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FinTech & SaaS Application EngineeringEnrollment opening soon

Financial Backend & API Architecture

Design reliable financial backends: ledger data models, idempotent APIs, event-driven processing with Kafka, security, observability and audit trails.

  • Duration8 weeks
  • LevelAdvanced
  • Modules8
  • Lessons32
Enroll nowView curriculum
Financial Backend & API Architecture
Proposed fee$1,199USD · 8 weeks

Course overview

Backends that move or record financial value must stay consistent under retries, failures and concurrent requests. This course covers the architecture patterns that make that possible, including double-entry ledger schemas, idempotent API design, transactional messaging and audit logging. You will design, build and load test services in Python with PostgreSQL and Kafka, and document your decisions the way production teams do.

  • API design and versioning
  • Ledger data modeling
  • Idempotency and retries
  • Event streaming with Kafka
  • API security
  • Observability

What you will learn

  • Model accounts and transactions with a double-entry ledger in PostgreSQL
  • Design versioned, documented APIs with idempotent write operations
  • Implement reliable asynchronous workflows using queues, Kafka and the outbox pattern
  • Apply authentication, authorization, rate limiting and secrets management to financial services
  • Instrument services with logs, metrics, traces and audit trails

Curriculum

8 modules · 32 lessons · 8 weeks. Curriculum preview; the final syllabus may change before enrollment opens.

  • Monoliths, modular monoliths and services
  • Domain-driven design for financial products
  • Synchronous and asynchronous workflows
  • Architecture decision records

  • Resource modeling and REST conventions
  • Versioning and backward compatibility
  • OpenAPI contracts
  • Idempotency keys for safe retries

  • Relational schemas in PostgreSQL
  • Transactions and isolation levels
  • Double-entry ledger design
  • Schema migrations without downtime

  • Message queues and task workers
  • Event streaming with Kafka
  • The outbox pattern for reliable events
  • Handling duplicates and ordering

  • OAuth 2.0 and token handling
  • Authorization models
  • Input validation and rate limiting
  • Secrets management and encryption

  • Caching with Redis
  • Indexes and query plans
  • Load testing APIs
  • Horizontal scaling patterns

  • Structured logging and tracing
  • Metrics and service-level objectives
  • Audit logs for financial actions
  • Incident response basics

  • Integrating external financial APIs safely
  • Webhooks and reconciliation jobs
  • Designing a payments-style backend
  • Architecture review and presentation

Practical projects

01

Design and implement a double-entry ledger API with idempotent transaction endpoints

02

Build an event-driven order and notification service using Kafka and the outbox pattern

03

Load test an API, profile slow queries and document indexing and caching improvements

Skills you will practice

  • FastAPI
  • PostgreSQL
  • Kafka
  • Redis
  • OpenAPI
  • OAuth 2.0

Requirements

Who it's for

  • Backend engineers building payments, ledger or brokerage-style platforms
  • Developers who completed FinTech Software Engineering Fundamentals
  • Technical leads reviewing financial service architectures

Prerequisites

  • FinTech Software Engineering Fundamentals or equivalent backend experience
  • Solid Python skills and working knowledge of SQL

Learning format

  • Self-paced lessons with architecture diagrams and code walkthroughs
  • Coding labs that build services incrementally
  • Design assignments with written architecture decision records
  • Live design reviews in cohort runs

Quantzivo certificates are completion credentials issued by Quantzivo, not accredited qualifications. Courses teach technical and research skills; they do not promise investment returns or provide investment advice.

Frequently asked questions

Self-paced lessons with architecture diagrams and code walkthroughs Coding labs that build services incrementally Design assignments with written architecture decision records

FinTech Software Engineering Fundamentals or equivalent backend experience. See the full list under Requirements.

Yes. Completing the lessons and assessed projects earns a Quantzivo certificate of completion. It is a completion credential issued by Quantzivo, not an accredited qualification.

The $1,199 USD fee is a proposed launch price. Final fees, schedules, refund terms and any regional options are confirmed before any payment is taken.

Quantzivo teaches technical, data and research skills. It does not provide investment advice, trading signals or any promise of returns. Trading involves risk, including loss of capital.
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