Principal React Net Developer At Ion New York jobs in New York – Browse 14,418 openings on RoboApply Jobs

Principal React Net Developer At Ion New York jobs in New York

Open roles matching “Principal React Net Developer At Ion New York” with location signals for New York. 14,418 active listings on RoboApply Jobs.

14,418 jobs found

1 - 20 of 14,418 Jobs
Apply
companyLab49 logo
Full-time|On-site|New York

Join Lab49 as a Principal React/.NET Developer, where your expertise in UI technologies such as JavaScript, TypeScript, and React will play a pivotal role in shaping innovative solutions for our esteemed Financial Services clients. This position offers a unique chance to advance your career within one of the world’s most vibrant business environments. As a Principal Developer, you will be instrumental in driving transformative projects in an Agile setting, tackling complex challenges and utilizing your extensive background in front-end frameworks to design and implement the next generation of technology solutions.

Feb 13, 2026
Apply
companyLab49 logo
Full-time|On-site|New York

The Senior iOS Engineer will be pivotal in driving innovative projects for Lab49's esteemed clients. Collaborating within a dynamic and creative project team, you will engage directly with clients, allowing you to leverage your technical expertise to craft cutting-edge applications that address complex challenges while boosting efficiency and productivity for our high-profile clients.

Feb 12, 2026
Apply
companyLab49 logo
On-site|On-site|New York

Join Lab49 as a Lead UI Engineer, where you'll leverage your expertise in React to craft innovative user interfaces for top-tier financial institutions. In this pivotal role, you will collaborate within dynamic, cross-functional teams, directly engaging with clients to develop bespoke technological solutions that address complex challenges. Your contributions will drive the performance and productivity of our prestigious clients, making a significant impact on their operations.

Feb 7, 2025
Apply
companyVams logo
Full-time|On-site|New York

Join our dynamic team at Vams as a Dot Net Developer, where you'll have the opportunity to work on innovative projects that make a real impact. We are looking for a talented and motivated individual who is passionate about software development and eager to grow within our organization.Your role will involve developing, testing, and maintaining applications using the .NET framework. You will collaborate with cross-functional teams to deliver high-quality software solutions that meet business needs.

Feb 7, 2017
Apply
companyUpClear logo
Contract|$140K/yr - $190K/yr|On-site|New York, New York, United States

UpClear provides an innovative SaaS revenue management platform utilized by leading consumer goods brands globally. Our comprehensive system encompasses Trade Promotion Management, Trade Promotion Optimization, Integrated Business Planning, and Revenue Management.With over 80 brands across more than 30 countries, our growth trajectory has been impressive and consistent; we have proudly featured on the Inc 5000 list of fastest-growing private companies for nine consecutive years.Headquartered in the vibrant city of New York, UpClear also has satellite offices in London, Paris, and Singapore.We are searching for a Full Stack .Net Developer to join our tech team as a contractor, contributing to exciting and ambitious projects.This role necessitates on-site collaboration. You must be able to commute to our office located on West 22nd Street in New York.

Mar 19, 2026
Apply
companyCity of New York logo
Senior .NET Developer

City of New York

Full-time|On-site|New York City

Role overview The Senior .NET Developer will design, build, and maintain applications that help support the City of New York's services and daily operations. This work plays a direct part in how city departments serve residents and manage internal processes. What you will do Develop and maintain .NET applications used by various city departments Collaborate with teams from different disciplines to deliver solutions that address public needs Share technical expertise to help improve and modernize city services Location This role is based onsite in New York City.

Apr 25, 2026
Apply
companyNagarro logo
Full-time|On-site|New York

Join Nagarro as a Principal Engineer specializing in .Net Web technologies. In this pivotal role, you will leverage your extensive experience to lead engineering projects, driving innovation and excellence in our software solutions. Collaborate with cross-functional teams to design, develop, and implement high-quality applications that meet our clients' needs.Your expertise will guide our engineering practices, ensuring we stay at the forefront of technology trends while delivering superior performance and security. This is an opportunity to be part of a dynamic team that values creativity and technical prowess.

May 15, 2023
Apply
companyLab49 logo
On-site|On-site|New York

Join Lab49 as a Principal Tech Lead, where you will spearhead the development of cutting-edge digital products for the finance industry. As a pivotal member of a dynamic, cross-functional team, you will collaborate closely with clients, leading engineers to deliver innovative solutions for buy-side research analysts and portfolio managers. Your leadership will guide project discovery and execution, ensuring impactful contributions from day one.

Feb 3, 2026
Apply
companyAlpha Technologies Inc. logo
Contract|On-site|New York

We are seeking a skilled C#/.NET Developer to join our dynamic team at Alpha Technologies Inc. If you meet the qualifications listed below, please provide your information promptly so we can submit your application to the Hiring Manager today.Required Information:Date of birth (only date and month)Updated resumeCitizenship statusCurrent locationEducational detailsSalary expectationsThe role involves the development and enhancement of credit trading and position management infrastructure, facilitating the onboarding of trading books from various legal entities. Key responsibilities include building interfaces and transformation engines for seamless interaction with multiple systems within the organization. You will contribute to the straight-through processing of trades and coordinate positions between the firm’s Position engine and data repositories, as well as with user interface engines. The projects encompass a diverse range of products, including AG, Corp, Government, MUNI, Convertible bonds, Certificate of Deposit, and Commercial Paper.

Apr 30, 2015
Apply
companyIntegrated Resources Inc. logo
.NET Developer

Integrated Resources Inc.

Full-time|On-site|New York

Join Integrated Resources Inc. as a skilled .NET Developer, where your expertise will contribute to innovative software solutions. You will work collaboratively within a dynamic team to design, develop, and maintain high-quality applications that meet our clients' needs.

Jul 22, 2015
Apply
companyResourceful Talent Group logo
Full-time|Hybrid|New York, New York, United States

Join our team as a Principal Engineer for a leading client that offers a cutting-edge cloud-native SaaS platform designed for global creative teams. This platform utilizes AWS serverless technologies, .NET, and React/TypeScript. As a senior member of the engineering team, your primary focus will be on system architecture, scalability, and engineering leadership while also engaging in hands-on development.Key ResponsibilitiesDrive the architectural vision and modernization efforts of a large-scale SaaS platform.Enhance system scalability, performance, and reliability.Develop features using .NET and AWS services including Lambda, API Gateway, DynamoDB, and RDS.Mentor and guide backend, frontend, DevOps, QA, and offshore engineering teams.Establish and maintain engineering best practices and coding standards.Collaborate with product leadership to ensure the delivery of high-quality software releases.

Nov 14, 2025
Apply
companymergeapiintegrationsandbox logo
Full-time|On-site|Newyork

Join our dynamic team as a React.js Developer! We are seeking an innovative and skilled developer to design and implement high-performance, scalable web applications that deliver exceptional user experiences. The ideal candidate will have robust experience with modern JavaScript frameworks, particularly React.js, and a strong understanding of frontend development best practices.

Jan 23, 2026
Apply
companyLab49 logo
On-site|On-site|New York

Join our dynamic team as a Strategic Account Manager, where you will be pivotal in nurturing and expanding relationships with top-tier financial institutions. If you excel in intricate enterprise landscapes and possess the ability to engage effectively with both C-suite executives and technical teams, this opportunity is tailored for you.In this role, you will take the helm as an independent, comprehensive owner, collaborating closely with executives, delivery, and engineering teams to safeguard and enhance our critical accounts spanning banking, capital markets, and wealth/asset management.

Dec 12, 2025
Apply
companySonsoft Inc. logo
.NET Developer

Sonsoft Inc.

Full-time|On-site|New York

Join our dynamic team at Sonsoft Inc. as a skilled .NET Developer! In this role, you will collaborate with cross-functional teams to design, develop, and maintain high-quality software solutions using the .NET framework. You will be responsible for troubleshooting and optimizing existing applications, ensuring top-notch performance and user experience.We are looking for an innovative thinker who thrives in a fast-paced environment and is passionate about technology and coding. If you are eager to advance your career and work on exciting projects, we want to hear from you!

Sep 7, 2016
Apply
company360IT Professionals logo
.NET Developer

360IT Professionals

Full-time|On-site|New York

Join our dynamic team at 360IT Professionals as a .NET Developer! You will be responsible for designing, implementing, and maintaining applications that are essential to our operations. This is an exciting opportunity to work on innovative projects and technologies, contributing to our mission of delivering high-quality IT solutions.

Jul 18, 2017
Apply
company
Full-time|$110K/yr - $175K/yr|On-site|New York, New York, United States

About InfoTrackInfoTrack is a premier platform that expertly links law firms with courts and essential services for successful litigation. As a global leader in legal technology, we possess unmatched expertise in creating integrations that significantly enhance the operational efficiency of legal professionals and the judicial system.At InfoTrack, we recognize that our team is fundamental to our achievements. We are dedicated to nurturing a high-performance culture that emphasizes continuous professional growth, open dialogue, and transparent leadership. If you are intelligent, committed, and enthusiastic about developing a top-tier solution that positively impacts our clients, we invite you to join us.About the RoleAs a .NET Developer at InfoTrack, you will be instrumental in redefining the workflows of legal professionals. You will be responsible for designing and scaling backend systems, integrating advanced technologies such as LLMs and OCR, and collaborating closely with product and engineering teams to produce software that optimizes vital legal processes.Key ResponsibilitiesDevelop and maintain backend services for AI-driven document extraction, e-filing, and workflow automation.Integrate with LLM APIs, OCR tools, and court systems to ensure smooth data transmission.Write and review scalable C# code within a microservices framework.Work in tandem with PMs, partner organizations, and engineers to define and deliver features.Enhance observability for AI functionalities, including logging, metrics, and cost tracking.Stay updated on AI and document processing tools, sharing valuable insights.Contribute to shared infrastructure and participate in cross-functional development initiatives.Ensure code quality through testing, reviews, and process enhancements.Propose product improvements based on technical insights and user behavior.Assist with related tasks within a lean, high-performing team.

Nov 20, 2025
Apply
companyStripe logo
Full-time|On-site|NYC-Privy

Join Privy as a Staff SDK Engineer specializing in React and React Native. In this role, you will lead the development of innovative SDKs that empower developers and enhance user experiences. You will collaborate with cross-functional teams to design, build, and maintain high-quality software solutions.

Mar 19, 2026
Apply
companyBaton Corporation logo
Full-time|$500K/yr - $1.5M/yr|On-site|New York

About UsBaton Corporation is a pioneering technology firm responsible for developing and operating the comprehensive technology stack behind pump.fun, currently recognized as the largest memecoin launchpad in the industry. Our systems are designed for low latency and high throughput, operating under continuous load, demanding precision and expertise.Your RoleIn the capacity of Senior Staff React Native Engineer, you will be at the forefront of our mobile platform's technical evolution. Your role encompasses tackling our most challenging technical issues, guiding architectural decisions, and fostering growth among your fellow engineers, all while actively contributing to production code with remarkable efficiency.Demonstrate leadership through significant code contributions in critical areas of our mobile stack.Take ownership of complex technical projects, overseeing everything from architectural design to deployment.Define the technical vision for mobile architecture while remaining actively engaged in its implementation.Establish and refine best practices for performance, reliability, and security within a crypto-native environment.Focus on optimizing speed, efficiency, and scalability, effectively bridging blockchain interactions with mobile-first design.Collaborate closely with backend engineers to integrate APIs, real-time data streams, and decentralized technologies.Rapidly iterate—shipping features, collecting user feedback, and enhancing the mobile experience to boost engagement and user retention.Address intricate technical challenges associated with crypto wallets, smart contract interactions, and real-time data updates.Maintain a clean, modular, and scalable codebase while pushing the limits of mobile development.Work in partnership with designers, engineers, and product leaders to shape the future of our mobile platform.

Feb 12, 2026
Apply
companyCity of New York logo
Full-time|On-site|New York City

Join the City of New York as an Application Developer, where you will play a vital role in developing and maintaining cutting-edge applications that serve the city's diverse needs. In this dynamic position, you will collaborate with cross-functional teams to deliver innovative software solutions that enhance city services and improve the lives of its residents.

Apr 2, 2026
Apply
companyOmen logo
Full-time|On-site|New York City

Join Omen as a Frontend Web Developer and spearhead our web development initiatives, crafting innovative products from concept to launch. Collaborate closely with cross-disciplinary teams including design, product management, and internal platforms to deliver impactful features within dynamic product teams.As an integral member of our Genesis team, you'll contribute to developing a world-class tokenization and fund administration experience for Omen Genesis.Your ResponsibilitiesDevelop high-quality, performant web applications using React, TypeScript, and CSS-in-JS.Embrace ownership of features from design through implementation, serving as the web development expert.Enhance tools that streamline Omen's operations, wielding influence across the organization.Work in tandem with design and product professionals to quickly iterate and launch financial products.Create frameworks and abstractions that significantly empower fellow developers.Engage in backend development using TypeScript and AWS when necessary.Your QualificationsMinimum of 2 years of professional experience with modern web technologies and frameworks.Proficient in writing and debugging JavaScript in both Node.js and browser environments.Passionate about creating an exceptional developer experience.Demonstrated success in leading and delivering large-scale technical projects.Consistently uphold high standards for code quality, advocate for best testing practices, and enhance code review processes.Highly Preferred: Strong backend experience and knowledge, particularly in system design and high-performance backend systems, with familiarity in cloud interactions (potential for a full-stack role).

Dec 20, 2025

Sign in to browse more jobs

Create account — see all 14,418 results

Tailoring 0 resumes

We'll move completed jobs to Ready to Apply automatically.