Senior Software Engineer

Lob is transforming the way businesses use direct mail and is looking for a Senior Software Engineer to contribute to their billing applications. The role involves developing billing solutions, collaborating with teams, and maintaining integrations with payment systems in a cloud environment.

Responsibilities:

• Contribute to the development of billing and payments solutions
• Collaborate with other engineers to develop solutions for business cases
• Build and maintain integrations with internal and external payment and accounting systems
• Build resilient, observable services running on AWS using SQS, Lambda, and related infrastructure; own runtime reliability and incident response for services you ship
• Partner with product, finance, and cross-functional engineering teams to translate business requirements into technical solutions
• Drive adoption of automated tests, CI/CD, and robust deployment practices
• Write clear technical design docs and user-friendly operational runbooks for both technical and non-technical stakeholders
• Coach and mentor engineers, contribute to hiring, and help raise the team’s engineering standards
• Leverage AI-assisted development tools and techniques to accelerate coding, testing, documentation, and debugging while applying best practices for responsible and secure AI use

Requirements:

• 4–8 years as a software engineer (senior-level preferred)
• Strong experience with Node.js and/or Go; familiarity with Vue.js or similar frontend frameworks
• Experience with relational DBs such as Postgres, MySQL, or SQL Server, and familiarity with NoSQL/kv stores such as Redis
• Experience with job/queueing systems (SQS, Kafka, Kinesis, or similar)
• Strong background building and operating RESTful and RPC-style APIs and integrating third-party APIs
• Familiarity with unit and automated testing frameworks and test-driven development practices
• Practical experience using AI-assisted development tools for code generation, test creation, debugging, documentation, or developer productivity, plus an understanding of risks and mitigations
• Strong problem-solving, attention to detail, and clear written and verbal communication
• Demonstrated ability to take end-to-end ownership of features and services in production
• Hands-on experience with Terraform, CloudFormation, or other IaC
• Experience with metrics, distributed tracing, and centralized logging tools
• Experience optimizing high-throughput, latency-sensitive workloads
• Eagerness to learn new technologies and solve complex problems
• Experience with debugging applications and identifying issues
• Since great engineers come from a variety of backgrounds, it doesn't particularly matter if you have a specific degree—we want to hear about your contributions in a real-world setting