Backend Architect

Job Description

About Fyle (now part of Sage)

Fyle is now part of Sage, a global leader in accounting and business management software. Together, we're building a global expense management platform that helps businesses track, approve, and reconcile spending with ease.

Thousands of finance teams across 39+ countries use Fyle to simplify expense management, integrate with accounting systems like Sage Intacct, and enjoy a platform known for its speed, reliability, and delightful user experience.

Our backend runs on EKS / Kubernetes on AWS, using Python (Flask), PostgreSQL, and RabbitMQ to power a distributed, event-driven system that handles millions of API requests daily.

The Role

We are seeking a Backend Software Architect with 10+ years of experience designing, scaling, and evolving large backend systems.

This is a hands-on technical leadership role, responsible for defining and driving the architectural direction of our backend services while ensuring performance, scalability, and long-term maintainability.

You'll collaborate with cross-functional teams across Fyle and Sage to design the target state architecture that balances speed of delivery with the robustness of enterprise-grade systems.

Why Join Fyle x Sage

You'll help shape the next-generation architecture of a global SaaS platform at the intersection of fintech and enterprise software.

Expect to work with humble, high-caliber engineers who value craftsmanship, ownership, and long-term thinking.

You'll operate with the autonomy of a startup and the reach of a global enterprise — helping define how thousands of businesses manage expenses worldwide..

Technical Skills & Experience

Strong and proven expertise in Python, PostgreSQL, Docker, Kubernetes, and distributed systems.

Proficiency with cloud platforms (AWS preferred) and modern architecture patterns (microservices, serverless).

Hands-on experience with API design, versioning, schema evolution, and data lifecycle management.

Strong understanding of multi-tenant SaaS systems and data isolation models.

Proven ability to diagnose and optimize performance bottlenecks at both system and database layers.

Familiarity with pub/sub systems, caching strategies, and observability tooling.

Experience with enterprise-scale systems, including high-volume transactions and integrations.

Mindset & Values

System thinker — balances technical purity with pragmatic delivery.

Collaborative leader — aligns stakeholders, engineers, and product teams.

Customer-obsessed — ensures architecture decisions enhance experience, performance, and reliability.

Continuous learner — stays current with emerging technologies, frameworks, and tools.

Growth mindset — believes in mentoring, documentation, and sharing knowledge widely.

Impact Metrics

Translate customer and product requirements into architecturally sound, measurable solutions.

Improve system performance, availability, and scalability across the platform.

Reduce architectural and technical debt through proactive design improvements.

Drive adoption of engineering standards and architectural governance across teams.

Publish technical blogs and internal architecture guides to amplify learnings.

Key Responsibilities

Key Responsibilities

Architectural Leadership

Design, evolve, and own scalable, cloud-native architectures for high-volume SaaS systems.

Define system boundaries, data models, and communication patterns across distributed services.

Lead architecture reviews, RFCs, and governance, ensuring consistency in design principles and technical standards.

Define performance, security, and reliability benchmarks — and hold teams accountable to them.

Solution Design & Innovation

Translate business and customer needs into future-proof technical solutions, using domain knowledge in expense management, finance, and accounting systems.

Explore and incorporate emerging technologies (AI, automation, event streaming, serverless) where they create measurable value.

Advocate for API-first, mobile-first design principles to support global scale and flexibility.

Cross-Functional Collaboration

Partner with Product, Design, and Platform teams to ensure technical decisions enable commercial goals.

Foster alignment with Sage's enterprise architecture and digital transformation objectives.

Work closely with SREs, data engineers, and QA teams to embed observability, resilience, and CI/CD practices across systems.

Governance & Quality

Codify architecture patterns, API conventions, and service-level standards across teams.

Establish and maintain architectural guardrails that prevent regression and promote consistency.

Drive documentation, knowledge sharing, and engineering enablement initiatives.

Mentorship & Leadership

Mentor engineers and senior developers, elevating design and technical judgment across teams.

Provide technical direction for critical projects, refactors, and cross-service initiatives.

Model ownership and accountability in delivering well-architected, maintainable systems.