Senior Software Engineer

TechChain Talent; New York (NY); On-site; USD 150,000 - 210,000; Full time

Job summary

Circle, a global blockchain fintech, is seeking a Senior Software Engineer to extend its in‑house systems infrastructure for tokenization. You will build and own scalable microservices and secure APIs for cross‑protocol value transfer, collaborating with Product and Engineering to design, test, and document system principles and quality standards.

You will focus on creating reliable APIs, integrating with banking and fintech platforms, and delivering production‑quality software with strong test

Qualifications

• 6+ years of professional software development experience in object‑oriented languages, with deep Java expertise preferred; Go is used but secondary.
• Bachelor’s Degree in Computer Science or a closely related field.
• Led teams (2–4) technically on architecture and system design.
• Experience working with payment systems such as credit cards and bank transfers.
• A broad understanding of RESTful API design and development principles.
• Experience with cloud services (AWS, Google Cloud, Microsoft Azure, etc.).
• Experience with SQL databases and schema design.
• Proven experience in design and deployment of production‑quality, scalable software.
• Focus on coding standards, code quality, and strong test coverage for CD.

Responsibilities

• Extend Circle's in‑house blockchain systems infrastructure to support tokenization.
• Build and own scalable microservices providing APIs for transferring value and assets across protocols.
• Collaborate with Product and Engineering to design, test, and document system procedures and quality standards.
• Troubleshoot issues to restore normal functioning and deliver great payment experiences.

Skills

Java

RESTful APIs

Cloud services

SQL databases

Leadership

Object‑Oriented programming

Payments systems

Education

Bachelor's Degree in Computer Science

Job description

About the Company

Circle is a global financial technology company at the frontier of the new internet of money. Our infrastructure—including USDC, a blockchain‑based dollar—powers payments, commerce, and financial applications worldwide. We help businesses, institutions, and developers leverage breakthrough blockchain technologies to drive global economic prosperity and digital inclusion.

About the Role

The Senior Software Engineer is responsible for extending Circle's in‑house blockchain systems infrastructure to support the tokenization of the world. The role involves analyzing requirements, procedures, and problems to improve existing systems and modifying them. You will build and own scalable microservices that provide reliable and secure APIs for transferring value and assets across all blockchain protocols as well as traditional banking protocols. The position requires collaboration with Product and Engineering teams to design, test, and shape Circle features, including developing and documenting system design procedures, testing procedures, and quality standards. You will troubleshoot program and system malfunctions to restore normal functioning, build publicly accessible APIs to simplify developer integration with complex payment systems, integrate Platform Services with leading banks and financial technologies, consult with management to ensure agreement on system principles, and write the infrastructure to deliver great payment experiences—including data sources (SQL or NoSQL), messaging systems, and APIs.

Requirements

• 6+ years of professional software development experience in object‑oriented languages, with deep Java expertise preferred; Go is used but secondary. C#/.NET backgrounds are not a fit.
• Bachelor’s Degree in Computer Science or a closely related field.
• Led teams (2–4) technically on architecture and system design.
• Experience working with payment systems such as credit cards and bank transfers.
• A broad understanding of RESTful API design and development principles.
• Experience with cloud services (AWS, Google Cloud, Microsoft Azure, etc.).
• Experience with SQL databases and schema design.
• Proven experience in the design and deployment of production‑quality, scalable software.
• Focus on coding standards, code quality, and a desire for strong test coverage to enable continuous delivery.