Senior Software Engineer, Email

Ada is an AI customer service company whose mission is to make customer service extraordinary for everyone. We're driven to raise a new standard of quality customer service at scale, enabling enterprise companies to deliver experiences that people loveinstant, proactive, personalized, and effortless.

Ada is an AI transformation platform and partnercombining strategic expertise with powerful AI agent management technology to accelerate businesses' AI maturity to keep them ahead of the curve. With Ada, 83% of customer conversationsand countingare effortlessly resolved through automation, giving teams more time back, companies more resources to focus on growth, and customers more life to focus on what matters most to them.

Established in 2016, Ada is a Canadian company that has powered over 5.5 billion interactions for leading brands like Square, YETI, Canva, and Monday.com, saving millions of hours of human effort. Backed with over $250M in funding from tier-one investors including Accel, Bessemer, FirstMark, Spark, and Version One Ventures, Ada is a pioneer in the management and application of AI in customer service.

At Ada, we see growth as a reflection of each individual owner's personal growth. That's why our values are rooted in driving progress and continuous improvement. If you're ambitious and eager to grow, Ada could be the place for you.

Learn more at www.ada.cx.

As an Ada engineer, you'll have the autonomy to make a huge impact and the opportunity to work alongside talented peers who challenge and inspire you. We move fast, take ownership, and always strive to improve, both as individuals and as a team. You will partner with product managers, designers, and machine learning scientists and will be responsible for both building scalable systems and working directly with LLMs. If you're excited to solve complex problems and shape the future of AI-driven customer support, we'd love to hear from you.

We're looking for a Senior Software Engineer to help evolve the core Email platform that powers Ada's AI-driven customer support. You'll build and scale the systems responsible for email ingestion, routing, SMTP connectors, Sendgrid integrations, and seamless handoffs into customer support tools like Zendesk and Salesforce.

This role is ideal for someone who enjoys solving complex distributed systems challenges, cares deeply about reliability, and wants to shape a foundational product area used by thousands of enterprise customers.

• 6 to 8+ years of backend-leaning full-stack engineering experience in production environments.
• Strong experience with Python, Node.js, TypeScript, and service-oriented architecture.
• Experience building or scaling message-based or event-driven systems.
• Familiarity with email protocols (SMTP, IMAP, DNS records) or willingness to learn quickly.
• Strong understanding of distributed systems, reliability, and observability.
• Ability to own projects end-to-end and communicate clearly with cross-functional partners.
• Collaborative, pragmatic, and comfortable working in ambiguous problem spaces.

• Experience with Sendgrid, Zendesk, or other support platforms.
• Exposure to AI/LLM-driven products.
• Security or threat-modeling experience.

• Design, build, and maintain core Email platform components including ingestion pipelines, routing logic, and threading.
• Lead architectural work to simplify and unify multiple email implementation paths (Direct Email, Email API, SMTP, BYOD, Zendesk handoffs).
• Improve reliability, observability, and performance across all email flows.
• Investigate and resolve complex production issues involving threading, routing, and third-party integrations.
• Collaborate closely with Product, CX, Security, and AI teams to ship high-quality features.
• Mentor other engineers and elevate engineering practices across the team.

• Build in a high-impact domain used by global brands.
• Work with friendly, collaborative engineers who value quality and ownership.
• Shape the future of how companies support their customers through AI.

The above Benefits and Perks only apply to full-time, permanent employees.

Thank you for your interest in joining us at Ada. Due to the high volume of applications, we will only contact candidates whose qualifications match closely to the requirements of the position. We appreciate the time you have invested in learning more about us.