Principal Software Engineer - API Platform & Microservices

Downtown Boulder Partnership

Boston (MA)

On-site

USD 170,000 - 250,000

Full time

14 days+

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Job summary

Fidelity Investments is seeking a Principal Software Engineer for Core Custody - Institutional Digital to build and maintain a new API platform. You will work hands-on with engineering, architecture, and product teams to deliver a complete, reliable API offering that handles customer needs at scale.

You will design, implement, and document RESTful APIs using Java, with exposure to WebSockets and FIX APIs a plus.

Qualifications

Bachelor's degree in Computer Science or related field is required.
8+ years of software engineering experience.
Expert in designing, building, and documenting customer facing RESTful APIs.
Experience in Java development.
Experience with WebSockets and/or FIX APIs is a plus.
Experience designing large scale distributed systems.
Familiarity with AWS services architecture and solution patterns.
Exposure to infra as code, test automation, CI/CD, and containerization.
Proficient in databases and SQL.
Ability to build reliable software in unreliable environments.
Strong communication and organizational skills.

Responsibilities

Build and maintain a new API platform for Fidelity Digital Assets Services.
Collaborate across engineering, architecture, and product teams to deliver a complete API offering.
Ensure APIs are reliable, resilient, and scalable for customers.