Senior Python Backend Engineer, Financial Systems

BriteCore; Argentina; A distancia; ARS 98.533.000 - 166.748.000; A tiempo parcial

Descripción de la vacante

BriteCore is seeking a driven Senior Python Backend Engineer for a long-term remote IC role based in Argentina or Brazil. You’ll build AI-powered backend services, APIs, and financial workflows, plus scale multi-tenant systems for real-money processing.

Strong Python, Django, SQL, and cloud experience are essential. You’ll work with Claude/Codex/Cursor tools, Docker, and AWS to ship production-grade features, with an emphasis on rapid iteration and reliability.

Formación

• 5+ years of Python web development, especially with financial systems.
• 3+ years with SQL databases (MySQL, PostgreSQL).
• 3+ years SaaS product development with cloud-based solutions.
• 3+ years hands-on with Django.
• 2+ years building and consuming APIs for financial transactions.
• Daily use of AI coding tools such as Claude, Cursor, Codex.
• Ability to direct AI agents on multi-file, long-horizon tasks.
• Advanced math for financial modeling, algorithms and data processing.
• Frontend experience with Vue.js or React.
• Docker and AWS experience; strong communication skills.

Responsabilidades

• Push production AI agents into platform flows; build Python services.
• Develop integration backbone: payments, identity, e-signature, real-time data.
• Create rules engines and config runtime to enable product customization.
• Migrate entire companies to the platform: importer pipelines, batch reconciliation.
• Scale multi-tenant batch systems moving money nightly; ensure data integrity.
• Design public APIs for customer ecosystem; AI agents as primary consumers.
• Build financial systems: billing, payouts, refunds and revenue cycles.

Conocimientos

Python

Django

API design

SQL databases

SaaS development

Cloud (AWS)

AI tooling

Docker

React/Vue

Communication

Educación

Bachelor’s Degree in Computer Science

Herramientas

MySQL

PostgreSQL

Docker

AWS

Claude/Codex/Cursor

LangChain

LangGraph

LangFuse

OpenRouter

Descripción del empleo

AI for MakersWe're Makers.

In 2025, we set out to build something most teams only talk about. We embedded AI so deeply into our development workflows that we were over 10x more productive. Being on the bleeding edge isn't a strategy here. We hack on AI tools because we can't help it. It's how we're wired. We don't talk about the future of engineering. We're living it.

Logistics

This is a fully remote based role, however candidates must be located in Argentina or Brazil. Note: this is a long-term Independent Contractor position. Please submit your resume in English. Our tools & stack- Python, MySQL, AWS - Claude, Codex, Cursor, Copilot, LangChain, LangGraph, LangFuse, OpenRouter, FastMCP

What you'll do

• Push production AI agents into the platform’s most complex flows, and build the Python services and MCP servers that orchestrate them: tool layer, context handling, model routing through OpenRouter
• Build the integration backbone the platform runs on: payments, identity, e-signature, real time data, at the latency live decisions demand
• Build out the rules engines and configuration runtime that turn the platform into a product factory, with customers shipping entirely new products on top of us without us touching the code
• Migrate whole companies onto the platform: importer pipelines, batch reconciliation services, zero data loss
• Build and scale the multi-tenant batch systems that move real money every night: settlement runs, document pipelines, async workers, where every customer’s data has to stay correct under load
• Design the public APIs the entire customer ecosystem runs on, with AI agents as first-class consumers and the contracts that let new endpoints ship at speed
• Build the financial systems behind every dollar that moves through the platform: billing, payouts, commissions, refunds, every cycle

What you'll bring

• Bachelor’s Degree or higherin Computer Science or a related field - 5+ years of experience in Python web development, particularly with financial systems or modules- 3+ years with SQL databases (e.g., MySQL, PostgreSQL) - 3+ years of SaaS product development, including cloud based solutions - 3+ years of hands on experience with Django or another Python framework - 2+ years of proven experience building and consuming APIs for financial transactions - Daily, deliberate use of agentic AI coding tools such as: Claude, Cursor, Codex - Proven ability to direct AI agents on multi file, long horizon tasks - Advanced mathematical skills in financial modeling, algorithms, and data processing - Hands on experience with frontend frameworks like Vue.js or React - Professional experience working with Docker for containerization and AWS - Excellent verbal and written communication skills

Bonus points

• 2+ years of experience working at a scaling startup
• Experience with spec driven development: using AI to generate tests, scaffolding or architecture from requirements
• Hands on experience building production AI agents or multi-step LLM pipelines using LangChain, LangGraph, or equivalent orchestration frameworks
• Proven use of Agent Teams in Claude Code, multi agent orchestration via Codex, or similar parallel agentic workflows
• Experience working in the fintech or financial services vertical

We used tokensThis isn’t your typical AI generated job description

What did we do different?

Other companies: Basic AI Us: Claude Cowork (Opus 4.7)

Why? The same reason you’re still reading the job description Here was our first prompt I need to use Cowork to update a job description for a Senior Python Backend Engineer role. The current job description is in a folder on my desktop called "Job Description" I want Cowork to pull from three Slack channels: #eng-general-int, #product-general-int and #ai-for-makers - plus any design docs from the last three months, to understand what we've actually been shipping. Then update the job description based on what it learns Final output should be a Google Doc. Help me write the Cowork prompt [Our recruiter wrote this prompt, not an engineer]

Life at BriteCore

We take pride in our dynamic, diverse team, unified by shared values of community, integrity, grit and impact.

We love what we do and the people we do it with, which is why we welcome every individual, provide them with equal opportunity irrespective of their race, color, national origin, religion, age, gender identity, sexual orientation, veteran, disability or any other legally protected rights that one has.