Senior JavaScript Developer jobs in Hartford, CT

Actimize IFM Developer / JavaScript Developer

Remote

•

5d ago

Position: Actimize IFM Developer / JavaScript Developer Location: Remote USA Experience: 10+ Years Employment: W2/C2C Visa: // H1B Required Skills: 3+ years of hands-on experience with NICE Actimize IFM Strong JavaScript, HTML, CSS, and API integration skills Experience with AIS, RCM, IFM-X, and Case Management Development of fraud detection strategies, business rules, thresholds, and monitoring scenarios Alert generation, case management, and transaction monitoring Strong SQL skills with

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Third Party, Contract

Depends on Experience

Remote Senior JavaScript/React Engineer

Remote

•

Today

AboutUs: BasedinSanFrancisco,California,TuringistheworldsleadingresearchacceleratorforfrontierAIlabsandatrustedpartnerforglobalenterprisesdeployingadvancedAIsystems.Turingsupportscustomersintwoways:first,byacceleratingfrontierresearchwithhigh-qualitydata,advancedtrainingpipelines,plustopAIresearcherswhospecializeinsoftwareengineering,logicalreasoning,STEM,multilinguality,multimodality,andagents;andsecond,byapplyingthatexpertisetohelpenterprisestransformAIfromproofofconceptintoproprietaryintellig

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Contract

200 - 300

Actimize IFM (Integrated Fraud Management) Developer / JavaScript Developer

Remote

•

Yesterday

Job Title - Actimize IFM (Integrated Fraud Management) Developer / JavaScript Developer Job Location - San Antonio, Texas,78249 Location: Remote Duration: 11 months Job Summary We are seeking an experienced Actimize IFM Developer with strong JavaScript development skills to design, develop, enhance, and support fraud detection and anti-financial crime solutions. The ideal candidate will have hands-on experience in NICE Actimize IFM platform, rule development, alert generation, case management,

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Contract

42 - 45

*Senior Full Stack Engineer (Backend focused - Nodejs, Javascript, AWS exp.) - W2 role

Remote

•

Today

Kellton Tech is a full-service software development company, offering end-to-end IT solutions, strategic technology consulting and product development services in Web, SMAC (Social, Mobile, Analytics, Cloud), ERP-BPM, and IoT space Our methodology of inventing infinite possibilities with technology helps us develop best in-class and cost effective solutions for our clients. Currently Kellton Tech is looking for talented resources for one of our listed client. Below are the position details Posi

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Contract, Third Party

Depends on Experience

Senior Staff Software Engineer, JavaScript Runtime & Compilers

Remote or San Diego, California

•

Today

Company Description It all started when engineer Fred Luddy wrote code that automated a tedious task for his coworker, Phyllis. She cried tears of joy. That moment inspired Fred to build a company that could do that for everyone-freeing people from busywork so they could focus on meaningful work. Today, ServiceNow is the AI control tower for business reinvention. Our ServiceNow AI platform brings together any AI, any data, and any workflow- helping 85% of the Fortune 500 work smarter, faster,

Full-time

USD 171,900.00 - 300,800.00 per year

Senior JavaScript Test Automation Engineer

Remote

•

Today

We are looking for a Senior Test Automation Engineer with strong experience in JavaScript- or TypeScript-based automation frameworks. The ideal candidate should have hands-on experience building and maintaining automated tests for modern web applications and APIs, with a strong focus on quality, reliability, and maintainability. This role requires solid automation experience, strong testing fundamentals, and the ability to collaborate effectively with development, product, and QA teams. Responsi

Full-time

Senior React & Node Developer

Remote

•

14d ago

Are you a talented Senior Developer looking for a remote job that lets you show your skills and get decent compensation? Look no further than the marketplace that connects you with hand-picked startups in the US and Europe. What we offer: The rate depends on your seniority level, skills and experience. We've already paid out over $11M to our engineers.No more hunting for clients or negotiating rates let us handle the business side of things so you can focus on what you do best.We'll manually fi

Contract

75000 - 199000

Senior Performance Engineer- JMeter, JavaScript - Remote

Remote

•

Today

Maximus is currently seeking a Senior Performance Engineer.The Senior Performance Engineer leads performance engineering activities across large-scale healthcare technology programs. This role defines performance test strategies, develops and maintains performance testing frameworks, creates realistic workload models, and evaluates application scalability, reliability, stability, and capacity. The engineer partners with Development, Architecture, DevOps, Cloud Engineering, Database Administratio

Full-time

Depends on Experience

Senior Web Developer

Remote

•

Today

Overview Cotiviti is a leading solutions and analytics company that leverages unparalleled clinical and financial datasets to deliver deep insight into the performance of the healthcare system. These insights uncover new opportunities for healthcare organizations to collaborate to improve their financial performance, reduce inefficiency, and improve healthcare quality. The Sr Web Developer is primarily responsible for the support of the existing software applications and enhance software compo

Full-time

USD 112,000.00 - 124,000.00 per year

Senior Full Stack .NET Developer

Remote

•

Today

Job Title: Senior Full Stack .NET Developer Job Location: Remote Job Type: Full Time Job Description: Develop scalable web applications using .NET and ASP.NET Core. Build responsive frontend applications using React or Angular with TypeScript. Develop REST APIs and backend services using C#. Work with Entity Framework Core, SQL Server, and Azure SQL. Integrate applications with external APIs and enterprise systems. Implement authentication, authorization, logging, caching, and error handling.

Full-time

Senior ReactJS/ UI Developer

Remote

•

5d ago

Senior ReactJS/ UI Developer Location: Remote Duration: Long-term Contract Responsibilities and Qualifications: Strong experience (6+ years) in UI development building scalable and high-performance web applications.Strong expertise in HTML5, CSS3, JavaScript (ES6+), jQuery, JSON, and Bootstrap, ReactJS.Strong hands-on experience building reusable UI components, widgets, and dynamic user interfaces.Expertise in ReactJS development including Components, Hooks, Forms, Events, Routing, Redux state

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Contract

50 - 55

Senior Ruby on Rails Developer

Remote

•

18d ago

Role: Senior Ruby on Rails Developer Location: Remote Duration: Longterm Experience: 7+ Years Key Requirements: Strong Ruby on Rails and JavaScript/TypeScript experience REST APIs, distributed systems, and SQL (SQL Server/PostgreSQL) Kafka/Confluent and event-driven architecture preferred Azure/Google Cloud Platform, CI/CD, and automated testing Production monitoring and troubleshooting; Datadog preferred Enterprise application support, modernization, and migration experience Ability

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Third Party, Contract

$65 - $70

Senior Full-stack Developer

Remote

•

14d ago

Are you a talented Senior Developer looking for a remote job that lets you show your skills and get decent compensation? Look no further than the marketplace that connects you with hand-picked startups in the US and Europe. We only accept applications submitted through the link provided at the job listing. Please apply here.What we offer: The rate depends on your seniority level, skills and experience. We've already paid out over $11M to our engineers.No more hunting for clients or negotiating

Contract

85000 - 199000

Lead Front End Developer

Remote or Tampa, Florida

•

Today

RESPONSIBILITIES: Kforce has a client that is seeking a Lead Front End Developer in Tampa, FL. Key Tasks: * Design and develop modern, responsive web applications using JavaScript/TypeScript and frameworks such as Vue.js, React, or Angular * Build scalable, reusable front-end components and modernize existing applications * Troubleshoot complex issues across applications, APIs, databases, and system integrations * Contribute to architecture, technical design, coding standards, and code reviews

Full-time

$125,000 - $140,000 annually

Senior Software Engineer I- Fullstack

Remote

•

Today

As a Senior Software Engineer I - EHR Integrations, Fullstack, you are someone who has experience building "0 to 1 products'', and you thrive in an ambiguous environment. As the Sr. SWE I on the team, you will be taking Aledade's world class point of care insights (Dx suggestions, analytics, care suggestions) one step closer to the Electronic Health Record (EHR) systems that our partner practices use for patient management! You will be building cutting-edge full stack applications, built on top

Full-time

USD 134,000.00 - 182,000.00 per year

Senior Frontend Engineer

Remote

•

Today

At ClickUp, we're building the future of work: the first truly converged AI workspace unifying tasks, docs, chat, calendar, and enterprise search, all supercharged by context-driven AI. We are an AI-native company. Every team member is expected to leverage AI daily, and we evaluate AI fluency as part of our hiring process. Join us and help redefine what's possible. Role Overview We're looking for a Senior Frontend Engineer to help build and improve core product experiences at ClickUp. You'll wo

Full-time

USD 160,000.00 - 210,000.00 per year

Software Engineer Senior

Remote

•

Today

Job ID: 2618148 Location: Remote Work, VA, US Date Posted: 2026-11-05 Category: Software Subcategory: SW Engineer Schedule: Full-Time Shift: Day Job Travel: Yes - 10% of the time Minimum Clearance Required: None Clearance Level Must Be Able to Obtain: Secret Potential for Remote Work: ORA_REMOTE Description SAIC's STG is seeking a talented and motivated Senior Front-End Software Engineer to support the Department of Veterans Affairs (VA). In this role, you will design, develop, and ma

Full-time

USD 80,001.00 - 120,000.00 per year

Web Engineer III

Remote or Austin, Texas

•

Today

ABOUT onX We're a team of builders, adventurers, and risk takers using technology to help people confidently explore the outdoors. Driven by our mission to awaken the adventurer inside everyone, we build products that optimize every outdoor experience and inspire confidence to get out and go further. We're a high-growth tech company. The pace is fast, the work takes grit, and ambiguity is part of the job. As the world changes around us, we adapt - continuously evolving how we build, prioritize

Full-time

USD 130,000.00 - 153,000.00 per year

Enterprise Application Engineer/ Fullstack JavaScript Engineer (Onsite in Nashville - Require or USC)

Remote or Nashville, Tennessee

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7d ago

Position SummaryThe Enterprise Application Engineer will design, build, test, release, and support enterprise applications and automation solutions. The role focuses on hands-on UI and application development, API integration, Git-based software development, code review, troubleshooting, and continuous improvement. Initial assignments will include solutions connected to the ServiceNow AI BPO program, but prior ServiceNow experience is not required. The successful candidate will apply broadly tra

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Full-time, Third Party

70 - 80

Test Automation Architect (JavaScript / Python)

Remote

•

Today

Join our Testing Competency Center as a Test Automation Architect and drive modern automation strategies with a strong focus on JavaScript or Python ecosystems . You will play a key role in shaping scalable automation solutions and integrating AI into the SDLC. Responsibilities Design and implement end-to-end test automation architectures using JavaScript and Python Define automation strategies, including framework selection, tooling, and infrastructure setup Build and scale automation from scra

Full-time

Senior JavaScript Developer jobs in Hartford, CT, USA