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Online Mern Stack Developer Jobs in Renton, WA (NOW HIRING)

OpenAI

Software Engineer, Habitat (Online Data)

Seattle, WA · On-site

$266K - $445K/yr

As OpenAI's scale and product requirements evolve, Habitat is becoming a full-stack, one-size-fits ... Provisioning and developer experience * APIs and guardrails * Scaling, performance, and reliability

Mannik Smith Group

Senior Web Developer

Seattle, WA · On-site

$100 - $125/hr

The role combines full-stack development, systems integration, technical problem-solving, QA/QC, ... Integrate GIS data and web mapping platforms (ArcGIS Online/Portal, ArcGIS Feature Services ...

Trilon Group

Senior Web Developer

Seattle, WA · On-site

$101K - $111K/yr

The role combines full-stack development, systems integration, technical problem-solving, QA/QC, ... Integrate GIS data and web mapping platforms (ArcGIS Online/Portal, ArcGIS Feature Services ...

Trilon

Senior Web Developer

Seattle, WA · On-site

The role combines full-stack development, systems integration, technical problem-solving, QA/QC, ... Integrate GIS data and web mapping platforms (ArcGIS Online/Portal, ArcGIS Feature Services ...

Nintendo

DevOps Engineer

Redmond, WA · Hybrid

$59 - $81/hr

This role is part of the Digital Marketing department, supporting Nintendo's online web ... stack includes Terraform, AWS, Fastly, Sentry, etc. DESCRIPTION OF DUTIES * Designs, builds and ...

Nintendo

DevOps Engineer

Redmond, WA · On-site

$108K - $173K/yr

This role is part of the Digital Marketing department, supporting Nintendo's online web ... stack includes Terraform, AWS, Fastly, Sentry, etc. DESCRIPTION OF DUTIES * Designs, builds and ...

Otter

Senior Software Engineer - Seattle, WA

Seattle, WA · On-site

$139K - $183K/yr

Otter is a company dedicated to helping restaurateurs succeed in online food delivery through ... stack product features with end to end ownership: React/TypeScript UI in Fiber micro-frontends ...

Otter

Senior Software Engineer

Seattle, WA · On-site

$167K - $230K/yr

... online food delivery. Restaurants around the world, both large and small, including Chick-fil-A ... Ship full-stack product features with end to end ownership : React/TypeScript UI in Fiber micro ...

Otter

Senior Software Engineer

Seattle, WA · On-site

$167K - $230K/yr

... online food delivery. Restaurants around the world, both large and small, including Chick-fil-A ... Ship full-stack product features with end to end ownership : React/TypeScript UI in Fiber micro ...

ATOMS Careers page

Senior Software Engineer

Seattle, WA · On-site

$167K - $230K/yr

... online food delivery. Restaurants around the world, both large and small, including Chick-fil-A ... Ship full-stack product features with end to end ownership : React/TypeScript UI in Fiber micro ...

ATOMS Careers page

Senior Software Engineer

Seattle, WA · On-site

$167K - $230K/yr

... online food delivery. Restaurants around the world, both large and small, including Chick-fil-A ... Ship full-stack product features with end to end ownership : React/TypeScript UI in Fiber micro ...

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As of Sep 9, 2026, the average hourly pay for online mern stack developer in Renton, WA is $66.66, according to ZipRecruiter salary data. Most workers in this role earn between $55.43 and $76.78 per hour, depending on experience, location, and employer.

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Infographic showing various Online Mern Stack Developer job openings in Renton, WA as of August 2026, with employment types broken down into 64% Full Time, 32% Part Time, 1% Temporary, and 3% Contract. Highlights an 83% Physical, 1% Hybrid, and 16% Remote job distribution, with an average salary of $138,648 per year, or $66.7 per hour.

Software Engineer, Habitat (Online Data)

Seattle, WA • On-site

OpenAI
Scientific Research and Development Services • 201 - 500 employees
Learn more about OpenAIexternal

$266K - $445K/yr

Full-time

Re-posted yesterday

Job description

About the team
Online Data builds and operates Habitat, the single product surface of Online Data and the system of record for OpenAI's online user data. As OpenAI's scale and product requirements evolve, Habitat is becoming a full-stack, one-size-fits-most database platform with end-to-end ownership of:
  • Provisioning and developer experience
  • APIs and guardrails
  • Scaling, performance, and reliability
  • Data movement, caching, routing, and placement
  • Privacy enforcement and access control
  • Change Data Capture (CDC) as a first-class primitive
  • The foundation for future storage backends

You'll work on the core online database platform behind OpenAI's products, building and operating Habitat services that handle high-QPS, latency-sensitive workloads across regions. You'll partner closely with internal platform and product teams to ship safe, reliable systems, then push them to be faster and more cost-efficient through better caching, routing, observability, and operational tooling. This is a critical role for engineers who like owning hard distributed-systems problems end to end and sweating the details from p99 latency to production operations at massive scale.
In this role, you will
  • Design and build core abstractions spanning storage, caching, routing, CDC, and privacy enforcement
  • Own a major surface area end to end, from product and API design to operational excellence
  • Improve latency, correctness, and cost efficiency for real production workloads at massive scale
  • Build strong instrumentation, debugging workflows, and developer-first tooling
  • Collaborate closely with internal product and infrastructure teams to understand requirements and ship pragmatic solutions
  • Participate in an on-call rotation and raise the bar on reliability while aggressively improving performance and usability

You might thrive in this role if you have
  • A strong track record building and operating high-scale backend or data-intensive distributed systems in production
  • Excellent systems judgment and the ability to make tradeoffs across latency, cost, correctness, and reliability
  • Deep care for developer experience: simple abstractions, strong defaults, guardrails, and debuggability
  • Comfort owning ambiguous problems end to end and driving roadmap plus execution
  • Experience in one or more of: databases, caching systems, routing and load balancing, indexing and retrieval, CDC pipelines
  • Deep experience with tail latency and global performance optimization (p95, p99, request steering, locality)
  • Experience designing platform APIs consumed by many internal teams
  • Experience with multi-region systems, consistency semantics, and failover design

Qualifications
  • 8+ years of industry experience building production software, including 3+ years leading large-scale, complex projects or technical initiatives as a tech lead or senior IC
  • Strong passion for building distributed systems at scale, with a focus on reliability, scalability, security, and continuous improvement
  • Proficiency in Rust and/or Python (Rust preferred for core systems work; Python commonly used for tooling, services, and ecosystem integration)
  • Excellent communication skills, with the ability to build alignment and drive decisions across diverse technical and non-technical stakeholders.

About OpenAI
OpenAI is an AI research and deployment company dedicated to ensuring that general-purpose artificial intelligence benefits all of humanity. We push the boundaries of the capabilities of AI systems and seek to safely deploy them to the world through our products. AI is an extremely powerful tool that must be created with safety and human needs at its core, and to achieve our mission, we must encompass and value the many different perspectives, voices, and experiences that form the full spectrum of humanity.
We are an equal opportunity employer, and we do not discriminate on the basis of race, religion, color, national origin, sex, sexual orientation, age, veteran status, disability, genetic information, or other applicable legally protected characteristic.
For additional information, please see OpenAI's Affirmative Action and Equal Employment Opportunity Policy Statement.
Background checks for applicants will be administered in accordance with applicable law, and qualified applicants with arrest or conviction records will be considered for employment consistent with those laws, including the San Francisco Fair Chance Ordinance, the Los Angeles County Fair Chance Ordinance for Employers, and the California Fair Chance Act, for US-based candidates. For unincorporated Los Angeles County workers: we reasonably believe that criminal history may have a direct, adverse and negative relationship with the following job duties, potentially resulting in the withdrawal of a conditional offer of employment: protect computer hardware entrusted to you from theft, loss or damage; return all computer hardware in your possession (including the data contained therein) upon termination of employment or end of assignment; and maintain the confidentiality of proprietary, confidential, and non-public information. In addition, job duties require access to secure and protected information technology systems and related data security obligations.
To notify OpenAI that you believe this job posting is non-compliant, please submit a report through this form. No response will be provided to inquiries unrelated to job posting compliance.
We are committed to providing reasonable accommodations to applicants with disabilities, and requests can be made via this link.
OpenAI Global Applicant Privacy Policy
At OpenAI, we believe artificial intelligence has the potential to help people solve immense global challenges, and we want the upside of AI to be widely shared. Join us in shaping the future of technology.

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