Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Senior Python Developer

Mindlance

Senior Full Stack Developer

Location: McLean, VA – Fully onsite

Assignment Type: Contract Only

Scheduled End: March 31, 2027

Must Have Qualifications: At least 4 years of hands-on software development experience using a modern programming language (e.g., Python, Java, OR C##). Candidate must have Git version control, SQL, and Unit testing. Preferred: Shell scripting, financial domain with fixed income knowledge, graduate degree in Computer Science or Mathematics -similar degrees, Certs -CFA, FRM, CPA.

Position Overview

***'s Investments & Capital Markets division is currently seeking a Sr. Software Developer who can contribute to the firm's enterprise forecasting platform that supports long-term financial projections, enabling strategic planning and decision-making. The developer will be involved in developing and enhancing core features of the forecasting engines to improve model accuracy, performance, and scalability, as well as providing support for critical quarterly/yearly production runs used in financial reporting to ensure the integrity, accuracy, and timeliness of outputs. The developer will also collaborate closely with FP&A and other stakeholders to implement new forecasting capabilities, support scenario analysis, and meet evolving business and regulatory requirements.

Responsibilities

  • Refactor and modernize existing components of the financial accounting and forecasting application to improve maintainability, performance, and scalability.
  • Develop and enhance core forecasting engine features to improve model accuracy, runtime efficiency, and enterprise readiness.
  • Support critical quarterly production runs for financial reporting by monitoring execution, troubleshooting issues, and ensuring integrity, accuracy, and timeliness of outputs.
  • Diagnose and resolve defects, reduce technical debt, and drive continuous improvements to ensure alignment with software engineering best practices.
  • Write clean, robust, high-quality code following best practices, supported by automated unit and integration tests with strong coverage.
  • Coordinate with team members across different layers of the stack (data, services, APIs, and infrastructure) to deliver end-to-end solutions.
  • Partner with FP&A and other stakeholders to implement new forecasting capabilities, enable scenario analysis, and meet evolving business and regulatory requirements.
  • Assist with infrastructure upgrades, platform migrations, and adoption of new technologies to improve reliability, security, and operational efficiency.
  • Contribute to design discussions, code reviews, and documentation; demonstrate a commitment to collaborative problem-solving, thoughtful design, and high-quality deliverables

Qualifications

  • At least 4 years of hands-on software development experience using a modern programming language (e.g., Python, Java).
  • 1–2 years of experience using Git for source control in a team-based development environment.
  • 1–2 years of experience with SQL and relational database development.
  • 1–2 years of experience with containerization and orchestration technologies (e.g., Docker, Podman, Kubernetes).
  • Proficiency with shell scripting for automation, troubleshooting, and operational support.
  • 1–2 years of experience with unit testing frameworks (e.g., Pytest, JUnit) and implementing automated test coverage.
  • An understanding of fixed income concepts, including duration, convexity, spread, and option-adjusted spread (OAS).
  • Good oral and written communication skills
  • Strong critical thinking, problem-solving skills, business acumen, and familiarity with Agile development processes.

Preferred Skills

  • Graduate degree in a quantitative discipline (e.g., Computer Science, Mathematics, Statistics, or related field).
  • Strong understanding of GAAP accounting fundamentals, including revenue/expense recognition and amortization.
  • CFA/FRM (or significant progress toward CFA/FRM/CPA).
  • Strong oral and written communication skills, with the ability to clearly articulate technical and business concepts.
  • Experience engaging with stakeholders to gather requirements, align on priorities, and drive delivery.
  • Exposure to product and project management tools (e.g., JIRA) to support planning, tracking, and execution.

Shift: [] Start: [] EEO "Mindlance is an Equal Opportunity Employer and does not discriminate in employment on the basis of – Minority/Gender/Disability/Religion/LGBTQI/Age/Veterans."

Vacancy posted 4 days ago
Similar jobs that could be interesting for youBased on the Senior Python Developer in McLean, VA vacancy
  •  ...Python Developer Hybrid - Onsite in McLean Tuesday through Thursday. Must Haves: Full stack developer, emphasis on front end but back end database work is also present. Python w/ Pandas, React or Angular, SQL. Must have hands on experience in an Agile environment... 
    Senior

    Software Technology Inc

    McLean, VA
    4 days ago
  • Senior Fullstack Developer Mclean, VA (Hybrid On-Site) Position Overview: Are you interested in using your software engineering skills to build numerical systems that enable running computationally intensive financial models at scale? Financial Engineering is seeking a... 
    Senior

    Software Technology Inc

    Mc Lean, VA
    3 days ago
  • $131.3k - $237.35k

     ...customers. This role sits at the intersection of helping end users, developing new features, and coordinating with technical partners to...  ...Intelligence Polygraph clearance Four years of experience in a Python Development role Bachelor’s degree in computer science,... 
    Senior
    Local area
    Immediate start

    Leidos

    Falls Church, VA
    16 hours ago
  •  ...Job Summary: Senior Software Developer Financial Accounting Applications (Freddie Mac, McLean, VA) Key Responsibilities: - Refactor...  ...development experience with modern programming languages (Python, Java, or C#). - 1 2 years experience with Git version... 
    Senior

    Expert Technology Services

    McLean, VA
    2 days ago
  • Job Description: Must Haves: Python, SQL, Groovy, PostgreSQL, Jenkins, Docker Kubernetes, CI/CD, Bitbucket, Gitlab, Oracle, AWS cloud...  ...and operational capabilities. • Solid experience as Python Developer Experience with Python frameworks e.g., Django, Flask. • Good experience... 
    Senior
    Work experience placement

    Navtech

    Mc Lean, VA
    3 days ago
  •  ...Job Description Job Description API/Java/Python Developer Hybrid – Arlington, VA U.S. Citizenship and TS/SCI and CI poly required...  ...minimum 5 years of experience for mid-level and 8+ years for senior •                 Security Clearance: TS/SCI with CI Poly... 
    Senior
    Remote work

    @Orchard

    Arlington, VA
    2 days ago
  •  ...employees of the sub vendor. Must Have Qualifications: Strong Python Developer with strong experience in Python development, SQL, and...  ...all interview rounds are completed. Job Description: Senior Python Developer Required Experience & Education 7 10 years... 
    Senior
    Flexible hours

    Zuven technologies Inc

    McLean, VA
    2 days ago
  •  ...Python Developer Duration: 6-12 Months (Possible Extension or Conversion) Location: McLean, VA (Hybrid) Job Description: This team does integration with third party tools like other SaaS/COTS Products Need someone who can do Data Analysis and Data Mapping... 
    Senior

    Samprasoft

    McLean, VA
    16 hours ago
  •  ...Python Developer Location: Must be onsite in McLean, VA. Hybrid - 3+ days per week. Extension/Conversion: This is a contract position, currently fully funded through EOY. No plans for extension or conversion at this time. Must Haves: 3+ years of Python, Pandas,... 
    Senior
    Contract work
    Shift work
    3 days per week

    Software Technology Inc

    McLean, VA
    4 days ago
  • SENIOR PYTHON DEVELOPER 4 DAYS ONSITE Washington, DC MUST BE LOCAL 5- Months Contract SENIOR PYTHON DEVELOPER Python, reporting- part of the Enterprise Data Management team supporting treasury data Want someone really good at python and sql and ok at power bi- just... 
    Senior
    Contract work
    Local area

    3B Staffing LLC

    Washington DC
    3 days ago
  •  ...Job Title: Senior Python AWS developer Location: Reston, VA (Onsite In-person interview) Experience: 10+ years Candidate Preference: Local to DMV area Work Type: 100% hands-on technical role Job Description We are seeking a Senior Python... 
    Senior
    Local area

    Interon IT Solutions

    Reston, VA
    1 day ago
  • Senior Python DeveloperLinkedIn must be strong and candidate must be in EST, CST or Mountain time zone.I want to keep the rate open to attract...  ....Previous Java experience in their career or as former Java developers.They need to have been in Python, typically for 5 plus years,... 
    Senior
    Remote work

    Anveta, Inc

    Washington DC
    3 days ago
  •  ...duration of the assignment period. Must Haves 8+ hands on experience Python and Java (preferred) 8 years of hands on experience in J2EE and...  ...and databases Required Skills: Python, Java. Additional Skills: Software Developer. This is a high priority requisition. Samprasoft
    Senior

    Samprasoft

    Mc Lean, VA
    3 days ago
  •  ...Job Description Job Description We are looking for a Senior Python Developer to join our software development team. Senior Python Developer responsibilities include participating in the entire software development lifecycle, debugging applications and configuring... 
    Senior
    Work experience placement

    Maxiom Technology

    Washington DC
    23 days ago
  •  ...What we would like to see: In a senior developer role, you will design and build data flow and data integration processes to enhance loss...  ...firm. Drawing from your vast hands-on experience in Python (PySpark), Spark, REST, Java, and Scala, you will develop, test... 
    Senior
    Contract work

    Mavens Guild

    McLean, VA
    17 days ago
  • Python Developer Client is building a culture based on modern software delivery practices to support the secondary mortgage market through rapid technology and best practice innovation. Position Overview: Financial Engineering team is seeking Python Developers for a large... 
    Senior
    Contract work

    Suncap Technology

    Mc Lean, VA
    3 days ago
  • Python Developer Candidate must be authorized to work without sponsorship Must Haves: Python, Rest API (Flask or Fast API), Pandas or NumPy, Pytest or Unitest. Focus here is on test automation. The position is focused on python development of components for a software... 
    Senior

    Samprasoft

    Mc Lean, VA
    3 days ago
  • $229.9k - $262.4k

    Capital One National Association is seeking a Senior Lead Data Engineer in McLean, Virginia. This role involves pioneering data-driven tools, leading Agile teams, and leveraging technologies like AWS and AI for Risk management. The ideal candidate will possess strong programming... 
    Senior

    Capital One National Association

    Mc Lean, VA
    5 days ago
  • Capital One is looking for a Senior Lead Data Engineer in McLean, VA to spearhead data projects using Python, AWS, and Snowflake. You will collaborate with Agile teams to create innovative solutions that address real business challenges and enhance customer experiences.... 
    Senior

    Capital One

    Mc Lean, VA
    5 days ago
  • $150k - $170k

     ...new systems and tools, take on greater responsibility, and help develop the firm's capabilities, tools, and lines of business. We move...  ...development experience Bachelor's degree Expert-level command of Python Strong hands-on experience with cloud-native development on... 
    Senior
    Full time
    Temporary work
    Live in
    Work at office
    Immediate start
    Shift work

    OpenDataJobs

    Washington DC
    1 day ago
  •  ...working, with you setting the pattern for tools such as Amazon Q Developer. Developers who improve through working alongside you....  ...development experience Bachelor's degree Expert-level command of Python Strong hands-on experience with cloud-native development on... 
    Senior
    Temporary work
    Work at office
    Immediate start
    Shift work

    OpenDataJobs

    Washington DC
    2 days ago
  • $229.9k - $262.4k

     ...Senior Lead Software Engineer, Fullstack (Typescript/Nodejs/Python) Do you love building and pioneering in the technology space? Do you enjoy solving complex business...  ...of diverse technology projects and a team of developers with deep experience in distributed... 
    Senior
    Full time
    Part time
    Internship
    Local area

    Capital One

    McLean, VA
    3 days ago
  • A tech services firm is seeking a Mid-Senior Level Python Developer for full stack application development onsite in McLean, VA. Ideal candidates will have a Bachelor's degree in a related field and at least 5 years of extensive experience in Data technologies including... 
    Senior

    Zillion Technologies

    Mc Lean, VA
    1 day ago
  • Capital One is seeking a Lead Data Engineer to drive data solutions across cloud and on‑prem environments. You will work with Python, Spark, and AWS to design and implement scalable data pipelines and ML workflows. You’ll mentor teammates, review code, and help shape architecture... 
    Senior

    Capital One

    Mc Lean, VA
    4 days ago
  • $229.9k - $262.4k

     ...Senior Lead Software Engineer, Distributed Systems (Golang + Python on Kubernetes) Do you love building and pioneering in the technology space? Do you enjoy solving...  ...of diverse technology projects and a team of developers with deep experience in distributed... 
    Senior
    Full time
    Part time
    Internship
    Local area

    Capital One

    McLean, VA
    3 days ago
  •  ...be notified as funding and hiring timelines are confirmed. We encourage interested applicants to apply. We are seeking a Senior Python Developer (Lead) to support a federal client in the Washington, DC area on a major application modernization initiative. This role... 
    Senior
    Full time
    For contractors
    Local area
    Remote work

    Otoe Missouria Group

    Washington DC
    23 days ago
  • $89.6k - $194k

    Python Developer, Senior TS/SCI with Poly REQUIRED Position Description CGI Federal has an exciting opportunity for an Python Developer within our Intel sector advancing the national security mission through cutting edge technology.  You must have a passion for... 
    Senior
    Work at office
    Local area
    Arlington, VA
    a month ago
  • $130k - $196k

     ...into the demanding fields of data science and machine learning? Are you proficient in Python, and full life cycle software development?Freddie Mac is currently seeking a senior developer to join the Credit Innovation and Analytics team in the Single-Family division.This... 
    Senior
    Local area

    Freddie Mac

    McLean, VA
    2 days ago
  • $170k - $210k

     ...Secret level with the ability to obtain and maintain a TS/SCI with CI Poly.Vantor has an exciting opportunity for an API/Java/Python Developer within our Intel sector advancing the national security mission through cutting edge technology. You must have a passion for keeping... 
    Senior
    Full time

    Maxar Technologies

    Arlington, VA
    8 hours ago
  • $158.6k - $181k

    Senior Data Engineer (Python, SQL, AWS) - Dealer Tech Do you love building and pioneering in the technology space? Do you enjoy solving complex...  ...loan origination platform, the division is also focused on developing innovative dealership services that enhance both the... 
    Senior
    Full time
    Part time
    Internship
    H1b
    Local area

    Capital One National Association

    Mc Lean, VA
    2 days ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Senior Python Developer. Be the first to apply!