Java Swing Developer; W2​/No C2C)

Position: Java Swing Developer (W2 Only / No C2C)
Location: New York

Our client is seeking a highly technical, hands-on Java developer. Our group is focused on bringing a new level of efficiency, transparency and openness to the trading process by building a collaborative community of investors, brokers, technology firms and content providers.
This role involves maintenance and enhancement of existing backend and web-based applications, and contributing to the evolution of our trading platform and web user interfaces.

Role responsibilities:

Contributes to design, development, and implementation of backend services and web applications.
Writes clean, maintainable, and well-tested code following established engineering practices.
Participates in technical design discussions and collaborates with senior engineers and architects.
Works closely with frontend developers to integrate backend services with UI components.
Supports troubleshooting, debugging, and performance optimization of applications.
Breaks down user stories into technical tasks and delivers within agreed timelines.
Collaborates effectively in Agile teams with product owners, QA, and other developers.
Maintains and improves existing systems while ensuring stability and reliability.
Builds positive relationships within the team and contributes to a collaborative environment.
Communicates technical concepts clearly to both technical and non-technical stakeholders.
Continuously develops technical expertise and stays up to date with modern technologies and frameworks.
Required skills
Strong Java fundamentals (Java 21 preferred) including core concepts (collections, concurrency, memory management).
Solid experience with Spring Framework (Spring 4+) and Spring Boot 3.x.
Experience building and consuming REST APIs.
Good knowledge of React (version 17) and integration with backend services.
Strong understanding of web application architecture and client-server communication.

Experience with SQL and relational databases (e.g. PostgreSQL).
Proficiency with version control (Git) and build tools (Maven/Gradle).
Strong focus on clean code, unit testing, and code reviews.
Familiar with Agile development practices.
Comfortable working in Linux/Unix environments.
4-8+ years of software engineering experience.
Other desirable skills

Experience with JSF / JSP applications and legacy UI technologies.
Familiarity with modern frontend practices and component-based architectures.

Experience with CI/CD pipelines and testing practices.
Exposure to Docker / containerization.
Basic understanding of distributed systems.
Familiarity with Spring ecosystem tooling.
Knowledge of financial systems or trading platforms is a plus.
Skills
Java, trading, Java Swing, Springboot, rest api, React, ci/cd
Top Skills Details
Java, trading, Java Swing
Additional Skills & Qualifications
Secondary skills include experience with Spring Boot and the Spring ecosystem, REST API development, React, SQL/PostgreSQL, Linux/Unix environments, Git, Maven/Gradle, CI/CD pipelines, Docker/containerization, distributed systems, and modern frontend architectures. Familiarity with JSF/JSP and other legacy UI technologies is also beneficial, as portions of the platform may leverage older frameworks. Exposure to financial services, electronic trading, or capital markets environments is preferred but not required.

Strong testing practices, code review experience, and the ability to work effectively within Agile teams are also valued.
Job Type & Location
This is a Contract position based out of New York, NY.
Pay and Benefits
The pay range for this position is $90.00 - $100.00/hr.
Individual compensation offered for this position within this range will depend on many factors, including qualifications, skills, relevant experience, job knowledge, geographic location, internal equity, and other pertinent job-related factors.
Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following:
Medical, dental & vision Critical Illness, Accident, and Hospital 401(k) Retirement Plan - Pre-tax and Roth post-tax contributions available Life Insurance (Voluntary Life & AD&D for the employee and dependents) Short and long-term disability Health Spending Account (HSA) Transportation benefits Employee Assistance Program Time Off/Leave (PTO, Vacation or Sick Leave)
Workplace Type
This is a hybrid position in New York,NY.
Final date to receive applications
This position is anticipated to close on Sep 14, 2026.

About TEKsystems

We're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive…