Senior Software Engineer

Xpansiv · New York City, New York

On-siteFull Time Mid Level Carbon Markets Software Engineering Software Engineer

$175,000 – $185,000/yr

Posted October 26, 2026

About the Role

Xpansiv is the leading infrastructure provider for the energy transition markets.

Our comprehensive platform includes registries, online marketplaces, market execution services, wholesale power solutions, and market data for energy and environmental commodity markets. Trusted worldwide, Xpansiv enables stakeholders to deliver transparent, credible, and auditable environmental claims to address the growing global demand for assurance and accountability on climate action and sustainability performance.

From our founding in 2009 through more than 10 acquisitions, Xpansiv has become a global leader in environmental commodity markets. We are backed by Blackstone and other leading investors.

Overview

We are seeking a highly motivated Software Engineer with a strong background in a full stack development environment using C++, TypeScript, WebSocket and REST API, and browser-based GUIs. The ideal candidate will have at least 5 years of professional experience and a passion for problem-solving and teamwork. Interest in financial markets is highly desirable.

Key Responsibilities

Design, develop, and maintain scalable web applications using TypeScript.

Develop and integrate REST APIs to support business functions.

Create and optimize browser-based GUIs for enhanced user experience.

Collaborate with cross-functional teams to define, design, and ship new features.

Troubleshoot and resolve software defects and issues.

Maintain code quality through code reviews and automated tests.

Stay updated with the latest industry trends and technologies.

Qualifications

1 to 2 years of professional experience in full stack software development.

Backend – C++, Typescript / IPC Shared Memory

Middle – Backend for Frontend – Typescript, C++ / WebSocket

Frontend – SPA / Svelte UI Focus

Expert in TypeScript and modern JavaScript frameworks.

Expert in developing browser-based GUIs.

Proficient in C++.

Experience with REST API development.

Familiarity with financial markets is a plus.

Excellent teamwork and communication skills.

Strong problem-solving skills and attention to detail.

Ability to work in an agile development environment.

What We Offer

Competitive salary and benefits package.

Opportunity to work on innovative projects.

Collaborative and supportive work environment.

Professional growth and development opportunities.

How to Apply

If you are a motivated software engineer with the required skills and experience, we would love to hear from you. Please submit your resume and a cover letter detailing your qualifications and experience.

Join us and be a part of a team that values innovation, collaboration, and excellence. Together, we can achieve great things.

What can you expect throughout the interview process:

Step 1- Take-home assessment

Step 2- Recruiter screening

Step 3- Technical Interview with the team

Step 4- Key Stakeholder + Final hiring manager interview

Base Salary

Compensation for this role will vary among specific regions due to geographic differentials in the labor market, actual pay will be determined considering factors such as relevant skills and experience, knowledge, education and training. However, compensation range for this role is expected to be as follows:

New York- $175,000-$185,000

Here at Xpansiv, we cultivate diversity, celebrate individuality, and believe unique perspectives are key to our collective success in building trust and transparency in global efforts toward net-zero future. Xpansiv is committed to equal employment opportunity regardless of race, color, religion, gender, sexual orientation, gender identity or expression, national origin, age, disability, genetic information, protected veteran status, or any status protected by applicable federal, state, or local law.

Note to Recruiters: Xpansiv does not accept unsolicited resumes or referrals from placement agencies, staffing vendors or other external parties seeking recruiting fees without a signed formal agreement.