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How a High-Growth FinTech Company Scaled an Enterprise-Grade Platform

A secure, compliant, and modular financial foundation strengthened through senior engineering augmentation, built to handle high-volume transactions, strict regulatory controls, and rapid feature delivery without compromising stability.

Go Back

Type

Fintech Platform

Type

Fintech Platform

Type

Fintech Platform

Platform

Web

Platform

Web

Platform

Web

Industry

Financial Services

Industry

Financial Services

Industry

Financial Services

Spiral

This high-growth FinTech company operated in a tightly regulated space, managing payments, loan servicing, identity checks, and reporting. With millions moving weekly, the platform needed to stay fast, compliant, and resilient. Any failure carried major risk, so the team had to scale quickly without common early-stage pitfalls.

Key Results

Through senior engineering augmentation, the company strengthened its core platform and achieved long-term stability while accelerating development velocity.

Beyond the immediate metrics, this foundation secured Kizuna's market position
and unlocked long-term, unhindered growth.

99.9%

uptime from day one with zero compliance violations

99.9%

uptime from day one with zero compliance violations

99.9%

uptime from day one with zero compliance violations

50+

engineers onboarded smoothly, scaling from a 5-person core team without productivity drop

50+

engineers onboarded smoothly, scaling from a 5-person core team without productivity drop

50+

engineers onboarded smoothly, scaling from a 5-person core team without productivity drop

300%+

faster feature development compared to typical MVP teams

300%+

faster feature development compared to typical MVP teams

300%+

faster feature development compared to typical MVP teams

$100K+

saved in avoided compliance penalties and rebuild costs

$100K+

saved in avoided compliance penalties and rebuild costs

$100K+

saved in avoided compliance penalties and rebuild costs

The Challenge

FinTech founders face a familiar paradox: Grow fast enough to win the market, but build stable enough to pass regulation.

Many early-stage teams cut corners by building quick monolithic MVPs, relying heavily on third-party services, or skipping automated guardrails, choices that work temporarily, until growing transaction volumes expose the cracks.

Compliance risk during audits

Compliance risk during audits

Compliance risk during audits

Systems slowing under transaction surges

Systems slowing under transaction surges

Systems slowing under transaction surges

Costly rewrites right when growth accelerates

Costly rewrites right when growth accelerates

Costly rewrites right when growth accelerates

This company wanted to avoid that trajectory entirely.
They needed to scale their engineering systems responsibly, without slowing down.

The Solution

Better Software partnered through a Team Augmentation model, embedding senior engineers, architects, and QA specialists. The goal wasn’t to rebuild the platform but to strengthen, modularize, de-risk, and accelerate it while preserving startup-speed execution.

Our Approach

Modular Architecture

We expanded and refined a domain-driven structure, resulting in 290+ modules that enabled independent development, parallel scaling, and clean ownership boundaries.

Modular Architecture

We expanded and refined a domain-driven structure, resulting in 290+ modules that enabled independent development, parallel scaling, and clean ownership boundaries.

Modular Architecture

We expanded and refined a domain-driven structure, resulting in 290+ modules that enabled independent development, parallel scaling, and clean ownership boundaries.

Type Safety Everywhere

End-to-end TypeScript and Python typing reduced runtime failures and improved cross-team reliability.

Type Safety Everywhere

End-to-end TypeScript and Python typing reduced runtime failures and improved cross-team reliability.

Type Safety Everywhere

End-to-end TypeScript and Python typing reduced runtime failures and improved cross-team reliability.

Testing-First Engineering

We implemented and maintained 7,500+ automated tests, ensuring every release met strict regulatory and audit expectations.

Testing-First Engineering

We implemented and maintained 7,500+ automated tests, ensuring every release met strict regulatory and audit expectations.

Testing-First Engineering

We implemented and maintained 7,500+ automated tests, ensuring every release met strict regulatory and audit expectations.

Internal Frameworks

We built codegen tooling, repeatable migrations, and deployment utilities that boosted engineering throughput at scale.

Internal Frameworks

We built codegen tooling, repeatable migrations, and deployment utilities that boosted engineering throughput at scale.

Internal Frameworks

We built codegen tooling, repeatable migrations, and deployment utilities that boosted engineering throughput at scale.

Technology Used

The Impact

With Better Software’s embedded engineering support, the company solved its most urgent scaling and compliance challenges, achieving enterprise-grade performance without sacrificing delivery speed.

Challenges

Risk of technical bottlenecks & growing debt

Compliance risks & penalties

Systems failing beyond 10K+ daily transactions

Slow feature delivery & painful merge cycles

Modular domains enabling 5–10 teams to build in parallel
Zero compliance violations during rapid scaling
Architecture scaled to enterprise transaction volumes
15–20 features shipped per month consistently

Before

Challenges

Challenges

Risk of technical bottlenecks & growing debt

Risk of technical bottlenecks & growing debt

Compliance risks & penalties

Compliance risks & penalties

Systems failing beyond 10K+ daily transactions

Systems failing beyond 10K+ daily transactions

Slow feature delivery & painful merge cycles

Slow feature delivery & painful merge cycles

After

Software
Software
Modular domains enabling 5–10 teams to build in parallel

Modular domains enabling 5–10 teams to build in parallel

Modular domains enabling 5–10 teams to build in parallel

Zero compliance violations during rapid scaling

Zero compliance violations during rapid scaling

Zero compliance violations during rapid scaling

Architecture scaled to enterprise transaction volumes

Architecture scaled to enterprise transaction volumes

Architecture scaled to enterprise transaction volumes

15–20 features shipped per month consistently

15–20 features shipped per month consistently

15–20 features shipped per month consistently

Lessons For Others Founders

Lessons For Others Founders

In regulated industries, strong engineering foundations are not optional, they’re insurance.

In regulated industries, strong engineering foundations are not optional, they’re insurance.

In regulated industries, strong engineering foundations are not optional, they’re insurance.

Modularity, type safety, and automated testing compound in value as teams scale.

Modularity, type safety, and automated testing compound in value as teams scale.

Modularity, type safety, and automated testing compound in value as teams scale.

Early investment in architecture typically pays back within 6–12 months

Early investment in architecture typically pays back within 6–12 months

Early investment in architecture typically pays back within 6–12 months

Spiral

Ready to strengthen your FinTech foundation?
Let’s discuss your roadmap. Book a call.

Better Software helped this FinTech company scale its enterprise-grade platform responsibly, proving that startups don’t have to choose between speed and stability. With the right engineering augmentation, you can achieve both.

Better Software helped the client build a personal finance platform that was secure, intelligent, and ready for growth—proving that with the right product development approach, fintech startups don’t have to choose between moving fast and building strong.

Better Software helped the client build a personal finance platform that was secure, intelligent, and ready for growth—proving that with the right product development approach, fintech startups don’t have to choose between moving fast and building strong.

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