experience building, delivering, and maintaining web applications or services (Azure or comparable cloud)
Demonstrated experience shipping at least one production service or feature end-to-end, including deployment and operational support
Solid proficiency in .NET and C#
Technical abilities around service design, coding, debugging, and problem solving
Exposure to agentic/AI‑driven workflows
Prompt and Model Evaluation Frameworks and practices
Azure Cloud Infrastructure Experience
Commitment to delivering the best experience for customers

Job Responsibility

Design & build backend services and APIs that are reliable, observable, secure, and performant
Build intuitive, AI‑driven experiences by composing services with inference, orchestration, and guardrails
Build AI prompt evaluation pipelines and model / prompt deployment gates
Own feature areas end‑to‑end: requirements shaping, design reviews, implementation, testing, rollout, and telemetry
Implement cloud-native infrastructure on Azure with a focus on reliability, performance, and cost efficiency
Instrument services end‑to‑end with structured logging, metrics, distributed tracing, and dashboards to ensure operability and rapid incident triage
Collaborate across disciplines (PM, Frontend, Data/People Science, SRE) to land pragmatic, data‑informed trade‑offs
Operate what you build: participate in on‑call, incident triage, and post‑incident improvements (prevention over recurrence)
Document and share designs, patterns, and learnings
contribute to a supportive, inclusive team culture

What we offer

Relocation assistance within the United States is available for this role

Fulltime

Senior Full-Stack Engineer

As a Senior Full-Stack Engineer, you will design, build, and deliver cutting-edg...

Location

Poland , Gdańsk

Salary:

Not provided

Mastercard

Expiration Date

Until further notice

Requirements

5+ years of software engineering experience, with proven expertise across backend and frontend development
Strong skills in .NET
Proficiency in React
Experience working with RESTful APIs, microservices, and cloud environments (AWS, GCP, or Azure)
Solid understanding of UI/UX principles, responsive design, and accessibility standards
Experience collaborating with designers and product teams to bring user-centric solutions to market
Knowledge of modern software engineering practices: CI/CD, automated testing, code reviews, Agile/Scrum
Excellent communication and stakeholder management skills
Accountable, detail-oriented, proactive, and able to work independently in a fast-paced environment

Job Responsibility

Plan, design, and develop full-stack solutions that meet business requirements while adhering to Mastercard’s standards, processes, and best practices
Collaborate with UI/UX designers to implement responsive, accessible user interfaces with React
Ensure front-end applications meet WCAG accessibility guidelines, deliver great performance, and are optimised for multiple devices
Build and maintain scalable backend services and APIs, integrating with Mastercard’s Open Finance ecosystem
Ensure high code quality with unit/integration testing, peer reviews, and continuous integration
Contribute to the full software development life cycle, from requirements gathering to release and ongoing support
Troubleshoot, debug, and resolve production issues, ensuring service reliability and performance
Mentor junior engineers and promote knowledge sharing across the team
Partner with product owners and stakeholders to prioritise features, communicate progress, and manage trade-offs
Stay current with industry trends, frameworks, and best practices in both frontend and backend technologies

Fulltime

Staff Software Engineer

As a Staff Software Engineer, you will play a crucial role in building the next ...

Location

United States , Pleasanton

Salary:

193000.00 - 242000.00 USD / Year

BlackLine

Expiration Date

Until further notice

Requirements

Bachelors Degree in, Computer Science or related disciplines
7+ years of professional experience in building Web scale highly available multi-tenant SaaS with focus on backend platform, frameworks, RESTful APIs and microservices
Expert in one or more object-oriented programming languages - C#, Java or C++
Fluent in .NET, SQL, No-SQL, data modeling and transactional flows
A solid computer science foundation including data structures, algorithms, and design patterns, with a proven track record of writing high concurrency, multi-threaded, secure, scalable code
Proven experience delivering and extending highly extensible, modular applications with various models of extensibility such as white-box, glass-box, gray-box, and black-box
Experience as a technical lead for design, architecture and code review of highly scalable distributed systems and event driven architecture
Superior analytical, problem-solving and system level performance analysis abilities
Excellent written and verbal communication skills
Adaptable team player with strong collaboration skills and a focus on results and value delivery

Job Responsibility

Provide technical expertise and leadership in requirements analysis, design, effort estimation, development, testing and delivery of highly scalable and secure distributed backend services
Work with product management, architects and other engineering teams to understand stated and unstated needs and turn them into functional and technical requirements
Maintain a strong sense of business value and return on investment in planning, design, and communication
Lead technical design and architecture discussions and help drive technical decisions while making appropriate trade-offs on technology, functionality, robustness, performance and extensibility
Estimate the project scope and timelines, and consistently deliver on those commitments
Implement, refine, and enforce software development techniques to ensure that the delivered features meet software integration, performance, security, and maintainability expectations
Research, test, benchmark, and evaluate new tools and technologies, and recommend ways to implement them in product development
Maintain high standards of software quality and technical excellence within the team by establishing good practices and writing clean, testable, maintainable, and secure code
Inspire a forward-thinking team of developers, acting as an agent of change and evangelist for a quality-first culture within the organization
Mentor and coach team members, guide them to solutions on complex design issues and do peer code reviews

What we offer

short-term and long-term incentive programs
robust offering of benefit and wellness plans

Fulltime

New

Technology Project Manager

Critically important to our business, market data is utilized by every trading s...

Location

United States , Bala Cynwyd (Philadelphia Area), Pennsylvania

Salary:

Not provided

Susquehanna International Group

Expiration Date

Until further notice

Requirements

Bachelor's degree required
a degree in a technical concentration is a plus
Minimum of 3-10 years of experience providing application and/or systems implementation and technical business analysis / project management services required
Knowledge of SDLC required
experience with Kanban or Scrum preferred
Experience working with JIRA and Confluence preferred
Must demonstrate a solid understanding of technical workflows
Knowledge of scripting (Python, Shell)
Eagerness to learn and a strong ability to work autonomously
PMP certification is a plus

Job Responsibility

Support projects that facilitate high speed processing of large volumes of data using varied technologies crossing .NET, Python, C++ and the infrastructure that employ them
Interface with our trading, business, and engineering teams along with the exchanges themselves as you analyze market and reference data and any changes made to their infrastructure that could impact our business
Approach initiatives that span new software delivery and/or enhancements to our existing systems utilizing the agile methodologies that best suit the project you’re working on
Manage exchange driven changes to ensure that necessary enhancements to our systems are made, within required timeframes
Ensure internal teams, and the external resources you’re working with, are kept updated as you manage projects and deliverables within the most efficient and optimal timeline
Partner with stakeholders and project teams to translate business requirements into practical solutions.

C#.NET Software engineer - Trading applications

Talan

Location:
United States , New York City

Category:
IT - Software Development

Contract Type:
Employment contract

Salary:

Job Description:

Job Responsibility:

Requirements:

Additional Information:

Job Posted:
January 13, 2026

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