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 production-ready 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. 

We're looking for a Senior Back-End Engineer to take real ownership across our stack. You'll work directly alongside our CTO on current product and future development, and partner with the founding team to shape product, technology, and strategy. You'll help build not just our software, but our culture, our processes, and our engineering practices.

There are hard, interesting problems to solve here. We want someone who finds that genuinely exciting. If your colleagues describe you as curious, driven, kind, and creative — you'll fit right in.

• You write, review, and ship production code. The company's success depends on what you build.
• You use Generative AI tools daily to improve the quality and speed of everything you deliver.
• You make long-term architectural decisions, balancing speed, quality, and safety — not just what's easiest today.
• You own the code you write end-to-end: from design through deployment to ongoing operations.
• Your team can count on you when something breaks in production.
• You communicate openly, share your reasoning, and keep the team aligned on important decisions.
• You're a first-principles thinker who digs into how things actually work, not just how to use them.
• You learn quickly from sparse documentation and unfamiliar codebases.
• You thrive with autonomy, take pride in your craft, and go the extra mile to make things work.

Our hiring process is designed to assess a generalist set of engineering capabilities, with a specialization in back-end technologies.

• AI platform experience: OpenAI, Anthropic, HuggingFace, Vertex AI, Bedrock, or SageMaker
• Enterprise scale: proven track record building systems with >99% SLAs
• Deep Python, Terraform, and GCP expertise: not just familiarity — you've used these at scale

• Competitive salary ($150K–$200K) and meaningful equity
• Paid medical, dental, and vision insurance for you and your dependents
• 4% 401K match
• Flexible vacation, sick days, and work-from-home days
• Technology budget — hardware, software, books, whatever you need
• The chance to reshape an entire industry and build technology that changes how software is created
• A beautiful office in One Kendall Square, surrounded by an energizing community of fellow startups
• Unlimited snacks, coffee, espresso, and fizzy water — fuel for your best 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 believe in being 'everyday athletes'—taking care of ourselves so we can bring our best minds to work. We promote great sleep, movement, and restorative activities for optimal mental performance. It makes for a happier and more productive team.

Blitzy is an equal opportunity employer committed to building a diverse and inclusive team. We believe different perspectives make us stronger.