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 RESPONSIBILITIES

General 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.

Regulatory Reporting & Compliance

• Maintain working knowledge of applicable SEC and FINRA financial responsibility rules.
• Support the annual audit process by preparing audit schedules and supporting documentation.

Financial Analysis & Database Reporting

• 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.

Technology & Process Improvement

• 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.

QUALIFICATIONS

Required

• 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.

Preferred

• 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.

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 RESPONSIBILITIES

General 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

Regulatory Reporting

• 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

Tax Preparation & Compliance

• 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

Financial Statements & Reporting

• 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

Technology & Process Improvement

• 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

QUALIFICATIONS

Required

• 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)

Preferred

• 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

Career Description

Simplex is looking for smart, curious, and driven individuals to join our technology team. Technology at Simplex is the core of the business. We are a leading technology-driven proprietary market-making firm. You will be someone excited by challenges and proactive in problem-solving. 

What will you be doing?

• Develop and maintain monitoring and deployment systems (Systems and Network)
• Triage and respond to issues
• Prepare and execute changes to the Linux environment
• Maintain and deploy servers and workstations
• Projects will be completed both independently and as a part of a team, when necessary
• This is an in-office position, with occasional onsite work at several colocation facilities in Chicago, Aurora, and New Jersey
• Infrequent evening/weekend work to allow for change execution outside of trading hours
• Other opportunities as assigned

Skills and Experience:

• 3+ years of experience as a System Administrator, Linux Administrator, or similar
• Thorough understanding of Linux (kernel, modules, filesystems) with special emphasis on the network stack, especially multicast, and OpenOnload
• Experience working with Linux and standard tools (bash, grep, sed, awk) and scripting languages (Python, Perl, bash)
• Understanding of Linux concepts (kernel, modules, memory allocation, filesystems)
• Familiarity with common server technologies (IPMI, SNMP), or software (Nagios, Ansible, dnf/rpm, git)
• Experience troubleshooting complex performance issues
• Ability to lift and move heavy equipment (40-50 lb regularly)

Career Description

We are seeking a highly skilled and experienced Automation Engineer to join our team. The ideal candidate will be responsible for designing, implementing, and maintaining automation systems that improve efficiency, reduce errors, and optimize processes across various functions of our company. This role requires a blend of technical expertise in automation technologies, problem-solving skills, and a keen understanding of operational processes. 

What will you be doing?

• Collaborate with cross-functional teams to understand process requirements and identify opportunities for automation
• Write and maintain code for automation scripts and frameworks. Configure and integrate automation tools and software as per project needs
• Perform thorough testing of automated systems to ensure reliability, effectiveness, and compatibility with existing systems
• Provide ongoing maintenance and support for automation solutions. Troubleshoot and resolve issues to ensure minimal downtime
• Stay abreast of emerging automation technologies and methodologies. Propose and implement improvements to existing automation systems
• Work closely with IT, software development, and operational teams to align automation solutions with business objectives
• Other opportunities as assigned

Skills and Experience:

• Bachelor’s degree in Computer Science, Engineering, or a related field
• 3+ years of proven experience as an Automation Engineer or in a similar role
• Proficiency in a Linux environment
• Strong programming skills in languages such as Python or similar
• Knowledge of Bash and SQL or similar database language is necessary
• Experience with automation tools and frameworks (e.g., Ansible, Docker) a plus
• Experience with web programming, Ruby, C++, and the trading industry a plus

We are seeking a Strategy and Operations Manager to manage firm-wide initiatives that improve operational efficiency, performance reporting, and strategic execution across trading, risk, and corporate functions. This role is ideal for someone who thrives in a high-ownership environment, is highly analytical, and can translate messy business needs into structured solutions. Reporting directly into the CEO, you will partner with leadership and cross-functional teams to improve processes, build reporting visualizations and dashboards, and drive key initiatives that support growth.

What will you be doing?

• Manage high-priority projects from progress tracking to implementation
• Build structured analysis to support leadership decision-making
• Partner with cross-functional  teams to improve workflows, reduce manual processes, and identify operational bottlenecks and implement improvements
• Identify opportunities for, and drive automation and workflow improvements 
• Help build, maintain and improve reporting for performance, operational KPIs, and risk-related metrics using Excel, SQL, and/or BI tools
• Document processes and develop standard operating procedures (SOPs) for recurring workflows
• Support analysis of trading P&L drivers, costs, performance attribution, and operational trends
• Improve data integrity by identifying inconsistencies, gaps, and process failures

Skills and Experience:

• Bachelor’s degree from an accredited university
• 3 - 5 years of experience in a highly analytical role managing deliverables
• SQL experience and comfort working directly with data
• Experience with Tableau, Power BI, Looker, or similar tools
• Experience implementing process automation and AI tools
• Strong analytical thinking and comfort working with ambiguity
• Ability to communicate clearly with both technical and non-technical teams
• The role requires handling sensitive executive and HR data, demanding a high level of discretion

Nice to have Skills:

• Experience in a proprietary trading firm or market maker environments
• Management consulting experience

Career Description

Simplex is looking for smart, curious, and driven individuals to join our technology team. Technology at Simplex is the core of the business. We are a technology company, specializing in high speed trading. We are looking for great people to work on all aspects of our trading system.

What will you be doing?

• Work on our system from trading algorithm development, to high speed data analysis, and intelligent execution engine design
• Design, build, and maintain efficient, reusable, and reliable C++ code on Linux
• Other opportunities as assigned

Skills and Experience:

• 4+ years experience working with a high level language (ex C++, Java, C#)
• Some C++ experience is a plus
• Linux/Unix exposure
• Previous financial industry experience is a plus
• Computer science or engineering degree or real world experience

Career Description

Simplex is looking for smart, curious, and driven individuals to join our technology team. Technology at Simplex is the core of the business. We are a technology company, specializing in high speed trading. We are looking for great people to work on all aspects of our trading system. The job will require lots of programming and working on new projects on a regular basis. Will own the entire development life cycle of projects (develop, simulate, image test, deployment).

What will you be doing?

• Designing FPGA logic to support various trading objectives
• Analyzing the results on a day to day basis and looking for methods to speed up designs

Skills and Experience:

• Verilog/System Verilog
• Working on timing closure of designs/experience with STA
• Experience with developing and verifying FPGA designs
• Experience developing low latency applications

Nice to have Skills:

• Experience with Python a plus
• Experience with ASIC designs a plus
• Experience in equity options/financial markets a plus