Senior Software Engineer

Rappel; Town of Oakland (WI); Hybrid; USD 150,000 - 180,000; Full time

Benefits offered by this job

Employee stock option grant

Healthcare

Dental

Vision

401K

Job summary

Rappel seeks a Senior Engineer to build robust, scalable software across data pipelines, customer portals and cloud infrastructure. You will join a small team transforming an internal tool into a platform, focusing on stability and forward-looking design.

You will own architecture, mentor engineers, and collaborate with product and delivery to translate customer needs into deployed features, leveraging AI and cloud-native solutions.

Qualifications

• Bachelor's or Master's degree in computer engineering, computer science, or related field.
• 5-7 years of full-time software engineering experience.
• Strong proficiency in Python is a must.
• Proficiency with back-end technologies and runtime environments such as Python or Node.js.
• Proficiency building and deploying APIs (REST/GraphQL).
• Strong proficiency with cloud computing platforms (Azure, AWS, GCP) and container technologies (Docker).
• Proficiency with PostgreSQL.
• Experience in front-end technologies such as HTML, CSS/Tailwind, JavaScript/TypeScript and React.
• Expertise with Git and GitHub.
• Track record displaying increasing ownership over technical architecture and/or system design.
• Track record of leading technical initiatives and mentoring other engineers.
• Strong communication and teamwork skills.
• Exposure to incorporating LLMs and other agentic tools into cloud native systems to enhance analytics and data processing

Responsibilities

• Work with a small team to plan, develop and test complex business software as it evolves into a platform.
• Collaborate with Product and Delivery to turn customer needs into shipped features.
• Develop domain expertise across Rappel's stack and business context, including carbon and economic modeling principles.
• Define and maintain the long-term technical architecture, guiding scalability and reliability.
• Manage development cycles to align technical decisions with business priorities.
• Model technical excellence and foster an inclusive, collaborative team culture.
• Promote data engineering best practices to improve efficiency and leverage AI and cloud technologies.
• Recommend improvements to product design and strategy for robustness and maintainability.
• Stay updated on external cloud solutions and socialise opportunities for expanded applicability

Skills

Python

Node.js

REST API

GraphQL

Cloud platforms

Docker

PostgreSQL

React

Git / GitHub

Software architecture

Leadership / mentoring

Communication

LLMs exposure

Education

Bachelor's degree in Computer Engineering/CS

Tools

Dagster

DuckDB

Terraform

Bicep

OpenTelemetry

Application Insights

Job description

Job Purpose:

As Senior Engineer, your role is to develop and maintain robust, scalable, and secure software for all of Rappel's systems, including core data pipelines, customer portals, and cloud infrastructure. We are launching a major expansion of our platform this fall, and this role will play a pivotal role in the build. The ideal candidate is drawn to analytical software, has a real eye for detail and stability, and thinks three steps ahead to anticipate what the product will need next.

Key Responsibilities:

• Work with a small team to help plan, develop and test complex business software as it transforms from an internal-facing tool to a complex platform offering.
• Work directly with Product and Delivery to turn what customers actually need into shipped features, and keep delivery seamless as new capability lands.
• Develop domain expertise across Rappel's technical stack and business context, including familiarity with carbon and economic modeling principles.
• Help define and maintain the long-term technical architecture, guiding system scalability and reliability, managing system versioning, deployment processes and drawing down technical debt.
• Manage development cycles to ensure technical decisions align with business priorities and timelines.
• Model technical excellence and best practices while fostering an inclusive, collaborate team culture.
• Develop and encourage data engineering best practices to improve system efficiency and leverage new technologies in AI and cloud environments.
• Recommend improvements to product design and strategy, ensuring robustness, scalability, and maintainability across the stack.
• Stay abreast of external trends and new functionality released by third party/cloud solutions, identifying and socializing opportunities for expanded business applicability.

Desired Experience:

• A bachelor's or master's degree in computer engineering, computer science, or related field.
• 5-7 years of full-time software engineering experience.
• Strong proficiency in Python is a must.
• Proficiency with back-end technologies and runtime environments such as Python or Node.js.
• Proficiency building and deploying APIs (REST/GraphQL).
• Strong proficiency with cloud computing platforms (any of the big three Azure, AWS, GCP) and container technologies (Docker) including deployment and management best practices
• Proficiency with PostgreSQL.
• Experience in front-end technologies such as HTML, CSS/Tailwind, JavaScript/TypeScript and popular frameworks like React.
• Expertise with Git and GitHub.
• Track record displaying increasing ownership over technical architecture and/or system design.
• Track record of leading technical initiatives and mentoring other engineers.
• Strong communication and teamwork skills.
• Exposure to incorporating LLMs and other agentic tools into cloud native systems to enhance analytics and data processing

Nice to Have:

• Prior roles or familiarity with energy or carbon systems analytics is a plus.
• Bonus: Experience with Dagster, DuckDB
• Demonstrated UI/UX experience or data visualizations (dashboards).
• Demonstrated experience on AI projects is preferred.
• Demonstrated experience building and launching products from scratch in a startup or new venture setting is highly valued.
• Familiarity with infrastructure as code (Terraform, Bicep) and observability tooling (Application Insights, OpenTelemetry, or similar)

Location: Oakland or Pasadena, hybrid working model

Compensation and benefits:

• Competitive salary commensurate with experience and location ($150,000-$180,000)
• Employee stock option grant at early-stage, fast-growing startup
• Company-supported healthcare, dental, and vision
• 401K available