Modern Banking Platform on AWS

Finance · Case study

Client context

A growth-stage fintech building a digital banking experience for retail customers in India. Product, risk, and operations leaders needed a funding-ready platform: fast onboarding for customers, live visibility for ops, and cloud spend that would not spiral before the next milestone. They had partial prototypes and compliance pressure, but not a maintainable production core. Prior vendors had delivered screenshots and demos; AVYRION was asked to deliver a platform ops could run and auditors could review. Stakeholders included product, engineering, risk, and customer support — each with different definitions of “done.”

Business problem

Customer onboarding took too many manual steps, session and risk signals lived in disconnected tools, and monthly AWS spend climbed faster than active usage. Leadership could not demonstrate a controlled cost trajectory or a single pane of glass for triage — both blockers for the next product and fundraising milestone. Support exported CSVs to answer basic “what happened in this session” questions. Risk lacked timely signals. Engineering spent cycles firefighting instead of shipping payments readiness. The business problem was not a missing feature list — it was an unreliable operating system for digital banking growth.

The challenge

Deliver a secure, scalable digital banking experience without a multi-year rewrite or an unmaintainable monolith. Constraints included role-based access for support and risk, performance budgets on onboarding and dashboards, staged environments reviewers could audit, and a modular boundary ready for payments and cards later — without boiling the ocean in phase one. Non-goals were explicit: no full cards stack in MVP, no premature microservices sprawl, and no dark-pattern onboarding that would fail compliance review. The delivery challenge was sequencing trust, cost control, and customer speed in the same release train.

Technical solution

AVYRION designed and built a cloud-native banking platform on AWS with conversion-focused onboarding, role-based access, and real-time operational dashboards. We treated security controls, observability, and infrastructure as code as release requirements, not afterthoughts. Discovery mapped the onboarding funnel and compliance constraints with product and risk stakeholders before a line of production code shipped. Weekly demos kept everyone aligned while we right-sized services, introduced caching where it mattered, and documented runbooks for cutover. Performance budgets gated dashboard and onboarding interactions so “fast enough in a slide” could not replace measured latency under load. The result was a production-ready core the client could extend for payments and cards instead of replacing — with ops finally triaging live issues without spreadsheet exports.

Architecture

Browser and mobile clients call a Node.js API behind an API gateway. Authentication uses short-lived tokens with role-based policies for customer, support, and risk personas. Operational events stream into dashboards so teams can triage without spreadsheet exports. PostgreSQL holds core account and session state with clear ownership boundaries between profile, session, and insights services. Infrastructure is defined in Terraform across staging and production, with centralized logging and alarms on latency, errors, and cost anomalies. Blue/green style cutover reduced launch risk, and handover included IaC, monitoring playbooks, and a backlog for payments and card modules on the same platform core. Cost dashboards sat next to reliability alarms so engineering and finance shared one narrative about spend versus usage.

Development process

1. DiscoverMapped onboarding funnel, compliance constraints, and ops workflows with product and risk stakeholders.
2. DesignUX for signup-to-first-session plus service boundaries for auth, profiles, and insights.
3. BuildIterative releases with weekly demos, security reviews, and performance budgets.
4. LaunchBlue/green style cutover to AWS, runbooks, and handover of IaC + monitoring.

Business outcomes

• About 35% lower monthly infrastructure cost after right-sizing and caching
• Roughly 2.5× faster key dashboard and onboarding interactions under load tests
• Ops could triage live issues without exporting spreadsheets
• Roadmap unlocked for payments and card modules on the same platform core

Delivery results

• Lower infrastructure cost through right-sized AWS services and caching
• Faster customer journeys from signup to first successful session
• Clear operational dashboards for support and risk teams
• A foundation ready for payments, cards, and future fintech modules

“AVYRION gave us a production-ready banking experience without the cloud bill spiral we feared — and our ops team finally has dashboards they trust.”

Documented by AVYRION Editorial Team