A practical playbook for engineering teams that need to achieve SOC 2 compliance in embedded finance. Covers audit trail architecture, access control design, evidence collection automation, and the controls that auditors actually care about.
Someone from compliance, legal, or a prospective enterprise customer just told your engineering team: "We need SOC 2." Maybe it is a contract requirement. Maybe your banking partner mandated it. Maybe your CEO got the question on a sales call and committed to a timeline without consulting you.
Here is what nobody tells you upfront: SOC 2 is not a technology problem. It is a controls documentation problem that happens to require technology. The audit does not care what language your backend is written in. It cares whether you can prove, with evidence, that you consistently apply security controls to the systems that handle customer data.
For embedded finance companies, this is harder than it sounds. You are handling financial data across multiple systems -- your own application, your banking-as-a-service provider, payment processors, and potentially a ledger or reconciliation layer. Each system boundary is a place where controls can break down and auditors will probe.
This playbook covers the architecture decisions and engineering work required to pass a SOC 2 Type II audit for an embedded finance platform, written for the engineer who has to actually build it.
SOC 2 is a framework from the AICPA (American Institute of Certified Public Accountants) that evaluates an organization's controls against five Trust Services Criteria:
For fintechs handling financial data, you will almost certainly need Security, Availability, and Processing Integrity. Confidentiality is common too. Privacy depends on whether you handle PII directly.
Type II means your controls must be operational and producing evidence for months before the audit. You cannot cram for it. If your audit window is Q3, your controls need to be running and collecting evidence no later than Q1.
An audit trail is not a nice-to-have for SOC 2 in fintech. It is the foundation that most other controls depend on. Auditors will ask: "Can you show me who did what, when, and what changed?"
Every action that touches financial data or system configuration must be logged:
Audit logs must be tamper-proof. An engineer (including yourself) should not be able to modify or delete log entries after they are written. Common implementation patterns:
For most fintech startups, the pragmatic approach is append-only tables for real-time operational logs combined with periodic export to locked object storage for long-term retention.
Auditors will ask about your retention policy. Define it before the audit:
Document the policy. The documentation itself is evidence.
Everyone says they follow least privilege. Auditors will test whether you actually do. For embedded finance, this means:
Auditors will check whether a single person can both initiate and approve sensitive actions. In financial operations, this typically means:
Implement this in code, not in policy documents. Approval workflows with enforced role separation are easier to prove than written policies that depend on people following rules.
SOC 2 Type II requires periodic access reviews -- evidence that you regularly verify who has access to what and revoke access that is no longer needed. Quarterly reviews are the standard cadence.
Automate what you can:
The output of these scripts -- timestamped, stored in your audit log -- becomes your evidence.
SOC 2 Type II requires evidence that controls operated consistently over the audit period. If you are collecting this evidence manually -- screenshots, spreadsheets, email threads -- you will:
Build automated evidence collection for these control categories:
Build a lightweight pipeline that periodically collects evidence artifacts and stores them in a structured, timestamped, tamper-resistant location:
This pipeline runs continuously throughout the audit period, not just before the audit.
For embedded finance, auditors will pay special attention to processing integrity -- ensuring that financial transactions are processed completely and accurately:
Embedded finance means data crosses system boundaries constantly -- between your application, your BaaS provider, payment processors, and your ledger. Each boundary is a risk point:
You do not need to achieve SOC 2 compliance for your entire company and every system on day one. Scope the audit to the systems and processes that handle customer financial data. This is called the "system boundary." A smaller, well-controlled scope is better than a broad scope with gaps.
SOC 2 Type II is an ongoing commitment. If your controls degrade after the audit period, your next audit will reflect that. Build controls that are sustainable, not controls that are impressive but require heroic effort to maintain.
If your BaaS provider, payment processor, or infrastructure provider does not have their own SOC 2 report, you inherit their risk. Request SOC 2 reports from critical vendors and review them annually. Map their controls to yours and identify gaps in the handoff.
SOC 2 in fintech is fundamentally an engineering problem. Compliance teams can define policies, but engineers build the controls. Involve engineering from the gap assessment onward, not after policies are written and deadlines are set.
Plan for 9-12 months from kickoff to completed report. The first 3-4 months are control implementation and tooling. The remaining 6+ months are the observation period where your controls must be operating and producing evidence. Some audit firms accept a 3-month observation window for first-time audits, but 6 months is more common and produces a stronger report.
Audit firm fees typically range from 30,000 to 100,000 USD for a Type II audit, depending on scope and complexity. The bigger cost is engineering time: expect 1-2 engineers spending 30-50% of their time on control implementation for 2-3 months, plus ongoing maintenance effort of roughly 5-10 hours per week for evidence monitoring and access reviews.
Yes. Your BaaS provider's SOC 2 covers their systems and controls, not yours. When you build on top of a BaaS platform, you introduce your own systems, access patterns, and data handling that are outside their scope. Enterprise customers and banking partners will want to see your SOC 2 report, not just your vendor's.
PCI DSS applies specifically to cardholder data (credit card numbers, CVVs). SOC 2 is broader, covering security, availability, and processing integrity of any system. Most fintechs need both: PCI DSS if they handle card data, SOC 2 for the broader platform. They have significant overlap in controls (access management, encryption, logging) but different audit processes and requirements.
Platforms like Vanta, Drata, and Secureframe can accelerate SOC 2 readiness by automating evidence collection, policy templates, and control monitoring. They are genuinely useful for reducing manual work. However, they do not eliminate the need for engineering work -- you still need to implement the actual controls in your systems. They automate the evidence gathering and compliance management layer on top. For fintech-specific controls like transaction integrity and reconciliation audit trails, you will need domain-specific tooling regardless.
Financial reconciliation is a core processing integrity control for fintechs. Auditors will want evidence of: (1) automated reconciliation runs with timestamps and results; (2) exception detection and resolution workflows; (3) approval chains for manual overrides; (4) historical reconciliation accuracy metrics. If you are building this from scratch, the evidence collection burden is significant. Platforms like NAYA's controls layer generate audit-ready evidence as a byproduct of normal reconciliation operations, which reduces the engineering overhead of SOC 2 evidence collection for financial processes.
Fintechs thrive on speed, but manual reconciliation causes costly delays, compliance risks, and scaling issues. Learn how automation and machine learning cut errors by 60%, unlock real-time insights, and turn reconciliation into a strategic advantage for growth and innovation.
Scaling fintechs face hidden risks and inefficiencies from outdated ledger systems. Discover how a purpose-built ledger streamlines compliance, reduces manual work, and unlocks real-time financial insights essential for sustainable growth.
Manual reconciliation is no longer viable. NAYA’s multi-agent AI platform transforms financial operations with 99%+ accuracy, dynamic rule generation, and real-time compliance monitoring. Discover how fintechs are replacing legacy systems with intelligent, scalable infrastructure.
Join 4,000+ fintech engineers receiving our best operational patterns.