Onsite | Senior Full Stack Software Engineer — $85–$105/hour
24-Mag•New York, NY
•Onsite
About The Position
We are sharing a specialised full-time consulting opportunity for senior full-stack software engineers with extensive production experience building and shipping complex applications, services, and systems across modern backend, frontend, data, and cloud environments. This role supports an advanced generative AI initiative focused on building, integrating, and stress-testing real software using frontier AI models. Selected engineers will develop production-quality applications and internal tools, integrate pre-release model APIs, diagnose model and integration failures, and deliver working software rapidly across evolving technical requirements.
Requirements
- At least 6 years of dedicated professional software engineering experience
- Significant experience building and shipping production software within sophisticated engineering environments
- End-to-end ownership of production systems or applications
- Deep production expertise in at least one of Python, Java, Rust, C#, or C++
- Demonstrated professional delivery in a second programming language or technical ecosystem
- Hands-on experience with backend services and API design
- Experience with React or another modern frontend framework
- Strong understanding of data modelling and application architecture
- Experience deploying and operating software in cloud environments
- Proven ability to learn unfamiliar codebases and deliver quickly
- Demonstrable professional progression and increasing technical responsibility
- Strong written communication and ability to explain complex engineering decisions clearly
- Reliable weekday availability for approximately 40 hours per week
- Deep production experience in at least one of Python, Java, Rust, C#, or C++, together with demonstrated delivery experience in a second technical ecosystem
Nice To Haves
- Professional expertise across multiple programming-language ecosystems
- Strong Python, Java, Rust, C#, C++, or TypeScript experience
- Experience building AI-powered applications or developer tools
- Familiarity with LLM or foundation-model APIs
- Experience developing evaluation harnesses or technical benchmarking infrastructure
- Background building internal engineering platforms or developer tooling
- Strong cloud architecture and production operations experience
- Experience with observability, telemetry, and system instrumentation
- Background working in fast-moving research or advanced technology environments
Responsibilities
- Build and ship full-stack applications, backend services, APIs, and internal engineering tools
- Develop production software using Python, Java, Rust, C#, C++, TypeScript, or related technologies
- Work across backend architecture, frontend applications, data models, and cloud environments
- Own technical implementation from initial design through deployment and operational use
- Deliver robust, maintainable code under fast-moving project requirements
- Integrate pre-release AI model APIs into working software applications
- Build supporting tool interfaces, evaluation harnesses, and application scaffolding
- Develop telemetry and instrumentation to observe model and system behaviour
- Test model capabilities within realistic end-to-end software workflows
- Identify integration constraints and technical limitations during implementation
- Diagnose model, application, and integration failure modes surfaced during development
- Investigate unexpected behaviours, implementation issues, and system-level problems
- Translate engineering observations into clear written technical feedback
- Document reproducible failures and relevant technical context
- Provide actionable findings to research and engineering stakeholders
- Prototype solutions quickly against evolving or incomplete specifications
- Onboard onto unfamiliar codebases and contribute working code with minimal ramp-up
- Deliver functional increments while requirements continue to evolve
- Collaborate with engineering leadership and other developers on architecture and implementation decisions
- Maintain strong standards for code quality, technical documentation, and system design
Benefits
- Competitive rates between $85–$105 per hour depending on experience and project scope
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What This Job Offers
Job Type
Full-time
Career Level
Senior
Education Level
Associate degree
