Senior Custom Software Engineer -WHIPPANY, NEW JERSEY (Local candidates only; EST)

h3 Technologies, LLC; New Jersey; Hybrid; USD 120,000 - 150,000; Full time

Job summary

h3 Technologies, LLC is seeking a Senior Full Stack Engineer in Whippany, New Jersey. The ideal candidate will lead the design and development of critical software systems for a US banking client. Responsibilities include architecting full-stack solutions with Java, React, and AWS and driving best practices in DevOps.

Preferred qualifications include extensive experience in financial services and expert-level knowledge of enterprise Java and cloud-native architectures. Local candidates who can work hybrid 3 days a week will be prioritized.

Qualifications

• 10+ years of experience with Java, Spring Boot, and Microservices Architecture.
• 5+ years of experience with React or Angular.
• 5+ years of expert level proficiency in AWS.

Responsibilities

• Architect full-stack solutions using Java/Spring backend and React/Angular frontend.
• Lead design sessions and technical planning for engineering tasks.
• Define coding standards and performance guidelines.
• Guide cloud-native patterns and mentor engineers.

Skills

Java

Spring Boot

Microservices Architecture

React

Angular

AWS Expert Level Proficiency

Tools

Terraform

CloudFormation

Kafka

Kinesis

EKS

Kubernetes

Datadog

CloudWatch

Prometheus

Grafana

Job description

Location

Whippany, New Jersey (Local candidates only; EST)

Work Setup

Strict hybrid model, requiring the contractor to be onsite 3 days a week at the Whippany, New Jersey location. Only local candidates will be considered.

Position Overview

The Senior Full Stack Engineer will lead the design, development, and deployment of mission‑critical software systems for a prominent US banking client within Financial Services. The team’s mission is to shape engineering standards, architectural direction, and technical strategy while mentoring the engineering team and ensuring alignment with core financial business outcomes.

Day-to-Day Responsibilities

• Architect full‑stack solutions using Java/Spring backend, React/Angular frontend, and AWS cloud services.
• Lead design sessions, technical planning, and backlog refinement for engineering tasks.
• Define coding standards, secure coding practices, and performance guidelines.
• Drive CI/CD maturity, observability, and DevOps best practices.
• Guide the definition of cloud‑native patterns (serverless, microservices, containerization). Mentor engineers and influence cross‑team decisions to ensure reliability, scalability, and security.

Required Skills

• Java, Spring Boot, Spring Cloud, and Microservices Architecture – 10+ years experience.
• React or Angular – 5+ years experience.
• AWS Expert Level Proficiency (EC2, Lambda, API Gateway, ECS/EKS, S3, RDS, etc.) – 5+ years experience.

Additional Desired Skills

• Advanced system design, distributed systems, and integration architecture.
• Infrastructure as Code (Terraform, CloudFormation).
• High‑scale event streaming (Kafka, Kinesis) and advanced container orchestration (EKS, Kubernetes).
• Observability stacks (Datadog, CloudWatch, Prometheus, Grafana).

Ideal Candidate Profile

The ideal candidate is a seasoned Senior Full Stack Engineer with extensive experience in the Financial Services domain, deep expert‑level mastery in enterprise Java ecosystems and cloud‑native architecture, and a proactive, leadership‑oriented approach suited to mentoring teams and influencing cross‑functional engineering decisions.

Visa considerations: EAD, GC, and US Citizens are preferred, but no hard visa restrictions exist if valid. Non‑local candidates who cannot work hybrid 3 days per week will not be considered.