Overview of Opportunity

We are seeking a high-caliber Senior Backend Engineer with a rare blend of legacy expertise and modern systems design. You will be tasked with bridging the gap between established Java infrastructures and high-performance Golang development.

This role is not for the faint of heart. You will be responsible for deconstructing, re-architecting, and rewriting large, mission-critical codebases that power global telecommunications, ensuring they are scalable, resilient, and future-proof.

This is a remote role. 

Key Responsibilities:

• Legacy Transformation: Take ownership of large, complex Java codebases and strategically migrate towards high-performance Golang microservices.
• Protocol Development: Design and maintain low-level communication interfaces involving SS7 (MAP) and DIAMETER protocols.
• System Architecture: Build and optimize highly available resilient systems capable of handling multiple client connections.
• Database Management: Design schemas and optimize queries for both MySQL and PostgreSQL to ensure data integrity and performance. Understand existing data structures and migrate them as appropriate.
• Queue Management: Implement and manage robust job queues and asynchronous task frameworks to handle API traffic and background processing.

Technical Requirements:

• Dual-Stack Understanding: Expert-level proficiency in both Java and Golang. You should be equally comfortable navigating existing code and writing equivalent high-concurrency Go routines.\
• Telecom Domain Knowledge: A deep, fundamental understanding of Signaling System No. 7 (SS7) and DIAMETER. You should be comfortable discussing the signaling stack from the MTP layers through to the application part.
• Database Expertise: Advanced experience with MySQL and PostgreSQL, including performance tuning and distributed database patterns.
• Task Orchestration and Notifications: Deep understanding of job queues and task management (e.g., RabbitMQ, Kafka, or custom-built Go workers).
• API Capability: Comfortable with API models and specifying and writing endpoints to be used by adjacent applications.

Professional Attributes & Expectations:

• A "Re-write" Mindset: You are not intimidated by code that has undergone iterations and layers of  with minimal documentation. You have the patience and skill to deconstruct complex logic and rebuild it to a superior standard.
• High Agency: A drive to see tasks through to completion. You take pride in delivering robust, high-standard code.
• Global Mobility: This role requires the ability to travel for extended periods to coordinate with global teams or oversee on-site deployments.
• Flexibility: We offer flexible working hours to accommodate your peak productivity times, provided project milestones are met.

Why Join Us?

You will be at the heart of the infrastructure that connects the world, solving hard problems in distributed computing and telecommunications. If you prefer deep technical challenges over routine feature updates, we want to hear from you.

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#remote

Overview of Opportunity 

Two Six Technologies is seeking an Intel Analyst to join our team! You will drive analytical efforts in support of client objectives leveraging next-generation operations and analysis platforms, while also partnering with technical teams to inform development of platform analytic capabilities. The ideal candidate will have deep experience working as a data or intelligence analyst, ideally involving processing large volumes of data, leveraging technology to augment human analysis, and innovative approaches to presenting findings to enable audience understanding and acting on that data. 

Responsibilities

• Partner with product owners, field operations, and developers to deeply understand client needs, and translate these requirements into collection and analysis approaches.
• Leverage a broad range of data sources and technical capabilities to analyze issues, conduct research, summarize results, and develop recommendations.
• Generate high-quality responsive analytic products and visualizations that provide insight to difficult problems demonstrating best practices in analytical tradecraft
• Employ validated analytical techniques to generate insights from large volumes of qualitative and quantitative data in support of client requirements.
• Establish key performance indicators to measure analytical output quality and utility, and make recommendations for improvement.
• Work with program leadership and lead analysts to establish analysis frameworks and best practices, and guide adoption across the team.
• Identify opportunities to improve technical tools and capabilities in support of analytical processes.
• Mentor more junior analysts.

Minimum Qualifications:

• Minimum of 10 years of experience as an Data Analyst, Operations Planner, or Intelligence Analyst
• Familiarity with foundational analysis approaches, such as descriptive, diagnostic, predictive, prescriptive, and other techniques.
• The ability to analyze data for trends and patterns and articulate the impact.
• Experience creating written intelligence reports, visualizations, briefings, and dashboards to communicate findings to leadership and operational units.
• Experience presenting analysis to technical and non-technical audiences, providing clear recommendations and assessments.
• Ability to present data in a way that tells a story and enables executive-level audiences to make decisions
• Excellent analytical and critical thinking skills, with the ability to derive insights from incomplete data.
• Active TS/SCI clearance

.Desired Qualifications:

• Prior experience conducting analysis in a US Government context or environment
• Experience with data analysis and visualization tools such as Kibana, R, Gephi, Tableau or similar analytical or open source information tools
• Experience briefing or working directly with US Government policymakers
• Prior service in defense, national security, or intelligence community organizations

Clearance Requirements:

• Active TS/SCI Clearance

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Principal Software Engineer

Two Six Technologies is looking for an experienced Principal Software Engineer to join the Sigma product engineering team. You will be a key contributor to the evolution of this product, adding AI-powered features while using AI-assisted development techniques to maximize the speed at which we release features that are complete, resilient, and secure. It is an exciting opportunity to leverage the latest technologies to make a real-world impact.

You should be comfortable taking on complex technical problems, dealing with ambiguity, forging technical strategies, crafting novel approaches to difficult challenges, and investigating and leveraging the latest AI tools to meet those objectives. Our small, remote team will give you the opportunity for outsized impact. As a Principal-level AI Software Engineer, you will actively participate in the design, build, test, implementation, and sustainment phases of product development, focused on advancing end-user operational outcomes while maintaining security and privacy. Your primary responsibility will be to leverage AI coding tools to build, test, and maintain the applications, services, APIs, and user interfaces that comprise this highly complex, multi-tier, AI-enabled software platform.

To be considered for this role, you must have experience using AI coding tools to design, develop, test, and deploy features for a production application. The ideal candidate is both a strong, independent contributor, and a teammate; honesty, reliability, and trustworthiness are expected of everyone on the team.

About Sigma
Sigma is a sensor-agnostic, mission-critical CBRNE SaaS platform built by Two Six Technologies, serving government and commercial users in radiological/nuclear detection. Our small, high-autonomy team ships production software using an agentic development model: engineers work alongside specialized AI agents for everything from architecture design to test generation to domain research. We are migrating from Java to Go on the backend, run multiple agentic AI stacks, and operate a structured knowledge system that keeps both humans and agents aligned.
This is not a team where AI is a side project, it is how we build. Real product, real customers, real mission.

This is a fully remote position with flexibility to manage your day around collaboration with your team.

What you will Do:
• Actively participate in all phases of the software development lifecycle, regularly contributing code and reviewing code contributed by agents and the rest of the team
• Design, build, test, implement, and maintain features, capabilities, and fixes, end-to-end (frontend, backend, and DevOps) within our agent-paired workflow
• Develop full software stack features, applying UX principles to the UI, along with backend development, DB design, and AI integration
• Stay current with the latest AI-powered software engineering technologies, evaluating them for the product and leveraging them wherever appropriate
• Review and elevate AI agent output, critically evaluate code, specs, and analysis; catch what automation misses; enforce quality gates
• Be a key contributor to the Java to Go migration, including shadow-mode validation, and contract testing between legacy and new services
• Collaborate with Product Management and Customer Success to identify and address customer requirements, issues, and requests
• Advise on the feasibility of technical requirements, schedule considerations, and potential risk for proposed new development work
• Participate in building out, updating, and refining the product vision, plan, and roadmap
• Leverage industry standards and best practices to regularly assess and address technical debt, particularly in consideration of cost-savings efforts and strategies
• Collaborate with the DevOps team to implement, refine, and maintain infrastructure stability and availability, as well as continuous integration and deployment pipelines
• Feed the structured knowledge base: distill decisions, designs, and trade-offs into agent-readable markdown so agents and teammates can reason about them
• Follow TDD practices, writing tests before code as a default, not an afterthought
• Mentor and learn from an experienced product development team

What you will need (basic qualifications):
• Bachelor’s degree in Computer Science, Engineering, or a related field, plus multiple years of professional software engineering experience. In lieu of degree, comparable experience will be considered.
• Extensive experience writing production-level Go using AI-enabled tools and workflows
• Practical experience using AI coding tools (e.g., Claude Code, Copilot, Cursor, or equivalent) to design, build, and test a mission-critical application that has run in production with an active user base.
• Experience with large-scale (terabytes) database development, data modeling, mapping and testing. Must have Postgres and non-relational databases experience
• Experience developing containerized applications using Docker and Kubernetes
• Experience working with event-driven architecture
• Practical experience designing, deploying, and tuning production systems running in AWS or a similar cloud computing environment
• Experience with extracting, transforming, and loading (ETL) complex datasets
• Experience finding and using open-source libraries where appropriate
• Proficiency with automated unit, integration, and functional testing
• Strong code review and troubleshooting instincts, catching subtle bugs, security issues, and design drift in both human- and agent-written code
• Knowledge of which tools and technologies are currently best practice for a given problem, with the ability to consider solutions beyond those
• Ability to work in a fully remote team with a diverse set of skills and life experiences
• Ability to communicate ideas successfully, both verbally and in writing, with people at all levels of technical expertise, including non-technical colleagues
• Ability to creatively solve problems and to learn quickly and independently

Nice if you Have:

• Experience with migrations from legacy systems to modern architectures (particularly Java to Go)
• Experience with Java, Kafka, or Cassandra
• Experience with CBRNE, defense/IC, or sensor-integration domains
• Familiarity with protobuf/gRPC, Docker Compose, GitHub Actions CI/CD
• Experience building or managing structured knowledge bases for AI agent consumption

Clearance Requirement:
• U.S. security clearance (or eligibility) is a plus but not required

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