Haystack
← Back to Jobs
Technology
IB

Senior Software Developer - Client Tax

IBG, LLCGreenwich, CT🇺🇸United StatesPosted 15 Aug 2026

Why This Role Stands Out

This hybrid role offers you the chance to take significant technical ownership within a mission-critical team focused on client tax systems, driving innovation in financial services technology. You'll thrive here if you're eager to deepen your expertise in Java, Oracle, and large-scale systems, contributing to impactful improvements while enjoying a flexible work environment.

Quick Overview

Work Type
Hybrid
Level
Mid Senior

Job Description

This is Hybrid role (3 days in office / 2 day remote)

About Your Team

You will be joining the Client Tax (TaxCust) group within the broader Client Tax Team. While the Client Tax Team covers a wide range of tax-related functions, TaxCust is specifically focused on the development and maintenance of the systems that power our client-facing tax operations. Our core responsibilities include:
  • Maintaining and continuously improving the enterprise brokerage tax form collection and reporting system
  • Maintaining and improving the Oracle data models and XML schemas that underpin our tax data architecture
  • Maintaining and improving the Java-based processing and reporting programs that drive our tax workflows
  • We are a technically focused team operating at the intersection of financial services and enterprise software engineering, building and evolving mission-critical systems that serve clients at scale.

Your Role

As a new member of TaxCust, you will take on meaningful technical ownership from day one. Over your first two years, your responsibilities will include:
  • Maintaining and improving the enterprise brokerage tax form collection and reporting system
  • Maintaining and improving related Oracle data models and XML schemas
  • Maintaining and improving processing and reporting Java programs
  • Extracting technical requirements from business specifications for the tax form collection and reporting system
  • Planning and implementing end-to-end system improvements across the full technology stack
  • Analyzing and resolving production incidents, ensuring system stability and reliability
  • Analyzing resource usage and scalability bottlenecks and implementing targeted improvements
  • Planning and implementing a transition from a bulk processing model to an event-based processing architecture
  • This is a highly impactful role where your contributions will directly shape the reliability, scalability, and evolution of a core enterprise platform.

Must-Have Skills
  • Strong database knowledge and experience, including data modeling and design
  • Experience working with large-scale data repositories
  • Strong object-oriented software development skills, with hands-on experience in Java, Spring, and REST APIs
  • Demonstrated ability to extract technical specifications from business requirements
  • Proven ability to plan, implement, and lead complex software projects from inception to delivery
  • Detail-oriented and quality-focused mindset with a commitment to engineering excellence

Nice-to-Have Skills
  • Familiarity with US and international tax regulations and reporting requirements
  • Knowledge of or experience with IRS tax forms (W-8, W-9) and IRS tax reporting (1099)
  • Knowledge of or experience with CRS (Common Reporting Standard) tax reporting

Company Benefits & Perks
  • Competitive salary, annual performance-based bonus and stock grant
  • Retirement plan 401(k) with competitive company match
  • Excellent health and wellness benefits, including medical, dental, and vision benefits. Company paid medical healthcare premium.
  • Wellness screenings and assessments, health coaches and counseling services through an Employee Assistance Program (EAP)
  • Daily company lunch allowance provided and a fully stocked kitchen with healthy options for breakfast and snacks
  • Corporate events including team outings, dinners, volunteer activities and company sports teams
  • Education reimbursement and learning opportunities

Skills

Oracle
Spring
Java
REST

Similar jobs