Object-oriented Design Patterns jobs

Engineer, Software - Lead I

Quest Diagnostics · Posted Nov 9, 2026

Open

United States
On-site
Lead
5–7 years

Engineer, Software - Lead I

Quest Diagnostics · Posted Nov 9, 2026

Open

United States
On-site
Lead
5–7 years

Senior Oracle XStore POS Developer

Talent Software Services, Inc. · Posted Nov 9, 2026

Open

Atlanta, Georgia, United States
Contract · Senior
8+ years

Apply with RefersoAI Apply on careers page

We are seeking an experienced Oracle XStore POS Developer with strong expertise in Java development, retail point-of-sale (POS) systems, payment integrations, and AI-enabled software engineering to support and enhance healthcare retail and pharmacy operations.

Responsibilities

Design, develop, customize, and support Oracle XStore POS applications for healthcare and pharmacy operations.
Develop scalable Java-based applications, APIs, and microservices supporting retail and payment workflows.
Integrate Oracle XStore with payment gateways, tokenization platforms, POS devices, and enterprise healthcare systems.
Collaborate with business, pharmacy, clinical, and IT stakeholders to deliver innovative retail solutions.
Analyze business requirements and translate them into technical designs and application enhancements.

Requirements

Bachelor's or Master's degree in Computer Science, Engineering, or related field.
Nice to have: Healthcare provider organizations
Nice to have: Pharmacy retail systems
Nice to have: Hospital payment systems
Nice to have: Patient billing and collections

Skills

Oracle Retail Technologies Oracle XStore POS XAdmin

Senior Firmware Engineer

Thermo Fisher Scientific · Posted Oct 30, 2026

Open

Singapore, Singapore
On-site
Senior
3+ years

Apply with RefersoAI Apply on careers page

Design and implement sophisticated embedded software applications that control analytical instruments for scientific research.

Responsibilities

Design and implement firmware for analytical instruments
Collaborate with scientists, engineers, and domain experts
Contribute to technical innovation in an agile environment

Requirements

Advanced degree plus 3 years of experience
Bachelor's degree plus 5 years of experience in software development

Skills

Embedded C/C++Python Hardware diagnostic tools Oscilloscopes Digital signal analyzers Electrical schematics JTAG/SWD debugging Object-oriented design patterns Data structures

JAVA Developer

NJM Insurance Group · Posted Jul 17, 2026

Open

Trenton, New Jersey, United States
Hybrid
Full-time · Associate
$87K–$110K per year
3+ years

Apply with RefersoAI Apply on careers page

Developing, configuring and customizing business applications within an agile delivery team using JAVA.

Compensation

Pay Range: $87,339-$110,042

Responsibilities

Code, configure, develop, and debug functionality in core systems in accordance with architectural guidelines and defined best practices, this includes: screens, data model, batches
Plan, initiate, and conduct unit and integration testing of applications
Provide accurate and reliable estimates
Consistently deliver work on time and of high quality
Understand and work from business requirements documentation (user stories, use cases, as well as traditional software requirements specifications)

Requirements

Bachelor’s Degree in Computer Science or related field
Nice to have: web services
Nice to have: messaging
Nice to have: agile development
Nice to have: Guidewire technologies

Skills

object-oriented technologies object-oriented design patterns software architecture concepts

Senior Developer

HEALTHSTREAM INC · Posted Nov 3, 2026

Open

Remote, United States
Remote
Senior

Apply with RefersoAI Apply on careers page

Design, build, and maintain a large‑scale Salesforce managed package, owning complex platform features end‑to‑end and raising the technical bar for the team.

Responsibilities

Design, develop, and ship features on the Salesforce platform using Apex, Lightning Web Components, Flows, custom objects, and metadata-driven configuration
Build and maintain a second-generation managed package (2GP), including namespacing, package versioning, upgrade paths, and subscriber-safe changes
Design solutions that stay within governor limits and work reliably across many subscriber orgs with different data volumes and configurations
Build and support integrations (REST/SOAP, named credentials, callouts, platform events, and external systems)
Write Apex unit tests and participate in code reviews, design reviews, and release planning

Skills

Apex Lightning Web Components Flows custom objects metadata-driven configuration second-generation managed package

Engineer, Software - Lead I

Engineer, Software - Lead I

Responsibilities

Requirements

Skills

Senior Oracle XStore POS Developer

Responsibilities

Requirements

Skills

Senior Firmware Engineer

Responsibilities

Requirements

Skills

JAVA Developer

Compensation

Responsibilities

Requirements

Skills

Senior Developer

Responsibilities

Skills

Benefits

Benefits