Senior Backend Software Developer

Leo Madeiras

. Develop and maintain highly critical backend services in a financial transaction environment, ensuring availability, consistency, and traceability .

Posted 9/18/2026full-timeBarueri • BrazilSeniorWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in backend development with Python and Node.js, alongside advanced SQL and data modeling skills. Proficient in AWS serverless architecture and REST API integrations, with a strong focus on payment systems and compliance with financial regulations.

Highest-signal resume keywords

Backend Development With PythonSQL And Data ModelingAWS Serverless ArchitectureREST API IntegrationsPayment Systems Knowledge

ATS Keywords

Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills

PythonNode.jsSQLData ModelingAWSServerless ArchitectureREST APIEvent-Driven ArchitectureGitCI/CD

Soft Skills

Independent Problem SolvingClear Communication

Tools & Technologies

AWS LambdaAPI GatewayDynamoDBRDSStep FunctionsGCPBigQuerySAPViaSoftRetool

Industry Keywords

Financial Transaction EnvironmentPayment MethodsFraud PreventionCentral Bank Of Brazil RegulationsFinancial Reconciliation

Tech Stack

Tools & technologies

AWSBigQueryDynamoDBGoogle Cloud PlatformJavaScriptNode.jsPythonSQL

About the role

Key responsibilities & impact

Develop and maintain highly critical backend services in a financial transaction environment, ensuring availability, consistency, and traceability
Technically lead product roadmap initiatives, from refinement with the Product Owner through production deployment
Design and evolve integrations with partners and providers across the payments ecosystem, including acquirers, gateways, registrars, processors, fraud prevention providers, and ERPs
Define and review architecture decisions, including data modeling, API contracts, resilience strategies, idempotency, and failure handling
Support LMP's proprietary systems by investigating incidents and addressing root causes
Implement observability, monitoring, and alerting for services owned by the squad
Review code, provide technical support to mid-level and junior developers, and promote engineering best practices
Collaborate with Product, Operations, Finance, Risk, and Compliance teams, translating business needs into technical solutions

Requirements

What you’ll need

Strong experience in backend development with Python and/or Node.js
Advanced knowledge of SQL and data modeling in relational databases
Experience with non-relational databases
Experience with AWS and serverless architecture, including Lambda, API Gateway, SQS/SNS, DynamoDB, RDS, and Step Functions or equivalent services
Experience with event-driven architecture
Experience with REST API integrations and asynchronous processing
Experience with Git, CI/CD, automated testing, and code review practices
Ability to work independently on ambiguous problems
Ability to break down complex initiatives and clearly communicate technical decisions
Preferred: experience in payment methods, acquiring, sub-acquiring, or payment institutions
Preferred: knowledge of PIX, payment arrangements, receivables registration (CERC), settlement, financial reconciliation, or fraud prevention
Preferred: familiarity with Central Bank of Brazil regulations applicable to payment institutions
Preferred: experience with GCP/BigQuery, data pipelines, and BI tools
Preferred: experience integrating with retail ERPs (SAP, ViaSoft) and low-code tools (Retool)

Benefits

Comp & perks

Profit-Sharing Program (PLR), based on the company's net profit and individual performance
Corporate Restaurant / Meal Voucher
Food Allowance via card
Medical Insurance, with 100% of the employee's plan and 100% of the plan for children up to 16 years old covered
Dental Insurance, with the option to include dependents and additional beneficiaries
Life Insurance
Pharmacy Benefit, with discounts on medications
Wellhub, providing access to gyms and wellness activities starting in the second month
Transportation Allowance / Parking
Online course platform for professional and personal development
School Supplies Kit for employees' children between 4 and 16 years old
Maternity Kit
Christmas Kit, including a family hamper and toys for children up to 12 years old
Partnerships and discounts with educational institutions, leisure providers, and travel companies