Senior Software Engineer

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## **What You’ll Do:**

We are seeking a highly motivated and experienced **Senior Software Engineer** to join our fast-growing team. You will design and build large-scale, multi-tenant SaaS systems that power Nue's core revenue workflows. You'll work across a powerful stack — **Java/Spring Boot**, **Node.js/React**, **modern databases (SQL & NoSQL)**, **event streaming platforms**, and **cloud infrastructure (AWS, Snowflake)** — solving complex challenges in scalability, automation, and financial workflows.

### **Responsibilities:**

• **Design, architect, and implement** large-scale, multi-tenant SaaS applications with a **shared-nothing architecture** based on the Spring Boot framework, leveraging microservices (API gateway, service registry, service monitoring), and event-driven patterns.
• Own **end-to-end feature delivery**: scoping, design, implementation, testing, rollout, and operations.
• Define and evolve **domain models and data schemas** to ensure accuracy, auditability, and long-term maintainability.
• Build and maintain **high-throughput, low-latency** services that process large volumes of events with strong consistency and reliability guarantees.
• Design and implement **event-driven workflows** using message queues and streaming platforms (e.g., Kafka, Kinesis, RabbitMQ, SNS/SQS, Webhooks).
• Drive **technical excellence** and best engineering practices — design reviews, RFCs, continuous integration, code reviews, observability, CI/CD.
• Provide architecture and technical guidance, and mentor other engineers in **distributed systems design**, **database modeling**, and **scalability** patterns.
• Establish and maintain **SLIs/SLOs** (latency, throughput, accuracy, availability) for production services and continuously improve them.
• Collaborate closely with Product and cross-functional teams to translate business requirements into robust, fault-tolerant system designs.
• Deliver high-quality design and code using modern tools and agile methodologies including **TDD, CI, refactoring, and code reviews**.
• Stay current with relevant technologies (event streaming, data infrastructure, security, AI-assisted development) and apply them pragmatically to Nue's SaaS platform.

## **What You'll Bring:**

• **Bachelor's degree** in Computer Science, Software Engineering, or a related field (or equivalent practical experience).
• **5+ years** of professional software development experience, designing and building **large-scale, distributed backend systems**.
• 5+ years of experience with **Java** (or JVM languages) and building **microservices** on frameworks such as **Spring Boot**.
• Deep understanding of **relational databases** (e.g., PostgreSQL, MySQL) including **schema design, indexing, and performance optimization**.
• Experience with **multi-tenant and/or sharded database architectures** and strategies for scale and isolation.
• Hands-on experience with **event-driven architectures** and **streaming or messaging platforms** (e.g., Kafka, Kinesis, RabbitMQ, Pub/Sub).
• Solid understanding of **data consistency models**, **idempotency**, **exactly-once / at-least-once processing**, and **eventual consistency** patterns.
• Experience with at least one major **cloud provider** (AWS, GCP, or Azure) and building cloud-native services (containers, serverless, managed data services).
• Strong **SQL skills** and familiarity with **database performance profiling and tuning**.
• Experience with **concurrent programming and thread safety** in production applications.
• Experience with **observability** (metrics, logs, traces) and diagnosing performance and reliability issues in production.
• **Test-driven mindset**, with hands-on experience writing and maintaining automated unit, integration, and end-to-end tests; familiarity with test automation frameworks such as **Playwright** or similar tools.
• Strong portfolio or examples of past projects and code.
• Strong communication and collaboration skills, with the ability to explain complex systems to both technical and non-technical stakeholders.
• Enthusiasm for working in a **fast-paced, startup-like environment** and taking end-to-end ownership of critical systems.

## **Bonus Points (optional):**

• Experience with **finance, billing, subscriptions, payments, or revenue-lifecycle** systems in a SaaS or financial-services context.
• Experience with **Snowflake** or other modern data warehouses for reporting, analytics, and reconciliation use cases.
• Familiarity with **NoSQL or time-series databases** and when to apply them alongside relational systems.
• Experience with **enterprise-scale systems** and **high-volume transactional workloads**.
• Understanding of **compliance, security, and auditability** concerns in financial systems (e.g., PCI considerations, data retention, audit trails).
• Experience integrating with **Salesforce** or other CRM/ERP platforms.
• **Demonstrated ability to effectively use AI-assisted development tools** (e.g., **Claude Code**, **Codex**, or similar) to accelerate development, improve code quality, debug complex issues, and explore system designs.
• Strong attention to detail, ownership mindset, and comfort operating in **ambiguous, evolving product domains**.

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