Full-Stack Python Engineer – Web UI, APIs & Data (Finance)

SANS Consulting Services, Inc.; New York (NY); On-site; USD 73,000 - 104,000; Full time

Job summary

SANS Consulting Services, Inc. in New York, NY, seeks a Python / Full-Stack Developer for a 6-month, in-office role.

You will contribute to Stark Platform (Equity Derivatives) by building Python services, Web UI components, data integration, APIs, and production support, with 3+ years of hands-on Python experience. The role focuses on software engineering around established business logic, not on pricing models.

Qualifications

• Approximately 3+ years of professional software development experience, with substantial recent hands-on Python development.
• Strong Python, object-oriented design, application architecture, package/module design, and software engineering fundamentals.
• Proven experience developing and supporting production-grade Python applications and services.
• Hands-on experience building Web applications and Web UI components connected to backend services.
• Strong API and system-integration experience, including REST and enterprise data interfaces.
• Strong SQL, database integration, and data-processing experience; practical experience with Pandas or equivalent libraries.
• Experience maintaining and enhancing large, existing codebases, including debugging unfamiliar components.
• Strong automated testing experience, preferably with pytest, including effective mocking and integration testing.
• Experience with Git, CI/CD, Linux and/or Windows server environments, and production release processes.
• Demonstrated ability to troubleshoot application, data, integration, performance, and scheduled-job failures.
• Clear communication skills and the ability to work with business users, Quants, support teams, infrastructure teams, and application owners.

Responsibilities

• Design, develop, enhance, and maintain production-quality Python applications and services.
• Create modular, reusable, testable components and improve the structure of an established codebase.
• Refactor and modernize legacy scripts and applications to improve maintainability, scalability, performance, and operational resilience.
• Participate in technical design, code reviews, automated testing, release activities, and production troubleshooting.
• Design, build, and maintain Web UI components used by front-office, business, and technology users.
• Develop interactive workflows for data visualization, process initiation, operational monitoring, exception management, and user-driven actions.
• Integrate Web UI components with Python backend services, APIs, databases, and application workflows.
• Enhance Python-based web applications using frameworks such as Streamlit, Quart, FastAPI, or Flask, as applicable.
• Apply sound UI engineering practices for usability, validation, security, maintainability, and responsive performance.
• Design and develop integration components that retrieve source data from internal applications and third-party providers.
• Build and consume REST APIs, GraphQL APIs, database interfaces, file-based feeds, and messaging or event-driven interfaces.
• Implement data validation, normalization, transformation, reconciliation, caching, retry, timeout, idempotency, and error-handling controls.
• Integrate with market and reference data platforms such as Bloomberg, and enterprise systems such as Murex, where applicable.
• Work with upstream and downstream owners to define interface contracts, diagnose data-quality issues, and manage integration changes.
• Develop efficient data-access and transformation components using SQL, Python, Pandas, and appropriate database libraries.
• Work with relational and time-series data platforms such as PostgreSQL, SQL Server, QuestDB, or equivalent technologies.
• Support batch and scheduled processing, including dependency management, restartability, auditability, and operational controls.
• Diagnose failed jobs, stale or missing data, reconciliation breaks, and upstream/downstream processing issues.
• Provide development support for business-critical production applications.
• Improve logging, monitoring, observability, exception handling, alerting, performance, and resiliency.
• Build unit, integration, API, UI, and regression tests and support reliable automated deployments.
• Contribute to Git-based development, CI/CD, release management, configuration management, and environment promotion processes.
• Produce clear technical documentation, runbooks, interface specifications, and support procedures.

Skills

Python development

Full-Stack development

REST APIs

Git / CI/CD

SQL / PostgreSQL

Unit testing with pytest

Linux environments

Data integration

Tools

PostgreSQL

SQL Server

Python web frameworks (Flask, FastAPI, Streamlit)

Git

CI/CD pipelines

Job description

SANS Consulting Services, Inc. in New York, NY, seeks a Python / Full-Stack Developer for a 6-month, in-office role.

You will contribute to Stark Platform (Equity Derivatives) by building Python services, Web UI components, data integration, APIs, and production support, with 3+ years of hands-on Python experience. The role focuses on software engineering around established business logic, not on pricing models.