Senior Backend Engineer

Blitzy is a Cambridge, MA based AI software development platform on a mission to revolutionize the software development life cycle by autonomously building custom software to unlock the next industrial revolution. We're transforming how enterprises build software, turning enterprise requirements into enterprise grade code with an agentic software development platform that can autonomously execute 80% of the quantum of software development work. We're backed by multiple tier 1 investors, and have proven success as founders of previous start-ups.

Who we are:

Led by two pioneering co-founders we are one of the fastest growing companies in the U.S., creating our own category of enterprise autonomous software development. We automate thousands of hours of software development for our customers, which includes strong representation within the Fortune 500.

How we work:

• We move Blitzy Fast: Time is both our company’s and our clients’ most precious asset. We move quickly and decisively to innovate internally and deliver exceptional software externally.

• Championship Mindset: We operate like a professional sports team. We win as a team by holding ourselves and each other to high standards, collaborating in-person, and remaining focused on the mission.

• Passion for Invention: We’re pushing the frontier of what’s possible, requiring constant innovation and iteration.

• We Work for the Customer: We focus on delivering outsized value to the customers we work with and expanding those relationships into deep, meaningful partnerships.

We are looking for a Senior Back End Engineer to join our team and take ownership of different parts of our stack. You will be working alongside our CTO on all aspects of the current product and future product development. You will work directly with the founding team and leverage your experiences and abilities to inform decisions from product, technology, and strategy. You will help us build the foundation of this company: its culture, its processes, and its practices. There are a ton of interesting problems to solve, so come hungry. If your colleagues describe you as curious, driven, kind, and creative you will be a culture fit.

• Write review, and ship code in production that drives meaningful customer and business outcomes.

• Leverage Generative AI tools daily to improve the quality, speed, and effectiveness of both technical and non-technical work.

• Take ownership of the software you build, ensuring it delivers value in production and remains reliable and maintainable throughout its lifecycle.

• Evaluate and drive technical decisions with a long-term perspective, balancing speed, quality, security, and scalability.

• Troubleshoot and resolve complex production challenges while serving as a trusted technical resource for the broader team.

• Learn and adapt quickly to unfamiliar technologies, codebases, and domains, applying first-principles thinking and curiosity to solve complex problems.

• Create technical champions by building demos, prototypes, examples, and technical content that help developers understand and adopt new technologies.

• Collaborate closely with engineers, designers, sales executives, and other stakeholders to deliver exceptional outcomes in an in-person environment.

• Communicate openly, share the rationale behind important decisions, and actively seek feedback to keep the team aligned and moving forward.

• Champion improvements across the enterprise software development lifecycle and advocate for better ways of building, deploying, and operating software.

• Operate independently with an optimistic mindset, a high degree of accountability, and a willingness to go the extra mile to overcome obstacles and deliver results

• 6+ years of direct experience with Python, Terraform, and cloud infrastructure (GCP required; AWS or Azure a plus)

• Advanced proficiency in Python, with strong experience building and scaling microservices and backend systems

• Hands-on experience with Python backend frameworks (e.g., Django, FastAPI, Flask); familiarity with Node.js-based frameworks (Express.js, NuxtJS) is a plus

• Strong programming fundamentals across Python and at least one additional language (JavaScript/TypeScript, Java, C++, or Go)

• Advanced knowledge of Kubernetes and Terraform

• Proficiency with API architectures including REST, gRPC, and GraphQL

• Experience with relational and NoSQL databases such as PostgreSQL, MySQL, MongoDB, or Firebase

• Familiarity with CI/CD tools such as Jenkins, CircleCI, or GitLab

• Experience with version control systems such as Git

• Solid understanding of microservices architecture and distributed system design

• Familiarity with AI platforms such as OpenAI, Anthropic, Hugging Face, Vertex AI, Amazon Bedrock, or SageMaker

• Demonstrated ability to build and scale enterprise-grade applications with 99%+ service-level availability

Blitzy is an equal opportunity employer committed to building a diverse and inclusive team. We believe different perspectives make us stronger. Base salary ranges are determined by country, role, level, experience, and skills. The range displayed on each job posting reflects Blitzy’s good faith determination of the minimum and maximum targets for new hire salaries across all locations. Individual pay is determined by related factors, including job skills, experience, and relevant education or training, which may impact a final offer. Your Talent Partner can share more about the specific salary range during the hiring process