.NET Developer Lead

Quantum Technologies. LLC; Fort Mill, Northern (SC, KY); Hybrid; USD 110,000 - 140,000; Full time

Job summary

Quantum Technologies LLC is seeking a senior software engineer to design and implement C# applications with multithreading and async patterns. You will build RESTful APIs and microservices using ASP.NET Web API, ensure secure authentication via tokens/OAuth, and leverage AWS services for cloud deployment.

Responsibilities include implementing distributed caching, messaging with queues, and working with SQL Server, SSIS/SSRS for data services.

Qualifications

• Proficient in C# with multithreading and async programming.
• Strong command of OOP concepts, SOLID principles, and design patterns.
• Experience building REST APIs and microservices using ASP.NET Web API.
• Secure web applications using authentication tokens, certificates, OAuth, etc.
• Hands-on with caching and distributed caching.
• Experience with pub/sub messaging and queues (at least one system).
• Strong SQL Server skills including joins, stored procedures, functions, and complex queries; SSIS and SSRS experience.
• Mandatory AWS services experience: Lambda, CloudWatch, API Gateway, S3, EC2, SNS, SQS, ELB.
• Familiarity with Docker, Kubernetes, Kafka, MQ; IAM and SaaS architecture knowledge.
• UI framework familiarity is a plus.
• Excellent business communication and client-facing consulting experience.

Skills

C# Multithreading

Async programming

OOP & SOLID

Design Patterns

REST API

Microservices

ASP.NET Web API

OAuth & Tokens

IAM & Access Control

Distributed Caching

Message Queuing

SQL Server & T‑SQL

SSIS/SSRS

AWS (Lambda, CloudWatch, API Gateway)

Docker

Kubernetes

Kafka

MQ

Tools

Docker

Kubernetes

Kafka

MQ

Job description

Job Description:

• Programming Expertise:
• Advanced proficiency in C# with Multithreading and Async programming
• Strong command of OOP concepts, SOLID principles, and Design Patterns
• Web & API Development:
• Proven experience in REST API and Microservices using ASP.NET Web API
• ASP.NET MVC experience alone is NOT acceptable
• Security:
• Expertise in securing web applications using Authentication Tokens, Certificates, OAuth, etc.
• Caching & Messaging:
• Hands-on experience with Caching and Distributed Caching
• Proficiency in Pub/Sub, Queues/Topics, and Message Brokers (at least one queuing system)
• Database:
• Strong knowledge of SQL Server including Joins, Stored Procedures, Functions, and writing complex queries
• Experience with SSIS and SSRS
• Cloud & DevOps:
• Mandatory experience with AWS services: Lambda, CloudWatch, API Gateway, S3, EC2, SNS, SQS, ELB
• Expertise in Docker, Kubernetes, Kafka, MQ
• Strong understanding of IAM, Authorization and Access Control, SaaS architecture
• Additional Requirements
• UI Technologies: Familiarity with modern UI frameworks (added advantage but not mandatory)
• Soft Skills:
• Excellent business communication
• Proven client-facing and consulting experience
• Ability to coordinate with stakeholders and offshore teams
• Strong solutioning mindset

QUANTUM TECHNOLOGIES LLC is an equal opportunity employer inclusive of female, minority, disability and veterans, (M/F/D/V). Hiring, promotion, transfer, compensation, benefits, discipline, termination and all other employment decisions are made without regard to race, color, religion, sex, sexual orientation, gender identity, age, disability, national origin, citizenship/immigration status, veteran status or any other protected status. QUANTUM TECHNOLOGIES LLC will not make any posting or employment decision that does not comply with applicable laws relating to labor and employment, equal opportunity, employment eligibility requirements or related matters. Nor will QUANTUM TECHNOLOGIES LLC require in a posting or otherwise U.S. citizenship or lawful permanent residency in the U.S. as a condition of employment except as necessary to comply with law, regulation, executive order, or federal, state, or local government contract