Senior Software Engineer

Fraud Deflect; Londrina; Presencial; BRL 160.000 - 200.000; Tempo integral

Resumo da oferta

A financial technology company located in Brazil is seeking a Senior Software Engineer to own and evolve critical payment services. The role requires expertise in Python backend development and proven experience with REST APIs. You'll partner with clients and internal teams, leading project execution and ensuring integrations are reliable. Candidates should have a strong understanding of fintech workflows, especially chargebacks and disputes, and be comfortable working in a DevOps environment.

Qualificações

• Strong typing, testing, concurrency fundamentals, and performance debugging.
• Can interface with external stakeholders to clarify requirements.
• Drive the full lifecycle from discovery to operation.

Responsabilidades

• Lead project execution including technical design and delivery coordination.
• Build and operate REST APIs in Python.
• Own API integrations with external partners.

Conhecimentos

Expert Python backend engineer

Proven REST API development experience

Strong data structures and API data modeling skills

Experience in payments/fintech workflows

Client-facing technical communication

Comfortable on Linux servers

Ferramentas

Docker

Kubernetes

Terraform

Amazon Web Services

Descrição da oferta de emprego

Company : Fraud Deflect Role : Senior Software Engineer

Language : Native / fluent English. Resumes in English.

About the role

Own and evolve critical payments / back-office services end-to-end : design, build, ship, and operate API-first Python systems that automate disputes / chargebacks and related workflows. You'll partner directly with clients and internal teams to translate business rules into reliable integrations, services, and data models— leveraging Linux, with a pragmatic DevOps mindset.

Responsibilities

Lead project execution : technical design, implementation plans, code reviews, and delivery coordination.

Build and operate REST APIs in Python (versioning, idempotency, auth, webhooks, integrations).

Own API integrations with external partners / processors : onboarding, validation, retries, error handling, and SLAs.

Implement complex payments / chargeback business logic from requirements and client workflows; ensure correctness and auditability.

Model API / domain data with strong data-structure fundamentals (schemas, invariants, normalization / denormalization tradeoffs).

Meet and maintain contact directly with clients.

Operate services on Linux : deployments, debugging, performance tuning, incident response, and reliability improvements.

Contribute to DevOps practices : CI / CD pipelines, safe rollouts, observability (logs / metrics / traces), and operational automation.

Required

Expert Python backend engineer (3.12+ preferred) : strong typing, testing, concurrency fundamentals, and performance debugging.

Proven REST API development experience (design + production operations), including integrations and webhooks.

Strong data structures and API data modeling skills (clear contracts, backward compatibility, validations).

Experience implementing business logic for payments / fintech workflows, especially disputes / chargebacks and reconciliations.

Comfortable on Linux servers with a DevOps mindset (deploy / run / debug production services; automate operational work).

Client-facing technical communication : can interface with external stakeholders to clarify requirements, diagnose issues, and drive resolutions.

Ownership mentality and interest in leadership : drive the full lifecycle from discovery → design → build → operate.

Nice to have

Containerization / orchestration (Docker / Kubernetes), IaC (Terraform), and cloud-native operations on Amazon Web Services.

Event-driven / workflow systems (SQS / Kafka / Kinesis; Airflow / Prefect / Dagster).

Security / compliance exposure (PCI, SOC 2) and observability tooling at scale.

How to apply

Send an English resume and links to relevant work (repos, API docs, architectural notes, or write-ups) showing :

Python backend API development + real-world API integrations

Payments / disputes / chargebacks or similarly complex workflow automation