Explore 2 javascript typescript engineer react jobs from 2 hiring companies in Warrenton, MO, US. Filter by remote, salary, experience, and company, then open any listing to apply.

javascript-typescript-engineer-react

Javascript Typescript Engineer React

Wentzville

Troy

Lake Saint Louis

Washington

O'Fallon

Saint Peters

Dardenne Prairie

Wildwood

Chesterfield

Wright City

Saint Charles

Ballwin

Union

Manchester

Maryland Heights

Creve Coeur

Hazelwood

Florissant

Kirkwood

Javascript Typescript Engineer React Jobs

Boeing

Mastercard

Hybrid

Our PurposeMastercard powers economies and empowers people in 200&#43; countries and territories worldwide. Together with our customers, we’re helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential.Title and Summary<h3></h3>Software Engineer II<h3></h3>Overview: The Infrastructure Design Engineering Automation (IDEA) team at Mastercard is looking for a Software Engineer II with a focus on front-end development to join as a hands-on individual contributor. In this role, you’ll work on well-defined problems while contributing to scalable, user-focused solutions. You’ll participate in design discussions, collaborate across teams, and take ownership of delivering high-quality, reliable code. The IDEA team builds internal tools that help infrastructure and platform teams do their work faster and more consistently. Our tools support how technical designs are created, reviewed, and turned into usable outputs for other teams and automation. One of our main applications is RAA, a web‑based tool used to create and manage technical architecture designs. We focus on usability, reliability, and gradual automation, working closely with engineers, architects, and platform teams. This is a hybrid position based in O’Fallon, MO requiring three days per week onsite. Role: •	Contribute to the development of front-end features using modern frameworks. •	Improve existing code for clarity, performance, and maintainability. •	Troubleshoot issues and support production systems as needed. •	Assist in building responsive, user-friendly web applications. •	Support testing, debugging, and troubleshooting of applications. •	Participate in code reviews and contribute to technical design discussions. •	Write unit tests and maintain clear, concise documentation. •	Collaborate with cross-functional teams to understand requirements and deliver solutions. •	Continuously learn and apply new technologies and development techniques. All About You: •	Experience in software engineering or application development, with a focus on front-end technologies •	Foundational knowledge of JavaScript, TypeScript, and React. •	Basic understanding of web development concepts (HTML, CSS, APIs) •	Familiarity with version control systems (e.g., Git) •	Familiarity with Agile methodologies (Scrum or Kanban) and iterative delivery models •	Comfortable working across the full software development lifecycle (build, test, release, support) •	Experience with modern development tools (version control, CI/CD pipelines, code reviews, issue tracking systems) •	Exposure to professional web application development is preferred. •	Strong problem-solving skills and a passion for building user-centric solutions. •	Self-motivated, proactive, and able to work independently in a collaborative environment. •	Strong communication skills, with the ability to explain technical concepts clearly. •	Bachelor degree in Computer Science, Software Engineering, Information Technology, Mathematics, or a related field. Equivalent practical experience may also be considered. This role is not eligible for Mastercard’s work authorization sponsorship. As such, candidates must be eligible to work in the United States, now as well as in the future, without employer sponsorship.<h3></h3>Mastercard is a merit-based, inclusive, equal opportunity employer that considers applicants without regard to gender, gender identity, sexual orientation, race, ethnicity, disabled or veteran status, or any other characteristic protected by law. We hire the most qualified candidate for the role. In the US or Canada, if you require accommodations or assistance to complete the online application process or during the recruitment process, please contact reasonable_accommodation@mastercard.com and identify the type of accommodation or assistance you are requesting. Do not include any medical or health information in this email. The Reasonable Accommodations team will respond to your email promptly.<h3></h3>Corporate Security Responsibility All activities involving access to Mastercard assets, information, and networks comes with an inherent risk to the organization and, therefore, it is expected that every person working for, or on behalf of, Mastercard is responsible for information security and must:<ul><li>Abide by Mastercard’s security policies and practices;</li><li>Ensure the confidentiality and integrity of the information being accessed;</li><li>Report any suspected information security violation or breach, and</li><li>Complete all periodic mandatory security trainings in accordance with Mastercard’s guidelines.</li></ul><h3></h3>In line with Mastercard’s total compensation philosophy and assuming that the job will be performed in the US, the successful candidate will be offered a competitive base salary and may be eligible for an annual bonus or commissions depending on the role. The base salary offered may vary depending on multiple factors, including but not limited to location, job-related knowledge, skills, and experience. Mastercard benefits for full time (and certain part time) employees generally include: insurance (including medical, prescription drug, dental, vision, disability, life insurance); flexible spending account and health savings account; paid leaves (including 16 weeks of new parent leave and up to 20 days of bereavement leave); 80 hours of Paid Sick and Safe Time, 25 days of vacation time and 5 personal days, pro-rated based on date of hire; 10 annual paid U.S. observed holidays; 401k with a best-in-class company match; deferred compensation for eligible roles; fitness reimbursement or on-site fitness facilities; eligibility for tuition reimbursement; and many more. Mastercard benefits for interns generally include: 56 hours of Paid Sick and Safe Time; jury duty leave; and on-site fitness facilities in some locations.Pay RangesO'Fallon, Missouri: $92,000 - $147,000 USD<h3></h3><h3></h3><h3></h3><h3></h3>

Software Engineer II

Front-end software engineer with React, TypeScript, JavaScript; knowledge of HTML/CSS and APIs; experience with Agile, Git, CI/CD; bachelor’s in CS or related field.

Full Stack Palantir Foundry DeveloperCompany:The Boeing CompanyBoeing Defense Space &amp; Security (BDS) is seeking an experienced Full Stack Foundry Engineer to join the Digital Launchpad (DLP) team. This role will own the end-to-end delivery of enterprise-scale Palantir Foundry applications that convert raw data into operational decision interfaces and digital twins. The engineer will design and implement Ontology-backed solutions, build high-performance data pipelines, and craft immersive user experiences using Foundry Workshop/Slate and custom React/TypeScript widgets. This position is located in Arlington, VA, or Chicago, IL, or Denver, CO, or, El Segundo, CA, or Ridley Park, PA or, Saint Louis, MO or Seattle, WA.You will collaborate with cross-functional teams (data scientists, domain SMEs, security, and platform engineering) to ensure solutions meet governance, lineage, performance, and security requirements in a regulated DLP environment.Key Responsibilities<ul><li>Design, development, test, and deployment of Palantir Foundry applications that deliver operational value end-to-end</li><li>Model enterprise Ontology artifacts represent business entities and workflows</li><li>Build and optimize data pipelines and transform using Python/PySpark within Foundry</li><li>Configure and mature Workshop applications</li><li>Integrate with external systems and APIs (RESTful services, JDBC, S3/Parquet) and manage Data Connections</li><li>Implement automated testing (unit/integration)</li><li>Document technical designs and maintain knowledge artifacts in Foundry Resource Folders, translate SME requirements into Foundry artifacts</li></ul>Required Qualifications<ul><li>Bachelor’s degree in computer science, Software Engineering, Data Engineering, or equivalent experience 5&#43; years of experience in full-stick software development?</li><li>5&#43;years of experience do you have with C/C&#43;&#43; coding or java/python script development?</li><li>3&#43; years of experience do you have with taxonomy and ontology development</li><li>5&#43; years of experience in web based development, leveraging ReactJS, Redux, JavaScript, TypeScript, HTML, CSS?</li></ul>Preferred Qualifications<ul><li>Familiarity with manufacturing, engineering, supply chain or quality data domains</li><li>Experience in Aerospace &amp; Defense, understanding industry-specific data challenges and requirements</li><li>Familiarity with Foundry application suite: Workshop, Object Views, Slate, and related UX patterns</li><li>Experience with version control (Git), automated testing frameworks, and CI/CD pipelines within Foundry or equivalent platforms</li></ul>Typical Education/Experience:Education/experience typically acquired through advanced technical education (e.g. Bachelor) and typically 5 or more years&#39; related work experience or an equivalent combination of technical education and experience (e.g. PhD, Master&#43;3 years&#39; related work experience, 6years&#39; related work experience, etc.)Conflict of Interest:Successful candidates for this job must satisfy the Company’s Conflict of Interest (COI) assessment process.Relocation:Relocation assistance is not a negotiable benefit for this position. Candidates must live in the immediate area or relocate at their own expense.Travel:Position may require travel up to 10% of the time.Drug Free Workplace:Boeing is a Drug Free Workplace where post offer applicants and employees are subject to testing for marijuana, cocaine, opioids, amphetamines, PCP, and alcohol when criteria is met as outlined in our policies.Pay &amp; Benefits:At Boeing, we strive to deliver a Total Rewards package that will attract, engage and retain the top talent. Elements of the Total Rewards package include competitive base pay and variable compensation opportunities. The Boeing Company also provides eligible employees with an opportunity to enroll in a variety of benefit programs, generally including health insurance, flexible spending accounts, health savings accounts, retirement savings plans, life and disability insurance programs, and a number of programs that provide for both paid and unpaid time away from work. The specific programs and options available to any given employee may vary depending on eligibility factors such as geographic location, date of hire, and the applicability of collective bargaining agreements.Pay is based upon candidate experience and qualifications, as well as market and business considerations.Summary pay range: $148,750-$215,050Language Requirements:Not ApplicableEducation:Not ApplicableRelocation:This position offers relocation based on candidate eligibility.Export Control Requirement:This position must meet U.S. export control compliance requirements. To meet U.S. export control compliance requirements, a “U.S. Person” as defined by 22 C.F.R. §120.62 is required. “U.S. Person” includes U.S. Citizen, U.S. National, lawful permanent resident, refugee, or asylee.Safety Sensitive:This is not a Safety Sensitive Position.Security Clearance:This position does not require a Security Clearance.Visa Sponsorship:Employer will not sponsor applicants for employment visa status.Contingent Upon Award ProgramThis position is not contingent upon program awardShift:Shift 1 (United States of America)Stay safe from recruitment fraud! The only way to apply for a position at Boeing is via our Careers website. Learn how to protect yourself from recruitment fraud - <a href="http://www.boeing.com/careers/recruitment-fraud-warning.page" target="_blank">Recruitment Fraud Warning</a><div><div><div><div>Boeing is an Equal Opportunity Employer. Employment decisions are made without regard to race, color, religion, national origin, gender, sexual orientation, gender identity, age, physical or mental disability, genetic factors, military/veteran status or other characteristics protected by law.<a href="http://www.boeing.com/resources/boeingdotcom/careers/footer/EEOIsTheLawPoster.pdf" target="_blank">EEO is the law</a><a href="https://tbcdn.talentbrew.com/company/185/v1_0/img/2018_Policy_Statement.pdf" target="_blank">Boeing EEO Policy</a><a href="http://www.boeing.com/careers/request-accommodation.page" target="_blank">Request an Accommodation</a><a href="http://www.boeing.com/careers/privacy-statement.page" target="_blank">Applicant Privacy</a> Boeing Participates in E – Verify<ul><li><a href="http://www.boeing.com/resources/boeingdotcom/careers/footer/EverifyPosterEnglish.pdf" target="_blank">E-Verify (English) </a></li><li><a href="http://www.boeing.com/resources/boeingdotcom/careers/footer/EverifyPosterSpanish.pdf" target="_blank">E-Verify (Spanish) </a></li></ul>Right to Work Statement <ul><li><a href="http://www.boeing.com/resources/boeingdotcom/careers/footer/WebBPPOSTERRtoWEnglishversion.pdf" target="_blank">Right to Work (English) </a></li><li><a href="http://www.boeing.com/resources/boeingdotcom/careers/footer/WebBPPOSTERRtoWSpanishversion.pdf" target="_blank">Right to Work (Spanish)</a></li></ul></div></div></div></div>

Full Stack Palantir Foundry Developer

Bachelor's degree in CS/Software/Data Eng or related field; 5+ years full-stack software development; 5+ years React/JavaScript/TypeScript; 3+ years ontology/taxonomy development; 5+ years web development with ReactJS/Redux/JS/TS/HTML/CSS

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Javascript Typescript Engineer React Jobs in Warrenton, MO, US

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