Senior Software Engineer - Backend & Architecture Lead

Energy Jobline ZR; New Bedford (MA); On-site; USD 140,000 - 190,000; Full time

Job summary

LabXchange is seeking a Senior Software Engineer to join a small, highly collaborative team responsible for designing, building, operating, and evolving our software platform. The role spans backend systems, architecture, and production environments, with ownership of major features and technical initiatives from design through production.

You will mentor engineers, contribute to architectural decisions with the CTO, and help improve engineering standards and practices while working across AWS,

Qualifications

• 5+ years of professional software engineering experience.
• Strong experience developing backend applications, APIs, integrations, and data-driven systems.
• Strong experience with modern JavaScript and TypeScript development.
• Experience with Node.js or comparable server-side application frameworks.
• Experience with relational databases such as PostgreSQL, including data modeling, migrations, transactions, and performance considerations.
• Experience building and operating applications in AWS or a comparable cloud environment.
• Experience with Docker or other containerized application environments.
• Working knowledge of React or another modern frontend framework.
• Solid understanding of software architecture, API design, asynchronous processing, distributed-system fundamentals, and production failure modes.
• Experience with CI/CD, automated testing, Git-based source control, and modern software delivery practices.
• Experience troubleshooting production systems using logs, metrics, monitoring, and other observability tools.
• Ability to independently investigate unfamiliar systems and make sound technical decisions.
• Experience performing code reviews, mentoring engineers, or providing technical guidance.
• Strong problem-solving and communication skills.

Responsibilities

• Own major features and subsystems from design through implementation, deployment, monitoring, and ongoing support.
• Design, build, and maintain backend services, APIs, database interactions, asynchronous processes, integrations, and supporting frontend functionality.
• Propose and evaluate architectural approaches with the CTO, explain tradeoffs, and lead implementation of agreed decisions as product, customer, security, performance, and scalability requirements change.
• Contribute to the production environment, including AWS infrastructure, containerized applications, CI/CD, performance, and operational troubleshooting.
• Design for reliable operation and safe change, including observability, retries, idempotency, data migrations, recovery, and protection of sensitive information.
• Review code and technical designs, including work produced through AI-assisted development workflows.
• Mentor junior and mid-level engineers through code reviews, technical discussions, and day-to-day collaboration.
• Help establish and improve engineering practices around architecture, testing, security, code review, documentation, deployment, and development workflow.
• Identify technical debt, architectural risks, operational weaknesses, and opportunities to simplify or improve existing systems.

Skills

Backend development

APIs

Data-driven systems

JavaScript/TypeScript

Node.js

React

Software architecture

CI/CD

Mentoring

Communication

Tools

PostgreSQL

Drizzle ORM

Docker

Terraform

Express

AWS (ECS, S3, SQS)

Git

Job description

LabXchange is seeking a Senior Software Engineer to join a small, highly collaborative team responsible for designing, building, operating, and evolving our software platform. The role spans backend systems, architecture, and production environments, with ownership of major features and technical initiatives from design through production.

You will mentor engineers, contribute to architectural decisions with the CTO, and help improve engineering standards and practices while working across AWS,