Senior Software Engineer - Integrations

Mark43 is approved to hire in Canada, the UK, and 36 U.S. states, including Alabama, Arizona, California (excluding San Francisco), Colorado, Connecticut, Washington D.C., Florida, Georgia, Iowa, Idaho, Illinois, Indiana, Kansas, Massachusetts, Maryland, Maine, Michigan, Minnesota, Missouri, North Carolina, Nebraska, New Hampshire, New Jersey, New Mexico, New York, Ohio, Oklahoma, Oregon, Pennsylvania, South Carolina, Tennessee, Texas, Utah, Virginia, Vermont, Washington, Wisconsin, and West Virginia. Before applying to a remote role, please ensure that you are able to perform the position in one of the states listed above. State locations and specifics are subject to change as our hiring requirements shift. 

Applicants must be authorized to work for any employer in the country in which the role is being hired. We are unable to sponsor or take over sponsorship of an employment visa at this time.

About Mark43
Mark43 empowers communities and their governments with technology that improves safety and quality of life. We build modern, resilient software that first responders and public safety agencies depend on in their most critical moments. 

Role Overview

We are seeking an experienced Senior Software Engineer – Integrations who will take technical ownership of building and scaling integrations between Mark43’s core platform and mission‑critical third‑party systems. You’ll lead the design, development, and implementation of robust APIs, data pipelines, and messaging layers, ensuring seamless operational data flow for emergency dispatch and response systems. This is a hybrid role requiring at least three days per week in our Manchester office to support strong team collaboration.  

What You’ll Do

• Lead full lifecycle development of integrations that connect the Mark43 platform with external systems such as 911 call centers, state databases, evidence systems, and other key services.  


• Drive architectural decisions and ensure scalable, maintainable solutions across REST APIs, message queues, and event‑driven workflows.  


• Collaborate closely with Product, Engineering, and partner technical teams to define reliable API contracts and integration patterns.  


• Mentor and guide more junior engineers on the team, elevate coding standards, and lead code reviews.


• Contribute to integration testing strategies, observability, and dashboards to monitor operational data flows.


• Champion best practices for performance, security, and error‑handling in distributed systems.


• Participate in sprint planning, roadmap discussions, and technical strategy across the integrations team.

What You’ll Need

• 4+ years of professional software engineering experience, with a strong focus on backend services, distributed systems, and system integrations.


• Proven ability designing and operating APIs, webhooks, or asynchronous messaging systems (e.g., Kafka, queues).  


• Experience with languages and technologies relevant to our stack such as Java, TypeScript/JavaScript, RESTful services, SQL/MySQL, and data pipelines.  


• A solid understanding of integration challenges, including data transformation, schema evolution, retries, and failure management.


• Experience leading technical workstreams and mentoring less senior engineers.


• Strong communication skills and the ability to work with cross‑functional partners.

Nice to Have:

• Prior experience in public safety, government software, or regulated domains.


• Familiarity with CI/CD pipelines, observability tooling, and cloud‑native practices.

Why You’ll Love Working Here

At Mark43 you’ll work on software that directly impacts how first responders protect communities. You’ll enjoy collaborating across disciplines, shaping product integrations that accelerate public safety operations, and mentoring a talented engineering team. Joining our Manchester office fosters a supportive culture rooted in shared mission and innovation. 

Location

This role is based in our Manchester, UK office and follows a hybrid work model. Team members are expected to be in the office at least three days per week to foster strong collaboration and a connected team environment.