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Senior Java Developer
Job in
Greenwich, Fairfield County, Connecticut, 06831, USA
Listed on 2026-10-17
Listing for:
Colonial Group
Full Time
position Listed on 2026-10-17
Job specializations:
-
Software Development
Java Developer, Backend Developer, Software Engineer
Job Description & How to Apply Below
This is Hybrid role (3 days in office /2 days remote)
About your Team:
Our team builds and supports mission-critical applications that power Interactive Brokers' back office, accounting, treasury, and compliance functions globally.
We're looking for a Senior Java Developer to drive the full software development lifecycle — from planning and prioritization through testing and release. With strong technical depth and the communication skills to align technical and business stakeholders.
This role suits someone who is organized, deadline-driven, process-disciplined, and thrives in cross-functional collaboration.
Key Responsibilities
:
- Design, develop, and maintain high-performance, scalable, and resilient financial applications
- Optimize and refactor existing code to improve reliability and performance.
- Partner with other developers and stakeholders to plan, prioritize, and deliver development initiatives
- Validate AI-assisted or AI-refactored code with sufficient automated test coverage before submitting for review.
- Conduct thorough code reviews — including validation of testing results — and ensure large change sets are broken into reviewable units
- Collaborate across teams to implement and roll out solutions in both production and development environments.
- Proactively identify and resolve technical issues before they impact downstream systems
Required Qualifications
:
- Bachelor's or Master's degree in Computer Science, Information Technology, or a related field.
- 5-10 years of experience designing and building medium-to-large scale applications using Java and/or Python/Perl on Linux platform.
- Strong hands-on experience with Java Spring, including both Spring Boot (micro services) and traditional Spring applications.
- Strong grasp of object-oriented design principles and common design patterns.
- Experience with JDBC and relational databases (Oracle preferred).
- Hands-on experience using AI-assisted development tools (e.g., Claude, Git Hub Copilot, or similar) across the software development life cycle.
- Excellent collaboration and communication skills, with experience partnering across development teams on critical roll outs.
- Knowledge of financial instruments or a strong motivation to learn financial markets and concepts.
Nice to have :
- Experience with Git, Gerrit, Bitbucket, Gradle, and/or Ivy.
- Experience building or integrating MCP (Model Context Protocol) servers to connect AI tools with internal systems, enabling faster, AI-assisted development workflows.
- Experience developing web applications using Spring Boot
- Experience with SWIFT MT/MX messaging standards.
- Hands-on experience with AWS, including data lake architectures (using Parquet file formats), Athena, and EC2, for building and operating data driven, production-grade applications.
What makes you successful in this role :
- Strong technical and business knowledge
- Self-motivated, results-oriented, and able to work independently with minimal supervision
- Strong analytical and problem-solving capabilities.
- Excellent verbal and written communication skills.
- Outstanding organizational and time-management discipline.
- Competitive salary, annual performance-based bonus, and stock grant awards
- 401(k) retirement plan with competitive company match
- Excellent health and wellness benefits, including medical, dental, and vision benefits. 100% employer-paid medical premiums, with generous employer contributions to dental & vision plans as well.
- Wellness screening and assessments, health coaches, and counseling services through an Employee Assistance Program (EAP)
- Generous paid parental leave (up to 16 weeks paid parental leave for eligible employees)
- Company-paid basic life insurance, accidental death & dismemberment (AD&D), and short- and long-term disability coverage
- Flexible Spending Accounts (Healthcare, Dependent Care, and Commuter FSAs)
- Quarterly fitness stipend to offset costs associated with traditional gym and fitness memberships or fees
- Education reimbursement and professional development opportunities
- Legal services, telehealth access, and voluntary insurance options
- Backup child and adult care support through
- Daily lunch allowance and fully stocked kitchen with healthy breakfast and snack options
Position Requirements
10+ Years
work experience
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