Senior Full Stack Integrations Developer

Senior Full Stack Developer (Integrations Focus)  Description  About Octopus HR  Octopus HR is a fractional HR consultancy that partners with high-growth startups to build exceptional teams. We specialize in talent acquisition, people operations, and HR strategy for innovative companies scaling rapidly. We’re proud to partner with Pluvo on this search.
The Opportunity  Pluvo is seeking an experienced  Senior Full Stack Developer  with a strong integrations and data-platform background to join the team at a critical stage of scale. This role is centered on building and maintaining complex enterprise integrations, scalable data pipelines, and high-performance systems that power a finance-focused SaaS product used every day by customers.
Responsibilities  Integration Architecture & Data Stack   Build and maintain integrations with accounting systems such as Quick Books, Xero, and Net Suite
Design robust data pipelines connecting CRM, HR, and financial platforms
Work with data warehousing solutions (Snowflake or similar) to manage and analyze multi-source data
Ensure data integrity, security, and reliability across all integration points
Optimize SQL queries and database performance for large-scale data operations
Design and build scalable APIs capable of handling high volumes of financial and enterprise data
Performance Optimization & Scalability   Diagnose and resolve memory issues and performance bottlenecks causing system instability
Architect backend services and APIs that support growing data volumes and user traffic
Optimize database queries and implement caching strategies to improve response times
Design systems with horizontal scalability and long-term growth in mind
Database Engineering & Security   Lead database design and optimization, ensuring data is stored, accessed, and scaled securely and efficiently
Implement secure, scalable storage solutions using Postgre

SQL or similar technologies
Champion data integrity, encryption best practices, and compliance standards
Full Stack Development   Build and maintain high-performance frontends using Next.js and Type Script
Own backend development in Node.js, creating clean, well-documented APIs
Implement and maintain CI/CD pipelines to streamline deployments and reduce manual overhead
Ship new features from concept to production with end-to-end ownership
Team Leadership & Mentorship   Coach and mentor junior developers by sharing knowledge, setting standards, and providing thoughtful code reviews
Foster a high-quality engineering culture grounded in collaboration and continuous improvement
Help establish and reinforce best practices around performance, security, and code quality
Cross-Functional Collaboration   Work closely with Leadership, Product, Design, and QA to deliver high-quality features
Participate in sprint planning and lead technical discussions that shape product outcomes
Communicate complex technical concepts clearly to non-technical stakeholders
Requirements   5+ years of full-stack development experience building and operating production systems at scale
Strong experience building third-party integrations, particularly with accounting or enterprise SaaS platforms
Experience across the full data stack, including SQL, data warehousing (Snowflake or similar), and CRM/HR/ERP integrations
Demonstrated ability to manage complex, multi-source data while maintaining data quality and integrity
Strong cloud infrastructure experience, especially with AWS (EC2, RDS, Lambda, S3, Cloud Watch)
Proven track record of performance optimization and solving scalability challenges
Deep expertise in Type Script/JavaScript and modern full-stack development
Expert-level experience with Next.js or React frameworks
Extensive experience with database design, optimization, and scaling (Postgre

SQL strongly preferred)
Strong understanding of system architecture and designing for reliability and scalability
Passion for clean code, security best practices, and modern software architecture
Proven ability to solve problems creatively and effectively
Excellent verbal and written communication skills

Experience with Git-based workflows (Git Hub preferred)
Demonstrated experience mentoring and coaching junior developers
Experience working in agile environments using tools such as Jira
Nice to Haves   Experience working with LLMs, AI/ML models, or predictive analytics systems
Experience building BI tools, data visualization platforms, or analytics products
Familiarity with AI-powered presentation or reporting tools

Experience with Java
Knowledge of the financial industry or experience working in a fintech SaaS company
Familiarity with FP&A platforms such as Causal, Pigment, or similar

Experience with Dev Ops practices and infrastructure as code
Previous experience at a high-growth, VC-backed startup

Experience with Python for data science or ML workflows
Benefits    Impact:  Your work will directly support the scalability, reliability, and data integrity of a mission-critical product
Technical Challenges:  Tackle real-world…