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Semantic Web Developer Jobs (NOW HIRING)

LED FastStart

Senior Web Developer

Baton Rouge, LA · On-site

We're looking for a Senior Web Developer who cares as much about craft as they do about curiosity ... semantic HTML best practices - Integrate third-party APIs, headless data sources, and custom data ...

Platinum Technologies

Senior Developer

Herndon, VA · On-site

$56 - $74/hr

The Senior Developer serves as a senior technical contributor responsible for developing secure ... Implement software solutions utilizing Semantic Web technologies, including RDF, OWL, and SPARQL ...

Platinum Technologies

Senior Developer

Herndon, VA

$56 - $74/hr

The Senior Developer serves as a senior technical contributor responsible for developing secure ... Implement software solutions utilizing Semantic Web technologies, including RDF, OWL, and SPARQL ...

AHU Technologies, Inc.

Drupal Web Developer

Washington, DC · On-site

$54 - $59/hr

Client requires the services of a contractor Web Developer with strong Drupal expertise to support ... Required Technical Skills HTML & Markup • Strong command of semantic HTML5: sectioning elements ...

AHU Technologies Inc

Drupal Web Developer

Washington, DC · On-site

$54 - $59/hr

Client requires the services of a contractor Web Developer with strong Drupal expertise to support ... Strong command of semantic HTML5: sectioning elements, headings hierarchy, lists, tables, and forms.

Platinum Technologies

Senior Developer

Herndon, VA

$56 - $74/hr

The Senior Developer serves as a senior technical contributor responsible for developing secure ... Implement software solutions utilizing Semantic Web technologies, including RDF, OWL, and SPARQL ...

Vantor

Ontology Engineer (TS/SCI)

Herndon, VA · On-site

$137K - $200K/yr

Leveraging Semantic Web standards, including RDF, OWL, and SPARQL, the Lead Ontologist develops ... Collaborate with analysts, data scientists, engineers, and Government stakeholders to capture ...

Sierra

Web Developer, Marketing Site

San Francisco, CA · On-site

$230K - $290K/yr

This includes building features in the web app and also collaborating on our website to keep ... You'll champion semantic markup, keyboard navigation, screen-reader support, and WCAG-minded ...

New

Maxar

Ontology Engineer (TS/SCI)

Herndon, VA · On-site

Leveraging Semantic Web standards, including RDF, OWL, and SPARQL, the LeadOntologistdevelops ... Collaborate with analysts, data scientists, engineers, and Government stakeholders to capture ...

Vantor

Ontology Engineer (TS/SCI)

Herndon, VA · On-site

Leveraging Semantic Web standards, including RDF, OWL, and SPARQL, the Lead Ontologist develops ... Collaborate with analysts, data scientists, engineers, and Government stakeholders to capture ...

Maxar

Senior Ontology Developer (TS/SCI)

Herndon, VA

$56 - $74/hr

The Senior Developer serves as a senior technical contributor responsible for developing secure ... Implement software solutions utilizing Semantic Web technologies, including RDF, OWL, and SPARQL ...

Vantor

Ontology Engineer (TS/SCI with CI Poly)

Herndon, VA · On-site

$137K - $200K/yr

Leveraging Semantic Web standards, including RDF, OWL, and SPARQL, the Lead Ontologist develops ... Collaborate with analysts, data scientists, engineers, and Government stakeholders to capture ...

Vantor

Database Engineer (TS/SCI)

Herndon, VA · On-site

The Database Engineer serves as the technical authority for the design, implementation ... This position develops scalable data architectures that support Semantic Web technologies ...

Maxar

Database Engineer (TS/SCI)

Herndon, VA · On-site

The Database Engineer serves as the technical authority for the design, implementation ... This position develops scalable data architectures that support Semantic Web technologies ...

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Semantic Web Developer information

See salary details

$49.5K

$117.9K

$241K

How much do semantic web developer jobs pay per year?

As of Aug 16, 2026, the average yearly pay for semantic web developer in the United States is $117,880.00, according to ZipRecruiter salary data. Most workers in this role earn between $80,000.00 and $128,000.00 per year, depending on experience, location, and employer.

What is a semantic web developer?

A Semantic Web Developer is a software professional who creates applications and systems that leverage the Semantic Web, a set of technologies designed to make data on the internet machine-readable and interoperable. They use standards like RDF (Resource Description Framework), OWL (Web Ontology Language), and SPARQL to structure data and enable intelligent data integration and sharing. Semantic Web Developers often work on projects involving linked data, knowledge graphs, and artificial intelligence to enhance how information is connected and understood by machines. Their work helps improve search, data discovery, and automation across diverse domains.

What are the key skills and qualifications needed to thrive as a semantic web developer?

To thrive as a Semantic Web Developer, you need a solid background in computer science, expertise in semantic technologies (such as RDF, OWL, and SPARQL), and experience with web development languages like JavaScript or Python. Familiarity with ontology editors (like Protégé), triple stores (such as Apache Jena or Virtuoso), and relevant W3C standards is typically required. Strong analytical thinking, problem-solving skills, and the ability to communicate complex concepts clearly set outstanding candidates apart. These competencies are vital for building interoperable, intelligent web systems that efficiently manage and leverage structured data.

What is the difference between Semantic Web Developer vs Web Developer?

AspectSemantic Web DeveloperWeb Developer
Required SkillsSemantic web technologies, RDF, OWL, SPARQL, ontologiesHTML, CSS, JavaScript, frameworks like React or Angular
Work EnvironmentResearch, data integration, knowledge graphsWebsite and application development
Industry UsageData-driven industries, AI, knowledge managementMedia, e-commerce, corporate websites

Semantic Web Developers focus on creating intelligent, data-rich web applications using semantic technologies, while Web Developers primarily build and maintain standard websites and applications. Both roles require coding skills, but their focus areas differ significantly, with Semantic Web Developers working more with data integration and ontologies.

What are the most common challenges faced by semantic web developers when integrating ontologies with existing data sources?

Semantic Web Developers often encounter challenges when mapping and integrating diverse data sources into a unified ontology. These can include inconsistencies in data formats, incomplete metadata, and aligning different vocabularies or schemas. Overcoming these issues typically requires strong analytical skills, familiarity with RDF and OWL standards, and close collaboration with data owners and subject matter experts to ensure semantic accuracy. Regular communication and iterative testing are essential for successful integration and to maintain data integrity across systems.
More about Semantic Web Developer jobs

What job categories do people searching Semantic Web Developer jobs look for?

The top searched job categories for Semantic Web Developer jobs are:

Semantic Web Developer jobs near you
Infographic showing various Semantic Web Developer job openings in the United States as of August 2026, with employment types broken down into 1% Internship, 81% Full Time, 10% Part Time, 1% Temporary, and 7% Contract. Highlights an 82% Physical, 4% Hybrid, and 14% Remote job distribution, with an average salary of $117,880 per year, or $56.7 per hour.

Senior Web Developer

LED FastStart

Baton Rouge, LA • On-site

Full-time

Medical, Dental

Re-posted 2 days ago

Job description

MESH is a creative brand agency that believes true partnerships drive everything we do. For over 20 years, we've combined deep listening with strategic thinking and collaborative creativity to deliver work that moves the needle forward for our clients.

We're looking for a Senior Web Developer who cares as much about craft as they do about curiosity. You see every project as a chance to do it better. You lose sleep over accessibility (in the best way). You're already experimenting with AI-assisted development and excited to help define what that looks like in a real agency workflow. And you want to be part of conversations, not just handed tickets.

What You'll Do

Build & Architect

- Design and develop custom WordPress themes using modern PHP best practices; Timber/Twig, ACF Pro, and block-based architecture

- Build in Webflow when it's the right tool for the job or fits the client's needs

- Ensure every build meets WCAG 2.1 AA, Core Web Vitals standards, and semantic HTML best practices

- Integrate third-party APIs, headless data sources, and custom data layers

Oversee & Elevate Quality

- Review and give constructive feedback on work from outsourced contributors

- Establish coding standards, documentation practices, and QA processes for the team

- Conduct performance audits and implement fixes for load time, query efficiency, and rendering bottlenecks

Plan & Collaborate

- Join client discovery and scoping calls to define technical requirements and level of effort

- Develop sprint plans with account and project management teams

- Translate Figma designs into precise, responsive, performant front-end experiences

Push the Craft Forward

- Lead MESH's exploration of AI-assisted development, we use Claude Code and are actively shaping our vibe coding workflow

- Evaluate and advocate for tools and workflows that meaningfully improve how we build

- Help evolve CI/CD pipelines and deployment practices across client environments

What You Bring

Required

- 3-5 years of professional WordPress development, including custom theme development

- Strong PHP proficiency with modern best practices

- Hands-on experience with Timber/Twig, ACF Pro, and Gravity Forms

- Solid HTML, CSS, and JavaScript fundamentals, Git, and version-controlled workflows

- Deep commitment to web accessibility, you know WCAG, apply it, and advocate for it

- Familiarity with performance optimization and Core Web Vitals

- Comfortable on client-facing calls and scoping conversations

Preferred

- Webflow project experience

- Agency background managing multiple client projects simultaneously

- CI/CD and deployment tooling (GitHub Actions, DeployHQ, WP Engine, etc.)

- Google Analytics, Search Console, and Tag Manager Experience

- Experience with Figma and design handoffs

- Knowledge of Craft CMS, Drupal or other open source CMS platforms

- Experience with AI coding tools (Claude Code, Cursor, Copilot, or similar)

Requirements

- Candidate must be able to present valid U.S. Work Authorization documents

- Candidate must demonstrate verbal and written mastery of the English language

- Candidate may be required to travel to attend in-person meetings with clients (such as Louisiana, Alabama, and Georgia)

- If remote, quarterly travel to headquarters for in-person group check-ins

- Working hours are Central Standard Time

Why MESH

We offer competitive compensation, strong benefits, and a hybrid working environment. More than that, a team that goes all in, tells the truth, and genuinely has fun doing the work. If you want a place where your craft is valued and your curiosity is rewarded, let's talk.

Apply