Backend .NET Developer

ReturnPro • Miami, FL

51d • Remote

About The Position

Join ReturnPro as a Backend .NET Developer—Where Innovation Meets Impact!
Are you a developer who dreams of .NET, lives for solving complex puzzles, and loves creating technology that genuinely makes a difference? At ReturnPro, we are not just building software, we are transforming the entire returns industry by helping companies recover value, reduce waste, and simplify returns across leading platforms like eBay, Amazon, Walmart Marketplace, and beyond. We are seeking an enthusiastic Backend .NET Developer who is ready to bring fresh ideas, creativity, and even a sprinkle of AI magic to our talented team.

Requirements

• Have strong hands-on experience in .NET and C# development.
• Love creating clean, robust, and maintainable code.
• Are passionate about RESTful APIs, microservices, and modern web architectures.
• Have a strong grasp of relational databases like MSSQL or PostgreSQL.
• Enjoy working collaboratively, communicating clearly, and solving problems effectively.
• Communicate confidently in English (Upper-intermediate or above).
• Python Expertise – 3-5 years of experience with Python for data handling, API interactions, and automation
• Database Querying – Strong SQL & NoSQL skills for retrieving and structuring large datasets
• OpenAI API & LLM Experience – Experience or strong interest in working with OpenAI’s API (GPT models) and prompt engineering
• AI Prompt Optimization – Understanding of how to structure AI prompts for clarity, accuracy, and efficiency
• API Integration & Automation – Experience in RESTful API interactions and processing structured responses
• Data Processing & Transformation – Proficiency in pandas, numpy for cleaning and preparing data before AI inference
• Scalability & Performance Optimization – Familiarity with asynchronous programming, parallel processing, caching
• Version Control & CI/CD – Hands-on experience with Git, Docker, CI/CD pipelines

Nice To Haves

• Experience with Docker, Kubernetes, and Azure Cloud technologies.
• Familiarity with NoSQL databases (e.g., MongoDB).
• Knowledge of OpenAPI (Swagger).
• Experience writing comprehensive unit and integration tests.
• Interest or experience in leveraging AI tools to optimize your coding workflow, such as AI-assisted coding, automated code reviews, or generative AI tools.
• Proficiency in languages such as Russian, Romanian, or Spanish (any of these would be a fantastic plus!).
• Experience fine-tuning OpenAI models or custom LLM deployment
• Hands-on experience with big data tools (e.g., Snowflake, BigQuery, Databricks)
• Familiarity with asynchronous processing (asyncio, Celery) for high-volume API calls
• Experience in pricing automation & AI-powered decision-making

Responsibilities

• Build and enhance our industry-leading Returns Management SaaS Platform.
• Collaborate with passionate teams to turn challenging requirements into exceptional solutions.
• Continuously innovate to ensure our platform stays fast, scalable, and reliable.
• Dive deep into business processes, developing technological solutions that delight our clients.

Benefits

• Join an ambitious, innovative team committed to sustainability and producing meaningful software.
• Enjoy a collaborative and supportive remote work environment.
• Leverage the latest technology and AI-driven solutions in your everyday work.

What This Job Offers

• Job Type: Full-time
• Career Level: Entry Level
• Education Level: No Education Listed