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C2S | Contact2sale Tech Stack

Lead management platform for real estate, automotive, and insurance sales teams

IT Services and IT Consulting São Paulo 51–200 employees Founded 2015 Privately Held

C2S operates a lead-management system designed for high-velocity sales environments in real estate, automotive, and insurance. The stack—Python/FastAPI/Django, Kafka, RabbitMQ, PostgreSQL, plus Customer.io and WhatsApp integration—reflects a company prioritizing real-time lead routing and multi-channel outreach. Current hiring skews heavily toward operations and marketing (8 of 10 roles), while only one engineering position is open; combined with active projects in SRE, observability, and performance reliability, this suggests C2S is optimizing existing infrastructure rather than expanding core product.

Tech Stack 23 technologies

Core StackCustomer.io Python FastAPI Django Flask Celery RabbitMQ Kafka Docker AWS Ruby on Rails Redis PostgreSQL MySQL HubSpot Google Analytics WhatsApp RSpec Sidekiq OpenSearch RD Station Google Meta

What C2S | Contact2sale Is Building

◆Challenges

Performance and reliability
Sre area development
Lead funnel bottlenecks

▲Active Projects

Product positioning and messaging strategy
Digital campaigns
Inbound demand generation
Ai project
Sre area development
Observability and monitoring
Performance and reliability improvement
Special campaigns
New tests

Hiring Activity

Accelerating10 roles · 5 in 30d

Department

Ops

5

Marketing

3

Engineering

1

Sales

1

Seniority

Intern

3

Senior

3

Manager

2

Junior

1

Mid

1

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About C2S | Contact2sale

C2S is a Brazilian lead-management platform founded in 2015, headquartered in São Paulo. The product targets sales teams in real estate, automotive, and insurance, enabling rapid lead assignment and response across multiple communication channels (WhatsApp, email, phone). The company integrates with HubSpot and RD Station for CRM workflows, and uses Customer.io for automated outreach. With 51–200 employees and all current hiring concentrated in Brazil, C2S operates as a regionally focused vendor. The organization is currently addressing performance and reliability challenges while building out SRE and observability capabilities.

HeadquartersSão Paulo

Company Size51–200 employees

Founded2015

Hiring MarketsBrazil

Frequently Asked Questions

What tech stack does C2S use?

C2S uses Python, FastAPI, Django, and Flask for backend services; Celery, RabbitMQ, and Kafka for async and event streaming; PostgreSQL and MySQL for databases; Docker and AWS for infrastructure; Customer.io for messaging and HubSpot for CRM integration.