Senior Python Backend Engineer

@Microlent

I read your brief for a senior Python engineer to handle RESTful APIs and microservices. I understand you need someone who can take full ownership of the backend system without needing hand-holding or constant checks. I have been building production-grade systems for years and focus heavily on asynchronous processing and query optimization to keep things fast under load. My approach involves setting up clean system designs and solid CI/CD pipelines from the start. I make sure everything is well-documented and easy to maintain by using clear type hints and thorough error logging. I am comfortable working solo on system design and performance tuning to stay within your budget while delivering high-quality code. Here is a similar engine I built: https://www.freelancer.com/portfolio-items/11337466-python-deterministic-scoring-engine Let's kick off with a small milestone for end-to-end backend service delivery. You only release payment when you are happy with the work. ~ Rajesh

@amgadmourad18

Hello ,I hope this message finds you well. I will be able to help you with your project. I read through the description and it sounds like I am just the right person for it. I have the right skill set with sophisticated experience in Full Stack Web Programming using Django & PHP and data science techniques which can be helpful in data science web based projects. As a next step I would like to discuss some further questions with you over the chat or a call. Further, I am in the preferred Freelancer program, making me part of the top 3% on the platform. Many successful past projects can be seen on my profile page. Thanks in advance

@SmartCodeDev

Hello, I am an experienced Python Backend Engineer with strong hands-on expertise in FastAPI, Django, Flask, REST APIs, microservices, async processing, and scalable backend architecture. I have worked with PostgreSQL, MySQL, MongoDB, Docker, CI/CD pipelines, cloud platforms, and queue systems such as Celery and RabbitMQ for production-grade applications. I am comfortable handling API development, performance optimization, background jobs, monitoring, and cross-team collaboration in fast-paced environments. I also have experience with OpenAI and AI integrations, data processing workflows, and scalable system design. I am available for remote contract work and can start immediately with strong ownership and reliable communication.

@KarthikTechCon

Hi, I’m Karthik with 15+ years of experience in Python backend development, scalable API architecture, cloud systems, and enterprise application engineering. I have strong hands-on experience building production-grade backend systems using FastAPI, Django, Flask, PostgreSQL, MongoDB, Docker, and cloud-native deployment workflows. My expertise includes: • REST API & microservices development • FastAPI / Django / Flask backend systems • Async processing with Celery, RabbitMQ, Kafka • PostgreSQL, MySQL, MongoDB optimization • Docker, CI/CD, AWS/GCP/Azure deployments • Logging, monitoring, scaling & performance tuning • ETL/data-processing workflows and AI integrations I’ve worked on: ✔ Fintech & transactional systems ✔ AI/LLM-integrated applications ✔ Workflow automation platforms ✔ Real-time dashboards & reporting systems ✔ Secure enterprise backend architectures Strengths: ✔ Strong debugging & system-design skills ✔ Independent ownership & fast execution ✔ Production-focused scalable architecture ✔ Clean, maintainable Python code Tech stack: Python, FastAPI, Django, Flask, PostgreSQL, Redis, Celery, Kafka, Docker, Kubernetes, AWS, OpenAI/LangChain. Available for remote freelance/contract engagement and can start immediately. Regards, Karthik

@caroldata

As an ISO 9001:2008 Certified IT Service Provider with over a decade of experience, my team at Carol Data Technology brings unmatched expertise to the table. We've long been involved in software development, and our skills cover a wide range, from Web and Mobile App development to Testing, Project Management, and more. This breadth is precisely what makes us well-suited to build robust backend systems for your applications. Drawing on my 4-8 years of experience as a Python Backend Engineer with strong API development and system design skills, I'm confident in our ability to deliver the high-quality solutions you seek. We're well-acquainted with FastAPI, Django, Flask, and work fluently with SQL and NoSQL databases - PostgreSQL, MySQL, MongoDB. Together, we can ensure efficient asynchronous programming through implementating Celery, RabbitMQ, Kafka and other logs and monitoring tools. Additionally we are versed in Cloud Platforms like AWS, GCP And have hands-on experience with Docker and CI/CD pipelines. While Good-To-Have skills LLM/AI integrations using OpenAI etc., are what we are proud to say: we have experience of large-scale data processing or ETL pipelines. Also IReadiness to go extra mile to ensure smooth delivery. What makes us truly unique is our commitment to ensuring 100% satisfaction for our clients. Thus no PF benefits associated with this freelance role does not deter me from looking forward to collaborating with you on this project!

@mahads31

As a Senior Python Backend Engineer with over eight years of experience, I am confident that I have the skills and expertise your project requires. My proficiency in API development, system design, and working with scalable, high-performance applications aligns perfectly with your needs. I have a proven track record for designing, developing, and maintaining robust backend services using Python, as well as building RESTful APIs and microservices like FastAPI, Django, and Flask. My understanding of asynchronous programming using Celery, RabbitMQ, Kafka, combined with my strong SQL skills and experience in working with databases like PostgreSQL and MongoDB further enhance my suitability for this role. Having worked on varied projects including automation workflow, cloud infrastructure deployment and large-scale data processing or ETL pipelines, I bring a well-rounded perspective to any task. I am well-versed in cloud platforms such as AWS/GCP/Azure and have hands-on experience with Docker and CI/CD pipelines.

@techstar12

Hi there! I’ve worked on backend systems handling scalable APIs, async processing, and AI integrations for production applications, and your requirements align very closely with my experience. I have 6+ years of experience building backend systems using Python, FastAPI, Django, and Flask. Recently, I developed microservice based applications with async pipelines using RabbitMQ and Celery, optimized PostgreSQL queries to reduce response times, and improved deployment reliability using Docker, Kubernetes, and AWS. My experience includes: Building scalable REST APIs and microservices Async processing with RabbitMQ and background workers FastAPI and Django based backend architectures PostgreSQL, MySQL, MongoDB, and Redis optimization Dockerized deployments with CI CD pipelines LLM integrations using LangChain, OpenAI, and RAG pipelines Production grade monitoring, logging, and performance tuning I’ve also worked on AI powered systems processing large scale data and multimodal workflows, which matches your preferred experience around LLM integrations and scalable systems. I’m comfortable working independently, taking ownership, and collaborating with frontend and DevOps teams in fast paced environments. I can share my updated resume and relevant project examples right away. Is there any specific backend challenge or architecture you’d like me to review first?

@sant527

I am interested in this work. I work mainly in python and have good experience in Django/flask + JS If you are interested please ping me. We can dicsuss more details on this

@letscms

Hello, I am an individual full-stack developer from India with 14+ years of experience in backend and scalable web application development. I have strong hands-on experience with Python, FastAPI, Flask, Django, REST APIs, microservices, PostgreSQL, MySQL, MongoDB, Docker, and cloud-based deployments. =>Experience building scalable backend systems and high-performance APIs =>Strong knowledge of async processing, Celery, queues, and background jobs =>Comfortable with AWS/GCP, CI/CD pipelines, and production deployments =>Experience with OpenAI/LLM integrations and API-based architectures =>Strong debugging, optimization, and system design skills =>Able to work independently in fast-paced environments I am interested in this freelance opportunity and available to start immediately. Best regards, Jitendra Sharma

@MWaqar5246

Hello, I am a Python Backend Engineer with strong experience in building scalable APIs, backend systems, and production-grade applications using FastAPI, Django, and Flask. I’ve worked on RESTful APIs, database optimization, and system design for high-performance web applications. Relevant experience: Backend API development using FastAPI/Django Building scalable REST APIs and microservices Working with PostgreSQL and MySQL databases Asynchronous processing with Celery and background tasks Docker-based deployments and CI/CD pipelines Performance tuning, logging, and error handling systems What I can bring to your team: Clean, scalable backend architecture Well-structured and maintainable APIs Focus on performance, reliability, and security Strong debugging and problem-solving ability Collaboration with frontend and DevOps teams Tools & Technologies: Python, FastAPI, Django, Flask, PostgreSQL, MySQL, MongoDB, Celery, RabbitMQ, Docker, AWS I am comfortable working in fast-paced environments and taking full ownership of backend modules from design to deployment. I have attached my resume (available on request or can be shared directly here as needed). Best regards, M Waqar Tariq

@gauravl3

As someone with an extensive background in developing scalable, high-performance backend systems using Python, I believe I am the perfect fit for your Senior Python Backend Engineer role. With over 8 years of experience building RESTful APIs and microservices on platforms like FastAPI, Django, and Flask combined with my knowledge of asynchronous programming and databases (SQL/NoSQL), I feel confident in my ability to design, develop, and optimize backend services that align with your needs. Additionally, I have a strong grasp on system design as well as scalability and performance optimization - key factors in any successful backend system. I'm also comfortable working with cloud platforms (AWS/GCP/Azure), Docker, and CI/CD pipelines. Furthermore, my proficiency in integrating AI technologies (including LLMs) can be a great asset to your project. What sets me apart is my commitment to delivering quality work while adhering to strict timelines. My Problem-solving skills combined with my ability to operate independently allow me to tackle complex issues effectively while taking full ownership of the project. Operating at your required level of ₹50,000 – ₹80,000/month compensation, I promise not just technical excellence but also a collaborative spirit - a willingness to work closely with cross-functional teams in delivering high-quality solutions.

@Srashtasoft

Hi there, I have read your project requirement. We have strong experience in Python backend development, FastAPI/Django, REST APIs, microservices, AWS deployment, asynchronous processing, and scalable system architecture. Our team has worked on: • FastAPI and Django backend systems • Microservices and API development • PostgreSQL, MongoDB, Redis, Celery, RabbitMQ • Docker, CI/CD, and AWS deployment • OpenAI/LLM integrations and data processing pipelines We are comfortable with remote contract collaboration and can work independently in fast-paced environments. A few questions: ============== Is this role focused more on FastAPI or Django? What is the expected overlap time with your team? Are the projects primarily AI/document-processing related? Will there be DevOps responsibilities as well? Best Regards, Srashtasoft Team

@pinkeegupta

Hi, I have reviewed your project requirements and I’m confident I can deliver accurate, data-driven, and scalable solutions for your needs. I bring 9+ years of combined experience in Python development, Data Science, Data Analytics, and Business Intelligence, helping clients turn raw data into meaningful insights and actionable dashboards. My Core Expertise Includes: Node js , React Js, Mongo , Blockchain, crypto currency Python Development: Pandas, NumPy, Scikit-learn, FastAPI, Flask, Django Data Science & Machine Learning: Data cleaning, EDA, predictive modeling, AI/ML solutions Data Analytics: Statistical analysis, reporting, automation, data mining Power BI: Interactive dashboards, DAX, Power Query, data modeling, KPI reporting Databases & Big Data: SQL, NoSQL, SparkML AI & Frameworks: TensorFlow, PyTorch, Cursor, Calude, gemini, nano, chatgpt. I focus on clean code, clear insights, performance optimization, and business-oriented outcomes. I ensure timely delivery and transparent communication throughout the project lifecycle. Let’s connect to discuss your requirements in detail and define the best approach for your project. Looking forward to working with you. Regards, Anju Logical Soft Tech Pvt Ltd, Indore(M.P)

@MZITSERVICES

Hi there, I am A.R.M. MASUD, with a strong Data Science background. As a Python developer, I have extensive experience building robust, scalable, and efficient solutions that address various business needs. I understand the importance of delivering high-quality, well-architected code, and I am committed to working closely with you to ensure the success of this project. I implement core functionality using Python, utilizing relevant libraries and frameworks such as Pandas, NumPy, GUI, SciPy, Matplotlib, Seaborn, Plotly, Scikit-learn, TensorFlow, Keras, PyTorch, spaCy, Flask, Django, FastAPI, OpenCV, and Jupyter. I am a professional responsible for extracting actionable insights and knowledge from large volumes of data through Machine Learning models, including CNNs, RNNs, LSTMs, GANs, Transformers, FNNs, ANNs, and DNNs. I conduct comprehensive unit, integration, and performance testing to ensure the solution is error-free and optimized. https://www.freelancer.com/u/MZITSERVICES I appreciate the opportunity to submit this proposal and am excited about the possibility of working with you to bring your project to life. Thanks A.R.M MASUD

@nsinfosoftwebapp

Hello, Full Stack Web Developer with 8+ years of experience in Python, Laravel, CodeIgniter, Core PHP, Node JS, React JS, MySQL, API Integration, and Web Application Development. I have successfully developed and maintained: - E-commerce Websites - Custom Admin Panels - Inventory Management Systems - Booking Systems - CRM/ERP Solutions - API Integrations - Responsive Websites I can complete your project with: - Clean and scalable code - Mobile responsive design - Fast performance optimization - Secure development standards - Proper testing and support Why choose me? - 8+ years experience - Quick communication - On-time delivery - Long-term support - Professional development approach I am available to start immediately and would be happy to discuss your project requirements in detail. Looking forward to working with you.

@MuhammadAsad108

✔ I deliver 100% work — 99.9% is not for me. ✔ Workflow Diagram Requirement Analysis ⟶⟶ HRMS & Payroll Architecture ⟶⟶ Employee & Attendance Modules ⟶⟶ Payroll Automation ⟶⟶ API Integration ⟶⟶ Security & Audit Logs ⟶⟶ QA Testing ⟶⟶ Production Deployment Key Highlights ✔ Complete HRMS + Payroll platform — employee records, attendance, payroll & reporting in one system. ✔ Responsive web application — smooth desktop & mobile experience. ✔ Employee management — add/edit/archive employees with role-based permissions. ✔ Attendance tracking — biometric/CSV import, leave rules & overtime automation. ✔ Payroll engine — tax setup, deductions, multi-cycle payroll & PDF payslips. ✔ API integrations — secure field mapping with existing HR systems. ✔ Security-focused architecture — audit logs, encrypted sensitive data & access control. ✔ Admin dashboard — manage staff, payroll cycles, attendance & analytics easily. ✔ Production-ready delivery — full source code, DB schema & deployment documentation. Best Regards, Asad Full Stack HRMS Developer | Payroll System Expert | API Integration Specialist

@guguap900

Hi, I am experienced python developer who primarily working on FastAPI/Flask and OpenAI RealtimeAPI/LangChain/OpenClaw/PostgreSQL/AWS/Azure. I will be best suite for you project and interested to start the work on it. Thanks.

@jaroslavcaprata

Hello, my name is ⭐⭐Jaroslav⭐⭐ and I am a senior Python backend engineer with strong experience building scalable APIs, microservices, and production-grade backend systems using FastAPI, Django, and Flask. I have worked on high-performance applications involving PostgreSQL, MongoDB, async processing, background jobs, and cloud-based deployments with Docker and CI/CD pipelines. My experience includes designing REST APIs, optimizing database queries, implementing queue-based workflows with Celery and RabbitMQ, and maintaining stable systems under real-world load. I am also comfortable with AWS environments, monitoring, logging, and scalable service architecture. In addition, I have worked on AI-integrated backend systems using OpenAI and LangChain for automation and intelligent workflows. My approach focuses on clean architecture, maintainable code, and reliable performance while collaborating closely with frontend and DevOps teams. I am confident I can contribute effectively to your backend systems and take ownership of feature delivery, optimization, and long-term stability. I look forward to discussing how I can support your team.

@sonika1419

**DO NOT PAY ME UNTIL I COMPLETE! :)** Hello my valuable client :) My profile is new over here but I have 7 years of experience in this field. I have completely understood about your project. Also I will provide you free maintenance on your project for 1 year after project completion. I can definitely complete this in your timeframe. Give me one chance to prove myself. Hit the chat button to get started. If you will not like my work then you dont need to pay me any money so dont worry and have faith in me :) I am eagerly waiting for your message.