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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Engineer, Full Stack - Pentest Experience - **Company:** HORIZON 3, LLC - **Location:** Chicago, IL, United States (Remote available) - **Experience:** Expert - **Salary:** $170,000.0 - $235,000.0 - **Contract:** Permanent contract - **Skills:** Clean Code Principles, Java (Programming Language), JavaScript (Programming Language), Application Programming Interfaces (APIs), Artificial Intelligence, Airflow, Amazon Web Services, Microsoft Azure, Big Data, Cloud Engineering, Code Review, Cyber Security, Computer Engineering, Customer Data Management, Extract Transform Load (ETL), Relational Databases, Graph Database, Python (Programming Language), PostgreSQL, Machine Learning, Neo4j, Performance Tuning, Prometheus, Service-Oriented Architecture, Software Engineering, TypeScript, Software Vulnerability Management, Web Applications, Web Application Frameworks, Rust (Programming Language), Datadog, Data Processing, Cloud Platform System, ReactJS, Grafana, Backend, Event Driven Architecture, Containerization, AngularJS, Information Technology, Graphql, Data Management, Front End Software Development, Xero (Accounting Software), Docker, Golang - **Published:** October 22, 2026 - **Apply:** https://www.builtincolorado.com/job/senior-engineer-full-stack-pentest-experience/11802225?handler=ApplyRedirect ## About the Role The right candidate will be comfortable moving between backend services and modern frontend application development. This role will be approximately 80% backend focused and 20% frontend focused. You should be able to scope and drive work independently, proactively identify risks and tradeoffs, and help raise the bar for the engineers around them through strong execution, code reviews, and collaborative problem solving., * Strong professional experience building and operating production software across both backend and frontend layers. * Experience developing backend services in one or more modern languages such as Go, Rust, Python, Java, TypeScript, or similar. * Experience building frontend applications with modern frameworks such as React, Angular, or similar. * Strong understanding of APIs, service-oriented architectures, data modeling, and the engineering tradeoffs involved in building scalable product systems. * Ability to independently drive substantial work from vague problem statement through delivery, while coordinating effectively with cross-functional stakeholders. * Strong written and verbal communication skills, including the ability to explain technical decisions and tradeoffs clearly. * A track record of strong engineering execution, sound technical judgment, and pragmatic problem solving under ambiguity. * Experience mentoring other engineers through code reviews, design collaboration, and technical guidance. * Product-minded thinking and a focus on building experiences that improve customer outcomes. * Comfort working across multiple workstreams and balancing competing priorities with clarity and ownership. Required Education/ Experience * Bachelor's degree in Computer Science, Computer Engineering, or a related field, or equivalent practical experience. * 6+ years of professional software engineering experience. * Experience building backend services using at least one modern language, such as Python, Go, Java, TypeScript, or similar. * Experience building frontend applications using modern frameworks such as Angular or React * Experience working with SQL base relational databases in production. * Experience building backend services on a cloud platform (AWS, GCP, or Azure), and familiarity with Docker and containerized applications. Preferred Education/ Experience You don't need all of these, but experience in some of the following will help you be successful quickly: * Experience with PostgreSQL and performance tuning for large datasets. * Experience with graph databases such as Neo4j or interest in learning them. * Experience building or consuming GraphQL backends. * Experience with ETL pipelines and data processing tools (e.g., Airflow-like frameworks, custom ETL jobs, or similar).. * Experience with observability stacks (e.g., Datadog, Prometheus, Grafana) and instrumentation of services. * Experience in cybersecurity, vulnerability management, security analytics, security data platforms, or adjacent domains Required Tech Stack Experience * Backend development in one or more of: Go, Rust, Python, Java, TypeScript, or similar. * Frontend development using modern JavaScript/TypeScript in frameworks such as React, Angular, or similar. * Designing and operating APIs, services, and asynchronous or event-driven systems. * Data modeling and persistence layers for product-grade backend systems. * Cloud-native application development and deployment patterns. * Observability, reliability, and operational best practices for production services. * Technical design documents, architectural proposals, and engineering standards that help teams build consistently and effectively., * Experience building products or platforms in vulnerability management, exposure management, security telemetry, or related cybersecurity domains * Familiarity with risk scoring, prioritization systems, or data-intensive backend workflows * Experience partnering closely with product managers to define and sequence an MVP without painting the team into a corner. * Experience helping define technical standards or practices adopted beyond your immediate team. * A track record of shaping technical direction more broadly across an organization, with influence extending beyond a single team or domain. ## Description We are hiring Senior Full Stack Engineers to join our team and help build product experiences that enable customers to understand, prioritize, and act on risk in their environments. This role is for a strong senior engineer who can own meaningful product work end-to-end across both backend and frontend systems, partnering closely with Product, Design, and peer engineers to deliver outstanding customer-facing outcomes., * Build and ship world-class product capabilities spanning backend services, APIs, and modern web application interfaces. * Own moderate-to-large projects end-to-end, including scoping, technical design, implementation, rollout, and iteration. * Help implement user-facing experiences that are clear, maintainable, performant, and aligned with product requirements and design direction. * Partner closely with Product, Design, and adjacent engineering teams to deliver cross-functional initiatives. * Proactively identify and resolve technical risks, blockers, and mis-scoped work before they become larger delivery issues. * Communicate technical topics clearly to both technical and non-technical audiences, including tradeoffs, delivery risks, and implementation choices. * Contribute to architectural and design discussions with a strong sense for maintainability, operability, and long-term team productivity. * Write high-quality code, tests, and technical documentation, and provide strong code reviews that improve the team's overall output. * Support and mentor less experienced engineers through thoughtful feedback, onboarding support, and day-to-day collaboration. * Help improve engineering quality, team execution, and the product experience through a strong sense of ownership and continuous improvement., Analyze malware, binary files, customer detection tickets, and machine learning detections to improve detection efficacy and reduce false positives. Review product detections, assess binary legitimacy, address internal detection questions, and provide insights to data science teams. The role collaborates with technical account managers, incident response teams, data scientists, and malware researchers. Required capabilities include malware analysis, reverse engineering, Python scripting, binary fundamentals, threat assessment, research methods, operating systems, and AI-assisted workflow improvement.