Software Engineer III

Crystal Equation Corporation; California; Hybrid; USD 249,290,000 - 263,618,000; Full time

Benefits offered by this job

Medical/dental/vision/life insurance

401K

Paid time off

Parental leave

Job summary

Crystal Equation Corporation seeks a Software Engineer III for a remote role in the United States. You will design and build AI-native systems that automate workflows by reasoning over data, interfacing with enterprise systems, and keeping humans in the loop where judgment is required.

You will develop the data platform, full-stack applications, and agent/tool layers using Next.js, React, TypeScript, and modern patterns, applying AI-assisted development to ship reliable software.

Qualifications

• 5+ years of professional software engineering experience.
• Experience with TypeScript/JavaScript in React environments.
• Proven ability to design and build AI-assisted features and tool integrations.
• Strong SQL and data modeling, including ORMs or GraphQL schemas.
• Experience integrating enterprise APIs into production apps.
• Ability to work independently and communicate clearly in writing.

Responsibilities

• Design and build agentic workflows using real operational data.
• Create schemas and data layer with governance concepts.
• Develop full-stack apps with Next.js, React, and APIs.
• Extend integrations with enterprise systems of record.
• Define API contracts and data migration strategies.
• Use AI coding assistants as a daily development tool.
• Participate in oncall rotations for deployed tools.

Skills

TypeScript

JavaScript

React

Next.js

LLM features

SQL

APIs

AI coding assistants

Autonomy

Communication

SDLC

Troubleshooting

Education

Bachelor's degree in CS/SE or related field

Tools

GraphQL

APIs

ORMs

BigQuery/Snowflake

Kafka/Kinesis

Job description

Job Summary

Software Engineer III Remote Summary: The Software Engineer will build the AI-native systems that change how the organization does its work. This is not a role for wiring up business logic behind a form. The goal is to take processes that today depend on people manually moving information between systems and rebuild them as agentic workflows: software that reasons over the organization's data, takes action against its systems of record, and keeps a human in the loop where judgment is required. The engineer will design and build the data platform, the full-stack applications, and the agent and tool layers that make this possible, using AI-assisted development as a core part of how the work ships.

Responsibilities

Design and build agentic workflows that operate against real operational data, including tool and function interfaces, context and retrieval strategies, evaluation harnesses, and the guardrails and human-in-the-loop checkpoints that make autonomous action safe. Design and implement entity and object schemas in a custom ORM-style data framework, including authorization and validation rules, so that agents and applications read and write through a single governed data layer. Build full-stack web applications using Next.js (React and TypeScript), API routes, and modern frontend patterns, including interfaces for reviewing, approving, and correcting agent-initiated work. Build and extend integrations with the organization's enterprise systems of record, including custom objects, triggers, automation, mutation and validation logic, and reporting. Define API contracts, data migration strategies, and rollback and conflict-resolution patterns for systems running in parallel during transition. Use AI-assisted development tools (Claude Code, Cursor, Copilot, or equivalent) as a core part of the daily workflow for implementation, code review, and refactoring. Identify manual, high-friction business processes in partnership with operations stakeholders, then propose and ship the agentic or automated replacement and measure the time and cost it recovers. Participate in the team oncall rotation for the tools you build, triaging and resolving production issues in internal systems.

Required Skills

• Strong proficiency in TypeScript and JavaScript, and modern React frameworks (Next.js preferred).
• Demonstrated experience building LLM-backed features in production, not prototypes: tool and function calling, retrieval, prompt and context engineering, and evaluation of non-deterministic output.
• Strong SQL and relational data modeling, including experience with entity-modeling frameworks, ORMs, or GraphQL schema design.
• Experience integrating enterprise or third-party platform APIs into production applications.
• Experience using AI coding assistants as a primary daily development workflow, not as an occasional aid.
• Sound judgment about where autonomy is appropriate and where a human gate belongs, and the instinct to build observability into systems that act on their own.
• Demonstrated ability to work independently, own problems end to end, and communicate clearly in writing.
• Strong command of the full software development lifecycle, from business and systems analysis through requirements gathering and functional specification, to development, testing, and delivery.
• Strong troubleshooting instincts in production systems, with the ability to make system changes as needed to resolve issues.

Preferred Skills

• Experience with agent frameworks, orchestration, or multi-step tool-using systems.
• Experience building evaluation and regression testing for LLM systems.
• Hands-on experience with enterprise CRM or ERP platform development.
• Experience with data warehouse technologies (Hive, Spark, BigQuery, Snowflake, or equivalent).
• Experience with distributed event-streaming or message-bus systems (Kafka, Pulsar, Kinesis, or equivalent).
• Experience building internal business or operations tooling, particularly around budgets, finance workflows, or approvals.

Education / Experience

5+ years of professional software engineering experience required. Bachelor's degree in computer science, software engineering, or a related field preferred, or equivalent practical experience.

Compensation

Pay range is $87 - $92 per hour with full benefits available, including paid time off, medical/dental/vision/life insurance, 401K, parental leave, and more. Our compensation reflects the cost of labor across several US geographic markets. Pay is based on several factors including market location and may vary depending on job-related knowledge, skills, and experience.

Promises We Make

At Crystal Equation, we empower people and advance technology initiatives by building trust. We will serve to empower you along the way and provide the path for your professional journey. For more information regarding our Privacy Policy, please visit crystalequation.com/privacy.