Senior Software Engineer C# / .NET

About Re:Build Manufacturing

Re:Build Manufacturing is a growing family of industrial and engineering businesses combining enabling technologies, operational superiority, and strategic M&A to build America’s next generation industrial company. At Re:Build we deploy deep expertise in engineering, operations management, and technology to supercharge the performance of our member companies. We leverage deep professional expertise and a candid, principled operating culture to drive differentiated outcomes. Ours is a fast-paced environment where individuals can stretch and be challenged to pursue their fullest potential.

Re:Build was founded to pioneer a profitable model for the revitalization of US manufacturing. We’ve assembled a powerful set of complimentary capabilities and lines of business that enable us to pursue a wide range of end markets. Our acquired businesses are grounded in build-to-print and by-the-hour engineering and design services, and we’re leveraging their combined expertise to migrate to increasingly sophisticated program development and production, as well as the generation of our own products. Our unique set of capabilities lend themselves to highly complex systems and products, and we offer customers a range of services including product and systems design, automation, fabrication, assembly, and large volume contract manufacturing. Our customers span a wide array of industries including aerospace, defense, mobility, healthcare, pharma, biotech, clean tech, chemicals, energy, lifestyle, food production, and industrial equipment.

Who we are looking for

The Senior Software Engineer is a key technical contributor who designs, develops, and scales cloud-native software solutions that power Re:Build’s digital platforms. In line with The Re:Build Way, this role combines deep hands-on engineering with thoughtful architectural influence, emphasizing ownership, accountability, and long-term system health.

You will collaborate closely with product, design, and cross-functional engineering partners, working in a candid and respectful manner to solve real business problems. You bring a practical, outcome-driven mindset to innovation, thoughtfully integrating emerging technologies such as AI/ML where they add measurable value, and delivering high-quality software that balances speed, reliability, and maintainability.

The ideal candidate thrives in complex environments, approaches challenges with curiosity and discipline, and holds themselves and others to high engineering standards. You champion clean, efficient, and testable code, actively participate in code reviews, and contribute to team growth through mentorship and knowledge sharing. Guided by a mindset of continuous improvement, you stay current with industry trends and help shape Re:Build’s technology roadmap—ensuring our systems remain scalable, secure, and built to endure.

What you get to do!

• Lead the design and architecture of software systems, ensuring scalability, reliability, and high performance.
• Solve complex technical challenges and optimize system performance through innovative solutions.
• Mentor and guide junior engineers, providing technical leadership and direction to help them grow.
• Ability to write and maintain technical documentation.
• Collaborate with cross-functional teams, including product, QA, and operations, to drive product development and ensure successful delivery
• Adhere to Best Practices with company software

Must-Have Qualifications

Experience

• 7+ years’ experience developing professional software, with a solid understanding of cloud-based application development.

Programming & Frameworks 

• Deep expertise in C# and proficiency with modern JavaScript frameworks, especially React, for building responsive, high-performance, and user-centric web applications.

Cloud & Infrastructure

• Strong experience architecting and deploying cloud-native, serverless, and containerized applications on AWS (Lambda, ECS, DynamoDB, S3, Step Functions, API Gateway, Fargate).

AI/ML Integration

• Experienced in integrating AI/ML technologies into production software systems, leveraging frameworks like OpenAI, AWS Bedrock, and LangChain, with a strong foundation in algorithms, data structures, APIs, and intelligent automation workflows.

APIs & Integration

• Proficiency in designing and working with RESTful and GraphQL APIs.

Security & Compliance

• Awareness of authentication, authorization, encryption, and compliance best practices for cloud-hosted applications.

Foundational Knowledge

Agile Practices

• Hands-on experience participating in Agile ceremonies such as sprint planning, retrospectives, and cross-team collaboration.

Personal & Professional Attributes

• Brings enthusiasm, optimism, and a can-do attitude to every project.
• Leads by example—mentors junior developers, supports peers, and takes ownership of key technical decisions with confidence and humility.
• Analytical and inventive, able to break down complex technical challenges and design innovative, efficient solutions.
• Adaptable and resilient, skilled at navigating shifting priorities, new technologies, and evolving business needs.
• Communicates clearly and thoughtfully, fostering trust and alignment across teams.
• Highly organized, focused, and effective in fast-paced, dynamic environments.
• Exhibits strong problem-solving skills with consistent attention to detail and quality.
• A collaborative teammate who works seamlessly across engineering, management, and cross-functional partners.

Location  / Travel 

•  We are seeking candidates who currently reside in the Seattle, WA or Los Angeles, CA metropolitan areas.
•  Quarterly travel to our downtown Los Angeles office is required.

Compensation Expectations: Salary Range: $115K to $170K, depending on candidate experience. Additionally you will have an annual cash bonus and long term incentive. 

Travel Requirement:

• Quarterly travel to the Los Angeles, CA office is required for team meetings. 

The BIG payoff

We are a company who is going to make a difference in the industries and the communities in which we choose to operate.

Every employee of Re:Build will share ownership in the company and will share in the financial rewards of the success we achieve together, at all levels of the company!

We want to work with people that reflect the communities in which we operate

Re:Build Manufacturing is proud to be an Equal Employment Opportunity and Affirmative Action employer. We do not discriminate based upon race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, veteran status, marital status, parental status, cultural background, organizational level, work styles, tenure and life experiences. Or for any other reason.

Re:Build is committed to providing reasonable accommodations for qualified individuals with disabilities in our job application procedures. If you need assistance or an accommodation due to a disability, you may contact us at accommodations.ta@ReBuildmanufacturing.com or you may call us at 617.909.6275.