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backend developer python fastapi

97 Solutions

About the RoleWe are looking for an experienced Backend Developer (Python) with a strong background in FastAPI, SQLAlchemy, Alembic, Celery, and Docker. The project is a scalable backend system with modular APIs for users, organizations, dashboards, data connectors, and goal tracking.You&rsquo;ll be working on designing, optimizing, and scaling backend services that are already containerized with Docker and managed with Poetry for dependency control.---ResponsibilitiesDevelop and maintain backend APIs using FastAPIWork with SQLAlchemy ORM &amp; Alembic for schema design and migrationsIntegrate Celery for background tasks and queuesManage deployments with Docker &amp; Docker ComposeImplement authentication, authorization, and security best practicesCollaborate with frontend developers for seamless integrationsWrite clean, testable, and scalable code with Pytest or similar testing toolsOptimize queries and API performance for scalability---RequirementsStrong hands-on experience with Python (3.x)Proven experience with FastAPI frameworkSQLAlchemy &amp; Alembic for ORM and migrationsExperience with Celery for background jobsProficient in PostgreSQL or MySQLDocker-based development workflowGit/GitHub collaboration (branches, pull requests, reviews)Good communication skills in English---Nice to HaveFamiliarity with AWS, DigitalOcean, or GCPCI/CD experience (GitHub Actions, GitLab CI)Knowledge of OAuth2 / JWT authentication flowsExperience working on SaaS or multi-tenant appsJob Type: Full-timeAbility to commute/relocate:<ul><li>Karachi Nazimabad: Reliably commute or planning to relocate before starting work (Preferred)</li></ul>Application Question(s):<ul><li>Do you have experience working with FastAPI? Please share a project example.</li><li>What database have you used with SQLAlchemy (PostgreSQL, MySQL, etc.)?</li><li>Have you implemented Celery for background tasks before?</li><li>How do you usually manage environment dependencies (Poetry, Pipenv, requirements.txt)?</li><li>Do you have experience with Docker deployments in production?</li><li>Have you ever worked on a SaaS or multi-tenant platform?</li><li>What is your expected salary?</li><li>Our office timings are 12pm to 9pm Mon - Fri, Office Location is Nazimabad, is that feasible for you?</li></ul>Language:<ul><li>English (Required)</li></ul>Work Location: In person

Backend Developer - Python FastAPI

Systems Limited

<div><h3 class="jobSectionHeader">Summery</h3>

Experienced full-stack developer with 8+ years specializing in React frontend and Python/FastAPI backend, skilled in building scalable APIs and AI-powered solutions. Strong expertise in Generative AI, LangChain, vector databases, cloud services, and leading engineering teams to deliver enterprise-grade applications.
<h3 class="jobSectionHeader">Responsibilities</h3>
<ul>
<li>Develop and maintain frontend applications using React with a focus on hooks, state management, and modular components.
</li>
<li>Design, build, and optimize backend APIs and microservices using Python and FastAPI.
</li>
<li>Integrate AI/ML models and LLM APIs into applications for enterprise-scale solutions.
</li>
<li>Implement and manage vector database solutions (Milvus, Pinecone, Weaviate) to support AI workflows.
</li>
<li>Ensure secure access and authentication using OAuth2, JWT, and other security best practices.
</li>
<li>Lead and mentor engineering teams, collaborating with clients to gather requirements and deliver technical solutions.
</li>
<li>Manage deployment workflows using AWS services (Lambda, API Gateway, S3, EC2, RDS) and containerization with Docker.
</li>
<li>Monitor and maintain MLOps pipelines, including model monitoring, retraining, and CI/CD for machine learning.
</li>
<li>Utilize infrastructure-as-code tools (Terraform/CDK) and observability tools (CloudWatch, Prometheus, Grafana) for production environments.
</li>
</ul><h3 class="jobSectionHeader">Requirements</h3>
<ul>
<li>8+ years of full-stack development experience with React and Python/FastAPI.
</li>
<li>Deep knowledge of the React ecosystem: hooks, state management, and modular components.
</li>
<li>Proven experience building production-grade APIs and microservices.
</li>
<li>Strong expertise in LangChain, Generative AI, RAG pipelines, and prompt engineering.
</li>
<li>Hands-on experience with vector databases like Milvus, Pinecone, and Weaviate.
</li>
<li>Proficiency in integrating AI/ML models and LLM APIs.
</li>
<li>Solid experience with SQL databases (PostgreSQL, MySQL) and NoSQL databases (MongoDB, DynamoDB, Redis).
</li>
<li>Familiarity with AWS cloud services (Lambda, API Gateway, S3, EC2, RDS).
</li>
<li>Experience with containerization technologies such as Docker.
</li>
<li>Understanding of security best practices including OAuth2 and JWT.
</li>
<li>Excellent communication and client-facing consulting skills.
</li>
<li>Demonstrated leadership and team guidance capabilities.
</li>
<li>Experience with MLOps workflows and CI/CD for machine learning projects.
</li>
<li>Familiarity with Kubernetes, Terraform/CDK, and observability tools like CloudWatch, Prometheus, and Grafana.
</li>
<li>Experience delivering AI/ML solutions for enterprise clients across various industries.
</li>
<li>Strong understanding of advanced Generative AI techniques and enterprise LLM deployments.</li></ul></div>

Full-Stack Developer (Python & React)

CodexCape Solutions

We&rsquo;re looking for a Backend AI Developer to join our growing team. This is your chance to architect the brains behind next-gen AI applications building powerful, scalable backends that make the magic happen.Key Responsibilities<ul><li>Design, build, and maintain secure backend systems for AI-driven platforms.</li><li>Develop and optimize RESTful/GraphQL APIs for frontend and mobile apps.</li><li>Integrate AI/ML models (NLP, speech-to-text, recommendation engines, third-party AI APIs) into production environments.</li><li>Manage databases, cloud infrastructure, and data pipelines for high availability and scalability.</li><li>Collaborate with frontend devs, data scientists, and designers to ship end-to-end intelligent solutions.</li><li>Implement strong security, authentication, and RBAC protocols.</li><li>Continuously optimize performance and system scalability.</li></ul>Requirements<ul><li>Proven experience as a Backend Developer with AI/ML integration.</li><li>Proficiency in Python (FastAPI/Django/Flask) or Node.js.</li><li>Strong grasp of databases (SQL &amp; NoSQL) and cloud platforms like AWS, Google Cloud Platform, Microsoft Azure.</li><li>Hands-on experience with API design, microservices, and serverless architectures.</li><li>Familiarity with AI/ML frameworks (TensorFlow, PyTorch) and APIs (OpenAI, Hugging Face, etc.).</li><li>Solid understanding of data structures, algorithms, and backend performance optimization.</li><li>Strong knowledge of security practices (auth, encryption, authorization).</li><li>Collaborative mindset and problem-solving chops.</li><li>Bonus: experience with real-time systems and streaming data pipelines.</li><li>Bonus: experience scaling AI models in production.</li></ul>What We Offer<ul><li>Opportunity to work on cutting-edge AI projects with real-world impact.</li><li>Collaborative, growth-driven culture that values innovation.</li><li>Exposure to diverse industries and global clients.</li><li>Competitive compensation aligned with your experience.</li><li>A chance to be part of Codexcape&rsquo;s mission to build intelligent, scalable, future-ready solutions.</li></ul>How to ApplySend your CV and portfolio to: info@codexcape.solutions Office No. 2, Mezzanine Floor, Building 53-C, Badar Commercial Area, DHA, Karachi Phone: (021) 37520351Job Types: Full-time, Contract, FresherPay: Rs80,000.00 - Rs120,000.00 per monthExperience:<ul><li>AI development: 1 year (Preferred)</li></ul>Location:<ul><li>Karachi (Preferred)</li></ul>Work Location: In person

Backend AI Developer

AutoScale Ventures

<div>Location: Remote (Pakistan)
Job Type: Full-time
Work Schedule: 09:00AM-05:00PM (Pacific Standard Time)
Role Overview:
We're looking for a Senior Python Backend Developer to join our team. In this role, you'll play a key part in designing and maintaining our backend infrastructure, building high-quality data products, and solving complex problems using our vast automotive datasets. You'll work closely with fellow developers and stakeholders to drive technical projects from conception to deployment while contributing to the overall reliability, scalability, and performance of our systems.
Key Responsibilities:<ul><li>
Lead the design, development, and deployment of core backend systems and data products</li><li>
Build scalable, high-performance infrastructure to support data-heavy applications</li><li>
Optimize backend systems for maintainability, performance, and scalability</li><li>
Oversee and maintain production systems to ensure reliability, up-time, and data accuracy</li><li>
Proactively troubleshoot and resolve technical issues in live environments</li><li>
Develop and refine automated data scraping pipelines</li><li>
Leverage our proprietary datasets to solve industry-specific problems and deliver value to customers</li><li>
Work closely with developers, analysts, and stakeholders across the company</li><li>
Mentor junior developers, providing guidance on best practices, code quality, and career growth</li><li>
Maintain clear, up-to-date technical documentation for systems and processes</li><li>
Explore and prototype new ideas for data-driven web applications and business models</li></ul>
Requirements:<ul><li>
5+ years of experience in Python (preferably in a production environment), with a solid understanding of best practices for writing clean, maintainable code</li><li>
Hands-on experience with Python frameworks such as Flask, FastAPI, and optionally Scrapy for data scraping</li><li>
Strong working knowledge of Linux systems and SQL databases. Experience with distributed databases is a plus</li><li>
Experience with PostgreSQL or MySQL in production environments</li><li>
Experience designing, building, and supporting backend systems from scratch</li><li>
Comfortable managing and optimizing live production systems</li><li>
Familiarity with data scraping techniques and large-scale data processing</li><li>
Self-driven and highly productive with minimal supervision in a remote work environment</li><li>
Strong written and verbal communication skills, with the ability to work across time zones and collaborate with a global team</li><li>
A passion for solving problems creatively and exploring new data-driven business ideas</li></ul>
Nice to Have:<ul><li>
Familiarity with PHP is a plus, especially in hybrid environments involving LAMP/LEMP stacks</li><li>
Experience mentoring or working with junior developers</li><li>
Demonstrated initiative through personal or open-source projects</li></ul>
Benefits &amp; Perks:<ul><li>
Fully Remote Work Work from anywhere with a reliable internet connection</li><li>
Healthcare Coverage We provide health benefits for you and your family's well-being</li><li>
Leave Days, Vacation Time, and Paid Holidays Recharge and take the time you need</li><li>
Equipment Funds Get support to set up or upgrade your home office</li><li>
Profit Sharing Monthly and annual bonuses tied to company performance</li><li>
Long-Term Employment We value team members who grow with us</li><li>
Collaborative Team Culture Work with a supportive and globally distributed team</li></ul>
About Us:
AutoScale Ventures is a technology-driven company with 50+ team members across the Philippines, Pakistan, India, the U.S., China, and Canada. We operate a group of businesses spanning tech, data services, recruiting, and real estate, including:<ul><li>
VinAudit: Vehicle history and market data provider</li><li>
Proxy Services: High-speed private proxy solutions</li><li>
EliteWork: Remote workforce platform and SaaS productivity tool</li><li>
Voliplex: Long-term U.S. real estate investment firm</li></ul>
We're committed to building scalable, data-driven solutions and empowering a globally distributed team.
Important Note: Only those who are shortlisted will be contacted. We look forward to meeting the right person for this role!</div>

Senior Python Backend Developer

Kuza Ventures

Position: Backend Python Developer Industry: IT Location: Karachi Job Role: Onsite Experience: 3-5 Years Education: Bachelor's or Master's in Computer Science or a degree in a relevant fieldResponsibilities: - Senior backend developer that can build scalable systems. - Working technical knowledge of Python ,Flask API's, and Graph QL - Must have experience with AWS or Azure. - Develop and create new software programs and applications. - Plan phases of the software development life cycle (SDLC) for various projects. - Experience with MySQL, MS SQL and Postgres database. - Experience with CI/CD pipelines and related tools.Job Type: Full-timePay: Rs200,000.00 - Rs300,000.00 per monthWork Location: In person

Backend Python Developer

Launch Box

Job description:Senior Backend Developer &ndash; Join Our Growing Team!Location: Emarah Suites, Main Shahra-e-Faisal, Karachi Timings: 12:00 PM &ndash; 9:00 PM Employment Type: Full-time | On-siteAbout Us: We are a dynamic and fast-growing tech company dedicated to delivering high-quality, scalable, and innovative solutions for our global clients. We value creativity, problem-solving, and a passion for technology.Position Overview: We&rsquo;re looking for a Senior Backend Developer with strong expertise in Node.js and proficiency in multiple backend technologies. You will architect, develop, and maintain scalable APIs, databases, and backend systems, ensuring optimal performance and security.Key Responsibilities: Design, develop, and maintain robust backend systems and APIs, primarily using Node.js. Work with multiple backend languages and frameworks such as Python, PHP, Java, Go, or .NET when required. Collaborate with frontend developers, mobile engineers, and DevOps teams to deliver end-to-end solutions. Optimize applications for maximum speed, scalability, and security. Manage and maintain databases (SQL &amp; NoSQL) including PostgreSQL, MySQL, MongoDB. Implement best practices for code quality, testing, and deployment. Troubleshoot and debug applications, ensuring smooth performance. Mentor junior developers and lead code reviews.Requirements: 3+ years of backend development experience. Strong expertise in Node.js (Express.js, NestJS, or similar frameworks). Experience with RESTful APIs, GraphQL, and microservices architecture. Familiarity with cloud platforms (AWS, Azure, or GCP). Strong understanding of SQL &amp; NoSQL databases. Proficiency in other backend languages such as Python, PHP, Java, Go, or .NET. Knowledge of authentication, authorization, and security best practices (OAuth, JWT, etc.). Experience with Git and CI/CD pipelines. Strong problem-solving skills and attention to detail.Nice to Have: Experience with Docker, Kubernetes, and container orchestration. Knowledge of serverless architectures. Exposure to real-time systems (WebSockets, Socket.io).Job Type: Full-timeWork Location: In personJob Type: Full-timeWork Location: In person

Senior Node.js Developer

<div>Position: React Native Developer 
Location: Pakistan

Summary

React Native Developer at Systems Limited will be working in a full-stack environment and have a solid understanding of cloud-native development principles. You will be responsible for designing, developing, and maintaining mobile applications while collaborating with cross-functional teams to deliver high-quality software solutions.

Responsibilities
<ul>
<li>Develop, test, and maintain high-performance React Native mobile applications for iOS and Android platforms.</li>
<li>Write clean, maintainable, and efficient code using JavaScript and related technologies.</li>
<li>Collaborate with backend developers to integrate APIs using Node.js and GraphQL.</li>
<li>Utilize jQuery and other frontend tools as needed for web-related components or hybrid app features.</li>
<li>Implement cloud-native solutions and deploy applications on cloud platforms (AWS, Azure, GCP, etc.).</li>
<li>Work with Python scripts or backend services to automate tasks, support data processing, or integrate services.</li>
<li>Participate in code reviews, troubleshoot, and debug issues to improve application performance.</li>
<li>Stay updated with the latest industry trends and technologies to continuously improve development practices.</li>
<li>Coordinate with product managers, designers, and other stakeholders to understand requirements and deliver solutions on time.</li>
</ul>
Requirements
<ul>
<li>Proven experience as a React Native developer with a strong portfolio of mobile applications.</li>
<li>Proficiency in JavaScript (ES6+) and solid understanding of React Native framework.</li>
<li>Experience with backend technologies, especially Node.js and GraphQL.</li>
<li>Familiarity with frontend libraries such as jQuery is a plus.</li>
<li>Knowledge of Python programming for automation or backend services.</li>
<li>Understanding of cloud-native development, containerization (Docker), and cloud services (AWS, Azure, GCP).</li>
<li>Experience with version control systems like Git.</li>
<li>Strong problem-solving skills and ability to work independently and in a team environment.</li>
<li>Excellent communication skills and ability to collaborate across teams.</li>
<li>Bachelor&rsquo;s degree in Computer Science, Engineering, or a related field (or equivalent practical experience).</li></ul></div>

React Native Developer

Explore 258+ Backend developer python fastapi in Karachi this September. Find roles across top companies and apply now to boost your career.