Upstaff Developer Profile Directory

• Over 10 years of expertise in Ruby on Rails and PostgreSQL, specializing in scalable web applications and performance optimization.
• Proven track record in designing modular microservices and implementing automated KYC systems, enhancing verification success, and reducing manual workload.
• Extensive experience with Angular (5+ years) and React for full-stack development, delivering high-traffic social networks and CRM platforms.
• Skilled in REST/GraphQL APIs, real-time high-concurrency backend architectures, and cloud technologies including AWS and Docker.

• Proficient in full-stack development with expertise in TypeScript, React, Rust, Swift, and backend technologies including Prisma, PostgreSQL, and Bun, demonstrated through building scalable CMS, native macOS apps, and terminal tools.
• Skilled in asynchronous programming, Rust backend refactoring, and cross-platform development using Tauri and React Native, enhancing startup latency and memory usage.
• Hands-on with CI/CD pipelines, AWS deployment, and monitoring to maintain 99.9% uptime, alongside advanced automation integrating AppleScript and AI-driven transaction parsing.

• Over 6 years of experience in full-stack development, AI/ML engineering, and cloud-native architecture, with a BSc. in Computer Engineering from University of Ghana
• Proficient in JavaScript, TypeScript, Python, and frameworks like React, Next.js, Node.js, and Express, delivering scalable SaaS and mobile solutions
• Led end-to-end product development as CTO, architecting high-availability systems with 99.9% uptime and automated CI/CD pipelines on AWS and GCP
• Skilled in agile methodologies, test-driven development, and DevOps practices, optimizing cloud workflows and ensuring robust, maintainable codebases

• Lead Blockchain Engineer with 6+ years in software engineering and 5+ years specializing in Solidity and DeFi protocol architecture on EVM-compatible chains.
• Expertise in designing and deploying upgradeable DeFi vaults (ERC-4626), AMMs, DEXs, order-book trading systems, and yield-farming automation.
• Proficient with Hardhat, Foundry, OpenZeppelin, Slither, Chainlink oracles, ethers.js, and Web3.js for secure, gas-optimized smart contract development and audits.
• Experienced in leading distributed teams, enforcing protocol security strategies, and coordinating multi-disciplinary engineering workflows for production-grade blockchain solutions.

• Senior Data Engineer with 8+ years in fintech, banking, and telecom, skilled in Python, Java, SQL, and cloud-native tools like Airflow, Spark, Kafka, Redshift, and Snowflake.
• Expertise in building scalable ETL pipelines, real-time data processing, and AI integrations using Huggingface and Kubernetes, improving data integrity and reducing pipeline breakage by 85%.
• Proficient in cloud infrastructure automation with Terraform, CloudFormation, and container orchestration using Docker and Kubernetes.
• Strong background in Agile methodologies (Scrum, Kanban), TDD, CI/CD pipelines, and delivering high-impact data engineering solutions across multiple international organizations.

• 7+ years of experience in full-stack development using Node.js, TypeScript, Vue.js, and PostgreSQL for scalable SaaS and AI-powered platforms.
• Skilled in database design, query optimization, and managing large-scale datasets for high-performance applications.
• Experienced in AI/LLM integration using OpenAI and Anthropic APIs for automation and intelligent workflows..
• Strong knowledge of algorithms, data structures, software architecture, and modern design patterns.
• Proficient in AWS, Azure, Docker, CI/CD, and cloud-native deployments for enterprise systems.

• 5+ years of freelance experience building custom WordPress platforms with Python/PostgreSQL backends and AI-powered features.
• Skilled in FastAPI, ETL automation (Pandas, Airflow), and serverless deployments on AWS Lambda.
• Experienced in WordPress plugin/theme development, Gutenberg blocks, performance optimization, and access control systems.
• Proficient in AI/LLM integration, prompt engineering, summarization, and OpenAI/Anthropic APIs.
• Strong frontend skills with JavaScript, DataTables, Chart.js, and remote collaboration across EST time zones.

• 5+ years of experience building custom WordPress platforms
• Expertise in building REST APIs with FastAPI, ETL pipelines using Pandas and Airflow, and deploying serverless applications on AWS Lambda.
• Skilled in developing WordPress plugins, themes, and Gutenberg blocks for subscriber-based platforms, with expertise in role-based access control and performance optimization.
• Proficient in AI/LLM integration including prompt engineering, natural-language querying, and summarization using OpenAI and Anthropic APIs.
• Strong frontend development skills with JavaScript, DataTables, and Chart.js for dynamic, interactive data visualizations and reporting interfaces.

• AI Automation Specialist with 3+ years of experience designing and deploying AI-powered solutions for healthcare, coaching, and service-based businesses.
• Skilled in building AI patient acquisition systems, AI receptionists, lead qualification workflows, conversational AI agents, and CRM-integrated automation.
• Experienced in creating high-converting sales funnels, automated follow-up sequences, and multi-channel marketing systems across email, SMS, and WhatsApp.
• Hands-on experience with AI systems integration, scalable automation architectures, and marketing automation infrastructures across diverse markets including US, UK, Australia, and Nigeria.

• 10+ years of experience delivering scalable SaaS platforms and cloud-native systems using React, TypeScript, Python (FastAPI, Django), Node.js, and AWS.
• Proven expertise in legacy system modernization, reducing API response times from 3s to under 1.8s by migrating C#/.NET services to modern microservices.
• Strong in system design, distributed systems, event-driven architectures with Kafka, Celery, Redis, and performance optimization.
• Skilled in full SDLC ownership, CI/CD pipelines, containerization (Docker, Kubernetes), and infrastructure as code for reliable cloud deployments.

Senior Software Engineer with 10+ years of experience building scalable backend and data-intensive systems. Focus on clean architecture, and real-world impact

• Full-Stack Engineer with 3+ years of experience in scalable SaaS and AI-driven platforms, specializing in React, Next.js, Node.js, GraphQL, and asynchronous event-driven systems.
• Proficient in integrating OpenAI APIs, RAG pipelines, vector databases, and secure authentication (Auth0, OAuth) for enterprise-grade, multi-tenant architectures.
• Cross-platform apps serving 1,500+ users with optimized APIs, message queues, and AWS cloud infrastructure.
• Skilled in modular component design, performance optimization, CI/CD pipelines, and cloud using AWS, Docker, and Supabase.
• Bachelor’s in Computer Science with achievements including ICPC Asia ranking and leadership roles in developer communities.

• Over 9 years of experience in software development with a focus on Java 8/17 back-end applications, utilizing Spring Boot and HAPI FHIR frameworks.
• Proficient in designing and developing APIs, business logic, and database solutions using PostgreSQL, Kafka, Docker, and Liquibase in healthcare and finance sectors.
• Strong expertise in object-oriented design, design patterns, and software development lifecycle within Agile methodologies including Scrum and Kanban.
• Hands-on experience with HL7/FHIR protocols and standards, contributing to protocol converter projects for healthcare applications.

• 3+ years in SaaS QA engineering with expertise in manual and automation testing using Selenium, Playwright, and Katalon Studio.
• Proficient in Java, Python, JavaScript, TypeScript, C#, SQL, and test automation frameworks integrated with CI/CD pipelines (GitHub Actions, Jenkins).
• Strong command of STLC, risk-based testing, shift-left principles, API validation (Postman), and defect lifecycle management using Jira and Linear.
• Led QA for 3 SaaS products, designing 500+ reusable test cases covering 50+ features, achieving ~45% regression automation coverage.
• Experienced in Agile methodologies, sprint coordination, mentoring junior engineers, and driving process improvements for release stability.

• Senior React Native engineer with 9+ years in mobile and web development, including 6+ years with React Native in production.
• Delivered cross-platform applications across healthcare, fintech, real estate, and logistics domains, including patient-facing clinical trial apps (HIPAA-compliant).
• Experience includes real-time features using WebRTC, offline-first data handling, and performance optimisation for mobile apps.
• Worked with React, Next.js, GraphQL, and AWS; contributed to mobile architecture and led frontend teams.

• Senior React Native engineer with 7+ years building mobile apps with React Native (Expo, CLI) and React, focusing on scalable app architecture and feature delivery.
• Experience with video features in social and communication apps (live streams, video calls, feed-based consumption), including HLS playback, buffering, and performance tuning on mobile.
• Worked on mobile-first video UX: smooth playback, fast loading, adaptive bitrate, and seamless navigation between video items.
• Hands-on with monetization, analytics, and integrations (Firebase, GraphQL), plus mentoring and collaboration across product and backend teams.

• Backend Engineer with 4+ years of experience in Java, TypeScript, and Python, working with Spring Boot and NestJS in microservices architectures.
• Experience in healthcare integrations: worked with Epic/MyChart, HL7 (R4) data processing and conversion into internal services.
• Built and maintained backend services handling high-load systems using Kafka, Redis, Cassandra, and PostgreSQL.
• Developed integration services for third-party systems, including batch processing and REST-based communication in AWS environments.

• Engineering background from IIT Patna with a strong CGPA of 8.97 in Computer Science and Engineering.
• Hands-on experience in modernizing high-stakes trading platforms using React functional components and Material UI, enhancing performance and scalability.
• Proficient in C++, Python, JavaScript, Node.js, and web technologies with expertise in algorithmic trading strategies and risk management, achieving 2500% returns in simulated markets.
• Demonstrated competitive programming excellence with top global ranks in ICPC and Hacker Cup, and advanced problem formulation for AI code generation.

• Digital Communication
• Calendar/Email Management
• Project Management
• Technical Tool Proficiency
• Interpersonal Skills

• Help In Calendar Management
• Email Triaging
• Customer Service
• Data Entry
• Managing and Organizaing Workforce
• Recruiting Plan
• Onboarding And Training
• Processing Payment
• Reconciliation
• Payroll Processing
• Financial Reporting
• Budgeting and Forecasting
• Auditing

I have been able to achieve so many things in a financial investment company,I learnt how to check the bank position of the company daily,how to confirm payment etc

• Senior Java Engineer with 10+ years of experience specializing in Java, Spring Boot, Hibernate, and microservices architecture.
• Proficient in full-stack development using Angular, React, TypeScript, and RxJS, with strong expertise in PostgreSQL, Redis, and cloud platforms (GCP, AWS, Azure).
• Hands-on experience delivering scalable solutions in real estate compliance, ticket management, and corporate social networking domains.
• Skilled in CI/CD pipelines, containerization (Docker, Kubernetes), automated testing (JUnit, TestNG, Mockito), and code quality tools (SonarQube).
• Holds a Bachelor’s degree in Informatics and certifications in Java and Google Cloud.

• Over 25 years of expertise in network management, design, and security-focused automation, with leadership roles including CTO and Head of Operations.
• Proficient in Perl, Python, and C, with extensive experience in protocols (XML, JSON, YAML, REST) and databases (MySQL, PostgreSQL, SQLite, ElasticSearch).
• Skilled in containerization and orchestration using Docker, Proxmox, and Gitlab CI/CD pipelines, emphasizing continuous development and automation.
• Active contributor and maintainer of multiple open-source projects such as LetheanVPN, AIdraw, and Zabbix integrations
• Solid academic foundation with a PhD in Computer Science and practical experience across Linux, FreeBSD

• Over 25 years of experience in network administration, VoIP technologies, and cybersecurity, with a strong focus on SIP server configuration and Asterisk implementation.
• Proficient in Python programming, Blockchain, Linux, and ElasticSearch, with hands-on expertise in developing embedded multiplatform SIP server solutions.
• Extensive academic background including a PhD in Information Technology
• Leadership roles as CTO and Head of Operations, driving security operations and software development in cybersecurity firms.
• Active contributor to open-source projects and academic conferences, with published work on Kamailio syntax generation and configuration parsing.

• 6+ years with Front-end/Mobile: cross-platform applications, React Native, React.
• IoT & hardware: BLE and Wi-Fi device pairing (Soft-AP, Protobuf), custom native bridges (iOS/Android) for hardware communication - Ninja Pro Connect app with 100K+ downloads
• Short-form video: TikTok-style educational app with HLS playback (Expo Video), player pooling, lazy loading of video batches, and quality fallback for low-end devices
• Production tooling: push notifications (Firebase + Notifee, Android foreground/keep-alive services), analytics/session replay (Mixpanel, LogRocket, Sentry, Bugsnag), CI pipelines, ESLint + pre-commit quality gates.
• Familiar with New Architecture (Fabric, TurboModules, JSI, Hermes)

Led full-stack development of 20+ production applications combining React frontends with AI-powered Python backends. Integrated LLM APIs (Groq, Gemini, Anthropic) into customer projects, building RAG systems and fine-tuned models on local GPUs. Mentored 5+ junior developers. Recently built production React+Flask chatbot with Groq API, deployed on Vercel. Portfolio: https://pro-two-chi.vercel.app/

• Senior React Native Developer with 16 years in software development, specializing in cross-platform mobile applications for iOS and Android using React Native and Expo.
• Proficient in JavaScript, TypeScript, Node.js, and backend technologies including Express.js, MongoDB, and MySQL, with extensive experience in API design and integration.
• Expertise in AI-assisted development tools (Claude Code, Cursor, GitHub Copilot) to accelerate delivery and improve code quality.
• Skilled in modern CI/CD pipelines (GitLab, GitHub Actions, Fastlane, Azure DevOps) and testing frameworks (Jest, Detox) ensuring robust, maintainable software.

Backend-focused Full Stack Developer with 1+ year of experience in Node.js, Express.js, TypeScript, and Sequelize ORM. Skilled in building scalable REST APIs, JWT authentication with RBAC, and database optimization using MongoDB and MySQL. Experienced in React.js, Next.js, and Tailwind CSS for frontend development. Proficient in Firebase Cloud Messaging, ExcelJS, Puppeteer, AWS EC2, and Cloudinary. Strong understanding of asynchronous programming, middleware architecture, OOP, and API integration. B.Tech graduate in Information Technology with a passion for developing secure, scalable, and high-performance applications.

• Senior Software Engineer with 5+ years in frontend and full stack development, specializing in Next.js, Angular, and scalable architectures for Web3 and AI-driven platforms.
• Proven expertise in blockchain integrations, real-time systems, and API design, delivering features like automated on-chain actions and wallet-based authentication.
• Strong backend skills with FastAPI, Python, PHP, and database optimization (PostgreSQL, SQLite), improving performance and reducing errors by up to 25%.
• Experienced in mobile app development using Ionic and Cordova, enhancing user engagement and offline functionality for global clients.

• Software Engineer with 1+ years of experience in developing scalable full-stack applications using .NET (C#), React.js, and SQL Server, focusing on responsive UI and efficient backend integration.
• Expertise in AI-driven automation, including LLM-powered applications, Retrieval-Augmented Generation (RAG), prompt engineering, and vector embedding pipelines using Python and AI frameworks like TensorFlow and PyTorch and Exploratory Data Analysis (EDA) to support AI/ML model development and deployment
• Proficient in designing and optimizing REST APIs, database query workflows, and integrating intelligent automation solutions within Agile cross-functional teams.

• 7+ years expertise in Go, specializing in distributed systems, microservices, and legacy system modernization with zero downtime.
• Contributor to open-source projects (KrakenD API Gateway), with published works on distributed teams and mesh networking, demonstrating commitment to software architecture excellence and continuous learning.

• Software engineer with over 7 years of experience specializing in full stack and front-end development.
• Proficient in AngularJS, Sockets, and web/mobile tool development, with a strong background in modern web technologies and frameworks.
• Experienced in Agile methodologies and collaborative team environments across international projects in Spain, the US, Dominican Republic, Argentina, and Venezuela.
• Holds a degree in Informatics from Universidad de Oriente, providing a solid foundation in computer science principles and software development lifecycle.
• Demonstrated ability to maintain and enhance commercial platforms, integrating user feedback and ensuring robust, scalable solutions.