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).
* Develop and maintain client-facing device intelligence instrumentation in JavaScript where needed (collection, privacy controls, performance).
* 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
* JavaScript experience beyond basics (instrumentation, performance, privacy-aware collection) for client integrations.
* 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
* Linux/DevOps experience running production services
* Any JavaScript instrumentation work and client-facing delivery experience