Freelance Backend Developer

Job not on LinkedIn

🔥 0 minutes ago

🇺🇸 United States – Remote

⏳ Contract/Temporary

🟠 Senior

🔴 Lead

🔙 Backend Engineer

👻 Ghost score 12%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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Transmission

WebsiteLinkedInAll Job Openings

201 - 500 employees

Founded 2013

🤝 B2B

📣 Marketing

💼 Consulting

B2B • Marketing • Consulting

Transmission is a global B2B marketing agency that combines human expertise and AI to deliver integrated go-to-market, brand, and demand generation services focused on driving measurable business growth. The agency offers growth consulting, brand strategy, go-to-market planning, integrated creative and content, digital experiences, paid media, ABX/ABM, data and analytics, and demand conversion services. Transmission operates from multiple global offices, employs 250+ people, and emphasizes secure and responsible AI through ISO/IEC 27001:2022 and ISO/IEC 42001:2023 certifications. It positions itself as a consultative partner for enterprise and mid-market B2B clients, with industry-recognized awards and a focus on measurable commercial outcomes.

📋 Description

• Review current AWS staging and production architecture, configurations and deployments • Assess ECS/Fargate, networking, application load balancing, IAM, Cognito, S3, KMS and Secrets Manager • Evaluate environment isolation, permissions, authentication, authorization and data security • Identify vulnerabilities, misconfigurations, security gaps and infrastructure risks • Recommend and implement remediation, prioritizing critical issues before broader production rollout • Review AWS CloudFormation configurations and infrastructure deployment practices • Evaluate readiness for increased concurrent users and application workloads • Assess API performance, database connections, application resource utilization and scaling configurations • Conduct or support load and stress testing to identify performance bottlenecks • Review application logging, CloudWatch monitoring, alerting and incident-response capabilities • Evaluate backup, recovery, resilience and deployment/rollback processes • Ensure staging environments adequately represent production behavior • Develop and improve backend functionality using Python and FastAPI • Troubleshoot and optimize REST APIs and third-party integrations • Support PostgreSQL, Snowflake and AWS-hosted data integrations • Develop reliable background processing, scheduled jobs and asynchronous workflows • Support integration of AI/LLM services with the existing application • Collaborate with the AI developer and data scientists to complete Phase 2 functionality • Document changes and provide technical knowledge transfer

🎯 Requirements

• 7+ years of software engineering experience, including senior-level backend development • Extensive hands-on experience managing and troubleshooting production AWS environments • Strong Python and FastAPI development experience • Demonstrated expertise with AWS ECS, Fargate, IAM, VPC networking, ALB, CloudWatch, Cognito and S3 • Experience assessing cloud infrastructure security and remediating vulnerabilities • Proven experience with application scalability, load testing and production performance optimization • Strong SQL and PostgreSQL experience • Experience with Docker, CI/CD, GitHub Actions and infrastructure as code • Ability to independently review an existing technical architecture and implement improvements • AWS Certified Solutions Architect – Professional, AWS Certified DevOps Engineer – Professional, and AWS Certified Security – Specialty are highly preferred • Experience with AWS CloudFormation, Snowflake, Prefect, asynchronous/background processing, AI-powered applications, third-party LLM APIs, secure multi-tenant SaaS applications, security assessments, penetration-test remediation and production launch readiness are highly preferred