• Develop and maintain RESTful APIs using Python (FastAPI) • Work with data processing using Pandas and NumPy • Implement Machine Learning solutions using scikit-learn • Design and optimize databases (PostgreSQL or Azure SQL Database) • Build cloud applications using Azure services • Create modern, responsive interfaces with React.js and TypeScript • Manage application state with Redux or Context API • Contribute to building CI/CD pipelines in Azure DevOps • Integrate systems and automate workflows with Azure Functions and Logic Apps • Collaborate with multidisciplinary teams (data, product, design)

POSITION OVERVIEW: Opiniion is seeking a backend software engineer with strong SQL and Node.js skills. We are migrating from MongoDB to PostgreSQL across a complex Node.js application. We need someone who can own this — not just run scripts, but design the schema, execute a safe migration, and guide us to write better application code on the other side. We also need someone who has experience writing fast, secure, and clean APIs and application code in Node.js. The absolute floor for experience is 5 years. RESPONSIBILITIES: - Write and maintain Node.js API services - Architect the relational schema from our existing document-based data model - Design and execute a zero-downtime migration strategy (dual-write, expand-contract, etc.) - Own DB performance — indexing, query analysis, connection pooling - Work with Node.js to read, process, and optimize MongoDB and SQL - Work inside Docker locally and on AWS QUALIFICATIONS: - Have shipped a production NoSQL → relational migration, and can walk us through it - Have a strong background in backend software engineering, and understand relevant computer science fundamentals - Know PostgreSQL deeply (JSONB, CTEs, window functions, transactions, EXPLAIN ANALYZE) - Are competent and autonomous at writing Node.js code - Have used schema migration tooling - Are comfortable in AWS (RDS, ECS, IAM, VPC basics) - Think about data integrity first, speed second - Are willing to use AI in your daily development work You’re NOT the right person if: - Haven’t worked in Node.js before - Can’t write raw SQL — we’re not hiding behind abstractions here - Can’t explain database migrations and other core concepts - Need hand-holding on Docker, AWS, or advanced SQL - Are opposed to using AI in your daily development work TECHNICAL SKILLS: - Proficiency in Node.js — building APIs and service-layer code - Deep PostgreSQL knowledge - Experience with MongoDB and NoSQL-to-relational migration patterns - Docker for local development environments - AWS fundamentals: RDS, ECS, IAM, VPC OUR TECHNOLOGY STACK: - Vue.js, Node.js, AWS, Docker, and MongoDB (Soon changing to PostgreSQL) - GitHub, CircleCI OPINIION’S CULTURE: At Opiniion, we take our work seriously, but we don’t take ourselves too seriously! Our culture has been affectionately coined "Funfessional"—a perfect blend of professionalism and fun. We are committed to maintaining the highest standards of integrity, ethics, and excellence in all we do while fostering an environment where people enjoy coming to work. We believe in collaboration, innovation, and building a team that truly cares—about our clients, their residents, and each other. BENEFITS SNAPSHOT: - Comprehensive healthcare plans, encompassing medical, dental, and vision insurance, along with group life coverage. Opiniion covers 40-90% of the premium cost for employees and all dependents. - 401(k) retirement plan with a 100% corporate match on the first 1% and 50% match on the next 5%. - Pre-tax Health Spending Accounts (HSA). - Paid Parental Leave for all new parents (including adoption or foster care). - Unlimited Time Off policies. - 10 Paid Holidays annually. - Monthly Gym Reimbursement benefit. *Note that the above benefits are available only to full-time employees of Opiniion* Opiniion is an equal opportunity employer that is committed to diversity and inclusion in the workplace. We prohibit discrimination and harassment of any kind based on actual or perceived race, color, creed, religion, national origin, ancestry, citizenship status, age, sex or gender (including pregnancy, childbirth and pregnancy-related conditions), gender identity or expression (including transgender status), sexual orientation, marital status, military service and veteran status, physical or mental disability, genetic information, or any other characteristic protected by applicable federal, state or local laws and ordinances.

• Develop, evolve and support backend applications based on a microservices architecture, with a focus on high performance, scalability and software engineering best practices. • Develop and maintain backend applications in Java 11+. • Build and evolve microservices using Spring Boot 3.x. • Design and implement REST APIs following an API First approach (OpenAPI/Swagger). • Implement synchronous and asynchronous integrations (Feign Clients, JMS, etc.). • Model and implement business rules using JPA (Hibernate and Spring Data). • Ensure code quality with automated tests and code reviews. • Participate in agile ceremonies (daily stand-ups, planning, refinement). • Analyze issues, identify root causes and drive continuous improvements. • Collaborate with architecture, QA, infrastructure and business teams. • Support technical documentation of solutions and integrations.

BASIC FUNCTIONS: This position provides assistance and input to management, develops and leads large multifunctional development activities, solves complex technical problems, writes complex code for computer systems, and serves as a senior source of expertise. The position may also provide sizing or budget recommendations to management. QUALIFICATIONS: • 10+ years of Software Engineering experience • BS Engineering/Computer Science or equivalent experience required; advanced degree preferred TECHNICAL SKILLS: • Software development process expert in applicable methodologies (e.g., Agile, Waterfall). • Expertise in data modeling, design and manipulation, optimization, best practices, tuning, and leading industry trend knowledge. • Expertise in normalized/dimensional data modeling principles and their application to complex business needs. • Expertise in industry technology language development trends. • Expertise in test-driven development and maintenance including techniques for applying best practices for overall project benefit. • Expert knowledge of multiple data storage subsystems. • Strong budgeting/finance skills. • Proven expertise in the use and development of applicable desktop tool sets. • Proven expert in partnering and leading internal and external technology resources in solving complex business needs. • Strong interpersonal skills. • Strong experience with various resource models such as Managed Services and/or Staff Augmentation. • Strong knowledge in industry best practices in external resource development. • Solid knowledge of architectural principles. • Ability to partner and lead internal and external technology resources in solving complex business needs. • Strong proficiency with data manipulation language including optimization techniques. • Ability to design and work with complex data models. • Expertise in development languages including but not limited to: Java/J2EE, JavaScript, JSP, C/C++, HTML, XML, SQL, Windows, UNIX, and .Net. • Knowledge in using and developing applicable tool sets. • Strong organization/project planning, time management, and change management skills across multiple functional groups and departments, and strong delegation skills involving prioritizing and reprioritizing projects and managing projects of various size and complexity. • Advanced problem-solving experience involving leading teams in identifying, researching, and coordinating the resources necessary to effectively troubleshoot/diagnose complex project issues; prior success extracting/translating findings into alternatives/solutions; and identifying risks/impacts and schedule adjustments to facilitate management decision-making. • Advance communication (verbal and written) and customer service skills. Strong interpersonal, communication, and presentation skills applicable to a wide audience including senior and executive management, customers, etc., including diction/terminology and presenting information in a concise and effective manner to clients, management, and various departments using assorted communication mediums. ACCOUNTABILITIES: • Serve as a primary technical point of contact for external technology resources. • Provide design input across a product. • Work directly with customers and end users. • Serve as acknowledged “go to” person on coding and technical issues. • Interface with other technical personnel or team members to finalize requirements. • Write and review portions of detailed specifications for the development of system components of moderate complexity. • Complete complex bug fixes. • Design and work with complex data models. • Mentor lead software developers interested in consultancy on development methodologies and optimization techniques. • All other duties as assigned. U.S. National Base Pay Range: $115,400 - $192,300. Geographic differentials may apply in some locations to better reflect local market rates. If performed in Colorado, the base pay range is $115,400 - $192,300. This job is eligible for an annual incentive bonus. Application deadline is 04/30/2026. 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