Full Stack Python JavaScript Developer

Requirements:

• Approximately 3+ years of professional software development experience, including substantial recent hands-on Python development; the posting also seeks candidates with 4–10 years of experience and specifies no more than 10 years.
• Strong Python skills, object-oriented design, application architecture, package and module design, and software engineering fundamentals.
• Experience developing and supporting production-grade Python applications and services, including work in large, existing codebases.
• Hands-on experience building web applications and user interface components connected to backend services.
• Strong API and system integration experience, including REST APIs and enterprise data interfaces.
• Strong SQL, database integration, and data-processing skills, including Pandas or equivalent libraries.
• Experience with automated testing, preferably pytest, including mocking and integration testing.
• Experience with Git, CI/CD, Linux and/or Windows server environments, and production release processes.
• Ability to troubleshoot application, data, integration, performance, and scheduled-job failures.
• Clear communication skills and ability to collaborate with business users, Quants, support and infrastructure teams, and application owners.
• Bachelors degree.
• Preferred: experience with Streamlit, Quart, FastAPI, or Flask; React, JavaScript or TypeScript, HTML, and CSS; PostgreSQL, SQL Server, QuestDB, Xenomorph TimeScape, or other time-series platforms; Bloomberg, Refinitiv, Murex, or comparable systems; Tidal, Kafka, or ActiveMQ; GitLab CI/CD, containerization, automated deployment, or observability tools; and financial-services or capital-markets technology, ideally Equity Derivatives, structured products, QIS, or market data.
• The posting states a Corp-to-Corp rate of $77/hour for H-1B candidates and a W-2 rate of $64/hour for U.S. citizens or Green Card holders.

Responsibilities:

• Design, develop, enhance, and maintain production-quality Python applications and services, creating modular, reusable, testable components and improving established codebases.
• Refactor and modernize legacy scripts and applications to improve maintainability, scalability, performance, and operational resilience.
• Participate in technical design, code reviews, automated testing, releases, and production troubleshooting.
• Build and maintain web UI components and interactive workflows for visualization, process initiation, monitoring, exception management, and user actions.
• Connect web interfaces with Python services, APIs, databases, and application workflows, applying sound practices for usability, validation, security, maintainability, and performance.
• Develop integrations with internal applications and third-party providers using APIs, databases, file feeds, and messaging or event-driven interfaces.
• Implement data validation, normalization, transformation, reconciliation, caching, retries, timeouts, idempotency, and error handling; collaborate with interface owners to resolve data-quality issues and manage changes.
• Develop data-access and transformation components using SQL, Python, Pandas, and appropriate database libraries, and support batch and scheduled processing.
• Diagnose failed jobs, stale or missing data, reconciliation breaks, and upstream or downstream processing issues.
• Support business-critical production applications and improve logging, monitoring, observability, alerting, performance, exception handling, and resiliency.
• Build unit, integration, API, UI, and regression tests and support reliable automated deployments.
• Contribute to Git-based development, CI/CD, release and configuration management, and environment promotion.
• Prepare technical documentation, runbooks, interface specifications, and support procedures.

Technologies:

• API
• ActiveMQ
• Backend
• CI/CD
• CSS
• FastAPI
• Flask
• Git
• GitLab
• Support
• JavaScript
• Kafka
• Linux
• PostgreSQL
• Python
• REST
• React
• SQL
• Security
• TypeScript
• Web
• Windows
• pandas
• pytest
• UX UI Design
• GraphQL
• Java
• Fullstack

More

We are seeking a Python / Full-Stack Developer for our Equity Derivatives Technology team, supporting Stark, an internal platform for our Quantitative Investment Strategies business. This hands-on engineering role spans web UI, Python services, data processing, databases, integrations, deployment, and production support. The work centers on established business and quantitative logic; it does not involve developing pricing models, conducting quantitative research, or defining core QIS calculation methodologies. The role is based in New York, NY, for a six-month term, with five days per week in the office. The posting describes the level as mid-level and notes that capital-markets experience is beneficial, while engineering ability is the primary focus.

last updated 43 week of 2026