

OSI Engineering
Python Backend Engineer
⭐ - Featured Role | Apply direct with Data Freelance Hub
This role is for a Python Backend Engineer on a 6-12+ month contract, offering $65-$78/h. Required skills include 6+ years in web services, proficiency in modern Python frameworks, relational databases, and collaboration with cross-disciplinary teams. Remote or Cupertino, CA.
🌎 - Country
United States
💱 - Currency
$ USD
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💰 - Day rate
624
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🗓️ - Date
October 11, 2025
🕒 - Duration
More than 6 months
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🏝️ - Location
Remote
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📄 - Contract
Unknown
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🔒 - Security
Unknown
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📍 - Location detailed
Cupertino, CA
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🧠 - Skills detailed
#Debugging #HTML (Hypertext Markup Language) #AWS (Amazon Web Services) #SQLAlchemy #JSON (JavaScript Object Notation) #Data Engineering #DevOps #Docker #Kubernetes #pydantic #Data Warehouse #Python #FastAPI #Scala #Swagger #React #SQL (Structured Query Language) #REST (Representational State Transfer) #"ETL (Extract #Transform #Load)" #Flask #Web Services #TypeScript #Databases #GIT #JavaScript #Pytest
Role description
We are seeking a highly skilled Backend Python Software Engineer. The ideal candidate will have extensive experience designing and developing web service applications, strong knowledge of modern Python frameworks, and expertise with relational databases. This role requires excellent problem-solving skills, the ability to work collaboratively with cross-disciplinary teams, and a passion for building scalable, reliable backend systems.
Key Responsibilities:
• Estimate, plan, and implement software development work.
• Collaborate with product managers to gather requirements and build or improve modules.
• Maintain and enhance the existing codebase, applying software engineering best practices.
• Troubleshoot and research reported issues, recommending solutions by evaluating trade-offs.
• Stay current with new technologies and adopt relevant ones for the team.
• Participate in peer reviews and contribute to continuous improvement.
• Deliver on assigned project objectives and timelines.
• Help set engineering direction for current and future applications.
Qualifications:
• 6+ years of experience designing and developing web service applications.
• Strong experience with web services/APIs (REST, JSON, OpenAPI/Swagger).
• Proficiency with modern Python and frameworks (FastAPI/Flask, SQLAlchemy Core, Pydantic, Httpx, Alembic, Pytest, Ruff, Pyright, or similar).
• Strong experience with relational databases, SQL query optimization (Postgres).
• Strong experience with Git, bug tracking, and collaborative software development.
• Excellent debugging, diagnostic, communication, and problem-solving skills.
• Ability to work in a cross-disciplinary team with PMs, designers, and developers.
Preferred Skills:
• Experience with containerization and DevOps (Docker, Kubernetes, AWS, CI/CD).
• Basic knowledge of Data Engineering (ETL, Data warehouses).
• Exposure to frontend technologies (Vue/React, JavaScript/TypeScript, HTML/CSS).
• Strong organizational and multitasking abilities.
• Self-directed, analytical, and eager to learn and improve.
Type: Contract
Duration: 6-12+ Months
Location: Cupertino, CA or Remote (PST)
Pay Rate: $65-$78/h (DOE)
We are seeking a highly skilled Backend Python Software Engineer. The ideal candidate will have extensive experience designing and developing web service applications, strong knowledge of modern Python frameworks, and expertise with relational databases. This role requires excellent problem-solving skills, the ability to work collaboratively with cross-disciplinary teams, and a passion for building scalable, reliable backend systems.
Key Responsibilities:
• Estimate, plan, and implement software development work.
• Collaborate with product managers to gather requirements and build or improve modules.
• Maintain and enhance the existing codebase, applying software engineering best practices.
• Troubleshoot and research reported issues, recommending solutions by evaluating trade-offs.
• Stay current with new technologies and adopt relevant ones for the team.
• Participate in peer reviews and contribute to continuous improvement.
• Deliver on assigned project objectives and timelines.
• Help set engineering direction for current and future applications.
Qualifications:
• 6+ years of experience designing and developing web service applications.
• Strong experience with web services/APIs (REST, JSON, OpenAPI/Swagger).
• Proficiency with modern Python and frameworks (FastAPI/Flask, SQLAlchemy Core, Pydantic, Httpx, Alembic, Pytest, Ruff, Pyright, or similar).
• Strong experience with relational databases, SQL query optimization (Postgres).
• Strong experience with Git, bug tracking, and collaborative software development.
• Excellent debugging, diagnostic, communication, and problem-solving skills.
• Ability to work in a cross-disciplinary team with PMs, designers, and developers.
Preferred Skills:
• Experience with containerization and DevOps (Docker, Kubernetes, AWS, CI/CD).
• Basic knowledge of Data Engineering (ETL, Data warehouses).
• Exposure to frontend technologies (Vue/React, JavaScript/TypeScript, HTML/CSS).
• Strong organizational and multitasking abilities.
• Self-directed, analytical, and eager to learn and improve.
Type: Contract
Duration: 6-12+ Months
Location: Cupertino, CA or Remote (PST)
Pay Rate: $65-$78/h (DOE)