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 pillars: People, Process, Trading Edge, and Technology. Simplex is an in-office organization, helping to foster a collaborative and communicative culture.
Simplex Trading is seeking a motivated, detail-oriented Senior Accountant to join our Finance team in our Chicago, Illinois office. This is a full-time, in-office position. The Senior Accountant will play a critical role in maintaining the accuracy and integrity of the firm’s financial records, supporting regulatory compliance, and driving process improvements across our accounting function. The ideal candidate has experience in a broker-dealer or financial services environment, a strong command of GAAP, and a proactive mindset for identifying and implementing efficiencies.
KEY RESPONSIBILITIESGeneral Ledger & Month-End Close- Own and execute the monthly and quarterly close process, including journal entries, account payable, account reconciliations, and variance analysis
- Maintain the general ledger and ensure accuracy and completeness of all financial data
- Coordinate with Accountant, operations and trading teams to reconcile trade invoicing
- Maintain working knowledge of applicable SEC and FINRA financial responsibility rules, including SEC Rules 15c3-1, and ensure the firm remains in compliance. Prepare monthly and quarterly FINRA reporting in a timely and accurate manner.
- Liaise with external auditors, regulators, and compliance personnel as needed
- Assist in the preparation of federal, state, and local tax returns and estimated tax payments
- Support the annual tax provision process and maintain tax-related workpapers and documentation
- Coordinate with external tax advisors on tax planning and compliance matters
- Monitor changes in tax legislation relevant to broker-dealers and proprietary trading operations
- Prepare accurate monthly, quarterly, and annual financial statements in accordance with GAAP
- Support the preparation of management reports and financial analysis for senior leadership
- Assist in the annual audit process, serving as a primary contact for external auditors and preparing audit schedules and supporting documentation
- Ensure financial reports are completed accurately and on schedule
- Own the firm's credit card spend and expense reimbursement program, including policy enforcement, employee communication and monthly reporting.
- Identify opportunities to streamline and automate accounting processes
- Participate in the evaluation and implementation of accounting systems and technology
- Document accounting policies and procedures and recommend improvements to enhance internal controls
- Collaborate cross-functionally with technology and operations teams on finance-related system initiatives
- Bachelor’s degree in Accounting, Finance, or a related field
- 4-7 years of progressive accounting experience, preferably 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
- Strong working knowledge of GAAP and financial reporting standards
- CPA license (active)
- Experience with options, derivatives, or equity securities accounting, a plus
- Exposure to process automation tools or accounting system implementations such as Claude, NetSuite or Intacct
- Public accounting experience is a plus
Annual base salary ranges from $130,000 to $150,000, 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 $2,000 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. Simplex and its recruitment partners may use artificial intelligence (AI) tools to support certain aspects of the recruiting and hiring process. Final hiring decisions are made by humans. For all job postings, Simplex may use AI to review and analyze applications, resumes, interviews, and applicant responses. Simplex complies with applicable federal and state laws governing AI use. Applicants may still request reasonable accommodations. For more information related to AI or to request an accommodation, please contact [email protected].
Skills Required
- Bachelor's degree in Accounting, Finance, or a related field
- 4-7 years of progressive accounting experience
- Strong working knowledge of GAAP and financial reporting standards
- CPA license (active)
- Willing to sit for FINRA licensing exams
What the Team is Saying
Simplex Trading Compensation & Benefits Highlights
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Healthcare Strength — Healthcare coverage includes free employee medical along with dental and vision options. Mental health support and FSAs are also referenced, indicating a broad health benefits scope.
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Retirement Support — A 401(k) with company match is part of the core package. Life and disability insurance further reinforce longer‑term financial security.
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Wellbeing & Lifestyle Benefits — Daily meal stipends, a stocked kitchen, and access to an onsite or building gym support day‑to‑day wellbeing. Commuter benefits and regular social events further enhance lifestyle perks.
Simplex Trading Insights
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.
