FullStack Engineer - Prospect UI Solutions

📍 Job Overview

Job Title: FullStack Engineer - Prospect UI Solutions

Company: Constructor

Location: Munich, Germany (Remote)

Job Type: Full-Time

Category: Software Engineering / GTM Operations Support

Date Posted: September 3, 2026

Experience Level: Mid-Level (2-5 years)

Remote Status: Fully Remote

🚀 Role Summary

• Develop and maintain advanced User Interface (UI) solutions to seamlessly integrate prospective customer data with Constructor's proprietary AI-driven search and discovery services.

• Collaborate closely with internal Engineering, Product, Sales, and Data Analyst stakeholders to build and scale robust demo infrastructure, directly enabling the sales team to secure high-value e-commerce clients.

• Write and optimize JavaScript code to fuel proprietary AI models, focusing on data collection and validation to ensure the quality and accuracy of results returned by Constructor's services.

• Leverage modern tooling and AI as a co-pilot to accelerate fundamental software development capabilities, build ownership-driven solutions, and streamline team processes.

📝 Enhancement Note: This role bridges traditional Software Engineering with Go-To-Market (GTM) operations support. The "Prospect UI Solutions" title and responsibilities clearly indicate a focus on enabling the sales and pre-sales process through technical solutions, data integration, and demo development. The emphasis on customer interaction, data validation, and supporting Account Executives positions this as a technically demanding role with a significant impact on business development.

📈 Primary Responsibilities

• Design, develop, and implement front-end and back-end solutions for prospect integrations, ensuring seamless data flow and UI consistency.

• Write and maintain JavaScript code for data collection pipelines that train and enhance proprietary AI models for e-commerce search and discovery.

• Collaborate with Data Analysts and Account Executives to integrate prospect data and user interfaces with Constructor's services, focusing on ETL and front-end integration for optimized product discovery demos.

• Validate prospect-provided data and rigorously test the quality and accuracy of results returned by Constructor's AI services.

• Contribute to the development, scaling, and maintenance of demo infrastructure to enhance the capabilities and efficiency of the Sales team.

• Act as a technical point of contact for prospects, assisting Account Executives by addressing technical inquiries and providing clear, empathetic explanations of Constructor's services.

• Participate actively in code reviews, pair programming, and collaborative problem-solving sessions to elevate team knowledge and code quality.

• Develop and maintain dashboards and alerts using React, Redux, Node.js, ClickHouse, and OpenSearch for monitoring and performance analysis.

• Implement and rigorously test new features for Constructor's open-source JavaScript UI libraries and REST clients.

• Drive cross-team collaboration to ensure prospect needs are prioritized, contributing to strategic success and client acquisition.

• Foster a strong team culture through active participation in team-building activities and promoting empathy, personal growth, and mutual support.

📝 Enhancement Note: The core responsibilities highlight a blend of full-stack development, data engineering (ETL, data validation), and direct GTM support. The emphasis on "fueling AI models," "sealing the deal," and "empowering a sales force" clearly defines the role's strategic importance beyond typical software development, aligning it with revenue-generating activities and operational efficiency for the sales cycle.

🎓 Skills & Qualifications

Education: While no specific degree is mandated, a strong academic background in Computer Science, Software Engineering, or a related field is implied by the experience requirements. Candidates with equivalent practical experience will be considered.

Experience: A minimum of four years of professional or relevant academic software development experience is required.

Required Skills:

• Strong foundation and professional experience with server-side and client-side programming languages.

• Proven experience in building User Interfaces (UIs) with a strong emphasis on user experience and friendly design principles.

• Proficiency in JavaScript, with a demonstrated ability to quickly learn and apply new languages and technologies.

• Experience with front-end frameworks such as React, Vue, or Angular.

• Experience with automated testing frameworks like Cypress, Jest, or React Testing Library.

• Excellent communication and interpersonal skills, with the ability to convey technical solutions clearly and empathetically.

• English language proficiency at C1 level (CEFR) or higher.

• Ability to attend regular meetings with teammates between 14:00 and 18:00 UTC.

• Willingness to work hours ideally starting between 09:00 and 12:00 UTC. Preferred Skills:

• Experience with TypeScript, Next.js, Tailwind CSS, or Storybook.

• Familiarity with Python and web scraping techniques.

• Experience with data integration, ETL processes, and data validation.

• Knowledge of databases like ClickHouse and search/analytics engines like OpenSearch.

• Experience with API integration and building REST clients.

• Familiarity with AI/ML concepts and their application in product discovery.

📝 Enhancement Note: The requirement for C1 English and specific working hour overlaps (14:00-18:00 UTC) strongly suggests the hiring team is globally distributed, likely with a core presence in North America, and this role is intended to bridge time zones effectively. The "nice to have" skills point towards a modern, robust tech stack and a desire for candidates who can contribute to a sophisticated development environment.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Demonstrated UI/UX Solutions: Showcase examples of user interfaces you've designed and built, highlighting your approach to user-centric design and intuitive navigation.

• Data Integration & ETL Projects: Include projects that demonstrate your ability to connect disparate systems, transform data (ETL), and ensure data integrity for downstream applications.

• AI/ML Integration Examples: If possible, present any projects where you've integrated or supported AI/ML models, focusing on data pipelines or front-end interfaces that consume model outputs.

• Testing & Quality Assurance: Provide evidence of your commitment to quality through examples of automated test suites (unit, integration, end-to-end) you've implemented.

Process Documentation:

• Workflow Design & Optimization: Document the design and implementation phases of a significant feature or system, detailing how you optimized workflows for efficiency and user experience.

• System Implementation & Automation: Present case studies on how you've implemented new systems or automated existing processes to improve team productivity or product performance.

• Measurement & Performance Analysis: Detail how you've used data visualization tools (like those mentioned: React, Redux, Node, Clickhouse, OpenSearch) to track performance metrics, identify bottlenecks, and drive improvements.

📝 Enhancement Note: For this role, a portfolio should clearly articulate the candidate's ability to not only build functional software but also to contribute directly to the sales enablement process. Demonstrating how their technical contributions have directly impacted deal closure or prospect satisfaction will be key. Emphasis should be placed on projects involving data pipelines, customer-facing integrations, and tools that support sales demonstrations.

💵 Compensation & Benefits

Salary Range: The base salary range for this position is between $80,000 and $120,000 USD per year. The final offer will be determined based on factors such as job-related knowledge, skills, experience, and interview performance.

Benefits:

• Unlimited Vacation Time: Encouraged to take at least 3 weeks per year.

• Fully Remote Work: Freedom to choose your living location.

• Work From Home Stipend: Resources to set up an optimal home office.

• Apple Laptops Provided: Company-issued equipment for new employees.

• Training and Development Budget: Annual budget for continuous learning and skill enhancement.

• Maternity & Paternity Leave: Support for new parents.

• Meaningful Impact: Opportunity to work with intelligent colleagues and contribute significantly.

• Team Offsites: Regular in-person events for team building and collaboration.

Working Hours: This is a full-time role, typically requiring 40 hours per week. Specific working hours are flexible but require attendance at regular meetings with teammates between 14:00 and 18:00 UTC, with a preference for workdays starting between 09:00 and 12:00 UTC.

📝 Enhancement Note: The salary range is provided in USD, but the role is located in Munich, Germany. This implies the company is likely US-based and pays a global remote salary, or there may be nuances in how compensation is structured for international employees that would need clarification during the interview process. The benefits are standard for a remote-first tech company, with a strong emphasis on employee well-being and professional development.

🎯 Team & Company Context

🏢 Company Culture

Industry: E-commerce Technology, AI/Machine Learning, Search & Discovery. Constructor is at the forefront of revolutionizing online shopping experiences with its GPT-based architecture.

Company Size: Constructor is a US-based company founded in 2019, indicating a growing startup or scale-up environment. The exact employee count isn't specified but its market presence suggests a dynamic and expanding team.

Founded: Founded in 2019 by Eli Finkelshteyn and Dan McCormick, who continue to lead the company. This implies a relatively young, agile organization driven by its founders' vision.

Team Structure:

• The Prospect UI Solutions team is a cross-functional unit designed to support the GTM process. It includes Software Engineers, Data Analysts, and works closely with Account Executives and Product Managers.

• Reporting structure likely involves a Engineering Manager or Lead, with direct collaboration across Sales and Product departments.

• The team emphasizes collaborative brainstorming, pair programming, and code reviews, fostering a supportive and knowledge-sharing environment. Methodology:

• Data-Driven Insights: The company prioritizes metrics that matter, such as revenue, conversion rate, and profit, driving decisions and development efforts.

• AI-First Approach: Development is guided by leveraging AI and GPT-based architecture to solve complex e-commerce challenges.

• Agile Development: Implied by the emphasis on continuous improvement, iterative development, and collaborative problem-solving.

Company Website: https://constructor.io

📝 Enhancement Note: Constructor's culture appears to be a blend of startup agility and a data-centric, customer-focused approach common in successful SaaS companies. The emphasis on "empathy, openness, curiosity, continuous improvement" suggests a positive and growth-oriented work environment. The company's focus on empowering its employees aligns with modern progressive workplace values.

📈 Career & Growth Analysis

Operations Career Level: This role is positioned as a Mid-Level FullStack Engineer, requiring 2-5 years of experience. It's an opportunity to grow into a senior or specialized role within the engineering team, potentially focusing on GTM technology, AI integration, or front-end architecture.

Reporting Structure: You will report to an Engineering Manager or Lead within the Prospect UI Solutions team, with significant collaboration with Sales leadership and Product Management. This cross-functional exposure is valuable for understanding business drivers.

Operations Impact: As a FullStack Engineer on this team, your work directly impacts Constructor's ability to acquire new enterprise clients. By building effective demos and integrations, you enable the sales team to showcase the value of Constructor's AI solutions, directly contributing to revenue growth and business development.

Growth Opportunities:

• Technical Specialization: Deepen expertise in JavaScript, React, Node.js, and specific AI/ML integration patterns relevant to e-commerce. Opportunity to become a subject matter expert in the Prospect UI Solutions domain.

• Cross-Functional Acumen: Gain in-depth understanding of the sales cycle, customer acquisition strategies, and the specific technical challenges faced by e-commerce prospects.

• Leadership Potential: As you gain experience, opportunities may arise to mentor junior engineers, lead smaller projects, or contribute to architectural decisions within the team.

• Open Source Contribution: Contribute to and potentially lead initiatives for Constructor's open-source JavaScript UI libraries and REST clients, enhancing your public profile and technical influence.

📝 Enhancement Note: This role offers a unique growth path for engineers who want to see a direct impact on business outcomes. The combination of deep technical development with direct involvement in the sales process provides a well-rounded experience that can accelerate career progression.

🌐 Work Environment

Office Type: This is a fully remote position, offering the flexibility to work from any location.

Office Location(s): While the company is US-based, this specific role is open to candidates in Germany, with the expectation of working within specific UTC time zone overlaps.

Workspace Context:

• Collaborative Remote Environment: The team utilizes modern collaboration tools and practices (pair programming, code reviews, team-building games) to foster connection and productivity in a remote setting.

• Technology Access: Employees are provided with Apple laptops and a work-from-home stipend to ensure they have the necessary tools and a comfortable workspace.

• Team Interaction: Regular virtual meetings and team offsites provide opportunities for direct interaction with colleagues across different functions.

Work Schedule: The role is full-time (40 hours/week) with flexible hours, provided the necessary UTC time zone overlap for team collaboration is met. This allows for a good work-life balance while ensuring effective communication with global teams.

📝 Enhancement Note: The "Fully remote team - choose where you live" benefit, coupled with the specific time zone requirements, suggests a globally distributed workforce. Candidates should be comfortable with asynchronous communication and proactive engagement in a remote-first culture.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: A recruiter or hiring manager will likely conduct an initial call to assess basic qualifications, cultural fit, and interest in the role. Be prepared to discuss your experience with JavaScript, front-end frameworks, and your motivation for joining Constructor.

• Technical Assessment: Expect a technical interview, which may include coding challenges (live coding or take-home assignment) focused on JavaScript, front-end development, or problem-solving relevant to the role's responsibilities. This could involve building a small UI component or solving an algorithm problem.

• System Design / Deeper Dive: A session focused on system design, architectural thinking, or a deeper dive into your past projects. Be ready to discuss how you've approached complex integrations, data challenges, or built scalable solutions.

• Team/Hiring Manager Interview: A conversation with the hiring manager and potentially team members to assess team fit, communication skills, and alignment with company values. This is where your collaboration style and ability to contribute to team culture will be evaluated.

• Final Round (if applicable): May involve a final interview with a senior leader or founder to discuss strategic alignment and long-term vision.

Portfolio Review Tips:

• Highlight GTM Impact: For each project, clearly articulate how your technical contributions supported business goals, such as improving user experience, enabling sales, or driving data quality.

• Showcase Full-Stack Capabilities: Present examples that demonstrate your proficiency across both front-end (UI, user experience) and back-end (APIs, data processing, integrations).

• Detail Your Process: Explain your development process, including how you approach problem-solving, testing, collaboration, and optimization. Use specific examples from your projects.

• Quantify Achievements: Whenever possible, use metrics to quantify the impact of your work (e.g., "reduced load time by X%", "improved conversion rate by Y%", "supported Z number of successful sales demos").

• Open Source Contributions: If you have contributions to Constructor's libraries or other relevant open-source projects, be prepared to discuss them in detail.

Challenge Preparation:

• Practice Core JavaScript & Frameworks: Refresh your knowledge of JavaScript fundamentals, modern ES features, and your primary front-end framework (React is a strong asset here).

• Understand ETL & Data Flow: Be prepared to discuss how data moves through systems and how you ensure its integrity.

• Customer Empathy: Think about how you would approach technical challenges from a customer's perspective, especially in the context of sales demonstrations.

• Collaboration Scenarios: Be ready to discuss how you handle code reviews, give and receive feedback, and collaborate with non-technical stakeholders.

📝 Enhancement Note: The interview process is likely structured to assess both technical prowess and the candidate's ability to operate effectively within a GTM-focused engineering team. A strong understanding of how engineering decisions impact sales and customer acquisition will be a significant advantage.

🛠 Tools & Technology Stack

Primary Tools:

• JavaScript: The core programming language for both front-end and back-end development.

• React: A primary front-end library for building UIs and dashboards.

• Redux: For state management in React applications.

• Node.js: For server-side logic and API development.

• ClickHouse: A high-performance columnar database for analytics and data warehousing.

• OpenSearch: A distributed search and analytics engine, likely used for indexing and querying data.

Analytics & Reporting:

• React/Redux/Node.js: Used for building custom dashboards and reporting interfaces.

• ClickHouse & OpenSearch: The backend data sources for analytics and performance monitoring.

• Potential for BI Tools: While not explicitly mentioned, the company might use other BI tools for broader analytics.

CRM & Automation:

• CRM: Not explicitly mentioned, but likely used by the Sales team (e.g., Salesforce, HubSpot) with which this role's output integrates.

• Automation: Focus on CI/CD pipelines, automated testing (Cypress, Jest, React Testing Library), and potentially workflow automation within the development process.

• Integration: Experience with building and consuming REST APIs is crucial.

📝 Enhancement Note: This tech stack is modern and focused on high-performance data processing and interactive UIs, common in AI-driven SaaS companies. Familiarity with all components is highly advantageous, but a strong foundation in JavaScript and React, coupled with a willingness to learn the others, is essential.

👥 Team Culture & Values

Operations Values:

• Customer Focus: A strong emphasis on understanding and solving customer problems, particularly in the pre-sales and onboarding phases.

• Data-Driven Decision Making: Prioritizing metrics that demonstrate impact on revenue, conversion, and profit.

• Continuous Improvement: A commitment to learning, iterating, and optimizing processes and code.

• Empathy & Collaboration: Fostering a supportive environment where team members help each other grow and succeed.

• Ownership & Accountability: Taking responsibility for code quality and the impact of solutions.

Collaboration Style:

• Cross-Functional Integration: Seamless collaboration between Engineering, Product, Sales, and Data Science teams is critical for success.

• Open Communication: Encouraging open feedback through code reviews and problem-solving sessions.

• Knowledge Sharing: Actively participating in discussions and sharing insights to elevate the team's collective expertise.

📝 Enhancement Note: The company explicitly states values like empathy, openness, curiosity, and continuous improvement. For this role, these translate to a collaborative engineering environment that is closely aligned with business objectives, particularly sales enablement.

⚡ Challenges & Growth Opportunities

Challenges:

• Bridging Technical and Sales Needs: Effectively translating complex technical capabilities into compelling demonstrations for prospects and addressing their specific use cases.

• Data Integrity and Scalability: Ensuring the accuracy and quality of prospect data while building scalable solutions that can handle growing demands.

• Rapidly Evolving AI Landscape: Staying current with advancements in AI and GPT-based technologies and adapting solutions accordingly.

• Global Time Zone Coordination: Effectively collaborating with team members across different time zones to maintain project momentum and team cohesion.

Learning & Development Opportunities:

• Advanced AI/ML Integration: Deepen understanding of how AI models are trained, deployed, and integrated into customer-facing applications.

• E-commerce Industry Expertise: Gain significant insight into the intricacies of e-commerce search, discovery, and personalization strategies.

• Full-Stack Mastery: Enhance skills across the entire stack, from front-end UI/UX to back-end services and data infrastructure.

• GTM Strategy Insight: Learn firsthand how engineering supports sales and business development, providing a valuable perspective for career growth.

📝 Enhancement Note: This role presents a unique opportunity to tackle challenges at the intersection of cutting-edge AI technology and direct business development, offering substantial professional growth beyond a typical software engineering path.

💡 Interview Preparation

Strategy Questions:

• "Describe a time you had to integrate a complex system or data source for a client. What were the challenges, and how did you overcome them?" (Focus on ETL, data validation, and problem-solving.)

• "How would you approach building a demo for a large e-commerce client to showcase Constructor's AI search capabilities? What data would you need, and what UI elements would be crucial?" (Assess understanding of GTM needs and technical implementation.)

• "Imagine a prospect has a technical question about our API that you can't immediately answer. How would you handle that situation to ensure confidence and provide a timely resolution?" (Evaluate communication, problem-solving, and stakeholder management.) Company & Culture Questions:

• "What interests you most about Constructor's AI-first approach to e-commerce search and discovery?" (Demonstrate research and alignment with company mission.)

• "How do you contribute to a positive and collaborative team culture, especially in a remote environment?" (Assess cultural fit and teamwork.)

• "How do you ensure the quality and reliability of your code, especially when it directly impacts sales outcomes?" (Connect technical practices to business impact.) Portfolio Presentation Strategy:

• Structure Your Case Studies: For each project, use a STAR (Situation, Task, Action, Result) or similar framework. Clearly outline the problem, your role, the actions you took, and the quantifiable results.

• Focus on GTM Impact: Emphasize how your technical contributions directly enabled sales, improved prospect experience, or solved critical business challenges for clients.

• Showcase Technical Depth & Breadth: Be ready to discuss the technical details of your projects, including architecture, chosen technologies, and problem-solving approaches, while also highlighting your full-stack capabilities.

• Be Prepared for Q&A: Anticipate questions about your technical decisions, trade-offs made, and how you would adapt your solutions to different scenarios.

📝 Enhancement Note: Interview preparation should focus on demonstrating not just technical proficiency but also an understanding of the business context and the direct impact of engineering work on revenue generation and customer acquisition.

📌 Application Steps

To apply for this operations-aligned software engineering position:

• Submit your application through the provided link on Ashby.

• Tailor Your Resume: Highlight experience with JavaScript, React, Node.js, and any relevant front-end or data integration projects. Quantify achievements wherever possible, especially those related to efficiency, problem-solving, or customer impact.

• Prepare Your Portfolio: Select 2-3 key projects that best showcase your full-stack capabilities, UI/UX design skills, and experience with data integration or supporting business processes. Be ready to walk through them, explaining your role, technical approach, and the impact achieved.

• Research Constructor: Understand their product, target market (e-commerce), and their AI-first approach. Familiarize yourself with their company values and recent news.

• Practice Technical & Behavioral Questions: Prepare for coding challenges and be ready to discuss your experience with collaborative development, problem-solving, and customer interaction in a technical context.

⚠️ Important Notice: This enhanced job description includes AI-generated insights and operations industry-standard assumptions. All details should be verified directly with the hiring organization before making application decisions.

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