We are looking for a Senior Implementation Engineer (backend focus) . You will be part of the team that will be implementing our product to multiple global large financial institutions to integrate and scale the client-facing systems that power our platform. This role owns critical backend services that handle sensitive financial data, where reliability, security, and performance are essential to our clients.
Responsibilities
Backend Engineering
Design, build, and maintain backend services that power Monstro's consumer experience
Work with client IT teams to integrate Monstro backend services with client APIs and systems
Build new APIs, integrations and data pipelines
System Architecture & Scalability
Architect systems that scale gracefully as our user base grows
Identify bottlenecks and implement caching strategies (Redis, CDN, application-level caching)
Optimize query performance and tune container-based applications
Design for resilience with failover strategies, retry logic, and graceful degradation
Infrastructure & DevOps
Containerize and orchestrate services using Docker and Kubernetes
Collaborate with platform teams on infrastructure decisions
Contribute to CI/CD pipelines and ensure smooth, reliable deployments
Understand and work across the full SDLC, from local development through production observability
Data & Integrations
Work with relational and NoSQL databases, partnering with data engineers on schema and data models
Build integrations with banking systems, payment processors, and financial data providers
Implement event-driven architectures and message queues where appropriate
Security, Quality & Team Collaboration
Build systems with security as a first-class concern, including authentication, authorization, encryption, and audit logging
Ensure systems meet fintech regulatory and compliance requirements
Guide and develop junior and mid-level engineers through code reviews, pairing sessions, and technical coaching
Partner closely with frontend engineers, product managers, and designers to deliver cohesive features
Participate in architectural discussions and incident response, contributing to a culture of continuous learning and technical excellence
What Success Looks Like
Monstro products are successfully integrated with client systems
Backend systems reliably support a growing consumer user base with minimal incidents or regressions
Sensitive financial data is handled securely, correctly, and in compliance with regulatory requirements
APIs and services are well-designed, performant, and easy for mobile and web clients to consume
Infrastructure and deployment processes enable safe, frequent releases
Junior and mid-level engineers are unblocked, supported, and improving through mentorship and collaboration
Requirements
Proven experience integrating a smaller-product SaaS into large enterprise environments (e.g., fintech startup integrating with major banks or card networks).
Direct experience with open-banking style integrations - ideally FDX (preferred); otherwise experience with UK/EU open banking, or large financial integrations.
Hands-on responsibility for building an integration layer that connects core product to client systems and APIs.
Strong communicator who leads technical conversations, coordinates with client-side engineers, and takes ownership through delivery.
Core experience
7+ years professional software engineering experience.
Strong proficiency in either Python, Go.
Hands-on production experience with Docker and Kubernetes.
Experience scaling and performance-tuning container-based applications.
Solid understanding of the full SDLC and modern development toolchains (CI/CD, monitoring, logging, deployment automation).
Familiarity with API design, microservices patterns, and distributed systems.
Strong understanding of caching patterns and strategies.
Test-driven development and test automation experience.
Familiarity with cloud platforms (AWS, GCP, or Azure).
Additional desirable experience
Prior work at a software company that delivered integrations for large enterprise clients.
Comfortable working dire
Additional Information
About Monstro
Monstro is the operating system for governed financial intelligence. We build governance and intelligence infrastructure that enables artificial intelligence to operate safely, explainably, and at institutional scale.
We exist because the level of financial guidance historically available to a small group should be accessible to many more people. By combining AI with deep institutional infrastructure, we help financial institutions deliver more personalized, responsible, and life-changing financial support to millions of individuals.
We're building mission-critical systems in a highly regulated domain, and we care deeply about doing it right. If you're motivated by meaningful problems, high standards, and shaping infrastructure that improves financial outcomes, you'll feel at home here.
Monstro · New York City