Constructor is the next-generation platform for search and discovery in ecommerce, built to explicitly optimize for metrics like revenue, conversion rate, and profit. Our search engine is entirely invented in-house utilizing transformers and generative LLMs, and we use its core and personalization capabilities to power everything from search itself to recommendations to shopping agents. Engineering is by far our largest department, and we’ve built our proprietary engine to be the best on the market, having never lost an A/B test to a competitive technology. We’re passionate about maintaining this and work on the bleeding edge of AI to do so.

Out of necessity, our engine is built for extreme scale and powers over 1 billion queries every day across 150 languages and roughly 100 countries. It is used by some of the biggest ecommerce companies in the world like Sephora, Under Armour, and Petco.

We’re a passionate team who love solving problems and want to make our customers’ and coworkers’ lives better. We value empathy, openness, curiosity, continuous improvement, and are excited by metrics that matter. We believe that empowering everyone in a company to do what they do best can lead to great things.

Constructor is a U.S. based company that has been in the market since 2019. It was founded by Eli Finkelshteyn and Dan McCormick who still lead the company today.

Requirements

Constructor is seeking an experienced AI Engineer to design and build our Agent Products. In this role, you will focus on developing and rigorously evaluating sophisticated RAG pipelines and agentic workflows that power new ways of shopping. Our LLM -powered agents utilize various tools to interact with customers’ catalogs, enable advanced retrieval, and assist with browsing to answer open-ended user queries. These agents provide high-quality, well-cited answers and deliver exceptional product recommendations.

Responsibilities:

• Architect and build  real-time agentic workflows to handle complex, multi-step user tasks and open ended queries to provide users with accurate and contextually relevant answers and product suggestions.
• Own the end-to-end data lifecycle for AI workflows, vector database ingestion and indexing.
• Design metrics to evaluate the relevance and performance of query results, ensuring they align with business goals and user expectations.
• Generate and rapidly prototype novel product hypotheses that leverage LLMs, RAG, and agentic systems.
• Collaborate closely with Product, Design, Analytics and other engineering teams to translate AI capabilities into tangible, high-quality product features.
• Improve the speed, quality, and efficiency of our AI systems and engineering processes.
• Take ownership of systems and designs, from conception through to deployment and maintenance.

Qualifications:

• 4+ years of industry experience in related fields, including search, information retrieval, recommendation systems, applied machine learning, and NLP.
• Excellent skills in delivering and communicating business value.
• Proficient in Python, SQL, and big data stack for end-to-end ML product development, with experience working across the entire pipeline in typical recommendation systems or LLM-based solutions.
• Strong grasp of Information Retrieval (IR) techniques (e.g., dense retrieval, re-ranking, chunking strategies).
• Direct experience with Retrieval-Augmented Generation (RAG); experience building autonomous agents is a strong plus.
• Nice to have: Experience with automatic prompt optimization techniques, such as DSPy.
• Solid understanding of ML evaluation methodologies and key information retrieval metrics.
• Passion for shipping high-quality products and a self-motivated drive to take ownership of tasks.

Tech Stack:

• Core: Python, Fast API, asyncio, Airflow, Luigi, PySpark, Docker, LangGraph
• Data Stores: Vector Databases, DynamoDB, AWS S3, AWS RDS
• Cloud & MLOps: AWS, Databricks, Ray

Benefits

• 🏝️ Unlimited vacation time - we strongly encourage all of our employees take at least 3 weeks per year
• 🌎 Fully remote team - choose where you live 
• 🛋️ Work from home stipend! We want you to have the resources you need to set up your home office 
• 💻 Apple laptops provided for new employees
• 🧑‍🎓 Training and development budget for every employee, refreshed each year
• 👪 Maternity & Paternity leave for qualified employees
• 🧠 Work with smart people who will help you grow and make a meaningful impact
• 💵 This position has a base salary range between $80k and $120k USD. The offer varies on many factors including job related knowledge, skills, experience, and interview results.
• 🎉 Regular team offsites to connect and collaborate

Diversity, Equity, and Inclusion at Constructor

At Constructor.io we are committed to cultivating a work environment that is diverse, equitable, and inclusive. As an equal opportunity employer, we welcome individuals of all backgrounds and provide equal opportunities to all applicants regardless of their education, diversity of opinion, race, color, religion, gender, gender expression, sexual orientation, national origin, genetics, disability, age, veteran status or affiliation in any other protected group. Studies have shown that women and people of color may be less likely to apply for jobs unless they meet every one of the qualifications listed. Our primary interest is in finding the best candidate for the job. We encourage you to apply even if you don’t meet all of our listed qualifications.

• Blockchain Traffic Management, including stateful failover between multiple external providers
• Managing data consistency and block freshness to power critical internal services, such as our wallets and indexers
• Ensuring reliability and scalability across the blockchain platform stack
• Pioneering new technologies such as decoupling blockchain node storage and compute
• Building a platform on top of our existing nodes to reduce engineering effort and ops TOIL

The Role:

We are looking for a Senior Fullstack Developer skilled in React.js and Node.js for one of our clients. You are a perfect candidate if you are growth-oriented, you love what you do, and you enjoy working on new ideas to develop exciting products.

• 5+ years experience as a Fullstack Developer.

• Backend experience with:

• Node.js

• Microservices architecture

• Database experience with:

• SQL

• MongoDB

• Intermediate-advanced English

• Located in CET timezone (+/- 3 hours).

• Database Architecture knowledge.

• Ability to build libraries and frameworks of reusable efficient code.

• Competence in designing and implementing low-latency, stable and performing applications.

• Capacity to effectively collaborate with other team members and stakeholders remotely.

• Ability to implement data protection systems.

• Competence in data storage solutions.

What we offer:

• Get paid, not played

• No more unreliable clients. Enjoy on-time monthly payments with flexible withdrawal options.

• Predictable project hours
• Enjoy a harmonious work-life balance with consistent 8-hour working days with clients.
• Flex days, so you can recharge
• Enjoy up to 24 flex days off per year without losing pay, for full-time positions found through Proxify.
• Career-accelerating positions at cutting-edge companies
• Discover exclusive long-term remote positions at the world's most exciting companies.
• Hand-picked opportunities just for you
• Skip the typical recruitment roadblocks and biases with personally matched positions.
• One seamless process, multiple opportunities
• A one-time contracting process for endless opportunities, with no extra assessments.

• Compensation
• Enjoy the same pay, every month with positions landed through Proxify.

Explore the Nearsure experience! 

🌐 Join our close-knit LATAM remote team: Connect through fun activities like coffee breaks, tech talks, and games with your team-mates and management. 

🍃 Say goodbye to micromanagement! We champion autonomy, open communication, and respect for diversity as our core values. 

⚖️Your well-being matters: Our People Care team is here from day one to support you with everything from time-off requests to wellness check-ins. 

Plus, our Accounts Management team ensures smooth, effective client relationships, so you can focus on what you do best. 

Ready to grow with us? 🚀 
 
Here’s what we offer you by joining us! 
 
✨ Competitive USD salary 💲 – We value your skills and contributions! 

🌐 100% remote work 🏢 – While you can work from anywhere, you’re always welcome to connect with teammates and grow your network at our coworking spaces across LATAM!  

💼 Paid time off – Take the time you need according to your country’s regulations, all while receiving your full salary. Rest, recharge, and come back stronger!  

🎉 National Holidays celebrated 🌴 – Take time off to celebrate important events and traditions with loved ones, fully embracing your culture. 

😷 Sick leave – Focus on your health without the stress. Take the necessary time to recover and feel better. 

💸 Refundable Annual Credit – Spend it on the perks you love to enhance your work-life balance! 

🤝 Team-building activities – Join us for coffee breaks, tech talks, and after-work gatherings to bond with your Nearsure family and feel part of our vibrant community. 

🥳 Birthday day off 🎂 – Enjoy an extra day off during your birthday week to celebrate in style with friends and family! 
 
 
About the project 
 
As a .NET Engineer Lead, you will develop, maintain, test, and optimize a new modern software platform architecture, shifting the client away from the monolithic products and services that are currently the core platform. You will report to the Manager of Software Engineering. 
 
 
How your day-to-day work will look like 
 
✅ Define and oversee migration strategy and architecture. 
✅ Support and unblock the team across the codebase, architecture, and cloud infrastructure. 
✅ Ensure test coverage, CI/CD practices, and code quality compliance. 
✅ Coordinate work between both application migration streams. 
✅ Communicate with stakeholders and product managers. 
 
This would make you the ideal candidate 
 
✨ Bachelor's Degree in Computer Science, Engineering, or a related field.  
✨ Expert in C#, .NET Framework (4.5/4.8), and .NET Core / .NET 8. 
✨ Experience working with Azure (App Services, Redis, Functions, SQL, Traffic Manager). 
✨ Experience leading CI/CD with Jenkins & Azure DevOps. 
✨ Strong understanding of authentication (OAuth2, Google/Facebook Auth, Windows AD). 
✨ Solid knowledge of API lifecycle management. 
✨ Logging/Monitoring: Datadog, Log4Net, SonarQube. 
✨ Testing strategy: Selenium (Python), XUnit/MSTest, TestRail. 
✨ Advanced English Level is required for this role as you will work with US clients. Effective communication in English is essential to deliver the best solutions to our clients and expand your horizons. 
 
What to expect from our hiring process 
 
1️. Let’s chat about your experience!  
2. Impress our recruiters, and you’ll move on to a technical interview with our top developers.  
3. Nail that, and you’ll meet our client - your final step to joining our amazing team! 
 
🎯 At Nearsure, we’re dedicated to solving complex business challenges through cutting-edge technology and we believe in the power of tailored solutions. Whether you are passionate about transforming businesses with Generative AI, building innovative software products, or implementing comprehensive enterprise platform solutions, we invite you to be part of our dynamic team! 

We would love to hear from you if you are eager to make an impact and join a collaborative team that values creativity and expertise.  

Let’s work together to shape the future of technology!  

🧑‍💻 Apply now! 

About Us:

Chalice Custom Algorithms (chalice.ai) is the leading AI solution for brands applying their own data and analytics to real-time decisioning in ad buying. Our platform automates data ingestion, predictive analytics, and the deployment of custom bidding logic across all major DSPs, Meta, and YouTube. Chalice has been recognized as “Best Demand Side Tech” by AdExchanger and powered AdWeek’s “Best Use of Programmatic” in the 2023 Media Plan of the Year awards.

About the Role:
We are seeking a Director of Machine Learning Engineering (MLE) to lead the architecture, deployment, and optimization of our machine learning infrastructure and models. This role will report directly to the VP of Data Science and Analytics, manage our Senior MLE(s), and collaborate closely with the Engineering Architect to design and scale robust, low-latency enterprise pipelines. The Director will also mentor junior software engineers in machine learning engineering best practices, fostering growth across the team.

This is a high-impact position for a leader who thrives at the intersection of ML infrastructure, production systems, and business value delivery. You will help define the technical vision, ensure delivery of scalable AI solutions, and drive cross-functional initiatives that shape our platform’s evolution.

Key Responsibilities:

Lead the design, development, and deployment of scalable machine learning systems leveraging Databricks, PySpark, Rust, and Kubernetes for both low-latency applications and offline training pipelines.

• Oversee LLMs and neural network predictive modeling pipelines, ensuring performance, observability, and alignment with product strategy.

• Own the full ML lifecycle—from data ingestion and feature engineering to model deployment and performance monitoring.

• Collaborate with the Engineering Architect to build robust, fault-tolerant, and maintainable ML pipelines that support enterprise scale.

• Manage and mentor a growing team of 3 senior and junior MLEs and collaborate closely with software engineers, fostering technical excellence, code quality, and architectural rigor.

Own the end-to-end machine learning lifecycle from data ingestion and feature engineering through model deployment and monitoring.

• Partner with product, data science, and engineering teams to translate business objectives into technical solutions that drive measurable outcomes.

• Guide adoption of emerging technologies and techniques (e.g., LoRA, quantization, vector stores, Rust microservices for model serving) to improve model efficiency and latency.

• Ensure compliance with audit, privacy, and security standards in all ML engineering efforts.

Qualifications:

• 8+ years of industry experience in machine learning engineering, with at least 3+ years leading ML engineering teams.

• Deep experience building low-latency machine learning systems using Kubernetes, Rust, PySpark, and Databricks, Pytorch, Tensorflow, and state of the art neural network packages.

• Proven track record in designing and deploying LLM- and neural network-based solutions at scale.

• Experience with CI/CD Integrations and ML Data and Model versioning

• Mastery of MLOps tools and processes (MLflow, Prometheus, Grafana, Airflow, etc.).

• Strong experience with cloud platforms (AWS, Databricks) and production data engineering at scale.

• Ability to influence architecture and strategy while being hands-on when necessary.

• Experience in mentoring and developing technical talent across seniority levels.

• Excellent communication and collaboration skills to partner across product, engineering, and executive teams.

• Advertising technology or performance marketing experience is a strong plus.

Why Join Us:

At Chalice, you’ll be at the forefront of AI-driven advertising innovation. We offer:

• A collaborative, high-performance environment where your work shapes the future of custom AI for brands.

• Competitive compensation plus performance incentives.

• Comprehensive benefits (medical, dental/vision, 401k options, unlimited PTO, 11 company holidays, year-end closure).

• A culture that values transparency, non-conformity, and diversity of thought.

Job Title: Developer for Dealer Services

Job Type: Full-time

Years of exp: 7+

Essential Job Functions:
- Understands the full picture and helps operations with monitoring, dashboards etc.
 - work with architect on design
 - constantly keeps an eye on cost and performance of the system
 - work with BA on the integration requirements
 - Ability to trouble shoot performance issue and other functional issues
 - Attention to details and documents the key decisions made
 - Able to mentor or guide junior developers and do code reviews
 - Ability to handle fast paced projects and willing to look into production issues

Job Summary:
Looking for a developer who has hands on experience with Databricks/Pyspark , Java, Webservices. Position is long term and will likely be renewed annually.

Minimum Qualifications and Job Requirements:
* Must be a team player.
 * Must have at least 5 years of IT development experience.
 * Must have strong analytical and problem-solving skills.
 * Must have experience in designing solutions, performing code reviews, mentoring junior engineers.
 * Must have strong SQL and backend experience, and working on data driven projects.

Must have following experience:
Python/PySpark
SQL/ PL/SQL
Databricks
 * Java/C#
 * Preferred to have following experience:
Azure
Kafka
Node JS
Azure Data Factory

Other Responsibilities:
* Document and maintain project artifacts.
 * Maintain comprehensive knowledge of industry standards, methodologies, processes, and best practices.
Promptly report any known or suspected loss, theft or unauthorized disclosure or use of PI to the General Counsel/Chief Compliance Officer or Chief Information Officer.
 * Safeguard the company's assets.
 * Adhere to the company's compliance program.
 * Maintain comprehensive knowledge of industry standards, methodologies, processes, and best practices.
 * Maintain focus on customer-service, efficiency, quality, and growth.
 * Collaborating with additional team members
 * Other duties as assigned

Who We Are

TetraScience is the Scientific Data and AI Cloud company. We are catalyzing the Scientific AI revolution by designing and industrializing AI-native scientific data sets, which we bring to life in a growing suite of next gen lab data management solutions, scientific use cases, and AI-enabled outcomes. 

TetraScience is the category leader in this vital new market, generating more revenue than all other companies in the aggregate. In the last year alone, the world’s dominant players in compute, cloud, data, and AI infrastructure have converged on TetraScience as the de facto standard, entering into co-innovation and go-to-market partnerships: Latest News and Announcements | TetraScience Newsroom:

In connection with your candidacy, you will be asked to carefully review the Tetra Way letter, authored directly by Patrick Grady, our co-founder and CEO. This letter is designed to assist you in better understanding whether TetraScience is the right fit for you from a values and ethos perspective. 

It is impossible to overstate the importance of this document and you are encouraged to take it literally and reflect on whether you are aligned with our unique approach to company and team building. If you join us, you will be expected to embody its contents each day. 

You thrive on working well with others. You make the people around you better. You love to collaborate with fellow team members, customers, field engineers, executives, and inspire them to do their best.

You relentlessly strive to excel in your craft. You are passionate about delivering delightful customer experiences. You take ownership of all the aspects of the customer journey from beginning of case creation, to resolution.

You consistently seek understanding and clarity. You look at every interaction as an opportunity to learn. You aren’t afraid to ask questions. You have the humility and confidence to not be the smartest person in the room.

• This position includes working with customers to address customer technical issues. You will be the responsible to investigate end-to-end stability, scale and performance issues reported by TetraScience customers.
• Drive issues to resolution and/or identify workarounds to unblock customers either individually or by partnering with product and the engineering teams.
• Simulate customer issues in lab to reproduce performance & scalability issues to increase product reliability.
• You will be the steward of the customer support to the engineering escalation process, increasing efficiency by streamlining communication with customer success, by triaging, extracting, and documenting relevant information
• Develop tools, scripts, benchmarks, and documentation to scale yourself individually, and help customer support diagnose, troubleshoot, extract relevant information, and in cases, fix issues to reduce mean time to resolution.

Requirements

• 7+ years of experience with a proven track record of excellence in Performance, Scale, Resiliency and Customer Support
• Experience resolving technical support issues and escalations efficiently
• Must have troubleshooting experience with API and various types of integration at scale in AWS
• Must have experience with CloudNative platforms and applications, Micro-services, Docker and SaaS deployments
• Must have experience with at least two of the following technologies: Databases, NoSQL, Kafka/Queueing Service, or Elastic Search
• Experience in one or more of the scripting or programming languages: Python, PHP, JavaScript, React, Go or Java
• Demonstrated experience of debugging software reliability issues in a distributed environment
• Must have excellent interpersonal and communications skills. Must be self driven, innovative, and willing to take initiative.
• Strong familiarity with using CRMs like Zendesk or Salesforce
• Bachelor's degree in engineering, or technical related field

Benefits

• Competitive Salary and equity in a fast growing company
• Supportive, team oriented culture of continuous improvement.
• 100% employer paid benefits for all eligible employees.
• 401K
• Generous paid time off (PTO)
• Flexible working arrangements - Remote work + Boston office as needed

TetraScience is the Scientific Data and AI Cloud company. We are catalyzing the Scientific AI revolution by designing and industrializing AI-native scientific data sets, which we bring to life in a growing suite of next gen lab data management solutions, scientific use cases, and AI-enabled outcomes. TetraScience is the category leader in this vital new market, generating more revenue than all other companies in the aggregate.

BUMP provides secure charitable lottery and fundraising platform solutions to most recognizable professional sports foundations and well-known and distinguished not-for-profits across North America. BUMP is a division of Canadian Bank Note Company (CBN).

CBN designs and develops industry leading solutions for the following domains: Border Security, Civil Identity, Driver Identification and Vehicle Information, Currency and Excise Control, and Lottery and Charitable Gaming.

Our 7 Core Principles shape and guide our corporate behaviours and underpin the sense of community you will experience at BUMP. We pride ourselves on fostering a supportive and collaborative work environment, where employees are valued for their contributions and encouraged to grow professionally.

At BUMP we seek long-term relationships with our employees and recognize and reward them with a competitive total compensation package that includes:

• An industry-leading defined contribution pension plan with company matching contributions (up to 5%) and payment of service fees;
• Best-in-class health, medical, and life insurance benefits;
• Access to virtual and telehealth services and apps; and
• Very progressive fertility, adoption, and surrogacy benefits to support all definitions of family.

Internal Job Title: Full Stack Developer
Job Type: Permanent, Full-Time
Job Location: Canada
Work Model: Remote (Canada)

Position Summary

As a Full Stack Developer in our BUMP group, you will design, build, and maintain the enterprise level digital platforms that we develop for charities and not-for-profits. These fundraising solutions help our partners significantly change people’s lives and communities for the better. In this position, you will be exposed to the full system as you participate in large-scale projects while mentoring other team members. Your expertise will also be leveraged to shape and guide our technology roadmap.

Duties and Responsibilities

• Design and Development
  • Facilitate the design and development of multi-tenant auto scaling solutions using the latest technologies.
• Solution Architecture
  • Work on end-to-end solution architecture for large scale Lottery and Gaming projects.
• Technical Support and Mentoring
  • Provide 2nd level technical support and mentoring to Service Desk and Technical Support teams.
  • Mentor junior level developers.
• Various other duties and responsibilities

Knowledge and Experience

• Bachelor’s degree in Computer Science, Information Technology or related field or an equivalent combination of relevant education and additional work experience
• Knowledge of the following:
  • OWASP principles and secure coding practices
  • Agile development methodologies
  • UI/UX design principles
  • DevOps practices and tools (asset)
  • Cloud computing (asset)
• 5+ years of software development experience with relevant technologies
• Experience developing Point of Sale, payment processing, and eCommerce solutions
• Experience with relevant AWS technologies is an asset

Technical Environment

• Programming Languages: Typescript, PHP 8.0+, SQL, GraphQL
• Frameworks and Libraries: React, Laravel
• RDBMS: MySQL
• Containerization: Docker, AWS (ECS, ECR)
• Cloud: AWS (ALB, ASG, S3, Cloudfront), Azure
• DevOps: Azure DevOps

Soft Skills and Characteristics

• Critical thinking skills
  • Analysis, problem solving
• Interpersonal skills
  • Communication, teamwork and collaboration, leadership
• Organization/time management/prioritization skills
• Growth mindset
• Self-directed
• Adaptable

Mandatory Requirements

• Fluency in English (reading, writing, speaking)
• Ability to travel domestically (or) internationally (passport required) approx. 1 weeks/year

CBN designs and develops industry leading solutions for the following domains: Border Security, Civil Identity, Driver Identification and Vehicle Information, Currency and Excise Control, and Lottery and Charitable Gaming. To learn more, visit www.cbnco.com.

As an Equal Opportunity Employer, Canadian Bank Note Company, Limited is committed to achieving a skilled workforce that reflects the diversity of the Canadian population. We encourage applications from women, visible minorities, people with disabilities and Aboriginal people. Canadian Bank Note Company Limited is committed to developing inclusive, barrier-free selection processes and work environments.  

If contacted regarding this competition, please advise the interview coordinator of any accommodation measures you may require. 

We are looking for a talented infrastructure security engineer to join our team and help protect our platform, systems, and user data. As a Security Engineer, you will be instrumental in identifying vulnerabilities, implementing and improving security controls, and ensuring that security is embedded into our products from the ground up.

• Design and build security-focused infrastructure primitives and integrate them into our existing products and development processes
• Perform technical security assessments, code audits, and design reviews
• Lead remediation of prioritized issues across our technology stack
• Partner with engineering teams to design and deploy solutions which are inherently secure
• Conduct assessments to identify current and new attack vectors against our products and services
• Help run penetration testing and our security-related compliance efforts
• Advocate for security best practices throughout the organization

• 5+ years of experience building software with at least 2 years focused on platform, infrastructure, and/or security
• Strong understanding of web application security, cloud security (GCP preferred), and secure coding practices
• Proficiency in at least one general purpose programming language (TypeScript experience preferred)
• Experience with authentication and authorization systems
• Strong communication and interpersonal skills, with demonstrated experience collaborating across functions
• Desire to work in a fast-paced environment, continuously grow, and master your craft

• Experience with TypeScript and GCP (GKE and other core services)
• Experience with Terraform infrastructure as code
• Background in developing security tooling and automation
• Experience working on identity and access management systems
• Demonstrated ability to make hard prioritization decisions in security controls

The base salary range for this role is $187,000- $227,000/year. Final offer amounts will carefully consider multiple factors, including prior experience, expertise, location, and may vary from the amount above.