Principal Software Engineer, Customer Messaging Platform

FIS•Jacksonville, FL

About The Position

At FIS, you will shape the platform used by FIS teams to reach customers through email, push notifications, and SMS. You will define how messages are composed, branded, delivered, measured, and governed across financial institutions, enabling teams to send consistent, compliant, and timely communications. As a principal engineer, you will set technical direction for customer messaging, make build, buy, or adopt decisions, and connect business stakeholders with engineering. Success means messages reach customers reliably, reflect each brand, and meet regulatory requirements by default.

Requirements

Extensive experience architecting and delivering production-grade messaging or notification platforms at scale.
Hands-on experience with email delivery, push notifications (APNs, FCM), and SMS.
Knowledge of email deliverability and authentication (SPF, DKIM, DMARC) and SMS compliance, such as 10DLC and short codes.
Proven ability to work with business stakeholders and translate their needs into technical direction.
Strong experience with modern backend and frontend engineering, including TypeScript and API design.
Proven technical leadership across architecture, standards, and cross-team delivery.
Hands-on experience with AI coding tools and a point of view on how they change engineering work.
Degree in computer science, engineering, or a related field, or equivalent practical experience.

Nice To Haves

Experience in banking, payments, or financial services.
Experience with messaging providers or customer engagement platforms, such as Twilio, SendGrid, or Braze.
Hands-on experience spinning up an APNs system from scratch.
Knowledge of communication regulations and consent management in financial services, such as TCPA and CAN-SPAM.
Experience building multi-tenant or white-label messaging for many brands.
Experience with headless content management systems and content modeling.
Experience with Model Context Protocol (MCP) or exposing platform capabilities to AI agents.
Familiarity with secure software development practices for regulated financial environments.

Responsibilities

Define the architecture and technical strategy for customer messaging across email, push notifications, and SMS.
Build shared services for message templating, multi-brand theming, personalization, and orchestration across channels.
Own deliverability and reliability, including email authentication, Apple and Google push delivery, SMS carrier compliance, retries, and failover.
Lead decisions on messaging vendors and infrastructure, including build, buy, or adopt tradeoffs.
Build preference, consent, and opt-out management that meets financial-services regulatory requirements.
Make delivery, engagement, and failure metrics visible to teams and stakeholders.
Serve as the primary technical partner for business and product stakeholders who depend on customer messaging.
Translate business, product, and compliance needs into platform capabilities, roadmaps, and clear tradeoffs.
Enable AI agents and AI-assisted workflows to compose, personalize, and send messages safely.
Partner with design, web, mobile, security, and platform teams to deliver consistent customer experiences.
Shape the content platform that supplies copy and assets to messaging, web, and mobile channels.
Coach engineers and technical leads while strengthening engineering practices.