Senior Software Engineer - Business Systems

Team

Business Systems Team. Builds and operates the integration layer that connects our core platforms (CRM, payments, and internal services) to the tools our customer-facing teams use every day. It's a high-traffic, latency-sensitive environment: our services handle hundreds of thousands of requests a day, and performance directly affects people using them in real time.

Location: Austin, TX.

Work Arrangement: Austin - Hybrid or Remote

You'll own real production performance problems backed by real data, not hypothetical scaling concerns. The team recently completed an evidence-based incident investigation that traced a latency issue to specific code-level causes and shipped fixes that measurably cut error rates and response times. If you like solving concrete, high-impact problems and can back your reasoning with data, you'll fit right in.

• Design, build, and maintain Python REST services that integrate our CRM platform with payments, account management, and internal data services
• Diagnose and resolve production performance issues, including blocking I/O, connection handling, caching, and API latency under load
• Use async Python (asyncio) to parallelize I/O-bound work safely, and implement and tune caching layers (e.g., Redis)
• Build and maintain CRM integrations (e.g., Salesforce), including data queries and REST-based sync
• Deploy and operate services in AWS or a similar cloud, using APM/observability tools to trace requests and validate fixes
• Write clean, well-tested code with clear separation of API, business logic, and infrastructure layers
• Join a rotating on-call/production-support role and collaborate with engineering, DevOps/SRE, and product partners

• Strong professional Python experience, including async programming and building/maintaining REST APIs
• Solid understanding of data integration between services: moving, syncing, and reconciling data (batch or event-driven), handling failures and retries, and keeping data consistent
• Solid understanding of HTTP and API design (pagination, timeouts, rate limiting, caching) and experience debugging performance in live services
• Experience with a key-value or caching store (Redis a plus) and comfort with caching/invalidation tradeoffs
• Experience with a major cloud provider (AWS preferred): serverless, containers, or similar
• Comfort reading logs and distributed traces to debug systems issues
• Strong written and verbal communication; this team documents root causes and coordinates fixes across engineering teams

• Experience with Twilio (Voice, Studio, Flex, or similar telephony/IVR); we're happy to train a strong Python engineer
• Experience integrating with Salesforce (SOQL, Apex, REST APIs)
• Familiarity with an APM/observability platform (e.g., Dynatrace, Datadog, New Relic), including OpenTelemetry or structured logging
• Comfort writing SQL for debugging and data validation across systems
• Familiarity with 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

Self Financial is an AI-forward company. Our interview process is designed to understand your own career experience, technical acumen, and communication skills. Please do not use AI tools to generate or assist with your answers during interviews unless we explicitly invite you to. If we have reason to believe AI was used in a way that misrepresents your own abilities, we may remove you from the interview process and from consideration for future opportunities at Self.

Salary Pay Range

$140,000 – $170,000 annually. Individual pay and level are based on factors unique to each candidate, including skill set, experience, region, and other job-related reasons.

Benefits & Perks

• Generous health, dental, and vision insurance coverage
• Employer-paid benefits including life, disability, and cost-containment resources
• Hybrid work arrangement
• Flexible vacation
• Company performance-based bonuses
• Paid parental leave
• Company equity in the form of stock options
• Education reimbursement program
• Relocation bonus to move to Austin
• Gym membership options through ClassPass or monthly reimbursement
• Lunchdrop stipend
• Paid parking
• ERG and inclusion opportunities
• Casual dress code
• Team building events and activities
• Referral program

Self Financial is a venture-backed, high-growth FinTech company with a mission to increase economic inclusion and financial resilience by empowering people to build credit and build savings.

We challenge the status quo of the credit industry by giving people accessible tools to take control of their credit, with a focus on the 100 million+ Americans who have no or low credit. We're looking for people who share our passion, tackle challenges, find solutions, and make the financial space better for the communities we serve.

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