Open to senior & lead roles · Stanhope, NJ

Davin LaIacoma

Senior Software Engineer & Team Lead building backend systems that healthcare runs on.

Nine years of Java and Spring Boot at Evernorth (Cigna / Express Scripts): high-volume REST services, distributed integrations, and centralized security, plus an AI-enabled engineering tool I built solo. Off the keyboard you'll find me on a trail, on a ski slope, or with my kids.

01 / Work

Evernorth Health Services

Software Engineer – Team Lead · 2017 – Present · Cigna / Express Scripts

Address Platform

A 200+ calls/sec service behind home-delivery prescriptions

Architected the REST service for member address create, update, delete and validation. Orchestrates member, benefit and USPS Code 1 validation calls before handing off to IBM MQ for async processing.

  • Spring Boot
  • IBM MQ
  • Test-first
User Administration API

Centralized access control across 16+ services

Built with the principal architect: a Spring Boot API for users, roles, permissions and client access, wired to Okta tokens and MongoDB.

  • Okta
  • RBAC
  • MongoDB
Gateway Re-Architecture

Cut central gateway traffic by 60%

Moved React static assets to external AWS DMZ deployments while keeping backend API routing intact, opening a path to client-facing access.

  • AWS
  • React
  • Networking
Customer Contact Platform

From first commit to 15,000+ daily users

Helped build the ground-up replacement for a legacy tool, then kept shipping: cart and payment, profiles, prescription views and order status across 50+ microservices.

  • Microservices
  • Payments
Leading the teamTechnical design and delivery for 8 engineers and 2 QA for over a year.
Partnering with productSizing, cost and impact trade-offs, breaking requirements into shippable work.
Raising the barMentoring, onboarding, code reviews and production troubleshooting.
02 / Projects

Things I've built

All repos on GitHub
Featured · Sole developerInternal tool

AI Engineering Health Platform

Centralizes technical-debt campaigns, like a Splunk-to-Dynatrace migration, into one place to track rollouts. An AI chatbot answers from a knowledge store of past actions, Git release data feeds planning, and predefined changes open pull requests automatically. It can also apply SKILLS.md instruction files straight to repositories.

  • FastAPI
  • React
  • PostgreSQL
  • OpenAI SDK
03 / Skills

The toolbox

BackendJava · Spring Boot · Spring MVC · REST APIs · Python · FastAPI
ArchitectureDistributed systems · API orchestration · Async messaging · Service integration
SecuritySpring Security · Okta · Token auth · RBAC
Data & messagingMongoDB · PostgreSQL · Oracle SQL · IBM MQ · Kafka
Cloud & UIAWS · OpenShift · Kubernetes · React · JavaScript
Quality & opsJUnit · Mockito · Maven · Dynatrace · Splunk · Git
04 / Off the clock

When I'm not shipping code

North Jersey is a good home base for all of it.

Davin and his daughter giving a thumbs up on his orange dirt bike

Dad first

The most important job I have. My favorite riding buddy is already in training.

Davin smiling with his mountain bike on a wooded trail

On the trails

Dirt bike days on a 2026 KTM 250 XC, mountain bike when I want to earn the climb. Roots and rocks are the best debugging break there is.

Ski selfie with mirrored goggles above snow-covered trees and mountains

Skiing & outdoors

Winters on the slopes, the rest of the year outside however I can get there.

Old School RuneScape

A long-time grind I still love, and proof that patience and a good plan pay off.

My real stats on Wise Old Man
05 / Contact

Let's build something reliable.

I'm interested in senior and lead backend roles where Java, distributed systems and thoughtful technical leadership matter.