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Senior Software Engineer
Job summary
A leading fintech company in Aracaju, Sergipe, is looking for a Senior Software Engineer to design and operate API-first Python systems. You will lead technical execution and work with clients to enhance payment processes. Successful candidates will have a strong background in REST API development, Python, and a proven ability to handle complex workflows. This role provides an opportunity for ownership and leadership within the company.
Qualifications
- 3+ years of experience in Python backend engineering with a focus on strong typing and performance debugging.
- Proven experience in REST API development, including production operations.
- Familiarity with payments and fintech workflows is a plus.
Responsibilities
- Lead technical designs and implementation plans.
- Build and operate REST APIs in Python.
- Contribute to continuous integration and deployment practices.
Skills
Tools
Language : Native / fluent English. Resumes in English.
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.
- 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.
- 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.
- 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.
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
Senior Software Engineer • Aracaju, Sergipe, Brazil
* The salary benchmark is based on the target salaries of market leaders in their relevant sectors. It is intended to serve as a guide to help Premium Members assess open positions and to help in salary negotiations. The salary benchmark is not provided directly by the company, which could be significantly higher or lower.