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$20/hr
$700+ earned
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Hi, As a seasoned data engineering professional, I have successfully spearheaded multiple high-impact projects across various domains, utilizing a comprehensive array of technologies to enhance data processing, integration, and business analytics. My expertise spans from creating robust data platforms to optimizing data-driven decision-making processes. Technologies Expertise: Data Platforms and Tools: Extensively experienced with Snowflake, including advanced features like Snowpark, SnowSQL, and Snowpipe. Proficient in leveraging ETL tools such as Talend, Informatica, DBT, and Matillion, and integrating systems like Amplitude and SFMC for comprehensive marketing insights. Programming and Analytics: Advanced proficiency in Python, utilizing libraries such as PySpark, NumPy, and pandas for data analysis and machine learning. Skilled in managing cloud environments and tools across GCP, Azure, and AWS, facilitating seamless data operations and scalability. Database and API Management: Expert in managing SQL Server, Oracle databases, and designing RESTful APIs, transitioning legacy systems to modern, scalable architectures. Work Contributions: Data Integration and Pipeline Design: Successfully designed and implemented data pipelines that collect, cleanse, and merge data from diverse sources, ensuring unified and analytics-ready datasets. My work includes setting up enterprise-level data fetching from platforms like Outlook, Google Ads, and LinkedIn, enhancing data accessibility and utility. Cloud Migration and Automation: Led the migration of data infrastructure from on-premises to cloud-native solutions, significantly reducing overhead and improving data agility. Automated data workflows using AWS services, optimizing operational efficiency and response times. API Development and System Upgrades: Transitioned from WCF SOAP-based services to modern REST APIs, improving system interoperability and performance. My approach focuses on thorough analysis and testing, ensuring robust implementations. Business Impact: Enhanced Data Utilization: My projects have consistently enabled deeper insights into customer behaviors and preferences, facilitating personalized marketing strategies that significantly boost return on investment. Operational Excellence and Growth: Through strategic migrations to cloud-native data systems and by optimizing data pipelines, I have empowered businesses to scale operations and explore new growth avenues effectively. These transformations have led to improved data handling capabilities and cost efficiencies. Strengthened Client Relationships: My focus on collaborative project execution and stakeholder engagement has helped organizations maintain and expand their client bases. By providing actionable insights and reliable data solutions, I have assisted companies in understanding and leveraging their data to outperform competition and achieve strategic goals. This blend of technical acumen, strategic implementation, and impactful results demonstrates my capability to deliver superior data engineering solutions that meet and exceed business needs. I am dedicated to bringing the same level of excellence and innovation to your projects, ensuring that your organizational objectives are achieved efficiently and effectively. Thanks.
$15/hr
$400+ earned
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I have professional experience working in the government sector, where I developed strong administrative, analytical, and client-facing skills. I am highly proficient in handling large volumes of records using Excel, including advanced functions and Pivot Tables for transaction monitoring and data analysis. I regularly analyze datasets for executives to support reporting and decision-making. In addition to my administrative background, I am now working as a programmer with hands-on experience in SQL, Oracle APEX, Visual Basic, and VBA Macro development. I build and maintain database-driven applications, automate processes, and develop system solutions to improve operational efficiency. My technical background allows me to bridge the gap between data management and system development. I am comfortable working in fast-paced environments that require multitasking, accuracy, and flexibility. I also have strong communication skills, both face-to-face and online, enabling me to effectively handle clients and stakeholders. I am continuously motivated to explore new platforms, tools, and technologies to expand my skill set and gain broader perspectives in problem-solving and system improvement.
Jayant C.
$20/hr
100% Job Success
Available now
Offers consultations
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✅ Top Rated Plus | 100% JSS | 4x Certified (AWS SA Pro, GCP Pro Architect, Snowflake) | BITS Pilani MTech Data Science | Full Stack Developer & Data Engineer | React, Python, Node.js, Spark | $20K+ earned | 1,845+ hours I build full-stack web applications and data engineering systems that go to production, not to demo day. SaaS MVPs, Spark-based ETL pipelines, cloud architecture on AWS and GCP, I handle both the application layer and the data infrastructure behind it. 🔹 Full-Stack SaaS & Web Application Development React, Next.js, Node.js, and Python backends for SaaS platforms, dashboards, internal tools, and customer-facing apps. MVP to production on AWS/GCP with CI/CD, automated testing, and monitoring from day one. 19 Upwork contracts delivered with structured milestones. 🔹 Data Engineering & ETL Pipeline Architecture End-to-end data pipeline design with Apache Spark, PySpark, Scala, Snowflake, and Airflow. Batch and streaming ETL processing millions of records per run. Data lake architecture, warehouse modeling, analytics-ready output layers. 8+ years building production Spark + Cassandra systems at enterprise scale. 🔹 Cloud Architecture & Infrastructure (AWS + GCP) 4 cloud architecture projects on Upwork, all rated 5.0. $2,300 CloudStack design. AWS architecture advisory. EC2, Lambda, S3, RDS, EMR, Redshift on AWS. BigQuery, Dataflow, Cloud Functions on GCP. Terraform for IaC, Docker and Kubernetes for orchestration, zero-downtime deployments. 🔹 API Development & Backend Systems REST API and GraphQL backends with Node.js, NestJS, FastAPI, and Django. Microservices, Redis caching, WebSocket integrations, Stripe payment APIs, OAuth/JWT authentication. Backend services handling concurrent users at production scale. 🔹 Database Design & Data Modeling PostgreSQL, MongoDB, MySQL, Cassandra, DynamoDB, Redis. Schema design, query tuning, indexing, partitioning. Star and snowflake schemas, slowly changing dimensions, SQL optimization for analytics. Architecture decisions balancing performance, throughput, and cost. 🔹 AI Integration & Intelligent Applications OpenAI API, Hugging Face, NLP pipelines, chatbot systems, text extraction and summarization. Delivered NLP processing on Upwork. AI-powered features built into SaaS products as production features, not standalone experiments. 🔹 Real-Time Processing & Event-Driven Systems Kafka for event-driven architectures, change data capture, WebSocket dashboards, streaming pipelines for near-real-time analytics. Application events connected to data warehouse layers. 🔹 Frontend Performance & TypeScript Engineering React and Next.js with SSR/SSG for SEO-friendly rendering. TypeScript full stack. Core Web Vitals optimization, Tailwind CSS, responsive design. Fast-loading frontends that rank and convert. 🔹 DevOps, CI/CD & Production Systems Docker, Kubernetes, Terraform, GitHub Actions, GitLab CI. Serverless with AWS Lambda and GCP Cloud Functions. Monitoring, logging, alerting for production. Zero-downtime deployment strategies. 🔹 Technical Consulting & Architecture Advisory TypeScript and AWS Lambda tutor on Upwork, rated 5.0 over 13 hours. Cloud migration advisory, system design review, code audits, performance optimization, engineering mentorship. 📊 AWS Solutions Architect Professional + Associate (Dec 2026) | GCP Pro Cloud Architect (Jul 2026) | Snowflake Core (Jan 2026) 📊 MTech Data Science, BITS Pilani, ranked top 5 engineering institutions in India 📊 19 contracts, 100% JSS, Top Rated Plus, 1,845+ hours tracked, $20K+ earned 📊 "Jay's expertise brought the architecture design to life in ways I hadn't imagined" (5.0 rated) 📊 8+ years: React, Node.js, Python, Java, Scala across SaaS, healthcare, fintech, enterprise → Day 1: Requirements call + architecture proposal with tech stack rationale → Week 1: Sprint development, daily Loom/Slack updates, working code shipped → Ongoing: Weekly demos, priority reviews, transparent tracking, full documentation → Delivery: Documented code, CI/CD configured, deployment guide, 2-week post-launch support Full Stack: React, Next.js, Node.js, NestJS, Express, TypeScript, JavaScript, Python, FastAPI, Django Data: Apache Spark, PySpark, Scala, Snowflake, Airflow, Kafka, ETL, dbt, SQL, BigQuery Cloud: AWS (Lambda, EC2, S3, RDS, EMR, Redshift), GCP (BigQuery, Dataflow), Docker, Kubernetes, Terraform DB: PostgreSQL, MongoDB, MySQL, Redis, Cassandra, DynamoDB, Supabase AI: OpenAI API, Hugging Face, NLP, LLM Integration, TensorFlow, PyTorch 💬 Message me with your project scope or data challenge. I respond within 4 hours with a free assessment and can start within 48 hours.
Abdul R.
$30/hr
100% Job Success
$10K+ earned
Available now
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🚀YOU WILL GET A SYSTEM AUDIT REPORT FOR FREE🚀 🚨 𝗜𝗳 𝘆𝗼𝘂𝗿 𝘀𝘆𝘀𝘁𝗲𝗺 𝗯𝗿𝗲𝗮𝗸𝘀, 𝗜 𝗳𝗶𝗻𝗱 𝗶𝘁. 𝗜𝗳 𝗮𝗹𝗲𝗿𝘁𝘀 𝗳𝗮𝗶𝗹, 𝗜 𝗳𝗶𝘅 𝘁𝗵𝗲𝗺. 𝗜𝗳 𝘃𝗶𝘀𝗶𝗯𝗶𝗹𝗶𝘁𝘆 𝗶𝘀 𝗺𝗶𝘀𝘀𝗶𝗻𝗴, 𝗜 𝗯𝘂𝗶𝗹𝗱 𝗶𝘁 — 𝗴𝘂𝗮𝗿𝗮𝗻𝘁𝗲𝗲𝗱. Production issues don’t come from one place — they come from gaps across infrastructure, applications, networks, and security. I close those gaps. Client Testimonial: "𝐈 𝐫𝐞𝐚𝐥𝐥𝐲 𝐚𝐩𝐩𝐫𝐞𝐜𝐢𝐚𝐭𝐞 𝐲𝐨𝐮𝐫 𝐡𝐞𝐥𝐩, 𝐀𝐛𝐝𝐮𝐥. 𝐘𝐨𝐮 𝐚𝐫𝐞 𝐚𝐰𝐞𝐬𝐨𝐦𝐞! 𝐀𝐛𝐝𝐮𝐥 𝐰𝐚𝐬 𝐚𝐛𝐥𝐞 𝐭𝐨 𝐤𝐧𝐨𝐜𝐤 𝐨𝐮𝐭 𝐰𝐡𝐚𝐭𝐞𝐯𝐞𝐫 𝐈 𝐰𝐚𝐬 𝐥𝐨𝐨𝐤𝐢𝐧𝐠 𝐟𝐨𝐫 𝐢𝐧 𝐆𝐫𝐚𝐟𝐚𝐧𝐚. 𝐈 𝐰𝐨𝐮𝐥𝐝 𝐡𝐢𝐠𝐡𝐥𝐲 𝐫𝐞𝐜𝐨𝐦𝐦𝐞𝐧𝐝 𝐡𝐢𝐦 𝐭𝐨 𝐚𝐧𝐲𝐨𝐧𝐞 𝐰𝐡𝐨 𝐢𝐬 𝐥𝐨𝐨𝐤𝐢𝐧𝐠 𝐟𝐨𝐫 𝐡𝐞𝐥𝐩 𝐰𝐢𝐭𝐡 𝐆𝐫𝐚𝐟𝐚𝐧𝐚." Lets just 𝗱𝗲𝘁𝗲𝗰𝘁 𝗶𝘀𝘀𝘂𝗲𝘀 𝗯𝗲𝗳𝗼𝗿𝗲 𝘂𝘀𝗲𝗿𝘀 𝗳𝗲𝗲𝗹 𝘁𝗵𝗲𝗺, 𝗿𝗲𝗱𝘂𝗰𝗲 𝗱𝗼𝘄𝗻𝘁𝗶𝗺𝗲, 𝗮𝗻𝗱 𝗴𝗮𝗶𝗻 𝗳𝘂𝗹𝗹 𝘃𝗶𝘀𝗶𝗯𝗶𝗹𝗶𝘁𝘆 𝗮𝗰𝗿𝗼𝘀𝘀 𝘆𝗼𝘂𝗿 𝘀𝘁𝗮𝗰𝗸 — not just dashboards, but real reliability. 💡 What I Fix • Systems going down without clear reasons • Slow or failing applications with no root cause visibility • Missing or noisy alerts (alert fatigue) • Blind spots in network traffic and service communication • Security logs with no actionable monitoring • Disconnected tools with no centralized observability • Slow incident response and firefighting mode 🚀 What You Get • 𝗜𝗻𝗳𝗿𝗮𝘀𝘁𝗿𝘂𝗰𝘁𝘂𝗿𝗲 𝗥𝗲𝗹𝗶𝗮𝗯𝗶𝗹𝗶𝘁𝘆 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 (AWS environments, Linux systems, Kubernetes stability) • 𝗔𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗢𝗯𝘀𝗲𝗿𝘃𝗮𝗯𝗶𝗹𝗶𝘁𝘆 (Performance monitoring, logs, tracing, failure detection) • 𝗡𝗲𝘁𝘄𝗼𝗿𝗸 𝗠𝗼𝗻𝗶𝘁𝗼𝗿𝗶𝗻𝗴 & 𝗩𝗶𝘀𝗶𝗯𝗶𝗹𝗶𝘁𝘆 (Latency tracking, traffic insights, service health) • 𝗦𝗲𝗰𝘂𝗿𝗶𝘁𝘆 𝗠𝗼𝗻𝗶𝘁𝗼𝗿𝗶𝗻𝗴 & 𝗔𝗹𝗲𝗿𝘁𝗶𝗻𝗴 (Log-based detection, anomaly signals, audit visibility) • 𝗘𝗻𝗱-𝘁𝗼-𝗘𝗻𝗱 𝗢𝗯𝘀𝗲𝗿𝘃𝗮𝗯𝗶𝗹𝗶𝘁𝘆 𝗣𝗹𝗮𝘁𝗳𝗼𝗿𝗺𝘀 (Grafana, Prometheus, Loki, ELK, OpenSearch, CloudWatch) • 𝗜𝗻𝘁𝗲𝗹𝗹𝗶𝗴𝗲𝗻𝘁 𝗔𝗹𝗲𝗿𝘁𝗶𝗻𝗴 𝗦𝘆𝘀𝘁𝗲𝗺𝘀 (𝗔𝗜𝗢𝗽𝘀) (Anomaly detection, noise reduction, smart escalation) 🧠 Core Stack AWS (EC2, CloudWatch), Linux Prometheus, Grafana, Loki, ELK, OpenSearch Kubernetes, Docker Terraform, Ansible, Bash, Python Jenkins, GitHub Actions, ArgoCD 📈 Results You Can Expect ✔ Faster root cause detection ✔ Fewer incidents and reduced downtime ✔ Clean, actionable alerts (no noise) ✔ Full visibility across infra, apps, network, and security 🎯 CTA If your system is unstable, unclear, or constantly firefighting — I’ll fix it. 𝐌𝐞𝐬𝐬𝐚𝐠𝐞 𝐦𝐞 𝐨𝐫 𝐬𝐞𝐧𝐝 𝐚𝐧 𝐢𝐧𝐯𝐢𝐭𝐞. 𝐈’𝐥𝐥 𝐫𝐞𝐯𝐢𝐞𝐰 𝐲𝐨𝐮𝐫 𝐬𝐞𝐭𝐮𝐩 𝐚𝐧𝐝 𝐭𝐞𝐥𝐥 𝐲𝐨𝐮 𝐞𝐱𝐚𝐜𝐭𝐥𝐲 𝐰𝐡𝐚𝐭’𝐬 𝐛𝐫𝐨𝐤𝐞𝐧 — 𝐛𝐞𝐟𝐨𝐫𝐞 𝐰𝐞 𝐞𝐯𝐞𝐧 𝐬𝐭𝐚𝐫𝐭.
John L.
$70/hr
$0 earned
Available now
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Hi there, I'm a Data Engineer focused on building reliable data pipelines, integrating systems, and delivering clean, analytics-ready data. If you're dealing with messy data, manual processes, or disconnected systems, I can help design and implement solutions that automate workflows and ensure your data is accurate, consistent, and easy to use. What I do: - Build and maintain ETL/ELT pipelines for scalable data processing - Develop and optimize SQL-based data models and reporting layers - Integrate and sync data across systems using REST APIs and webhooks - Design and manage data warehouses (BigQuery, Snowflake) - Automate workflows using Airflow and cloud-based solutions Core stack: Python, SQL (PostgreSQL/MySQL), ETL pipelines, API integrations, BigQuery/Snowflake, Airflow, AWS/GCP Additional experience: - CRM systems (HubSpot, Zoho) and data migrations - Data visualization (Power BI, Tableau) - Third-party integrations (Stripe, Twilio, Shopify) - Automation and data processing across CSV, JSON, and Excel I focus on building systems that are reliable, scalable, and easy to maintain. I'm comfortable working within existing architectures or building new pipelines from scratch, depending on your needs. I'm looking for long-term collaborations where I can contribute consistently and help improve your data infrastructures over time
Eslam T.
$40/hr
100% Job Success
$40K+ earned
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🟣 I'm Full-Stack Odoo-Developer since 2018. 🥇 Top-Rated Odoo-Developer in upwork ✔️I always complete work on time and with a high level of quality. My objectives are ethical practices, quality work and client satisfaction for long term in under budget. 🚀 My Skills: ✅ Customizing Odoo modules and creating new modules from scratch. ✅ Odoo Saas customization and Installation. ✅ Experience in JavaScript/Owl .(e.g POS) ✅ Odoo Integrations with third parties. ✅ Odoo + AI integrations (e.g., ChatGPT, automation workflows). ✅ Odoo + n8n / Zapier / make integrations for advanced workflow automation. ✅ Customizing Reports (Qweb and Xlsx). ✅ Setup Odoo behind Nginx with a SSL certificate (https) . ✅ Integration with other systems. ✅ Integration Shopify / woo commerce. ✅ Integration with CanadaPost / Freightcom shipping services. ✅ Python - XML - JavaScript. 💻𝐂𝐞𝐫𝐭𝐢𝐟𝐢𝐞𝐝 𝐄𝐱𝐩𝐞𝐫𝐭 𝐎𝐝𝐨𝐨 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫
Anil P.
$18/hr
100% Job Success
$200K+ earned
Available now
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🎖 Top-rated Fullstack .NET Developer with 12 years of experience building scalable, high-performance web applications and backend systems. I specialize in ASP.NET Core, C#, MVC, Web API, and SQL Server to deliver robust, secure, and user-friendly solutions tailored to your business needs. In addition to full-stack .NET development, I work with Microsoft 365 and Power Automate to streamline business processes, automate approvals, notifications, document workflows, and system integrations. My focus is helping organizations reduce manual work through efficient automation while maintaining scalable .NET applications.🎖 💡 Key Competencies: ✅ Backend Development (ASP.NET Core & C#): ⚡Building scalable and secure backend systems with ASP.NET Core and C#. ⚡Developing RESTful APIs for seamless frontend-backend communication. ⚡Implementing authentication and authorization using JWT and OAuth. ⚡Real-time functionality with SignalR. ⚡Middleware development for request handling and validation. ✅ Frontend Development (MVC & Razor): 📌Creating dynamic, responsive, and interactive user interfaces with ASP.NET MVC and Razor Pages. 📌Integration with RESTful APIs and third-party libraries. 📌Responsive web design with CSS3, Bootstrap, and JavaScript. 📌Blazor for building interactive web applications with C#. ✅ Database Management (SQL Server): 🌟Designing and optimizing SQL Server databases for performance and scalability. 🌟CRUD operations and complex query implementation. 🌟Data modeling and schema design for efficient data storage. 🌟Integration with Entity Framework Core for streamlined database interactions. ✅ Microservices Architecture: ⚡Designing and implementing microservices for scalable and modular applications. ⚡Using Docker for containerization and deployment. ⚡Implementing message brokers like RabbitMQ or Azure Service Bus for asynchronous communication. ✅ Fullstack Development: 🔥End-to-end development of web applications, from concept to deployment. 🔥Seamless integration of frontend and backend systems. 🔥Deployment on cloud platforms like Azure and AWS. 🔥Version control with Git and collaborative workflows. ✅ Additional Skills: 🌟Testing with xUnit and Moq. 🌟Agile methodologies for project management. 🌟CI/CD pipelines for automated deployment. 🌟Performance optimization for faster load times. 💡 Why Choose Me? ⚡Proven Expertise: Delivered 20+ .NET projects with measurable results. ⚡Scalable Solutions: Build applications that grow with your business. ⚡Client-Centric Approach: Clear communication, timely delivery, and dedicated support. ⚡Future-Proof Development: Write clean, maintainable, and well-documented code. ⚡Continuous Learning: Always updating my skills to stay ahead in the ever-evolving tech landscape. 💡 Technical Stack: 📌Backend: ASP.NET Core, C#, RESTful APIs, SignalR, Entity Framework Core 📌Frontend: ASP.NET MVC, Razor Pages, Blazor, CSS3, Bootstrap, JavaScript 📌Database: SQL Server, Entity Framework Core 📌Tools: Git, Docker, xUnit, Moq 📌Deployment: Azure, AWS 💡 Recent Projects: 🔥Developed a real-time chat application using ASP.NET Core and SignalR. 🔥Built an ecommerce platform with ASP.NET MVC, featuring product filtering, user authentication, and payment gateway integration. 🔥Created a task management tool with Blazor, enabling users to track and manage tasks efficiently. 🔥Designed and deployed a blogging platform with SQL Server for content management and ASP.NET Core for a dynamic backend. 💡 Let’s Work Together! 📌Whether you need a custom web application, a scalable backend, or a dynamic frontend, I’m here to bring your vision to life. Let’s discuss your project and create something extraordinary!
Startbit IT Solutions Pvt. Ltd.
Associated with
Startbit IT Solutions Pvt. Ltd.
$5M+
earned
$15/hr
98% Job Success
$10K+ earned
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I help businesses automate operations, improve customer support, and unlock productivity through AI Agents, RAG systems, chatbots, and workflow automation. Whether you need an AI-powered assistant, customer support chatbot, internal knowledge base, or business automation solution, I can design and deploy a scalable AI system tailored to your needs. What I specialize in: • AI Agents & Autonomous Workflows • RAG Applications • AI Chatbots • OpenAI, Claude & Gemini Integrations • LangChain & LangGraph Solutions • Voice AI Applications • Workflow Automation • Knowledge Base Systems Common problems I solve: • Repetitive manual work → I automate workflows with AI • High support costs → I build intelligent support assistants • Knowledge management issues → I create AI-powered knowledge bases • Slow business processes → I implement AI automation solutions Tech Stack: OpenAI, Claude, Gemini, LangChain, LangGraph, Python, FastAPI, Vector Databases, Pinecone, ChromaDB Why work with me: • Practical AI solutions with business impact • Fast implementation and deployment • Scalable AI architectures • Long-term optimization and support Keywords: AI Automation, AI Agent Developer, OpenAI Developer, Claude AI, Chatbot Developer, RAG Developer, LangChain, LangGraph, Voice AI, Workflow Automation, LLM Engineer
QServices IT Solutions
Associated with
QServices IT Solutions
$1M+
earned
$75/hr
$60K+ earned
Available now
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I build data systems end to end: ETL pipelines, web scrapers, dashboards, and AI-powered search (embeddings, vector databases, RAG). 10+ years in data science and engineering, most of it at Bank of Georgia — Airflow-based ETL and migration pipelines, credit risk models (xgboost), NLP for customer feedback analysis, and full-stack internal tools (Flask, Django, React). Earlier, I optimized 24/7 call distribution for Georgia's national emergency center using queueing theory. On Upwork: 11 completed jobs, 5.0 rating, 800+ hours, $60K+ earned. Projects include a kNN vector search system, a large-scale hashing & clustering pipeline (AWS, Postgres), real-time trading dashboards (Dash, Bokeh), and Selenium-based data collection. A client wrote: "He demonstrated his expertise in using Python and Selenium for real-time data collection... His user interface design was intuitive." What I take on: • Data pipelines & ETL — Airflow, Python, Postgres, AWS • Web scraping & monitoring — Selenium/Playwright, scheduled jobs with alerts • Dashboards — Dash, Bokeh, real-time data visualization • AI search & retrieval — vector databases, embeddings, RAG over your documents or data MSc in Mathematics. I write simple, explicit code that someone else can maintain — no clever abstractions. I respond fast and deliver working systems, not prototypes.
$30/hr
100% Job Success
$30K+ earned
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Goran B. has worked .
iOS, watchOS, and macOS developer with 5+ years of Swift/SwiftUI experience, complemented by extensive C and system-level programming knowledge. Built complete apps using SwiftData, SQLite, CoreData, CoreBluetooth, CoreMotion, and AudioKit. Experienced in real-time tracking on iPhone and Apple Watch, background processing, and communication between watchOS and iOS. Examples: - Audio synthesis and processing using AudioKit - Data persistence using SQLite and SwiftData - Real-time fitness/activity tracking with CoreMotion and HealthKit - Async networking, WebSockets, REST APIs - SwiftUI + UIKit as needed for complex UIs - Background tasks, concurrency with async/await, GCD Delivered stable, efficient apps for personal use and niche utilities across Apple platforms. Focused on practical, high-performance codebases and full-stack app delivery from prototype to release.