Hire the Best Scala Developers

I am a Software Engineer with over a decade of experience in Backend development, CRUD, Web, RESTful APIs, Unit Testing, and Scala. I am dedicated to creating scalable applications that help my clients stand out. I am currently seeking challenging projects and opportunities to utilize my problem-solving skills and experience to help businesses achieve their goals in both technology and business domains. If you value well-designed, impactful software systems delivered efficiently, I am the right person for you. Technologies and platforms I am proficient in include Scala, Play Framework, Akka, RDBMS, NoSQL, ZIO, HTTP4S, Cats Effect, Monix, Kafka, AWS, Apache Spark, RAG, Gen AI, LLMs, Claude, Codex, and Functional Programming.

✅ 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.

𝗜 𝗗𝗢𝗡'𝗧 𝗝𝗨𝗦𝗧 𝗖𝗥𝗘𝗔𝗧𝗘 𝗔𝗜 𝗩𝗜𝗗𝗘𝗢𝗦. 𝗜 𝗖𝗥𝗘𝗔𝗧𝗘 𝗨𝗚𝗖 𝗔𝗗𝗦, 𝗔𝗜 𝗔𝗩𝗔𝗧𝗔𝗥 𝗩𝗜𝗗𝗘𝗢𝗦 & 𝗖𝗢𝗠𝗠𝗘𝗥𝗖𝗜𝗔𝗟 𝗖𝗢𝗡𝗧𝗘𝗡𝗧 𝗧𝗛𝗔𝗧 𝗗𝗥𝗜𝗩𝗘𝗦 𝗥𝗘𝗦𝗨𝗟𝗧𝗦. If you're looking for an AI Video Creator who can produce high-converting UGC ads, AI avatar videos, ecommerce commercials, product videos, and short-form content that stops the scroll, you're in the right place. I help ecommerce brands, Shopify stores, SaaS companies, agencies, coaches, and creators turn ideas into engaging AI-powered content designed to increase visibility, engagement, and conversions. 🎯 SERVICES 🔹 AI UGC VIDEO ADS • AI UGC Ads • Product Demo Videos • Product Review Videos • Testimonial Style Ads • Selfie Style UGC Content • TikTok Video Ads • Meta & Facebook Ads • Instagram Reels • YouTube Shorts • Direct Response Video Ads • Ecommerce Product Videos • Shopify Video Ads 🔹 AI AVATAR VIDEOS • HeyGen Videos • AI Spokesperson Videos • Talking Head Videos • AI Influencer Videos • Corporate Training Videos • Course Videos • Educational Content • Multilingual AI Videos • Lip-Sync Videos • AI Voiceover Content 🔹 AI VIDEO CREATION • Text-to-Video Production • Image-to-Video Production • AI Commercial Videos • Product Marketing Videos • SaaS Explainer Videos • Brand Storytelling Videos • Social Media Content • Promotional Videos • AI Music Videos • Cinematic Short-Form Videos 🔹 SHORT-FORM CONTENT • TikTok Content • Instagram Reels • YouTube Shorts • Viral Video Editing • Hook-Based Content • Retention-Focused Editing • Social Media Marketing Videos ⚙️ TOOLS I USE AI Video: Seedance 2.0, Higgsfield, Veo 3, Kling AI, Runway, Pika Labs, Luma AI AI Avatars: HeyGen, Synthesia, Colossyan AI Voice: ElevenLabs, PlayHT AI Images: Midjourney, Flux, Leonardo AI, GPT Image, Nano Banana Pro Editing: Adobe Premiere Pro, After Effects, DaVinci Resolve, CapCut Pro 🧠 WHY CLIENTS WORK WITH ME Most creators focus on generating videos. I focus on creating content that performs. I combine: • UGC Ad Strategy • Direct Response Marketing • Conversion Psychology • Hook Engineering • Retention Editing • AI Prompt Engineering • Creative Storytelling Every project is built to: ✔ Capture Attention Fast ✔ Increase Watch Time ✔ Improve Engagement ✔ Generate More Clicks ✔ Drive More Sales ✔ Strengthen Brand Awareness 💼 WHO I WORK WITH • Ecommerce Brands • Shopify Stores • SaaS Companies • Marketing Agencies • Course Creators • Coaches & Consultants • Beauty Brands • Health & Wellness Brands • Personal Brands • Content Creators If you're looking for cheap content, I'm probably not the right fit. If you're looking for premium AI video content designed to grow your brand and improve results, let's talk. 📩 SEND ME A MESSAGE WITH: • Your product or service • Your target audience • Your platform (TikTok, Meta, Instagram, YouTube) • Your goals I'll help you build a content system that combines AI video, UGC, avatars, and performance marketing to help your brand stand out. KEYWORDS AI Video Creation AI Video Generation AI Content Creation AI Filmmaking AI Video Editing AI Animation Generative AI AI Storytelling AI Commercial Production AI Marketing Content AI Video Creation AI Video Generation AI Content Creation AI Filmmaking AI Video Editing AI Animation Generative AI AI Storytelling AI Commercial Production AI Marketing Content UGC Video Creation AI UGC Videos UGC Advertising Creator Style Ads User Generated Content TikTok UGC Ads Instagram UGC Content AI Influencer Marketing Product Demo Videos Direct Response Advertising TikTok Video Ads Instagram Reels YouTube Shorts Short Form Video Viral Video Creation Social Media Videos Vertical Video Production Reels Video Editing Video Marketing Performance Creative Ecommerce Video Ads Shopify Video Ads Amazon Product Videos Product Advertising Product Marketing Product Launch Videos DTC Advertising Conversion Focused Ads Sales Video Creation Video Sales Letters Seedance 2.0 Higgsfield AI GPT Image GPT Image 2 Kling AI Veo 3 Google Veo Sora AI Runway ML Pika Labs Commercial Video Production Brand Storytelling Cinematic Video Production Video Commercials Luxury Brand Advertising Creative Direction Visual Storytelling Digital Advertising Branded Content Creative Production Motion Graphics 3D Animation Product Animation Character Animation Cinematic Animation AI Motion Design Visual Effects Video Compositing Storyboard Creation Scene Development Performance Marketing Meta Ads Creative Facebook Video Ads Instagram Ads TikTok Marketing Creative Strategy Ad Creative Testing Conversion Optimization Customer Acquisition Marketing Automation Real Estate Video Luxury Real Estate Marketing Skincare Advertising Beauty Product Videos Fashion Marketing Travel Content Creation Tourism Marketing Fitness Advertising Supplement Marketing SaaS Marketing Prompt Engineering AI Prompt Design Creative AI Workflows Character Consistency Image to Video Cinematic Editing AI Avatars

I'm Huanqing Zhu, and you can call me Fusion. With over 10 years of hands-on Java development experience—including 6 years dedicated to big data processing and visualization—I’ve built my expertise by staying rooted in frontline coding, even as my responsibilities have grown. A key pillar of my technical toolkit is ‌6 years of production-grade Rust development experience‌, complemented by proficiency in Java, Scala, JavaScript, HTML5, and a full stack of big data and cloud-native technologies: Apache Spark, Hadoop, Hive, Flume, HBase, Storm, Kafka, DataX, ECharts, Docker, Kubernetes, and Linux. What sets me apart is that I’ve never stepped away from writing production code, even as I’ve taken on leadership and architectural roles: As a ‌hands-on Big Data Developer‌, I’ve built robust data ingestion utilities (including the open-source DataXServer on GitHub) and real-time page click analytics systems, directly coding pipelines to pull data from RDBMS, NoSQL databases, and file storage into production environments. As a ‌Big Data Architect‌, I’ve led platform design while still contributing core code, using Hadoop, Spark, Flink, and ElasticSearch to build scalable data infrastructure—no abstract planning here; I’ve written the critical components that power these systems. As a ‌Rust Specialist‌, my 6 years of experience spans building high-performance, low-latency systems. I’ve used Rust to optimize data processing pipelines, cut latency by up to 40% in high-throughput scenarios, and deliver systems that run 24/7 with zero critical errors. As a ‌Team Leader‌, I’ve managed full-stack teams (Java, front-end, QA, operations) while still pairing with developers on complex code reviews and contributing to high-priority features, ensuring I stay connected to the day-to-day challenges of software delivery. I also bring deep experience in microservices architecture and cloud-native containerization, and my cross-language expertise lets me bridge gaps between Java-based enterprise systems and Rust-powered high-performance components. If you’re looking for a professional who combines strategic vision with the grit to deliver production-ready code—someone who can architect a system, and write the Rust or Java code that makes it run—I’m the candidate for you. Thank you for reviewing my profile. I’m eager to discuss how my hands-on experience can add value to your team.

Hands on Data architect & Lead data engineer, with 12+ years of experience in designing & building end to end high velocity, high volume peta byte real time & batch data platforms from scratch on clouds & on-prem. Kubernetes native development from the beginnig. I develop distributed & scalable back-end systems using using languages like goLang, Rust & python. Lately Started working on integration of AI, RAG, MCP Servers & MLops Platforms into data platforms. Developed self hosted llms applications using Ollama and llm observability using langfuse. Mordenize existing data platforms with AI first approach. Hybrid semantic mapping layers or unstructured and structured data using heuristics, memory and LLMs. Built & worked on peta byte scale streaming, batch data & AI platforms in top companies. An open source contributor to data technologies & products like Airbyte etc. Love working on database internals, performance and optimizations. I have experience working with telemetry data, payments data, video data, sports data, eCommerce data & affiliate marketing data, logs data, clickstream data. Skill Set: Big Data Technologies: Spark, Kafka, Flink, Presto, Dremio, Hudi, Deltalake Data warehouses: Snowflake, Druid, Clickhouse, Redshift, SingleStore(Memsql), Quest Databases: Postgres, Mysql, Cassandra, DynamoDB, DuckDB Programming languages: Golang, Python, Rust, Scala, Java Visualization: Tableau, Apache Superset, Zoomdata Data Technologies - Airbyte, Fivetran, Dagster, Airflow, Nifi, Kubeflow, ElasticSearch, OpenSearch Platforms: Databricks, Snowflake, Cloudera, Supabase, Aiven Ops: Kubernetes, Docker Cloud: AWS, GCP, Azure

A working demo and a system that survives production are two very different things. I build the second kind. Over a decade of backend engineering and 70+ completed projects on Upwork. I run Datum Brain, a software and AI engineering company, so you get one senior engineer accountable end to end, with a team behind him when the work needs it. We ship Go microservices, data pipelines, and LLM systems for FinTech, SaaS, EdTech, and AdTech clients. Recent work: 🛡 Real-time ad fraud detection (TrueAudience) High-concurrency Go backend that scores ad traffic to catch bots before advertisers pay. 80M+ events, under 20ms decisions. Go, TimescaleDB, real-time pipelines. 🏦 Go microservices for an EMI and payments platform (Zolvat) Ledger logic, payment flows, and service orchestration for an installment payments platform. Go, microservices, PostgreSQL. 🎥 WebRTC proctoring infrastructure (Meazure / Examity) Real-time media and session orchestration for thousands of concurrent exam sessions at one of the largest US proctoring providers. Go, WebRTC, LiveKit, NATS. 📊 Big data pipeline optimization (Nike) Cut processing time and compute cost on large PySpark workloads. PySpark, AWS. 📄 Document intelligence platform (Centrum AI) OCR and RAG pipeline that turns unstructured documents into structured, queryable data with human review. Python, FastAPI, LangChain, RAG. What I work with: Backend: Go, Python, FastAPI, gRPC, REST, PostgreSQL, TimescaleDB, Redis, NATS, Kafka Data: PySpark, ETL pipelines, data quality frameworks, AWS, GCP Real-time: WebRTC, LiveKit, event streaming, high-concurrency systems AI and LLM: LangChain, LangGraph, RAG, multi-agent systems, OpenAI, Claude, evals Infra: Docker, Kubernetes, CI/CD, nginx How I work: I scope before I quote, so you know what you are getting and when. I flag risks early instead of at the deadline. Production-ready means tested, documented, monitored, and handed over properly. Good fit if you need something that runs in production and not a proof of concept, you want one senior engineer accountable end to end, and you value clear communication and honest scoping. Not a fit if you are shopping purely on hourly rate, or the spec changes daily and nobody owns decisions. If your backend needs to handle real load, or your data or AI work needs to go from demo to product, send me a message.