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886 api engineer jobs at 319 companies in Washington

1mo
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Senior API Developer
Tacoma, Washington, United States
$100k-$160k/yr OnsiteFull Time
ValidaTek
ValidaTek: The federal IT firm that governs innovation as rigorously as operations, enabling agencies to rapidly adopt AI, cloud, and modern technologies with mission confidence.
7+ YOE7+ years API development experience, strong API design and security knowledge, proficiency with Java/Python/JavaScript and frameworks, CI/CD and testing experience, DoD clearance preferred.
Java, Python, JavaScript, Spring, Flask, Node.js, OAuth 2.0, JWT
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1mo
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Sr Software Engineer - Backend API Platform
Seattle, Washington, United States
$125k-$229k/yr OnsiteFull Time
The Trade Desk
The Trade DeskNASDAQ: TTD: Global independent platform for programmatic digital advertising.
6+ YOE6+ years backend/platform engineering experience building scalable user-facing APIs; expertise in identity and access models, API design, operational excellence, and mentoring engineers.
Node.js, TypeScript, Kubernetes, AWS, OIDC, Keycloak, SPIFFE, mTLS
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1mo
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Senior Software Engineer, API/SDK
Seattle, Washington, United States
$191k-$253k/yr OnsiteFull Time
Anduril Industries
Anduril Industries: Defense technology developing AI-powered autonomous military systems.
8+ YOE8+ years software engineering with customer-facing responsibilities; strong in API design, distributed systems, cloud and container platforms, CI/CD, multiple languages (Python, Java, Go, C++); must be a U.S. Person.
Python, Java, Go, C++, CI/CD, Docker, Kubernetes, AWS, Azure, GCP, REST, gRPC, GraphQL, WebSockets, message queues
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1mo
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Staff Software Engineer, API Platform
San Francisco or Seattle
OnsiteFull Time
Stripe
Stripe: Financial infrastructure platform for online businesses and enterprises.
12+ YOE5+ Mgmt12+ years technical experience,5+ years strategic technical leadership,experience with API design and infrastructure,proficient in Java/Ruby/Python/Go,strong communication and problem-solving skills.
Java, Ruby, Python, Go, Kafka, Kubernetes
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6h
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Senior Java Developer — Enterprise API Integrations
Seattle, Washington, United States
RemoteFull Time
ABC Legal Services
ABC Legal Services: Legal-services delivering service of process, eFiling, investigations, and appearance counsel to law firms and government agencies.
7+ YOEBachelor's degree in a technical field and 7+ years of professional software development experience. Requires Java, REST APIs, Spring or Spring Boot, API security, SQL, event-driven processing, testing, and integration expertise.
Java, REST, OpenAPI, SQL, MyBatis, Drools, Codex, Claude, Spring, Spring Boot, OAuth 2.0, Apache ActiveMQ
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1mo
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TikTok Shop - Customer Solutions Engineer, Apps and API
Seattle, Washington, United States
$116k-$209k/yr OnsiteFull Time
TikTok
TikTok: Short-form mobile video and social media platform.
3+ YOEBachelor's in CS or related,3+ years in solution/solution engineering or pre-sales,proficiency with RESTful APIs,experience with e-commerce/ERP/OMS/PIM/WMS integrations,strong communication and business acumen.
RESTful API, ERP, OMS, PIM, WMS
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1mo
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Senior Software Engineer - API Platform & Client Tooling
Bellevue or Livingston or New York City or San Francisco or Sunnyvale
$153k-$204k/yr OnsiteFull Time
CoreWeave
CoreWeaveNasdaq: CRWV: Specialized cloud provider for large-scale AI and machine learning.
Production Go experience, API design and versioning, client tooling/SDK/CLI or provider work, code-generation or compiler/tooling experience preferred, cross-team collaboration and mentorship.
Go, gRPC, protocol buffers, Buf, ConnectRPC, Terraform Plugin Framework, Cobra, CWIC
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2w
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Solutions Engineer
Atlanta or Washington, D.C. or Chicago or Phoenix or Seattle or Boston or Detroit
$180k-$280k/yr FieldFull Time
Bilt Rewards
Bilt Rewards: Fintech membership and payments platform helping renters and homeowners earn rewards on housing and neighborhood spending.
5+ YOERequires 5+ years in solutions engineering or related roles, API and SFTP integration expertise, implementation ownership, strong technical and commercial communication, willingness to travel up to 100%, and a bachelor's degree or equivalent experience.
SFTP, API, Yardi, RealPage, Entrata, MRI, SQL, Python, Java, ETL
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3w
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Systems Reliability Engineer
Overland Park or Atlanta or Frisco or Bellevue
$84k-$151k/yr OnsiteFull Time
T-Mobile
T-MobileNASDAQ: TMUS: The Un-carrier providing wireless and home internet services.
2+ YOEBachelor's degree required; 2–4+ years preferred. Requires DevOps, cloud, automation, monitoring, scripting, APIs, cybersecurity, and reliability engineering experience, plus U.S. work authorization.
C, C#, Java, Perl, Python, Go, Jenkins, CloudBees, Ansible, Chef, Puppet, Docker, Kubernetes, AppDynamics, Splunk, Microsoft Graph API, REST API, Microsoft Power Apps, Microsoft Power Automate, Microsoft Entra, SailPoint, ServiceNow, Azure, Microsoft Azure DevOps Pipelines, Linux, Shell
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1mo
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Associate Solutions Engineer
Seattle, Washington, United States
$91k-$105k/yr HybridFull Time
Yoodli
Yoodli: Yoodli is an AI communication-coaching platform helping teams and professionals practice high-stakes conversations through roleplays and feedback.
2+ YOE2+ years in solutions/sales engineering or similar, 1+ years selling into SMB/Mid Market, comfortable with APIs, SSO, Python/JS, strong communication and cross-team collaboration skills.
APIs, SSO, Python, JavaScript, SQL
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3d
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Forward-Deployed Engineer
San Francisco or Seattle
$200k-$300k/yr HybridFull Time
Binti
Binti: Mission-driven software serving child welfare agencies with workflow, case management, and family-support tools.
3+ YOERequires 3+ years of professional software engineering experience, distributed systems architecture, APIs, ETL, EDW, customer collaboration, and Ruby/Ruby on Rails experience; Python, C#, or Java familiarity is valued.
Ruby, Ruby on Rails, Python, C#, Java, APIs, RESTful APIs, ETL, Enterprise Data Warehouses (EDW), Gen AI
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1mo
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Forward Deployed Engineer - AI Solutions Engineering
San Francisco or Seattle
$90k-$136k/yr HybridFull Time
Aircall
Aircall: Aircall is a private B2B SaaS providing AI-powered cloud communications software for business sales and support teams.
2+ YOE2+ years technical consulting/solutions engineering experience; strong API/webhook knowledge; hands-on with low/no-code orchestration and CRM automation; prompt engineering and project management skills.
APIs, webhooks, JSON, REST, GraphQL, Zapier, Make, n8n, Workato, HubSpot, Salesforce, MCP Servers, Looker, BigQuery, Snowflake, JavaScript, Python
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1mo
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Senior Forward Deployed Engineer
Seattle, Washington, United States
$130k-$210k/yr OnsiteFull Time
Gradial
Gradial: AI-native marketing operations software helping enterprise marketers automate campaign execution across their existing systems.
5+ YOE5+ years engineering or technical implementation experience, TypeScript and API proficiency, experience with LLMs and enterprise integrations, strong communication and customer-facing skills, willingness to travel <10%.
TypeScript, APIs, LLMs
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2mo
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AI Tooling Engineer
San Francisco or Seattle or Los Angeles or New York City or United Kingdom or Ireland or Poland or Germany or Australia or North America or Europe
$200k-$260k/yr RemoteFull Time
Whatnot
Whatnot: Live shopping marketplace connecting buyers and sellers.
4+ YOE4+ years industry experience, 1+ years applied AI/LLM product experience; strong fluency with prompt engineering, RAG, MCP, agents, evals; systems-integration experience with APIs/webhooks; strong communication and mentorship skills.
Anthropic, OpenAI, Google, APIs, webhooks, LLM, RAG, MCP, evals
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1w
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Sr. Software Engineer II, Platform/API
Chicago or California or Colorado or Florida or Georgia or Illinois or Indiana or Minnesota or Missouri or Montana or New Jersey or New York or North Carolina or Ohio or Oregon or Pennsylvania or South Carolina or Texas or Utah or Vermont or Virginia or Washington or Wisconsin or country_code
$140k-$190k/yr HybridFull Time
NinjaTrader
NinjaTrader: Privately held futures trading platform and brokerage serving retail and professional futures traders.
6+ YOE6+ years building and operating backend services; Node.js, TypeScript, SQL, Docker, Kubernetes, cloud, event-driven architecture, and workflow reliability expertise. Bachelor's or master's degree or equivalent experience.
Node.js, TypeScript, Kafka, Google Cloud Pub/Sub, SQL, Docker, Kubernetes, Google Cloud Platform, Codex, Cursor, Claude Code, Statsig
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1mo
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Forward Deployed Engineer — Strategic Solutions, Integration & Delivery
Bellevue or United States or North America
FieldFull Time
Verdigris
Verdigris: Private technology providing AI-driven electrical intelligence and energy-management software for data-center operators.
7+ YOE7+ years in solutions engineering, systems integration, or forward-deployed/field engineering; strong electrical and data/APIs fluency; experience directing contractors, mentoring engineers, and applying AI agents to delivery workflows.
APIs, AI agents, BMS, EPMS, SCADA, LTE
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2mo
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Staff Engineer
Madrid or Paris or Seattle or London or Berlin or San Francisco or New York City or Sydney or Mexico City
HybridFull Time
Aircall
Aircall: Private B2B SaaS providing AI-powered cloud communications software for business sales and support teams.
10+ YOE10+ years backend engineering experience (Node.js/TypeScript, Python, or Ruby), strong system design, security and DevOps practices, AWS experience, ability to lead cross-team projects and mentor engineers.
TypeScript, Node.js, AWS, Python, REST API, GraphQL, Ruby on Rails, React, Serverless, EKS, PostgreSQL, DynamoDB, OpenSearch, Redis
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1w
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principal engineer, AI Experiences, Enterprise Applications & Decision Platforms
Seattle, Washington, United States
$174k-$290k/yr HybridFull Time
Starbucks
StarbucksNASDAQ: SBUX: Global roaster and retailer of specialty coffee.
10+ YOE10+ years in software engineering, platform engineering, enterprise architecture, or related fields; enterprise platforms and distributed systems; cloud-native architecture, APIs, application frameworks, AI, analytics, governance, security, and technical leadership.
APIs
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2w
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Forward Depolyed Engineer - RiskOS Agents
United States or San Francisco or Seattle or New York City or Carson City
$250k-$280k/yr HybridFull Time
Socure
Socure: The leading AI-native trust infrastructure providing identity verification and risk solutions for the world.
4+ YOE4+ years in hands-on software, forward deployed, solutions, implementation, applied AI engineering, technical consulting, or similar roles; experience with APIs, integrations, production systems, and customer-facing problem solving.
Python, SQL, APIs, LLM workflows, retrieval systems, evaluation frameworks, observability
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6d
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PEI Engineer
Anacortes, Washington, United States
$95k-$206k/yr OnsiteFull Time
HF Sinclair
HF SinclairNYSE: DINO: Public energy refining and marketing fuels, lubricants, asphalt, and renewable diesel for transportation and industrial markets.
5+ YOEBachelor's degree in engineering and at least 5 years of mechanical engineering experience with refinery pressure-containing equipment design, inspection, and repair. Strong engineering software and Microsoft product skills required.
Microsoft products, engineering software, ASME PCC-2, NBIC, API 510, API 579, API, ASME, NFPA, ANSI, OSHA
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