Director, Financial Engineering

Fidelity Investments Inc.; Boston (MA); On-site; USD 170,000 - 185,000; Full time

Job summary

Fidelity Investments Inc. is seeking a senior quantitative engineer to generate insights from historical and real-time data using Python and KDB/Q. You will assess trading costs, build models, and advance execution strategies in U.S. equity markets.

You will lead development of evaluation frameworks, ML-enabled optimizers, and analytics to improve best-execution and scalability across client objectives, collaborating with trading and technology teams on Agile projects.

Qualifications

• Candidate with 6+ years in director-level financial engineering or similar roles.
• Experience performing transaction cost analysis in US markets with KDB/Q and Python.
• Strong ML, statistical, and optimization modeling for trading platforms.

Responsibilities

• Leads research on experimental design, measurement standards, and analytical controls.
• Defines performance frameworks to evaluate systematic trading platforms.
• Analyzes trading and execution data to reduce costs and improve customer outcomes.
• Develops methods to assess impact of market conditions on performance.
• Translates research into scalable platform improvements via Agile.
• Evaluates execution quality and post-trade trends; suggests method changes.
• Applies ML models to optimize execution algorithms and minimize impact.
• Researches market structure, routing, liquidity dynamics, client behavior.
• Creates prototypes to assess broker performance and strategic insights.
• Collaborates with trading, order flow and tech teams to improve best-execution.

Skills

Python

KDB/Q

Machine Learning

Quantitative forecasting

Statistical analysis

Optimization

DeFi analysis

AWS

Education

Bachelor's degree in Computer Science/Engineering/IT/FinTech

Master's degree in Computer Science/Engineering/IT/FinTech

Tools

scikit-learn

Vowpal Wabbit

AWS

Job description

Fidelity will not provide immigration sponsorship for this position.

Job Description:

Note: Fidelity will not provide immigration sponsorship for this position.

Position Description:

Generates insights from historical and real-time data using Python and KDB/Q to assess cost of trading, constructing cost models and conduct transaction cost analysis, evaluating execution quality, and developing systematic algorithm selection framework. Designs and advances systematic trading platforms within U.S. equity markets, integrating real-time intelligence into optimized execution strategies. Leads the development of models, performance measurement systems, and analytical frameworks that enhance execution quality, scalability, and performance across diverse client objectives. Develops optimization framework that improve execution quality given flow complexion and dealer competitions in equity and options. Conducts market structure, liquidity, and venue behavior research using public data, leveraging cloud-based virtual machines in Amazon Web Services (AWS) for analysis.

Primary Responsibilities:

• Leads research on experimental design, measurement standards, and analytical controls to drive continuous platform improvement.
• Defines performance frameworks to evaluate systematic trading platforms and inform strategic enhancements.
• Analyzes trading and execution data to identify opportunities, reduce transaction costs, and improve customer outcomes.
• Develops analytical methods to assess the impact of market conditions on platform performance and operational decision-making.
• Translates quantitative research findings into scalable platform improvements through Agile development processes.
• Evaluates execution quality and post-trade performance trends, recommending changes to methodologies or workflows based on analytical insights.
• Applies statistical and machine learning (ML) models to optimize execution algorithms, enhance trading performance, and minimize market impact.
• Leads research on market structure, routing logic, liquidity dynamics, and client behavior to inform execution strategy.
• Develops prototypes and analytical tools to assess broker performance and generate strategic insights.
• Collaborates with trading, order flow management, and technology teams to strengthen analytical capabilities and improve best-execution outcomes across asset classes.
• Analyzes decentralized finance (DeFi) protocols and partners with business, product, and technology teams to deliver scalable capabilities within the DeFi ecosystem.

Education and Experience:

Bachelor’s degree in Computer Science, Engineering, Information Technology, Information Systems, Financial Technology, or a closely related field (or foreign education equivalent) and six (6) years of experience as a Director, Financial Engineering (or closely related occupation) performing transaction cost analysis in US markets and analyzing historical trading data using KDB/Q and Python.

Or, alternatively, Master’s degree in Computer Science, Engineering, Information Technology, Information Systems, Financial Technology, or a closely related field (or foreign education equivalent) and two (2) years of experience as a Director, Financial Engineering (or closely related occupation) performing transaction cost analysis in US markets and analyzing historical trading data using KDB/Q and Python.

Skills and Knowledge:

Candidate must also possess:

• Demonstrated Expertise developing ML algorithms and quantitative forecasting tools including retail volume forecast, equity contextual trading algorithm selection, and fixed income municipal new issuance pricing using Python, KDB/Q, scikit‑learn (SK Learn), and Vowpal Wabbit; and conducting transaction cost analysis and algorithm selection using KDB/Q, leveraging cloud based virtual machines in AWS for analytical workflows.
• Demonstrated Expertise influencing dealer pricing and execution decisions using optimization models based on linear programming, implemented in KDB/Q and Python; and conducting simulations to project dynamics of market markers under varying market constraints using KDB/Q, python.
• Demonstrated Expertise performing statistical analysis of execution results using hypothesis testing techniques, including t-tests, analysis of variance (ANOVA), and non-parametric methods including Wilcoxon signed-rank and Mann–Whitney U tests; and applying bootstrap resampling techniques to detect information leakage, assess performance differences, and validate cost model stability through confidence intervals.
• Demonstrated Expertise conducting DeFi analysis by examining blockchain ecosystem architecture, gas-fee economics, and decentralized exchange models including automated market makers (AMMs) and liquidity aggregators; and validating on-chain data and supporting decentralized finance research through analysis of token issuance mechanisms.

Salary: $169,986.00 to $185,000.00/year.

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Fidelity’s Onsite Working Model
Fidelity is transitioning to a full-time onsite working model through a phased rollout across regions and roles. Currently, some roles and locations require 100% onsite presence, while others require less. Onsite expectations are likely to evolve as the rollout continues. This transition does not apply to fully remote roles.

Certifications:

Category:

Capital Markets Product

Please be advised that Fidelity’s business is governed by the provisions of the Securities Exchange Act of 1934, the Investment Advisers Act of 1940, the Investment Company Act of 1940, ERISA, numerous state laws governing securities, investment and retirement-related financial activities and the rules and regulations of numerous self-regulatory organizations, including FINRA, among others. Those laws and regulations may restrict Fidelity from hiring and/or associating with individuals with certain Criminal Histories.