Senior api engineer jobs in United States

+Job summary · Mainstream financial services organization seeking Senior API Engineer to build modernize and operate high-volume APIs supporting tens of billions transactions annually. · +ResponsibilitiesDesign develop and own RESTful APIs supporting high-scale transactional fina ...

+Job Summary · Brooksource is hiring a Senior API Engineer to support a large financial services organization's API Platform team.This team builds modernizes and operates high-volume mission-critical APIs that power consumer-facing money movement and account services supporting t ...

· Senior API Engineer needed for this well-funded start-up. The company are a next-generation market data provider. · Your role will be to work with Engineers and Product teams to develop web backend and APIs for our core products. You will be maintaining existing web and data a ...

A CRM/software company for Equipment Rental businesses is seeking a Senior API Engineer will play a key role in modernizing the company's technology platform by designing and building a scalable API and service layer that bridges legacy systems with a modern web-based architectur ...

Dice is the leading career destination for tech experts at every stage of their careers. · Apx Systems is currently hiring for a API Gateway Engineer - Broadcom Layer 7 with one of our large Banking clients. · ...

Dice is the leading career destination for tech experts at every stage of their careers. Our client, Brooksource, is seeking a Senior API Engineer to support a large financial services organization s API Platform team. · Design, develop and own RESTful APIs supporting high-scale ...

We're offering a unique opportunity to join Launch Legends (and Autheo) as a part-time Equity Cofounder. Founded nearly four years ago, Launch Legends is at the forefront of bridging Web3 blockchain technology with the next evolution of Web2 integration—bringing businesses on-cha ...

We're offering a unique opportunity to join Launch Legends (and Autheo) as a part-time Equity Cofounder. · ...

· Shape the Future of Blockchain—Bringing Business On-Chain · We're offering a unique opportunity to join Launch Legends (and Autheo) as a part-time Equity Cofounder. Founded nearly four years ago, Launch Legends is at the forefront of bridging Web3 blockchain technology with th ...

Apex Systems is hiring an API Gateway Engineer - Broadcom Layer 7 with one of their large Banking clients. · Alexis joined Apex in April 2016 as a recruitment specialist and has been working on various roles including sales delivery management. · ...

We're growing fast – both in terms of volume (>$8B traded last year) and adoption as an alternative news source.Our ambition is to become a ubiquitous beacon of truth in global media. · Polymarket is looking for an experienced API engineer to develop and deploy endpoints for our ...

This is a Senior Backend Tech Lead position where you'll architect and build a centralized registry platform that stores and governs metadata about internal APIs and services. You'll own API design, ingestion pipelines, schema validation, and potentially semantic search capabilit ...

About Polymarket · Polymarket is the world's largest prediction market platform. We enable individuals to express views on real-world events by trading on outcomes across politics, economics, sports, culture, and current affairs. Built as a peer-to-peer marketplace with no centra ...

We are looking for a hands-on Azure Application Developer / Senior API Engineer with strong experience in ASP.NET Web API and modern cloud practices on Microsoft Azure. You will design, build, and maintain scalable RESTful APIs and cloud-native services, contribute to application ...

We're looking for an experienced API engineer to develop and deploy endpoints for our ISV customers. · Maintain API access to our US Exchange. · Create systems that help ISV participants and institutional customers set market prices on the US Exchange. · ...

EchoStar is reimagining the future of connectivity.Our business reach spans satellite television service, live-streaming and on-demand programming, smart home installation services, mobile plans and products. · ...

Design and develop scalable API specifications using OpenAPI/YAML with enhanced data security and collaborate with application teams to understand API requirements and needs. · Bachelors Degree in Computer Science or related field · 5+ years of experience in development, and impl ...

Posted Date · 3/03/2026 · Description · Overview of the Role: · Citi, the leading global bank, has approximately 200 million customer accounts and does business in more than 160 countries and jurisdictions. Citi provides consumers, corporations, governments, and institutions with ...

You are a leader by example and a subject matter expert in designing, building, and integrating APIs and distributed systems. · ...

We are seeking a hands-on Senior Software Engineer with deep expertise in API engineering, · integration patterns, and event-driven architecture.This engineer will execute the design for the next generation of services that sit between legacy mainframe systems · and modern distri ...