Senior Software Engineer

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. We are looking for an experienced Senior Software Engineer – Universal Search to help shape the future of 3rd party search and data integration at Mark43. In this role, you’ll build and scale the systems behind our universal search platform that powers fast, accurate, and secure access to critical data across our RMS, CAD, and analytics products. You'll work on distributed systems, real-time data indexing, and modern search technologies to support life-saving decision making for our public safety users. 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. What You’ll Do If you were on our team last week, you might have: Led end-to-end system design for a new universal search experience across RMS, CAD, and other core components, collaborating with Product and cross-functional engineering teams to ensure a scalable, secure, and user-friendly solution that spans domains. Extended platform configurability and connectivity to tap new search data sources using AI-powered coding tools to accelerate development while maintaining high standards for code quality. Reviewed pull requests for enhancements to our authorization layer and index mappings in configurations, providing detailed architectural and performance-focused feedback to improve clarity, maintainability, and system resilience. Acted as release manager, coordinating deployment logistics, validating release readiness, and ensuring smooth, downtime-free updates to production through clear cross-team communication. Owned the end-to-end delivery of a feature supporting permission-aware global search filtering, aligning closely with Product, Infrastructure, and Design from technical feasibility through post-release monitoring. Mentored junior engineers, pair-programmed through complex debugging sessions, and coached teammates on prioritizing technical debt while delivering roadmap commitments. Participated in the on-call rotation, triaged and resolved a spike in failed search queries, and led a structured Root Cause Analysis (RCA) to drive follow-up improvements in system observability and alerting. What You’ll Need We’re looking for a senior backend engineer with at least 4+ years of professional experience who can take ownership, lead initiatives, and operate with autonomy in a distributed systems environment. Must-Haves: Proficiency in Java or TypeScript/JavaScript with strong backend development experience. Experience integrating and working with third-party systems to support search functionality across domains. Familiarity with event-driven architectures using Amazon SNS, Amazon SQS, or Kinesis. Strong experience with AWS services such as Lambda, API Gateway, Step Functions, S3, ECS/EKS, DynamoDB, Aurora/RDS, IAM, and CloudWatch. Prior experience using AI engines to increase development velocity and deliver results Solid understanding of indexing strategies, document schema design, and query optimization. Comfort working with CI/CD workflows and Infrastructure-as-Code (IaC) tools in a serverless-first, microservices-based architecture. Excellent written and verbal communication skills. Nice to Have: Prior experience working on multi-tenant platforms or large-scale search products. Familiarity with public safety or regulated domains. Knowledge of security best practices around data access and query auditing. People Who Thrive on Our Team Also Tend to Be: Mission-driven – You care deeply about building technology that improves lives and strengthens communities Curious and humble – You ask questions before making assumptions and actively seek feedback Team-oriented – You value cross-functional collaboration as a key to shipping great software Growth-minded – You look for ways to improve every day, even if the path isn’t always clear Calm under uncertainty – You’re comfortable navigating ambiguity and solving problems without a roadmap 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.  Our Privacy Notice describes how Mark43 uses and protects the personal information of prospective employees during the recruitment process. It informs you about our handling of the personal information you provide to us when you apply for a position in our organization and in general when you express your interest in joining our team.As a part of Mark43's security measures all employees must: Engage in appropriate use of the company's electronic information resources; Become knowledgeable about and follow relevant security policies and guidelines; Protect the resources under their control, such as passwords, computers, and data that they create, receive, or download; and Promptly report security-related incidents and violations, and responding to official reports of security incidents involving their systems or accounts.Mark43 is committed to the full inclusion of all qualified individuals. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex disability, age, sexual orientation, gender identity, national origin, veteran status, or genetic information. As part of this commitment, we will ensure that persons with disabilities are provided reasonable accommodations. If reasonable accommodation is needed, please email recruiting@Mark43.com requesting the accommodation.