Senior Back-End Engineer

Sigma Software is seeking an experienced and self-driven developer to join our dynamic and growing team. 

As teamwork is one of our core values, we’re looking for professionals who thrive in collaborative environments, foster a positive and supportive atmosphere, and bring enthusiasm and passion to their craft. 

CUSTOMER

Our Customer provides an entire layer of group chat on top of WhatsApp, in addition to numerous analytics and productivity tools. Led by seasoned founders who previously worked at WhatsApp, they are uniquely positioned to lead the category with deep WhatsApp experience and technical knowledge.  

The next phase of developing the current product includes opening up the platform’s functionality to partners, beginning with the ability to initiate and manage group chats. The APIs you will develop must be robust, observable, secure, scalable, well-documented, and high-performing. 

Tech stack includes: 

• Express and TypeScript 

• Amazon Web Services: DynamoDB, SQS, Cognito, OpenSearch, and S3 

• Tight integration with Meta and WhatsApp APIs 

• Write efficient code. Most of your work will involve creating new features and expanding the platform. We are moving quickly and require you to deliver new functionality on a rapid cadence
• Operate independently, raising issues immediately when you are blocked and solving problems on your own when you can 
• Thoughtfully design testable components, coordinating with teammates to seek review and feedback to avoid friction and rework 
• Think through the work assigned to you and prepare accurate time estimates for completion 
• Suggest improvements to the platform and your own work that we can prioritize and complete over time 

• 4-10 years of experience in JavaScript and TypeScript development on the Back-end 
• Extensive experience shipping Node.js and Express servers and supporting them in production 
• Strong familiarity with AWS, including the ability to configure its systems without creating security leaks, performance bottlenecks, or billing problems 
• Experience designing, developing, and documenting APIs that others use, with a track record of learning valuable lessons over time about pitfalls to avoid them in the future 
• Proficiency in unit, integration, and acceptance testing 
• Strong command of English, including reading, writing, and speaking. Software engineering is a team sport, and we must be able to communicate efficiently to move quickly

WOULD BE A PLUS

• Application performance monitoring and improvement 
• Security engineering 
• DevOps experience or enthusiasm 
• Experience building data pipelines and workflow platforms  
• Familiarity with LLMs and generative AI 
• Front-end development with React