Senior Full Stack Engineer, Backend-heavy

About Virtasant

Virtasant is a global technology services company with a network of over 4,000 technology professionals across 130+ countries. We specialize in cloud architecture, infrastructure, migration, and optimization, helping enterprises scale efficiently while maintaining cost control.

Our clients range from Fortune 500 companies to fast-growing startups, relying on us to build high-performance infrastructure, optimize cloud environments, and enable continuous delivery at scale.

About the role

Our client is a US-based technology company focused on driving the next generation of vehicle and mobile technologies.

For them, we are hiring a Senior Backend-Heavy Full Stack Engineer to join a team responsible for managing customer profile systems, secure data integrations, and high-volume backend services.

This role is 90% backend-focused, with light frontend involvement when required.

The team operates in a highly secure, data-sensitive environment and builds event-driven systems handling large-scale data processing.

If you're more of a 50/50 (Frontend and Backend) kind of fullstacker, strong in React+Node (or Python) and AWS, and you also live in Latin America, please check another role we have here - https://virtasant.teamtailor.com/jobs/7285272-senior-full-stack-engineer-50-50-fe-be-latam-est-hours

What You’ll Be Doing

• Designing and building Python-based backend services

• Developing APIs using FastAPI

• Designing and maintaining event-driven architectures

• Managing large-scale data ingestion and ETL workflows

• Working with MongoDB

• Deploying and maintaining AWS serverless services

• Supporting secure B2B API integrations

• Improving reliability, performance, and system scalability
  

What Success Looks Like (6 Months)

• You deeply understand the client profile and integration architecture

• You independently design and ship backend features

• You improve data flow reliability and performance

• You demonstrate strong production ownership

• You contribute to architecture and system improvements
  
  

Required Experience

Backend (Critical)

• Strong experience with Python

• Hands-on experience with FastAPI

• Deep understanding of event-driven architecture

• Experience handling high-volume data systems
  

Databases & Data

• Strong experience with either MongoDB or DynamoDB

• Experience designing schemas and optimizing queries

• Familiarity with ETL design patterns
  

Cloud & Infrastructure

• Experience with AWS (Lambda, serverless architecture)

• Experience with Apache Airflow (preferred)

• Understanding of monitoring and observability
  

Frontend (Light Requirement)

• Some experience with React

• Comfortable making minor frontend updates when needed

Nice to haves

• Working knowledge of Lexbots, Bedrock, Eventbridge, SNS/SQS, logging frameworks and monitoring tools (Datadog/Splunk)

• Working knowledge of OpenSearch.

• Familiarity with Apache Airflow.

Security & Compliance Awareness

This role operates in a data-sensitive environment. Candidates must:

• Understand API security best practices

• Think carefully about data access control

• Build systems with compliance and security in mind
  

Who Thrives Here

• Backend-first fullstack engineers

• Systems thinkers

• Comfortable working with large datasets

• Proactive and solution-oriented

• Strong sense of production accountability

Our recruitment process

• Recruiter Screen (30 min)

• Technical Interview (30 min)

• Client's Technical Round - two one-hour interviews, both on the same day

• Client Comms & Collab Round - two 30-minute interviews, both on the same day

We strive to move efficiently from step to step so that the recruitment process can be as fast as possible.

What we offer

• Totally remote, full-time (40h/week)

• EST work hours

• Long-term, solid independent contractor agreement

• Payment in USD, by-weekly or monthly - your choice.