Software Engineer (Mid–Senior Level)

Molecular Surroundings; Philadelphia (Philadelphia County); Hybrid; USD 120,000 - 175,000; Full time

Benefits offered by this job

Performance bonus

Hybrid work (U.S. only)

Competitive salary

Job summary

Molecular Surroundings is seeking a mid- to senior-level Software Engineer to architect, design, and build backend systems for large-scale live event-ticketing, dynamic pricing, and marketplace integrations.

This is a high-impact role ideal for an experienced engineer who thrives on solving complex infrastructure challenges from the ground up, developing proprietary tools and intelligent automation frameworks that redefine efficiency across live-event commerce.

Qualifications

• 6+ years of professional software engineering with scalable, high-performance applications.
• Bachelor's degree in CS/CE or related; master's preferred.
• Strong backend skills in Node.js/TypeScript/Python and API design.
• Experience with third-party integrations in production (marketplaces, payments, e-commerce).
• Deep AWS experience in production with IaC (CloudFormation, Pulumi, Terraform).
• Hands-on production experience with Docker and Kubernetes.

Responsibilities

• Architect APIs and backend platforms for real-time marketplace operations.
• Lead design reviews and mentor engineers in scalable code patterns.
• Collaborate across product, BI, and infra teams to drive automation and data-driven improvements.
• Ensure security, reliability, and multi-tenant data handling across distributed services.
• Continuously improve CI/CD pipelines and testing frameworks.

Skills

Node.js

TypeScript

Python

API design

Distributed systems

Debugging

Education

Bachelor's degree in CS/CE or related

Master's degree preferred

Tools

AWS

Docker

Kubernetes

Terraform

Pulumi

CloudFormation

GitHub Actions

PostgreSQL

MongoDB

Temporal

Job description

Type: Full TimeLocation: Hybrid (U.S. Only)

Level: Mid–Senior

Compensation: $120,000 - $175,000 (Base) + Performance Bonus

About the Role

We are seeking an exceptional mid- to senior-level Software Engineer to architect, design, and build next-generation backend systems for large-scale live event-ticketing, dynamic pricing, and marketplace integrations.This is a high-impact role ideal for an experienced engineer who thrives on solving complex infrastructure challenges from the ground up, developing proprietary tools and intelligent automation frameworks that redefine efficiency across live-event commerce.You'll work closely with a senior product manager deeply experienced in the industry and lead cross-functional engineering efforts spanning data architecture, API frameworks, and distributed backend services serving tens of thousands of transactions daily.

Key Responsibilities

• Build and maintain API integrations with major ticket marketplaces, handling authentication, rate limits, webhooks, and data synchronization at scale.
• Architect and develop custom end-to-end backend platforms powering ticket-marketplace operations, pricing algorithms, and automation workflows.
• Design and deploy scalable, cloud-native systems leveraging AWS (EC2, Lambda, API Gateway, S3, CloudFormation / Pulumi / Terraform).
• Orchestrate containerized services with Docker and Kubernetes on AWS, owning deployment, scaling, and reliability.
• Lead architecture reviews, enforce clean design principles, and help mentor other engineers in scalable code patterns and performance optimization.
• Collaborate across product, BI, and infrastructure teams to translate operational bottlenecks into automation and data-driven opportunities.
• Oversee security, compliance, and reliability for multi-tenant APIs, distributed services, and marketplace data handling.
• Continuously improve CI/CD pipelines (GitHub Actions), testing frameworks, and DevOps reliability.

Minimum Qualifications

• 6+ years of professional software engineering experience with a record of shipping scalable, high-performance applications.
• Bachelor's degree in Computer Science, Computer Engineering, or related discipline (Master's preferred).
• Advanced proficiency in Node.js, TypeScript, and Python for backend systems and services.
• Proven experience building and maintaining third-party API integrations in production (e.g., marketplaces, payments, or e-commerce platforms).
• Deep, hands-on AWS experience in production (EC2, Lambda, API Gateway, S3), including infrastructure-as-code (CloudFormation, Pulumi, or Terraform).
• Hands-on production experience orchestrating services with Docker and Kubernetes.
• Strong knowledge of NoSQL and relational databases (MongoDB, PostgreSQL, etc.) including schema design and performance tuning.
• Deep understanding of RESTful API design, authentication, rate-limiting, and security best practices.
• Excellent debugging, problem-solving, and architectural design skills.

Preferred Qualifications

• Prior experience in event-ticketing, e-commerce, or real-time marketplace systems.
• Microservice and message-driven architecture experience (RabbitMQ / AMQP).
• Experience with Temporal workflows, or willingness to learn it (part of our platform runs on Temporal).
• Advanced knowledge of AWS security, monitoring, and cost optimization.
• Open-source contributions.

In a Typical Day, You Will

• Architect APIs, pipelines, and internal tools for real-time marketplace operations.
• Collaborate with product and infrastructure teams to deploy intelligent automation systems.
• Lead technical design reviews and ensure modular, maintainable codebases.
• Monitor and troubleshoot marketplace integrations, data synchronization, and the performance of high-throughput distributed systems.

Interview Process

• Candidates will be invited to:Present a portfolio or GitHub repository showcasing architectural or backend projects.
• Complete a technical case study demonstrating system design and optimization.
• Participate in a live technical interview focused on API integration, cloud architecture, and advanced coding practices.

Why Join Us

• Competitive salary + bonus
• Opportunity to shape the future of live event-ticketing automation and global marketplace intelligence.
• Work alongside elite engineers solving complex, high-volume challenges at scale.
• High autonomy in a fast-moving, data-driven environment that rewards innovation and execution.
• Premium Claude access for every engineer to build and ship faster.