Cmgx

Backend Software Engineer

Remote

Contractor

#Engineering

#Financial Technology

#Capital Markets

#.NET Core

#C#

#GraphQL

#Docker

#Kubernetes

#RabbitMQ

#PostgreSQL

#Azure

#Redis

Cmgx is looking for a Backend Software Engineer

Contractor Senior Remote Engineering Financial Technology Capital Markets .NET Core C#GraphQL Docker Kubernetes RabbitMQ PostgreSQL Azure Redis English Remote work Flexible hours Paid time off Professional development

The Company

Capital Markets Gateway LLC (CMG) is a financial technology firm, uniquely focused on the equity capital markets (ECM), connecting investors and underwriters via a neutral platform. CMG delivers integrated ECM data and analytics, unrivalled transparency into deal flow, and workflow efficiencies for an otherwise fragmented and inefficient process. Providing a digital system of record for firm-wide deal activity, CMG helps clients make more timely, better-informed decisions. Launched in 2017 by a team of ECM practitioners, CMG has completed two successful fundraising rounds and is backed by a group of the world’s most prestigious financial institutions. The CMG platform is currently relied upon by nearly 150 buy-side firms representing $40 trillion in AUM and 20 global investment banks. For more information, please visit www.cmgx.io.

The Role

We’re looking for a Backend Software Engineer to join our team to help build scalable, secure, and high-performing enterprise solutions for the financial industry.

As a Backend Software Engineer, you will play a key role in designing, developing, and maintaining robust backend systems and APIs that power our core products. You’ll collaborate closely with frontend engineers, product managers, and QA teams to ensure seamless data flow, system reliability, and efficient service integration. Your contributions will include optimizing performance, enhancing system architecture, and applying best practices in software development, security, and deployment to support rapid and reliable product delivery.

Our Engineering Team

The CMG engineering team consists of domain experts who work collaboratively within a culture of cross-domain knowledge sharing. We value engineers who are passionate about modern technologies and best practices.

Our engineers are willing to challenge the status quo and are constantly seeking improvement and efficiency in our code-base and platform. CMG engineers are empowered to explore solutions and bring recommendations to the table. We are in a period of making impactful engineering decisions. As part of our process, we believe in taking the time for research and prototyping - this is critical in making the right decisions.

Given the experience of our team, we have naturally adopted best practices from local development, through code review and into production rollouts. Besides the standard pull requests, test automation, code coverage tracking, containerization, and one-click deployments we are constantly reviewing these foundational components to develop new best practices

Key Responsibilities

Design, develop, and maintain scalable backend services using .NET 9 and ASP.NET Core, and GraphQL

Collaborate with distributed teams to deliver new product features and enhancements

Write high-quality, well-tested code and contribute to automated testing frameworks using xUnit.net, Moq, and FluentAssertions

Participate in architectural discussions and contribute to technical decisions, documentation, and prototyping

Leverage technologies like Docker, Kubernetes, Redis, RabbitMQ, GraphQL, and PostgreSQL to improve system reliability and performance

Monitor, debug, and optimize applications using DataDog, Grafana, OpenTelemetry, and Microsoft Azure services

Contribute to a strong engineering culture through code reviews, knowledge sharing, and continuous improvement

Engage in agile development processes including sprint planning, daily stand-ups, and retrospectives

What We're Looking For

English level - C1 or C2

Proven experience as a Backend Engineer or similar role.

C#, ASP.NET Core: 3+ years

Software Engineering: 5+ Years

Write high-quality, well-tested code

Structured, detail-oriented thinker with awareness of broader system goals.

Quick learner, self-motivated, and comfortable working with minimal supervision or dealing with ambiguity.

Strong analytical, problem-solving, and communication skills (written and verbal).

Enjoys team collaboration, continuous learning, and building scalable solutions.

Data-driven mindset with a preference for experimentation and iterative improvement.

Fintech experience is a plus

Our Tech Stack

Latest .NET version for our backend services

Entity Framework for our ORM

MassTransit and RabbitMQ for messaging

xUnit.net + Moq + FluentAssertions for testing

Hangfire for our background processing

Federated GraphQL .NET server running in Hot Chocolate

Docker + Kubernetes for microservice orchestration

PostgreSQL for relational db

Redis Cache for distributed caching and real-time messaging

Istio for our cluster service mesh

Swashbuckle for swagger generation

Microsoft Azure services for hosting and operations, soon to be cross-cloud

DataDog, Grafana and OpenTelemetry

GitHub for our Version Control

React with TypeScript on our front-end

React Native for Mobile App Development

Our Values

We innovate with purpose

We focus on outcomes vs. output

We believe diverse and inclusive teams fuel innovation

We are humble yet candid

We do right by the customer

What We Offer

2 year+ contract

15 business days of vacation

Tech courses and conferences

Top-of-the-line MacBook

Fully remote working environment

Flexible working hours

At CMG, we accept nothing less than equity, inclusion and belonging for all. We are deeply committed to listening, learning and constantly improving for the betterment of our teams, clients and communities. CMG is proud to be an Equal Opportunity Employer.

Cmgx

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Backend Software Engineer at Cmgx