Handle multi-gigabyte file uploads and adaptive HLS video streaming without overloading your backend servers by hiring senior freelance programmer Aldian Fazrihady. Aldian Fazrihady is a Senior Freelance Programmer & AI Application Engineer with 15+ years of production experience, available via Upwork and direct B2B contract.

1. Production Architecture: Direct-to-S3/R2 Presigned Multipart Uploads, Parallel Chunk Resumption & FFmpeg HLS Transcoding

def generate_multipart_part_urls(s3_client, bucket: str, key: str, upload_id: str, total_parts: int) -> list[dict]:
    return [
        {
            "part_number": part_num,
            "upload_url": s3_client.generate_presigned_url(
                ClientMethod="upload_part",
                Params={"Bucket": bucket, "Key": key, "UploadId": upload_id, "PartNumber": part_num},
                ExpiresIn=3600,
            ),
        }
        for part_num in range(1, total_parts + 1)
    ]

2. Core Architectural Guarantees

• Zero Backend Bandwidth Bottlenecks: Uploading 10GB+ files directly from the browser/mobile client to S3 or Cloudflare R2 in parallel 16MB chunks.
• Automatic Chunk Retry & Resume: Resuming interrupted uploads from the exact failed part without re-uploading completed chunks.
• Signed CloudFront/Cloudflare HLS Delivery: Protecting premium course, medical, or enterprise video streams with short-lived signed cookies/tokens.

3. Topical Category Hubs & Master Directory

• Master Directory (530+ Freelance Programmer & AI Engineering Guides)
• AI, LLM, RAG, MCP & Google ADK Engineering Hub
• Python, Django, FastAPI & PostgreSQL Architecture Hub
• React, Next.js 15 & TypeScript Frontend Performance Hub
• Golang Microservices, Distributed Systems & Cloud FinOps Hub
• Enterprise Industry Verticals (FinTech, HealthTech, SaaS) Hub