.NET Core

.NET Core Developer Jobs

85 jobs found

Today

Software Engineer

Booz Allen Hamilton Beavercreek, OH

Beavercreek, OH

Today

$69k - $158k/yr Full time Backend Developer .NET .NET Core

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Job Description

Full stack software engineering role based in Beavercreek, OH, onsite, delivering end-to-end solutions from concept to production in an agile environment.

Responsibilities

Deliver end-to-end solutions in a fast, agile setting by resolving complex problems from concept to production.
Design and implement software and systems from initial vision to production-ready state.
Apply a continuous learning mindset to adopt new tools and techniques and identify opportunities for system improvement.
Assist clients in addressing their most challenging issues using modern architectural approaches, tools, and technologies.
Ensure the team’s solution aligns with the current architecture and operating environment while planning for future functionality and enhancements.

Requirements

Minimum of 2 years designing, modifying, developing, writing, and implementing software applications.
At least 2 years of software development experience with common programming languages, technologies, tools, or web development stacks.
Experience writing source code for new applications or enhancing code samples for existing applications.
Experience using both back-end and front-end languages to deliver complete solutions.
Proven ability to solve complex problems in a collaborative team setting.
Secret clearance is required.
Bachelor's degree or 5+ years of software engineering experience in lieu of a degree.

Technologies

Java
Python
C#
C
C++
.NET
JavaScript
React
Node.js
PHP
Drupal

Benefits

Health, life, disability, financial, and retirement benefits
Paid leave
Professional development
Tuition assistance
Work-life programs
Dependent care
Recognition awards program

The Opportunity

Resolve end-to-end problems in a fast, agile environment as a full stack developer.
Contribute to building systems that make a meaningful impact beyond writing code.
Translate vision into production-ready software and systems.
Leverage a passion for learning new tools and techniques to drive system improvements.
Help clients address their toughest challenges using the latest architectures and technologies.
Ensure solutions consider current architecture and operating environment while planning for future functionality and enhancements.
Contribute to shaping better systems as a collaborative team.
Participate in efforts that aim to deliver meaningful, real-world results.

Work Model

Onsite: work primarily at a Booz Allen office or customer facility, with in-person collaboration as required.
Hybrid: frequent presence at a Booz Allen facility, with possible customer-site visits as needed.
Remote: may be listed as remote, with occasional in-person work at Booz Allen or customer facilities as required.

Clearance

Secret clearance is required; applicants will undergo a security investigation to determine eligibility to access classified information.

Compensation

Estimated annual pay range of $69,300.00 to $158,000.00, influenced by location, education, experience, skills, and contract-specific factors.
Posting closes within 90 days of the posting date.

Identity verification

Identity verification using biometrics and artificial intelligence is part of the hiring process.
Candidates are expected to appear on camera for interviews and assessments.
Booz Allen may take a photograph to verify identity and prevent fraud.

Candidate AI Usage

AI tools are part of daily work but candidate evaluation must rely on your own skills unless explicit permission is given for use in interviews.

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1d ago

Sr. Software Engineer II

TixTrack New York, NY 🇺🇸 Remote

New York, NY

1d ago

$130k - $150k/yr Full time Backend Developer Senior .NET Core

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Job Description

The Senior Software Engineer II positioned in New York, NY with remote work options leads complex technical initiatives on the Nliven platform and drives engineering excellence in a distributed environment. This role requires expertise in .NET Core, full-stack frontend, SRE/DevOps practices, mentoring, and end-to-end delivery.

Responsibilities

Steer sizable, complex initiatives from ideation to deployment, partnering with product managers, designers, and engineers across multiple pods.
Develop clean, reusable, and maintainable solutions across the full technology stack with emphasis on security, scalability, efficiency, and sustainable design.
Lead technical discussions with product and design teams to architect solutions aligned with business goals and long-term technical strategy.
Produce and maintain comprehensive technical documentation, including system architecture diagrams, API contracts, and roadmaps.
Oversee code reviews and mentor engineers across teams, ensuring adherence to engineering best practices and architectural patterns.
Define and promote coding standards, best practices, and design principles across the engineering organization.
Identify and resolve performance bottlenecks and reliability issues, delivering solutions that improve DORA metrics.
Research and evaluate emerging technologies, assessing their adoption and integration into the platform.
Act as a technical mentor across multiple teams, fostering a culture of continuous learning, quality, and technical excellence.
Lead architectural discussions and contribute to strategic roadmaps and platform evolution.
Address highly complex challenges in performance, scalability, security, and system design across multiple domains.
Collaborate with product teams to design features from concept through production, including instrumentation, observability, monitoring, and iterative improvement from user feedback.
Drive efforts to enhance developer experience through tooling improvements, CI/CD optimization, infrastructure upgrades, and onboarding processes.
Collaborate with stakeholders, executive leadership, and cross-functional teams to ensure engineering outcomes deliver strong business value and user experience.
Advocate shipping in small, complete vertical slices supported by trunk-based development and feature flags, avoiding large, risky releases.
Lead incident response efforts and promote accountability, shared ownership, and continuous improvement through participation in incident reviews and reliability initiatives.

Requirements

Bachelor's degree in a related field or equivalent practical experience.
Seven or more years of full stack software development in a SaaS or technology-driven environment.
Proficiency with modern frontend frameworks such as Angular, React, or Vue.
Strong front-end skills including HTML, CSS, and JavaScript.
Solid back-end and API experience with .NET Core.
Deep understanding of SQL databases and data modeling best practices.
Familiarity with Agile frameworks and methodologies.
Strong foundation in computer science concepts.

Technologies

.NET Core
React
Angular
Vue
SQL databases
JIRA
Slack
Microsoft Office
Google Suite

Benefits

Base annual salary between $130,000 and $150,000, commensurate with experience
Eligibility for annual performance bonus based on individual and company performance
100 percent premium coverage for medical, dental, and vision for employees and dependents, with an HSA-eligible option and a $1,000 employer contribution in 2026
Company-paid life insurance
Traditional and Roth 401(k) plans
Paid parental leave
Learning and development reimbursement for eligible educational expenses
Opportunities to work from abroad
Volunteer days off
Flexible scheduling
Up to $300 reimbursement for initial equipment to establish a hybrid work environment
Generous paid time off and holiday schedule
Remote work environment

Other Duties

Please note this job description is not intended to cover or contain a comprehensive list of activities, duties, or responsibilities required for the role. Duties may change at any time with or without notice.

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2d ago

Mainframe Systems Analyst / Developer

Calance US Torrance, CA

Torrance, CA

2d ago

$66 - $66/hr Contract Backend Developer .NET Core CICS

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Job Description

Responsibilities

Provide production support for existing enterprise applications.
Lead new development and enhancement efforts for Parts Applications.
Conduct technical analysis, design, development, testing, implementation, and ongoing support across the SDLC.
Elicit business and functional requirements and translate them into technical solutions.
Design and test across unit, integration, system, and user acceptance, documenting and implementing the results.
Manage projects ranging from small enhancements to large enterprise initiatives.
Collaborate with cross-functional teams across the enterprise to deliver high-quality solutions.
Support production applications by troubleshooting and resolving issues.
Define architectural solutions to meet application requirements.
Allocation of effort: 30-40% Analysis & Design; 30-40% Development (code, unit test, integration test, system test, UAT, implementation, warranty); 20-40% Solution Architecture & Technical Design.

Requirements

Recent hands-on experience with COBOL, CICS, JCL, IMS, VSAM, and DB2.
Solid understanding of the Software Development Life Cycle (SDLC).
Experience designing, developing, and implementing medium to large-scale enterprise applications.
Working knowledge of software engineering, software development, and solution architecture across multiple platforms.
Ability to collaborate across multiple platforms with technical and business teams on technology strategy, standards, roadmaps, and practices.
Understanding of enterprise technology environments, including infrastructure, networking, client/server architecture, and emerging technologies.
Experience working in both Agile and Waterfall development environments.

Technologies

COBOL
CICS
JCL
IMS
VSAM
DB2
Angular
.NET Core
ASP.NET MVC
C#

Benefits

EPO/PPO Medical Plans
HMO/PPO Dental programs
Vision - VSP
401K Retirement vesting program (VOYA)
Paid Bi-Weekly/Direct Deposit
Flex Spending Plan
Voluntary Life, AD&D, STD or LTD plans

Job Details

Position: Mainframe Systems Analyst/Developer
Job Ref#: 44722 - JIH5JP00004462
Duration: 12+ Months (On-Going Contract)
Location: HYBRID - Torrance, CA 90501
Pay Rate: $66.50 per hour (W2 Only)
Hybrid arrangement: Onsite Monday through Thursday, 40 hours per week
Must be LOCAL or willing to RELOCATE at your own expense

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2d ago

Sr. Web Application Developer

Leidos Indianapolis, IN

Indianapolis, IN

2d ago

$108k - $195k/yr Full time Backend Developer Senior .NET Core

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Job Description

Leidos offers a mission-driven environment with robust benefits and continuous opportunities to innovate. This onsite Sr Web Application Developer role is based in Indiana, with a competitive annual salary ranging from USD 107,900 to 195,050. You’ll gain access to Health and Wellness programs, Income Protection, Paid Leave, and Retirement benefits to support both your professional and personal goals.

As a Senior Web Application Developer, you will lead full‑stack web solutions, AI and ML integration, client engagement, and cloud and DevOps practices across .NET/C#, JavaScript, and modern web technologies.

Responsibilities

Own architecture, design, and development of modern web applications across .NET/C#, Node.js, and front-end frameworks like React, Angular, or Vue.
Design and implement scalable, cloud-native solutions using microservices and serverless patterns.
Set and promote engineering best practices, coding standards, and architectural conventions across teams.
Build AI-enabled features, integrating with LLMs and AI APIs such as Azure OpenAI or AWS Bedrock.
Develop intelligent search, summarization, recommendation, and automation workflows.
Collaborate with stakeholders to identify AI opportunities that enhance user experience, decision making, or operational efficiency.
Ensure responsible and secure use of AI technologies, focusing on data privacy, governance, and model evaluation.
Serve as a primary technical liaison to clients, translating business needs into scalable technical solutions.
Lead solutioning sessions, architecture discussions, and technical briefings with stakeholders.
Provide strategic guidance on modern web technologies, cloud adoption, and AI integration.
Build strong client relationships as a trusted technical advisor.
Oversee development of secure, high‑performance web applications and RESTful APIs.
Ensure interoperability and cross‑platform integration across systems.
Drive API design, versioning, and performance optimization best practices.
Architect and deploy applications in AWS and Azure, leveraging serverless and containerized services.
Lead CI/CD pipeline implementation and DevSecOps practices.
Optimize systems for scalability, reliability, and cost efficiency in cloud environments.
Mentor developers across multiple technology stacks, beyond just .NET.
Lead code reviews, architecture reviews, and key technical decisions.
Foster a culture of innovation, continuous learning, and engineering excellence.
Ensure applications meet modern security standards, including secure API design and cloud security practices.
Implement comprehensive testing strategies and performance monitoring.
Continuously improve system resilience, scalability, and maintainability.
Collaborate with UI/UX teams to deliver responsive, accessible, and user-centric applications.
Advance front‑end architecture and performance optimization techniques.
Stay current with emerging web and AI technologies, evaluating their applicability to client missions.
Introduce new tools, frameworks, and AI capabilities to enhance delivery and innovation.

Requirements

US citizenship required and ability to obtain a Public Trust prior to starting.
Bachelor’s or Master’s degree in Computer Science, Information Technology, or a related field, or equivalent experience.
8+ years of full‑stack web development experience, including .NET/C# and modern JavaScript frameworks.
Demonstrated experience across multiple web technologies beyond .NET, such as Node.js or Python.
Strong hands‑on experience with T‑SQL, including writing and optimizing queries, stored procedures, triggers, and functions.
Proven commitment to built‑in quality, delivering reliable, maintainable, and well‑tested solutions.
Ability to follow development best practices, perform code reviews, troubleshoot issues, and ensure quality across the lifecycle.
Hands‑on experience integrating or developing AI/ML capabilities, including working with AI APIs (Azure OpenAI, AWS Bedrock, etc.).
Hands‑on experience applying data‑driven or intelligent features in applications.
Strong experience with AWS and/or Azure, including serverless architectures.
Deep understanding of web architecture, microservices, and RESTful API design.
Experience with SQL and NoSQL databases.
Proven ability to lead teams and engage directly with clients.
Strong communication skills to bridge business needs and technical solutions.
Knowledge of secure application development and cloud security practices.

Technologies

.NET/C#, Node.js
React, Angular, Vue
Python
Azure OpenAI, AWS Bedrock
AWS, Azure, serverless architectures
RESTful APIs
T-SQL, SQL, NoSQL

Benefits

Health and Wellness programs
Income Protection
Paid Leave
Retirement

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2d ago

Lead Software Engineer

Emergent Software Minneapolis, MN 🇺🇸 Remote

Minneapolis, MN

2d ago

$140k - $160k/yr Full time Backend Developer .NET Core API

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Job Description

Emergent Software is hiring a remote direct-hire Lead Software Engineer to design, build, and scale a partner-facing API platform. This leadership role centers on driving the engineering function and coordinating cross-functional collaboration for a new SaaS integrations initiative. The position offers a remote work arrangement with a salary range of USD 140,000 to 160,000 per year and is based in Minneapolis, MN.

Responsibilities

Lead the design, development, and evolution of a partner-facing API platform.
Architect and maintain a secure, well-versioned, developer-friendly public API with emphasis on backward compatibility, authentication, rate limiting, and documentation.
Define and implement API architecture, standards, and best practices.
Provide hands-on technical leadership through architecture guidance, code reviews, mentoring, and engineering best practices.
Own the long-term technical strategy and roadmap for the platform.
Collaborate closely with product managers, project managers, and engineering teams across multiple platforms.
Coordinate the work of distributed engineering resources, including international contractors.
Own production systems for partner APIs, including monitoring, observability, incident response, alerting, performance optimization, reliability, and operational readiness.
Drive integration efforts with external SaaS platforms and partners.
Help establish engineering processes, technical direction, and team standards as the platform grows.
Break down complex initiatives into actionable workstreams and translate business requirements into technical deliverables.
Develop project plans, coordinate resources, and drive timely delivery of key initiatives.
Contribute to architecture and technical decision-making across services and platforms built in multiple languages.
Serve as both a technical leader and hands-on contributor during the initial build phase.

Requirements

5+ years of experience developing web applications, including leadership or mentoring of engineers.
Extensive experience designing, securing, documenting, and operating REST APIs with authentication, versioning, and lifecycle management.
Proven track record of managing and supporting production systems.
Hands-on experience with AWS services, especially API Gateway and ECS, plus related cloud-native technologies.
Strong TypeScript development experience.
Demonstrated technical leadership and project coordination capabilities.
Ability to quickly become productive in unfamiliar codebases and technology stacks.
Experience overseeing live customer-facing systems, including monitoring, observability, incident response, and reliability engineering.
Excellent communication skills and the ability to thrive in a fast-paced, evolving environment.

Technologies

REST
AWS
API Gateway
ECS
TypeScript
C#/Java/Go/Python/Ruby/Node.js
Terraform
CloudFormation
AWS CDK

Nice to have skills

Experience working across multiple backend languages such as C#, Java, Go, Python, Ruby, Node.js, or TypeScript.
Experience designing and delivering public, partner-facing, or developer-focused APIs with developer documentation.
Experience with Infrastructure as Code tools like Terraform, CloudFormation, or AWS CDK.
Background in Agile, Scrum, or Kanban environments.
Experience with test automation, contract testing, and test-driven development.
Experience with SaaS platforms.
Familiarity with web application and API security best practices.
Experience leading distributed or global engineering teams.

Our vetting process

Application (5 minutes)
Online Assessment (40-60 minutes)
Initial Video Interview (45 minutes)
Hiring Manager Phone Interview (30 minutes)
Hiring Manager Video Interview (60 minutes)
Hiring Team Interview
Job Offer!

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3d ago

Senior Developer / Lead Developer

PPL Services Corporation Allentown, PA

Allentown, PA

3d ago

Full time Backend Developer Senior .NET Core

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Job Description

Hybrid Senior/Lead Developer role in Allentown, PA requiring three days in the office per week, focused on designing, building, and testing software across modern stacks while collaborating with business and technology teams, with potential emergency duties.

Responsibilities

Continuously deepen expertise in emerging technologies and software delivery practices.
Partner with business users, systems analysts, developers, and ecosystem partners to move ideas from concept to scalable deployment.
Support analysis and research of new and existing products, processes, and workflow needs within business systems.
Operate within an iterative Agile framework and contribute as a collaborative team member.
Leverage emerging technologies to accelerate product and service launches through rapid prototyping and iterative methods.
Demonstrate a track record of taking prototypes into production while following engineering best practices.
Develop, configure, or customize technical solutions including reusable components, preconfigured solutions, and cloud services.
Collaborate closely with the System Architect and multiple technology teams to promote pattern and platform adoption that supports the solution architecture.
Oversee automation and monitor application integration as code advances through build and test phases.
May be assigned to Electric Utilities emergencies and storms, which may require after-hours work during severe events affecting customer service.
Employer reserves the right to assign on-site, remote, or hybrid work arrangements, with location potentially changing; on-site presence may be required for coordination.
Performs other duties as assigned.
Adheres to all company policies and standards.

Requirements

Bachelor's degree or an equivalent combination of education and experience.
7+ years of professional experience.
Background in software development with proficiency in one or more languages such as C#, Java, JavaScript, TypeScript, among others.
Experience building websites using frontend frameworks like Angular and React.
Experience developing APIs, working with JSON, and strong SQL skills.
Demonstrated enthusiasm and passion for shaping the future through digital technology.
Familiarity with current technologies, trends, standards, products, and their applicability.
Ability to adapt to rapid technological and business change while maintaining energy and sound judgment.
Strong problem solving and analytical skills to develop technology solutions quickly.
Ability to collaborate with internal and external teams to unblock critical issues during product development.
Experience with SAP S/4Hana.
5+ years of related work experience, or an equivalent combination of education and experience on a year-for-year basis.
Experience with SAP ABAP.
Master's Degree in relevant technology/industry areas.
Ability to collaborate with team members across different functional domains and technologies.
Working knowledge of emerging technologies such as Microservices, DevOps, Multi-Cloud technologies, IoT, Intelligent Automation, RPA, Test automation, AI, etc.
Working knowledge of containerizing applications and hosting in Kubernetes clusters, Azure Kubernetes Service (AKS).
Self-starter mindset with the ability to spin up and configure development and test environments.
Utilities industry experience.
Excellent interpersonal relations skills.

Technologies

C#, Java, JavaScript, TypeScript, Python
Angular, React
JSON, SQL
SAP ABAP, SAP S/4Hana
Machine Learning, Internet of Things, Artificial Intelligence
Microservices, Cloud Architecture, DevOps, Multi-Cloud technologies, RPA, Test automation
Kubernetes, Azure Kubernetes Service (AKS)
APIs

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3d ago

.NET Mainframe Developer

System One Vienna, VA 🇺🇸 Remote

Vienna, VA

3d ago

Contract Backend Developer .NET Core API

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Job Description

This remote, 12-month contract role centers on integrating distributed applications with the organization’s Core Banking platform. The successful candidate will design, develop, and deliver secure, scalable software across the full software development lifecycle, collaborating with Core Banking, testing, middleware, and platform teams. A Bachelor’s degree in Computer Science, Information Systems, or a related field and a minimum of five years of software development experience are expected.

Engagement Details

Location: Vienna, Virginia, with remote work options. Employment type: contract for twelve months.

Responsibilities

Design, build, and refine sophisticated software components that enable time-sensitive, mission-critical initiatives by integrating distributed applications with the Core Banking platform.
Act as a senior technical contributor, translating business and platform requirements into secure, scalable, and dependable solutions across the full software development lifecycle.
Work autonomously with strong technical judgment and initiative.
Partner with Core Banking, testing, middleware, and platform teams to manage dependencies, control risk, and meet tight delivery schedules.
Architect, implement, and optimize robust software using a range of modern languages and frameworks to satisfy business needs.
Engage with stakeholders to gather and analyze requirements, translate them into technical specifications, propose innovative solutions, and ensure timely task completion.
Produce clean, scalable, and maintainable code in line with industry best practices and internal coding standards.
Implement data structures and algorithms efficiently to optimize performance, scalability, and user experience.
Identify and resolve defects and runtime issues in applications.
Lead and participate in code reviews, offer constructive feedback, and learn from teammates to uphold code quality.
Take ownership of smaller initiatives and foster collaborative relationships with stakeholders, teammates, and subject matter experts.
Contribute to the development and enforcement of software policies, standards, and procedures.
Pursue ongoing learning from individuals and teams, supporting growth through collaboration and feedback.

Requirements

Bachelor’s degree in Computer Science, Information Systems, or a related field, or an equivalent combination of education, training, or experience.
Five to seven years of hands-on software development experience.
Advanced knowledge of software development principles, including Agile methodologies, CI/CD pipelines, and version control with Git and GitHub.
Proficiency with Java, XML, OpenAPI, Maven, and ANT, plus a solid understanding of modern frameworks and libraries.
Strong grasp of web technologies and architectural patterns for scalable solutions.
Solid problem-solving, analytical, and debugging abilities to tackle complex technical issues efficiently.
Excellent written and verbal communication skills for conveying technical concepts to diverse audiences.
Experience using incident tracking, project management, and change control tools.
Strong knowledge of data structures and algorithms applied to high-performance, scalable applications.
Proven experience developing applications (web, desktop, or mobile) using C#, ASP.NET, and the Microsoft technology stack.
Experience writing and maintaining unit and integration tests; able to diagnose and resolve defects.
Experience integrating data storage solutions such as SQL Server and third-party APIs into application architectures.
Familiarity with ASP.NET Core, MVC, and the broader .NET ecosystem (.NET 4.x and newer like .NET 6/8+).
Experience building web services, microservices, RESTful APIs, and applying common design patterns and REST principles.
Knowledge of CI/CD pipelines and related tooling.