Senior Software Engineer - Business Systems

Self Financial

$140K — $170K *
Information Technology
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • 5+ years of professional experience with Python, including async programming and REST APIs
  • Strong knowledge of data integration techniques and ensuring data consistency
  • Familiarity with HTTP and API design along with live service debugging
  • Experience with caching technologies, especially Redis, and handling caching strategies
  • Solid understanding of cloud services, preferably AWS, including serverless and containerized deployments
  • Ability to analyze logs and traces for debugging in distributed systems
  • Excellent written and verbal communication skills for team collaboration and documentation

Responsibilities

  • Design and maintain Python REST APIs for CRM and service integrations
  • Diagnose and resolve performance issues in production environments
  • Utilize async Python for efficient I/O-bound processing
  • Implement and optimize caching layers for improved service throughput
  • Develop and manage CRM integrations, focusing on data synchronization
  • Operate and deploy services in cloud environments with monitoring
  • Engage in on-call support to manage production alerts and coordinate fixes

Benefits

  • Company equity in the form of Stock Options
  • Performance-based bonuses
  • Comprehensive health, vision, and dental insurance
  • Flexible vacation policy
  • Educational assistance for continued learning
  • Complimentary gym membership
  • Casual dress code to encourage comfort
  • Team building events to foster collaboration
  • Remote work arrangements and flexible scheduling
  • Paid parental leave for family support
Full Job Description
About the Role

We're looking for a Python engineer to join our Business Systems team, which builds and operates the integration layer connecting our core platforms (CRM, payments, and internal services) to the tools our customer-facing teams rely on every day. This is a high-traffic, latency-sensitive environment - our services handle hundreds of thousands of requests a day, and performance directly impacts the people using them in real time.

What You'll Do
  • Design, build, and maintain Python services (REST APIs) that integrate our CRM platform with downstream systems like payments, account management, and internal data services
  • Diagnose and resolve performance issues in production - including blocking I/O, connection handling, caching strategy, and API latency under load
  • Use async Python (asyncio) to safely parallelize I/O-bound work without degrading service throughput
  • Implement and tune caching layers (e.g., Redis) for high-throughput endpoints
  • Build and maintain integrations with a CRM platform (e.g., Salesforce), including data queries and REST-based sync
  • Deploy and operate services in a cloud environment (AWS or similar): serverless functions, containerized services, and monitoring/alerting
  • Use observability/APM tooling to trace requests, identify bottlenecks, and validate fixes with real production data
  • Write clean, well-tested, maintainable code following solid architectural patterns (clear separation of API, business logic, and infrastructure layers)
  • Participate in a rotating on-call/production-support role: triage alerts, coordinate fixes across teams, and help prevent incidents from becoming outages
  • Collaborate closely with other engineering teams, DevOps/SRE, and product stakeholders to scope and ship integration work

What We're Looking For

Required:
  • Strong professional experience with Python, including async programming and building/maintaining REST APIs
  • Solid understanding of data integration between services - how to reliably move, sync, and reconcile data across systems (batch or event-driven), handle failures/retries, and keep data consistent when systems disagree
  • Solid understanding of HTTP and API design (pagination, timeouts, rate limiting, caching), and experience debugging performance issues in a live service
  • Experience with a key-value or caching data store (Redis experience a plus) and comfort reasoning about caching/invalidation tradeoffs
  • Experience with at least one major cloud provider (AWS preferred) - serverless functions, containerized services, or similar
  • Comfort reading logs and distributed traces to debug systems issues, not just local code
  • Strong written and verbal communication - this team documents root causes and coordinates fixes across other engineering teams

Nice to Have:
  • Experience with Twilio (Voice, Studio, Flex, or similar telephony/IVR platforms) - helpful, but we're happy to train a strong Python engineer on this
  • Experience integrating with Salesforce (SOQL, Apex, REST APIs)
  • Familiarity with an APM/observability platform (e.g., Dynatrace, Datadog, New Relic), including instrumenting services with distributed tracing (e.g., OpenTelemetry) or structured logging
  • Comfort writing SQL for debugging and data validation across systems (e.g., data warehouse queries, CRM query languages like SOQL)
  • Familiarity with API documentation tooling (OpenAPI/Swagger)
  • Experience with AWS Step Functions, container autoscaling, or infrastructure-as-code (Terraform)
  • Prior on-call/production-support experience in a fast-moving environment


Base salary range: $140,000-170,000 annually. Individual pay and level is based on factors unique to each candidate, including skill set, experience, and other job-related reasons.

Benefits and Perks:

We have the compensation and benefits you expect. But there's one thing that Self Financial can offer that many companies cannot: we can positively change the world, while making a profit. We are a team of Builders, empowering our customers to build their dreams. We have a Do the Right Thing ethos in all that we do, and we hope you value that approach, too.

Our perks include:
  • Company equity in the form of Stock Options
  • Performance-based bonuses
  • Generous employer-paid health, vision and dental insurance coverage
  • Flexible vacation policy
  • Educational assistance
  • Free gym membership
  • Casual dress code
  • Team building events and activities
  • Remote work arrangements/ flexible work schedule
  • Paid parental leave

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