Job Description
Our employees are truly our greatest asset. We have spent years building a team of talented dedicated technologists data-driven traders and expert leaders with an emphasis on our core values: Collaboration Ethics Risk Management and Diverse Experience and Opinions. Simplex is an in-office organization helping to foster a collaborative and communicative culture.
Simplex Trading is seeking a motivated analytically-minded Business Intelligence Analyst / Accountant to join our Finance team in our Chicago Illinois office. This is a full-time in-office position for a candidate who sits at the intersection of finance and technology — someone equally comfortable querying a trading database as closing the books. You will own day-to-day accounting responsibilities while also serving as a key driver of process automation initiatives and data-driven financial analysis across the firm’s proprietary databases. The ideal candidate has a strong accounting or finance foundation hands-on SQL proficiency and a genuine enthusiasm for replacing manual workflows with scalable technology-driven solutions.
KEY RESPONSIBILITIESGeneral Ledger & Month-End Close- Execute monthly and quarterly close processes including journal entries accounts payable account reconciliations accruals and variance analysis; submit completed entries to the Senior Accountant for review and approval.
- Own the accounts payable process end-to-end including invoice coding payment processing vendor reconciliation and aging report.
- Maintain the general ledger and ensure accuracy completeness and timeliness of all financial data.
- Assist in preparing monthly quarterly and annual financial statements in accordance with GAAP.
- Maintain working knowledge of applicable SEC and FINRA financial responsibility rules.
- Support the annual audit process by preparing audit schedules and supporting documentation.
- Write optimize and maintain SQL queries to extract transform and analyze financial data from the firm’s trading and operational databases.
- Build and maintain dashboards and recurring reports that provide P&L drivers position exposures fee structures and other key performance indicators for senior leadership.
- Conduct ad-hoc deep-dive analyses on trading financial data.
- Administer the firm's credit card spend and expense reimbursement program including transaction coding and reconciliation.
- Identify and eliminate manual repetitive finance workflows – including close processes reconciliations and management reporting – through scripting macros or low-code/no-code tools in close collaboration with the Senior Accountant.
- Contributing to evaluations of new accounting and finance technology providing requirements testing and implementation support.
- Stay current on emerging tools and technologies relevant to finance automation (e.g. Python Claude dbt Airflow RPA platforms) and proactively propose improvements.
- Bachelor’s degree in Accounting Finance Information Systems or a related quantitative field.
- 3-5 years of experience in accounting financial analysis or a related finance role ideally within a broker-dealer proprietary trading firm or regulated financial services environment.
- Willing to sit for FINRA licensing exams to ensure regulatory compliance with the scope of the role
- Hands-on proficiency with SQL; comfortable writing complex queries (joins subqueries window functions CTEs) against large relational databases.
- Strong working knowledge of GAAP and financial reporting standards.
- Demonstrated experience identifying and implementing process automation or efficiency improvements in a finance context.
- Experience with a data visualization or BI tool such as Power BI Tableau or Looker.
- Scripting experience in Python or VBA for finance automation use cases.
- Exposure to data engineering concepts (Extract Transform Load pipelines data warehouses dbt or similar).
- Familiarity with options derivatives or equity securities accounting.
- Public accounting experience (Big 4 or regional firm) is a plus.
Annual base salary ranges from $100000 to $120000 and is influenced by a number of factors including qualifications and experience. This role is also eligible for an annual discretionary bonus which can be a significant portion of total compensation. This full time role is also eligible for other forms of compensation and benefits including health/dental/vision insurance and 401(k) contributions.
Why us?
Founded in Chicago in 2004 Simplex is a leading technology-driven proprietary market-making firm. We work with the most advanced technology and software in the market and we’ve continued to remain at the forefront of the industry by always focusing on innovation automation and data-driven analysis. We also leverage our experience and expertise to make strategic investments and capitalize on opportunities in the venture capital markets with promising early-stage financial and technology start-ups.
PLUS the goods!
- Benefits: Excellent a la carte Medical/Dental/Vision (free employee coverage!) 401(k) match generous parental leave!
- The Office: The kitchen is stocked with snacks and beverages; you also have daily stipends for breakfast and lunch!
- Tuition Reimbursement: As an investment in our employees’ careers and the company’s future we offer educational assistance to provide employees with professional development opportunities that increase their skills and enhance their contributions to the organization!
- Employee Discounts: To gyms national brands and more!
- Building: We are located in the Federal Reserve building. As a tenant you have access to a building gym and a full cafeteria. We are easily accessible to all public transportation.
- Charity Match: We match up to $2000 a year in donations to the charities of your choice!
- Fun Events: In-person happy hours celebrations throughout the year game nights video game fun and so much more!
Simplex is an Equal Opportunity Employer
Top Skills
What the Team is Saying
What We Do
Since our founding in 2004 Simplex has continued to remain at the forefront of the industry by focusing on innovation automation and data-driven analysis. Simplex is a leading technology-driven market-making firm that builds proprietary software to create and capitalize on financial opportunities. We combine talented and dedicated technologists with data-driven employees to solve constantly evolving puzzles in the marketplace. Specializing in US Equity Options and Future Options Simplex provides the liquidity essential to a competitive fairly-functioning marketplace. We continue to reinvent ourselves and evolve to best capitalize on financial market opportunity.
Why Work With Us
We are one team working towards a common collective goal and the collaborative environment we create allows our team’s talents to shine. We value highly-motivated passionate individuals with diverse opinions and experiences.
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Simplex Trading Offices
OnSite Workspace
As a part of our commitment to fostering collaboration innovation and team culture all employees in this role are expected to work onsite.
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Date Posted
04/24/2026
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