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Hire the best API Developers in Baltimore, MD

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Jake S.

Baltimore, Maryland

$65/hr
5.0
8 jobs
Senior Full Stack / Serverless Engineer specializing in migrating from legacy code, working in polyglot (multi-language) environments, and protecting data integrity. I build modular, testable, and scalable systems that guarantee the integrity of your data, ensuring it can keep up with all your business needs. I have driven the migration of large-scale enterprise applications from legacy implementations to modern, cloud-based architectures while ensuring no loss of data in flight and minimizing downtime. As business needs change, technologies evolve, and developers leave a team, you must get to a robust, easy-to-maintain, well-documented codebase. Without institutional knowledge of the history behind each design decision, you can wonder how to escape a chaotic situation without affecting your end users. I bring a systematic approach to navigating these kinds of projects. Whether this is where your system is now, or you're starting something new and want to ensure you keep up with best practices from the start, working with me will ensure you end up with maintainable, thoroughly tested, clearly documented, and stable code. I will start by getting to know your business needs and technical requirements and, from there, develop a plan that divides your goals into clearly defined short-term milestones. My fixed-priced contracts ensure that your budget is not affected by surprises. At the same time, my agile approach to planning will keep things flexible enough to accommodate any shifting priorities.
  • API Development
  • Web Development
  • RESTful API
  • Microservice
  • Terraform
  • AWS Lambda
  • Cloud Services
  • Automated Deployment Pipeline
  • Node.js
  • ExpressJS
  • Koa
  • Flask
  • API Integration
  • Spring Boot
Serhii R.

Baltimore, Maryland

$40/hr
5.0
1 jobs
I’m a Shopify backend developer specializing in custom app development, API automation, and large-scale product management for Shopify and Shopify Plus. I help fast-growing eCommerce brands extend Shopify’s capabilities — from backend integrations and private plugins to bulk product synchronization for catalogs with 100K+ items. I focus on efficiency, scalability, and automation — delivering solutions that cut operational costs, eliminate manual work, and improve store performance. Featured Projects: Artifical Floral — Modern floral & décor brand • Developed a custom delivery management app with Google Maps API integration • Built an automated inventory sync system for local suppliers via Shopify Admin API • Implemented a custom checkout extension with real-time shipping logic • Reduced manual order processing time by 60% Crown Jewelry — Luxury jewelry eCommerce platform • Designed a Shopify app for custom engraving and product personalization • Integrated ERP and payment systems using REST & GraphQL APIs • Built a backend importer/exporter handling 100K+ product updates with smart batching, rate-limit handling, and error recovery • Increased operational efficiency and data accuracy across catalogs Core Technical Skills: • Shopify App Development (Custom & Private Apps) • Large-scale Product Import/Export (100K+ SKUs) • Shopify API (REST / GraphQL) • Node.js / Express.js / TypeScript • Liquid, React, HTML5, CSS3, JavaScript (ES6+) • OAuth, Webhooks, and Scheduled Jobs • Cloud Functions (AWS Lambda / Google Cloud) • PostgreSQL / MongoDB • App Bridge, Polaris, Shopify CLI • Performance Optimization & Security Best Practices Work Experience: Shopify Developer (Freelance) 2021 – Present Delivering backend-driven eCommerce solutions for U.S. and European brands. I specialize in automating Shopify workflows, scaling product data imports/exports, and creating custom apps that help businesses manage complex catalogs and integrations seamlessly.
  • API Development
  • Shopify
  • Shopify Apps
  • Shopify Development
  • Shopify Templates
  • Python
  • Google Cloud Platform
  • PostgreSQL
  • MySQL
  • Terraform
  • API Integration
  • API
  • Automation
Ayo A.

Baltimore, Maryland

$80/hr
Software development and DevOps professional prepared for high-impact roles within technology-driven environments and extensive background in designing and optimizing software solutions, with commitment to delivering high-quality results.
  • API Development
  • Web Development
  • Product Development
  • Python
  • Java
  • React
  • MERN Stack
  • AI Agent Development
  • AI App Development
  • API Framework
Nelson C.

Baltimore, Maryland

$25/hr
𝗛𝗶, 𝗜’𝗺 𝗡𝗲𝗹𝘀𝗼𝗻 — 𝗮 𝗙𝘂𝗹𝗹-𝗦𝘁𝗮𝗰𝗸 𝗦𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 𝘀𝗽𝗲𝗰𝗶𝗮𝗹𝗶𝘇𝗶𝗻𝗴 𝗶𝗻 𝗣𝘆𝘁𝗵𝗼𝗻, 𝗔𝘇𝘂𝗿𝗲 𝗦𝗲𝗿𝘃𝗲𝗿𝗹𝗲𝘀𝘀, 𝘄𝗼𝗿𝗸𝗳𝗹𝗼𝘄 𝗮𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻, 𝗮𝗻𝗱 𝗺𝗼𝗱𝗲𝗿𝗻 𝗥𝗲𝗮𝗰𝘁 𝗳𝗿𝗼𝗻𝘁𝗲𝗻𝗱𝘀. I help businesses turn slow, manual processes into fast, reliable, cloud-powered systems that actually save time and money. Recently, I designed and delivered an 𝗔𝗜-𝗽𝗼𝘄𝗲𝗿𝗲𝗱 𝗶𝗻𝘃𝗼𝗶𝗰𝗲 𝗮𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻 𝗽𝗹𝗮𝘁𝗳𝗼𝗿𝗺 that: • Cut manual processing by 85% • Extracted data from PDFs with 𝗔𝘇𝘂𝗿𝗲 𝗗𝗼𝗰𝘂𝗺𝗲𝗻𝘁 𝗜𝗻𝘁𝗲𝗹𝗹𝗶𝗴𝗲𝗻𝗰𝗲 • Used 𝗖𝗼𝘀𝗺𝗼𝘀 𝗗𝗕 𝘃𝗲𝗰𝘁𝗼𝗿 𝘀𝗲𝗮𝗿𝗰𝗵 to improve accuracy • Ran end-to-end workflows on 𝗔𝘇𝘂𝗿𝗲 𝗗𝘂𝗿𝗮𝗯𝗹𝗲 𝗙𝘂𝗻𝗰𝘁𝗶𝗼𝗻𝘀 • Included a custom 𝗥𝗲𝗮𝗰𝘁 + 𝗧𝘆𝗽𝗲𝗦𝗰𝗿𝗶𝗽𝘁 dashboard for approvals and data validation I bring the same level of engineering quality, communication, and problem-solving to every project I work on. If you're looking for someone who can architect your backend, integrate APIs, build a UI, or fully automate a workflow, I can help. 𝗪𝗵𝗮𝘁 𝗜 𝗱𝗼 𝗯𝗲𝘀𝘁: • Python backend development • Azure Functions & Durable Functions • Workflow automation + API integrations • Document processing & AI-assisted workflows • React + TypeScript frontends • CI/CD with GitHub Actions • Secure application design (Entra ID, JWT, Key Vault) 𝗪𝗵𝗮𝘁 𝘆𝗼𝘂 𝗰𝗮𝗻 𝗲𝘅𝗽𝗲𝗰𝘁: • Clean, maintainable code • Clear communication • Fast iteration • Solutions aligned to your business goals • A developer who cares about both engineering and outcomes If you want a reliable engineer who can take a problem from concept → architecture → code → deployment, let’s connect.
  • API Development
  • React
  • TypeScript
  • JavaScript
  • Web Development
  • Front-End Development
  • Back-End Development
  • Node.js
  • Microsoft Azure
  • Serverless Stack
  • Python
  • API Integration
  • REST API
  • Automation
  • AI Development
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