Senior Backend Engineer & Tech Lead – FinTech Impact

Perpay Inc.; Philadelphia (Philadelphia County); On-site; USD 160,000 - 210,000; Full time

Benefits offered by this job

Equity

Premium medical benefits

401k match

Unlimited PTO

Remote weeks around holidays

Catered lunch

Gym subsidy

Paid cell phone plan

Student loan repayment match

Relocation assistance

Employee discounts

Job summary

Perpay is seeking a senior backend engineer to design and implement scalable server-side features, write code, review PRs, mentor engineers, and help scope and design new backend capabilities.

You’ll work with Python/Django, React, Kubernetes, AWS, Docker, Postgres and Celery in a fast-paced, on-site team in center-city Philadelphia, with the option for flexible remote weeks and generous benefits.

Qualifications

• 5+ years of experience building web applications at scale in at least one modern language / framework (e.g. Python/Django, Rails, etc.)
• 2+ years of experience leading technical teams and large, complex projects
• Deep understanding of relational databases (e.g., Postgres), query optimization, indexing strategies, and schema evolution
• Experience operating production systems in a large cloud provider (e.g. AWS)
• Familiarity with containerized environments (Docker) and orchestration systems (Kubernetes)
• Experience with background job systems and message queues (e.g. Celery)
• Working knowledge of caching strategies (e.g. Redis)
• Experience with monitoring/observability tooling (e.g. Datadog, CloudWatch)
• Strong understanding of system reliability, failure modes, and operational tradeoffs
• Ability to communicate complex system behavior clearly to non-technical stakeholders
• A solutions-oriented mindset, willing to step outside your primary domain to unblock teammates and ensure successful delivery

Responsibilities

• Design and evolve RESTful APIs used by our frontend and internal systems
• Own data modeling decisions across our relational databases with an eye toward performance and maintainability
• Improve reliability, observability, and operational excellence of our backend systems (metrics, logging, tracing, alerting)
• Participate in architectural decisions around service boundaries, asynchronous workflows, and distributed system tradeoffs
• Diagnose and resolve production issues across multiple services
• Contribute to infrastructure-as-code and CI/CD improvements to increase developer velocity and system stability
• Partner with product and stakeholders to translate complex business rules into maintainable backend systems

Skills

Backend development

Distributed systems

Architectural design

Mentoring

Code reviews

Tools

AWS

Docker

Kubernetes

Celery

Redis

PostgreSQL

Datadog

CloudWatch

Job description

Perpay is seeking a senior backend engineer to design and implement scalable server-side features, write code, review PRs, mentor engineers, and help scope and design new backend capabilities.

You’ll work with Python/Django, React, Kubernetes, AWS, Docker, Postgres and Celery in a fast-paced, on-site team in center-city Philadelphia, with the option for flexible remote weeks and generous benefits.