Senior Backend Software Engineer

Who We Are

Sakari is a profitable, bootstrapped SaaS company transforming business communication through SMS marketing and automation. Founded in 2017, we’ve scaled to thousands of customers across 30+ countries, sending millions of messages monthly.

With strong product-market fit (PMF) and integrations into HubSpot, ActiveCampaign and 1,300+ platforms, we’re evolving from an integration-first model to a standalone, AI focused, native messaging product for SMBs and mid-market businesses.

What We're Looking For

We are looking for a Senior Backend Software Engineer to architect and scale backend development at Sakari. This role blends hands-on coding with technical leadership — you’ll be the driving force behind the systems that power our workflows, APIs and AI integrations.

You will work closely with product, design and frontend engineers to deliver features that allow our customers to easily automate and manage their communication campaigns. From extending our workflow tool to support new integrations, to optimizing our system to scale to billions of messages or workflow executions. You will prototype and build agentic AI solutions, use AI for sentiment analysis, chat bots and content generation.

What You’ll Own & Deliver

Systems & Architecture

• Design, build, and scale backend services that power Sakari’s Workflows, Campaigns, and Messaging APIs.
• Prototype and Build AI powered solutions
• Implement real-time processing, queuing, and delivery of high-volume SMS and multi-channel messages.
• Optimize storage and caching for speed and cost-efficiency (MongoDB, Redis).

Collaboration

• Partner with product managers and engineers to integrate AI-driven insights into messaging automation.
• Work closely with frontend teams to deliver a seamless, self-serve customer experience.

Operational Excellence

Own uptime, reliability, and monitoring for critical messaging systems.

• Guide AWS cloud infrastructure strategy (scaling, cost, and security).
• Improve CI/CD, automated testing, and release processes to support fast iteration.

Required Technical Skills

• Languages & Frameworks: Node.js, TypeScript
• Databases & Queues: MongoDB, Redis (for caching and message queues)
• APIs: RESTful API design and scaling
• Cloud Infrastructure: AWS (EC2, Lambda, S3, CloudWatch, SNS/SQS)
• Engineering Practices: CI/CD pipelines, automated testing, distributed systems, scalability, and performance optimization

Qualifications

• 5+ years of backend engineering experience, including 1+ years in a lead or senior role.
• Proven experience building scalable SaaS platforms or messaging systems.
• Strong background in distributed systems, high-volume APIs, and event-driven architectures.
• Excellent problem-solving skills and ability to weigh tradeoffs between performance, cost, and speed.
• Must be based in the United States and legally authorized to work without sponsorship.

Nice-to-Have Skills

• AI/ML Integration: Experience integrating AI features into customer-facing applications. Experience with RAG
• Experience with telecom APIs (e.g., Twilio, Bandwidth, or similar SMS providers).
• Familiarity with startup environments or SMB-focused SaaS products.

Why Join Sakari?

• Opportunity to shape the backend architecture to support future customer growth, new product features and AI integrations
• Build features that directly impact thousands of businesses automating customer communication.
• Remote-first, flexible work environment.
• Growth opportunities in a lean, product-driven team where your impact is immediate.

Benefits

• Competitive salary
• Equity
• 6% 401(k) match
• Healthcare, vision and dental insurance
• Annual company offsite (previous destinations include Las Vegas and Mexico)
• $500 home office setup credit
• Business subscription to Udemy

Sakari does not discriminate in employment on the basis of race, color, religion, sex (including pregnancy and gender identity), national origin, political affiliation, sexual orientation, marital status, disability, genetic information, age, membership in an employee organization, retaliation, parental status, military service, or other non-merit factor.