Senior Full-Stack Software Engineer

Financial institutions - banks and credit unions - have begun a seismic shift in how they operate and serve their customers.  History is being written right now. By joining Posh, you have an opportunity to help write the story. 
Since 2018, we’ve been harnessing bleeding-edge technology to empower FIs to work smarter, and serve better.  This isn’t hype - our products are powering millions of interactions every month for over a hundred unique financial institutions - and growing. 
As AI & NLP advance at an unprecedented and aggressive pace, our promise is to stay two steps ahead.  To both innovate ourselves - and embrace innovation from the collective industry - so that we bring the best solutions into production, now.  We are building AI assistants for end-user customers and internal-user employees - all within a common ecosystem that share our most coveted moats - knowledge, aka what an assistant knows, and integration, what an assistant can do. 
Many industry sectors each come with their own complexities - regulation, jargon, idiosyncrasies, etc..  Our customers want the best - and by definition, our vertical focus means that we can provide more nuanced and valuable solutions than horizontal ones that try to be everything for everyone.  We believe verticalized AI will win, and the Financial Services sector is our sole focus. 
If you’re eager to join a company that’s actively drafting the history books on the most seismic shift of FI strategy, we’d love to hear from you!

Who you are

• Experienced Engineer: 4+ years in full-stack development with a focus on backend systems; proficient in TypeScript and React
• Technical Leader: 2+ years of experience leading projects and mentoring engineers
• Architectural Expertise: Skilled in designing scalable, robust systems and anticipating implementation challenges
• Database Proficient: Experience with relational databases like PostgreSQL or MySQL; skilled in efficient SQL queries and optimizing performance.
• Passionate about delivering high-quality, user-centric solutions with a "get things done" attitude
• Comfortable navigating ambiguity and adapting to change
• Excellent communication skills and a team player who positively influences others
• Committed to writing code that is easy-to-understand, ready-for-change, and safe-from-bugs
• Hands-on experience building high-performing, scalable architectures—not just theoretical knowledge
• Continuous Learner: Eager to stay ahead of technology trends and enhance both technical and leadership skills

What you'll do

• Build new features ranging from actionable analytics dashboards, assistant content management, end-user conversational assistant interfaces
• Optimitize critical backend systems including RAG ingestion pipelines, vector store migrations,  orchestration of ML utility services
• Optimize applications for reliability and scalability, addressing complex technical challenges
• Add monitoring, alerting, and anomaly detection so that we can better respond to operational incidents
• Write code that is easy-to-understand, ready-for-change, and safe-from-bugs
• Collaborate with other engineering teams, product managers, designers, and UX researchers
• Guide engineers, fostering a culture of excellence and continuous learning
• Drive Engineering Best Practices: Establish and promote software development standards, including code reviews and testing methodologies

Tech Stack & Tools

• React.js
• Node.js, 
• TypeScript, Python
• GraphQL, REST, Websockets
• PostgreSQL, BigQuery, Elastic Search
• Docker, Kubernetes
• Shared component library 
• Proprietary NLP/ML shared utility services & models  
• Proprietary RAG ingestion pipeline and search algorithm
• Event-driven Pub/Sub 
• Google Cloud
• GitLab / CI
• Frontier LLM providers - OpenAI and Google 
• BYO IDE - paid by us
• Google Workspace / Gmail
• Twilio for voice-telephony & SMS
• JIRA / Confluence
• Slack

Posh is a hybrid workforce, with employees located across the United States & Canada, and our home base located in Boston, MA.   We’re a small and mighty team that prides ourselves in a tasteful balance between voracity and disciplined craftsmanship.   We value those who embrace ambiguity - who leverage their curiosity and passion to push the boundaries of their knowledge in order to build exceptional products.  Our tech stack is a combination of TypeScript (node.js and React) and Python, hosted in a scalable and distributed multi-cluster Kubernetes environment.  We don’t expect everyone to have prior experience in all of our tools, but we expect fundamental competency and intellectual curiosity. 
Our products are award-winning, backed by a dream team of top-tier fintech investors with over $45 million in funding to date.