Senior Platform Engineer (Integrations) (f/m/d)

At Moss, we give finance professionals the power to automate their day-to-day and make forward-thinking decisions.

Our team and culture make us unique — we’re driven by impact and growth, where every one of us strives to learn and excel. Recognised by Sifted’s Rising 100 and LinkedIn's Top Startups, we’re here to help propel your career and together, make Moss a lasting success.

Our Platform Engineering team is responsible for the cloud platform, reliability, and technical foundations of Moss. We are now looking for a Senior Platform Engineer (Integrations) to strengthen our internal automation and integration capabilities.

In this role, you will combine backend engineering depth with platform thinking to securely enable internal teams to automate workflows and orchestrate AI-powered processes. You will design and operate the systems that connect our SpringBoot microservices with internal tools and external SaaS platforms - in a scalable, secure, and production-grade way.

This is a senior, hands-on role with clear ownership and high impact across the company.

Your responsibilities

Backend & Microservices Engineering

• Extend existing Spring Boot services and APIs to enable new integration and orchestration use cases.

• Build and maintain REST APIs, webhook endpoints, and event-driven integration patterns.

• Ensure high standards in code quality, testing, observability, and long-term maintainability.

• Apply distributed systems best practices (idempotency, retries, rate limiting, failure isolation).

Platform Engineering & Cloud Operations

• Deploy and operate integration-related services in our Kubernetes-based environment.

• Ensure proper monitoring, logging, and alerting for automation and integration workloads.

• Work closely with other Platform Engineers to maintain reliability, scalability, and performance.

• Understand networking, DNS, ingress, and service-to-service communication patterns.

Security & Integration Governance

• Design secure patterns for:

• Webhooks and inbound integrations

• OAuth-based SaaS integrations

• Secret and credential management

• Service-to-service authentication and authorization

• Apply least-privilege IAM principles across workflows and APIs.

• Evaluate risks and potential abuse scenarios in automation workflows.

• Ensure integrations meet internal security and compliance standards expected in a FinTech environment.

Product Thinking & Enablement

• Enable internal teams to self-serve automation safely through reusable components and clear guardrails.

• Operate and extend internal workflow orchestration tooling (e.g., n8n or similar).

• Translate operational and business needs into pragmatic technical solutions.

• Balance speed of enablement with system integrity and long-term maintainability

About you

• 5–10 years of professional engineering experience.

• Minimum 3+ years of hands-on production experience with Java and SpringBoot (mandatory).

• Proven experience building and operating microservices in a cloud environment.

• Practical experience with Kubernetes (deployments, networking basics, resource limits).

• Experience contributing to CI/CD pipelines and infrastructure-as-code setups

• Solid understanding of authentication and authorization patterns (OAuth2, JWT, service accounts).

In addition, here are the skills and attributes we are looking for:

• Platform-Oriented Systems Thinking You understand how backend services, infrastructure, networking, and IAM interact in a distributed system.

• Security Awareness You proactively identify blast radius, privilege boundaries, and abuse vectors in integrations and workflows.

• Ownership & Reliability Mindset You design and operate systems with long-term stability and observability in mind.

• Pragmatic Enablement You focus on enabling internal teams efficiently while maintaining governance and architectural discipline.

About Moss

Moss is a SaaS scale-up founded in Berlin, with a team of 300+ people from 50+ nationalities in 5 offices across Europe. 

Our ambition is bold: to power every SMB’s spend across Europe - fully digital, AI-driven, and seamlessly integrated for complete control. To date, over 5000 businesses in Germany, Netherlands and the UK use Moss’ leading spend management product, with modules such as corporate cards, accounts payables, employee cash reimbursements and procurement.

Moss has raised a total of €180 million in funding and is backed by the most renowned tech investors including Valar Ventures, Tiger Global, Global Founders Capital, Cherry Ventures and A-Star.

Be part of a culture that thrives on impact and speed, where you can take bold moves, learn fast and accomplish more. We’re a place where you can fast track your career - here's what else to expect:

• Top-of-market compensation package, including equity. 

• Our vibrant offices are at the heart of our culture, where in-person time fuels collaboration and connection over weekly breakfasts and Friday demos.

• Additional benefits include: 20 days “work from abroad”, 600EUR/GBP Learning & Development Budget, and other local benefits.

Unless stated otherwise, benefits apply to full-time positions (interns and working students receive a tailored package).

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