Senior Software Engineer

Atrium•Jacksonville, FL

5d•Hybrid

About The Position

Atrium Innovation Research (AIR) is a venture studio where small, cross-functional teams turn early-stage ideas and applied research—often involving AI and machine learning—into validated, revenue-ready products. Atrium is seeking a Senior Software Engineer to help move AIR products from early-stage prototypes to enterprise-ready offerings. The role pairs with the existing full-stack developer to extend the speed of MVP development while taking ownership of security, scalability, reliability, and enterprise deployment practices. This is a hands-on engineering position involving daily coding and use of AI coding tools. The engineer will establish engineering standards, mentor teammates, contribute to product development, and advise on architecture and build-versus-buy decisions. The role offers startup-like autonomy alongside the resources of an established research organization, and the engineer's work will help shape which ventures are launched.

Requirements

At least 8 years of professional software engineering experience, including at least 3 years building and operating production SaaS used by business customers.
Strong full-stack skills in a modern stack, such as TypeScript/Node.js or Python on the back end and React on the front end.
Hands-on experience deploying and operating on a major cloud platform (AWS, Azure, or GCP), including containers, infrastructure-as-code such as Terraform, and CI/CD.
Strong grounding in application security, including OWASP Top 10, identity and access management, data protection, and secure SDLC practices.
Experience designing multi-tenant systems and scalable relational databases such as PostgreSQL.
Daily practical use of AI coding assistants and experience integrating LLM APIs into products.
Ability to move between rapid prototyping and disciplined production engineering, with sound judgment about which approach is appropriate.
Clear communication with non-engineers, including product leaders and clients.
Bachelor's degree in Computer Science or a related field, or equivalent practical experience.
Ability to sit for extended periods.
Ability to work in a hybrid work environment in the Jacksonville office.

Nice To Haves

Experience taking a product through SOC 2 Type II, ISO 27001, or enterprise vendor security questionnaires.
Background in HR technology, staffing, or workforce management, especially VMS, ATS, or payroll integrations.
Experience building with AI agents, retrieval-augmented generation (RAG), or MCP-based tool integrations.
Experience with data pipelines and analytics workloads.
Prior work at an early-stage startup or internal incubator.

Responsibilities

Refactor prototype code, define clean architecture, and pay down technical debt to prepare MVPs for production.
Design systems for scale, including multi-tenant data models, performance tuning, caching, queuing, and horizontal scaling.
Own application security, including authentication and authorization, secrets management, encryption, and secure handling of candidate and worker personally identifiable information.
Prepare products for enterprise security reviews and compliance frameworks such as SOC 2.
Establish and operate cloud infrastructure, infrastructure-as-code, CI/CD pipelines, environments, release management, monitoring, alerting, and incident response.
Build reliable integrations with enterprise systems, including VMS platforms such as Beeline, SAP Fieldglass, and VNDLY, as well as ATS and HRIS systems.
Build features and help take new products from concept to MVP alongside the product developer.
Use AI coding tools daily and build AI-powered features with LLM APIs.
Set engineering standards for code review, testing, documentation, and guardrails that support fast, reliable work by a small team.
Mentor teammates and advise on architecture and build-versus-buy decisions.