Senior Software Engineer (HYBDRID -… at Sum Theory · Location…

Job Title: Senior Software Engineer LOCATION: Dallas, TX (Hybrid) POSITION TYPE: Full time W2 or Contract OVERVIEW: Serves as a technical leader responsible for the architecture, design, and delivery of robust, scalable, and secure software solutions. The Software Engineer Senior provides guidance to development teams, drives engineering best practices, collaborates across divisions to modernize legacy systems, and supports mission-critical County services. This role plays a key part in shaping technology direction, mentoring engineers, and ensuring alignment with enterprise standards and strategic objectives. The position contributes to modernization initiatives, cloud-first strategies, and digital public service delivery while ensuring compliance with accessibility, security, and regulatory requirements. RESPONSIBILITIES AND DUTIES (Responsibilities and duties include, but are not limited to the following. Percentages reflect estimated allocation of time.) Leads the technical design and implementation of complex applications, platforms, and services. Ensures timely, high-quality delivery of features aligned with business and user needs. Supports end-to-end service delivery across development, testing, deployment, and operations. Resolves critical production issues and leads incident response and root cause analysis. Ensures systems comply with accessibility, security, and regulatory standards. Designs systems for resilience, scalability, and long-term maintainability. Coordinates release planning and deployment readiness across platforms and teams. Collaborates with QA, DevOps, and support teams to streamline service transitions. Implements secure coding practices to protect systems from vulnerabilities. Automates security scanning and threat detection within CI/CD pipelines. Establishes access control measures to protect sensitive County data. Establishes coding, documentation, and testing standards across engineering teams. Promotes DevOps practices including automation, observability, and continuous delivery. Leads backlog refinement, estimation, and sprint planning for technical deliverables. Contributes to budget estimates and resource planning for technical initiatives. Optimizes system performance, uptime, and reliability across environments. Collaborates with infrastructure and security teams to align development with operational requirements. Ensures data security, privacy, and audit readiness across all systems. Drives refactoring and modernization of legacy or monolithic applications. Collaborates with architects and product managers to define technical strategy and solution architecture. Evaluates and recommends technologies, frameworks, and tools for long-term sustainability. Ensures architectural consistency, modularity, and interoperability across systems. Leads technical planning sessions, design reviews, and proof-of-concepts. Develops technical roadmaps and blueprints aligned with enterprise IT strategy. Addresses system integration challenges and API design across legacy and modern platforms. Drives alignment with cloud-first, mobile-ready, and open-standards architectures. Documents system architecture, components, interfaces, and technical decisions. Champions software quality through code reviews, unit testing, and continuous integration. Establishes automated testing, deployment pipelines, and monitoring practices. Guides resolution of technical debt and system performance issues. Identifies gaps in processes, tools, and documentation and recommends improvements. Conducts retrospectives and leads continuous improvement initiatives. Monitors and reports system metrics and performance indicators. Promotes accessibility and usability best practices across all public-facing solutions. Ensures continuous feedback loops throughout the development lifecycle. Mentors junior and mid-level engineers through coaching, pairing, and code reviews. Supports onboarding, training, and professional development for new engineers. Promotes an inclusive team culture emphasizing collaboration, learning, and accountability. Sets clear technical expectations and supports career development planning. Leads internal knowledge-sharing sessions and communities of practice. Encourages cross-training, skill development, and continuous learning. Supports morale through recognition and constructive feedback. Encourages participation in public sector innovation and open-source initiatives. Collaborates with product owners, analysts, and business partners to define technical requirements. Presents technical plans, trade-offs, and solutions in accessible, non-technical language. Acts as a liaison between engineering teams and executive stakeholders. Participates in governance, security, and compliance review boards. Leads technical demonstrations and system walkthroughs. Supports RFP/RFQ development, vendor evaluations, and solution assessments. Ensures user needs are reflected in system design and delivery priorities. Advocates for digital equity, modern architecture, and public value. Performs other duties as assigned. (Non-essential) MINIMUM QUALIFICATIONS Education, Experience & Training Education and experience equivalent to a Bachelor’s degree in Computer Science, Software Engineering, or a job-related field. Master’s degree preferred. Seven (7+) years of experience in software development, including system design and technical leadership. Certifications (Preferred) Microsoft Certified: Azure Solutions Architect AWS Certified Solutions Architect DevOps Advanced Certification KNOWLEDGE, SKILLS & ABILITIES Ability to lead and mentor engineering teams. Knowledge of modern development architectures (microservices, event-driven design). Advanced problem-solving, debugging, and system optimization skills. Knowledge of security best practices and government IT compliance. Strong written and verbal communication skills, including technical documentation. Ability to manage multiple projects and prioritize effectively. Ability to influence technical decisions across teams. Experience in fast-paced, evolving technical environments. Knowledge of enterprise systems, scalable platforms, and Agile delivery. Experience with cloud platforms (AWS, Azure, Google Cloud). Knowledge of ITIL, SAFe, Agile, and DevOps practices. Expert-level programming and design skills in modern stacks (.NET, JavaScript/Node.js, Python, Java). Strong understanding of architecture patterns, integration, infrastructure, and DevOps. Ability to translate technical concepts into business outcomes. Proficiency in languages such as .NET, TypeScript, Java, Python, C#, JavaScript, or equivalent. Experience with SQL and NoSQL databases. Knowledge of CI/CD pipelines, containerization (Docker, Kubernetes). Strong proficiency with front-end frameworks (preferably React). Familiarity with version control systems (Git). SPECIAL REQUIREMENTS Must possess a valid Texas Driver’s License with a good driving record. Required to provide a 10-year driving history. Must remain compliant with Article II, Subdivision II of Chapter 90 of the Dallas County Code. Must pass and maintain eligibility for national fingerprint-based criminal justice systems checks (FBI CJIS, NCIC/TCIC), if applicable.