Company Overview: Lean Tech is a rapidly expanding organization situated in Medellín, Colombia. We pride ourselves on possessing one of the most influential networks within software development and IT services for the entertainment, financial, and logistics sectors. Our corporate projections offer a multitude of opportunities for professionals to elevate their careers and experience substantial growth. Joining our team means engaging with expansive engineering teams across Latin America and the United States, contributing to cutting-edge developments in multiple industries. Role Overview We are looking for a highly skilled Sr RPA Developer with strong experience in Playwright and browser automation to join our team. This role focuses on designing and implementing automation solutions that streamline business processes and integrate with third-party systems. The ideal candidate is a self-driven individual contributor who thrives with minimal supervision, communicates effectively, and leverages modern AI-assisted development tools to accelerate delivery. Remote role : LATAM only Required Qualifications (Main skills) - 5+ years of experience as an RPA Developer or Automation Engineer - Strong hands-on experience with Playwright for browser automation - Proven experience building end-to-end automation workflows across web platforms - Experience integrating with third-party APIs (RESTful services) - Experience with TypeScript - Familiarity with AI-assisted development tools (e.g., code generation, testing assistants, or similar technologies) - Strong understanding of software development best practices and version control Nice to Have - Background in integration-heavy domains (insurance, fintech, SaaS, or similar) - Experience with other RPA tools. Key Skills & Competencies - Ability to work as an independent contributor with minimal supervision - Strong communication skills, both technical and non-technical - Excellent problem-solving and debugging abilities - High attention to detail and commitment to quality - Strong organizational and time management skills - Adaptability and a proactive, solution-oriented mindset - Prior experience in startups or high-growth environments Why you will love Lean Tech: - Join a powerful tech workforce and help us change the world through technology - Professional development opportunities with international customers - Collaborative work environment - Career path and mentorship programs that will lead to new levels. Join Lean Tech and contribute to shaping the data landscape within a dynamic and growing organization. Your skills will be honed, and your contributions will play a vital role in our continued success. Lean Tech is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.

Overview We are looking for a Senior Back‑end Engineer to design and build scalable, secure, and high‑performance backend systems that power modern SaaS applications. In this role, you will lead the architecture and development of .NET‑based microservices, define APIs that align with frontend workflows, and contribute to cloud‑native solutions on Azure. You will work closely with cross‑functional teams to deliver reliable backend services that support real‑time user experiences, AI‑driven capabilities, and enterprise‑grade platforms. Primary Location: Across Canada or USA Work Model: Fully Remote Employment Type: Contractor Vacancy Status: New RESPONSIBILITIES - Design and implement scalable backend architectures supporting frontend SaaS applications using .NET microservices - Define and maintain API contracts aligned with frontend workflows and UI data requirements - Lead the design of microservices for knowledge base management, agent configuration, integrations, and chat services - Architect and implement secure authentication and authorization services using enterprise identity solutions - Build high‑availability REST and event‑driven APIs to support real‑time user interactions - Design and maintain Azure‑based cloud infrastructure including App Services, API Management, Service Bus, and storage solutions - Develop Python‑based services for AI model orchestration, data processing, and retrieval‑augmented generation pipelines - Implement scalable services for conversation history and context management - Establish CI/CD pipelines and DevOps practices for microservices deployment - Ensure system observability through logging, monitoring, and distributed tracing - Define backend performance optimization strategies and caching mechanisms - Mentor backend engineers and promote architectural best practices QUALIFICATIONS, SKILLS & EXPERIENCE - Strong experience designing and building backend systems using .NET and microservices architectures - Experience designing and consuming REST and event‑driven APIs - Hands‑on experience with Azure cloud services and cloud‑native architectures - Proficiency in backend API design, scalability, and performance optimization - Experience with authentication and authorization in enterprise environments - Working knowledge of CI/CD pipelines and DevOps practices - Experience with Python for backend services, data processing, or AI‑related workloads - Ability to collaborate effectively with frontend engineers, architects, and product teams - Experience mentoring engineers or providing technical leadership NICE TO HAVE - Experience working with AI platforms, model orchestration, or RAG pipelines - Familiarity with distributed systems observability tools and practices - Experience designing real‑time or conversational systems - Exposure to large‑scale SaaS or enterprise platforms - Experience with Retrieval-Augmented Generation (RAG) patterns for AI-driven applications ABOUT ADASTRA Adastra is a global leader in AI and data-driven transformation, helping organizations lead with artificial intelligence—responsibly, strategically, and at scale. With over 25 years of experience, Adastra empowers enterprise clients to unlock business value through data innovation, operational excellence, and smart customer engagement. Trusted by some of the world’s most prominent brands, Adastra delivers end-to-end solutions grounded in thoughtful strategy, robust governance, and deep technical expertise. From defining vision to ensuring execution, Adastra guides organizations through every stage of their AI, data and cloud journey—building future-ready capabilities and delivering measurable, lasting impact. Adastra serves clients across key industries including financial services, automotive, manufacturing, technology, media and telecom (TMT), healthcare, retail, and professional services. The company employs more than 2,000 professionals across North America, Europe, and Asia. WHAT WE OFFER - Opportunity for advancement and career progression - Competitive compensation - Successful referral program - The opportunity to work with one of Canada’s 50 Best Managed Companies - Satisfaction of working for a reputable company - A flexible, dynamic, and diverse workplace EQUAL OPPORTUNITY EMPLOYER In our commitment to promote fair and equitable treatment of all employees and applicants, Adastra Corporation provides equal employment opportunities for all individuals regardless of age, sex, disability, race, ethnic origin, citizenship, creed, sexual orientation, marital status, or any other ground as described in the Ontario Human Rights Code. In addition, accommodation will be provided during the hiring process. Adastra Corporation’s implementation and support of employment initiatives, encourage diversified labour force participation and equal access to opportunities based on merit and performance. AI Usage - Our hiring process includes the use of AI-enabled tools to screen applications (e.g., keyword matching, qualification ranking). A human recruiter reviews all AI-generated shortlists to make informed hiring decisions. There has been an increased instance of fraudulent job offers coming from people posing as Adastra HR employees. Please note that Adastra will never request fees as part of our recruiting process and any emails sent to you that are not from ‘@adastragrp.com’ or ‘@talent.icims.com’ are fraudulent. All employment offers are sent via DocuSign and if you receive an employment offer from a suspicious email and not via DocuSign, it is fraudulent. Contact careers@adastragrp.com to inquire about jobs at Adastra, to report a suspicious request for money or personal information from external websites or suspicious employment offers.

Overview We are seeking a Back‑end Engineer to design, build, and maintain reliable backend services that support modern, user‑focused applications. In this role, you will develop .NET‑based APIs and microservices, integrate cloud services on Azure, and contribute to backend systems that power chat, ticketing, and configuration workflows. You will work closely with front-end engineers and other stakeholders to ensure backend solutions are scalable, secure, and aligned with product needs. Primary Location: Across Canada or USA Work Model: Fully Remote Employment Type: Contractor Vacancy Status: New RESPONSIBILITIES - Develop RESTful APIs using .NET to support frontend application workflows - Implement microservices for knowledge base management and configuration - Build backend services for agent creation, model configuration, and tool integration - Support chat and ticketing workflows, including conversation context persistence - Integrate Azure services such as storage, messaging, and identity management - Implement authentication and authorization mechanisms - Develop Python asset modules for data processing and AI pipeline support - Collaborate with frontend developers to ensure API usability and performance - Write unit tests and maintain backend technical documentation - Monitor service health and troubleshoot production issues QUALIFICATIONS, SKILLS & EXPERIENCE - Experience developing backend services and APIs using .NET - Experience working with RESTful APIs and microservices architectures - Familiarity with Azure cloud services and cloud‑based integrations - Experience implementing authentication and authorization mechanisms - Working knowledge of Python for backend services or data processing - Understanding of backend testing practices and documentation standards - Ability to collaborate effectively with frontend and cross‑functional teams - Experience supporting production systems and resolving operational issues NICE TO HAVE - Experience supporting AI pipelines or data‑driven backend services - Familiarity with chat, ticketing, or workflow‑based systems - Exposure to event‑driven architectures or messaging systems - Experience working in SaaS or cloud‑native environments - Experience integrating Azure AI services such as Azure OpenAI or Azure AI Search into backend applications ABOUT ADASTRA Adastra is a global leader in AI and data-driven transformation, helping organizations lead with artificial intelligence—responsibly, strategically, and at scale. With over 25 years of experience, Adastra empowers enterprise clients to unlock business value through data innovation, operational excellence, and smart customer engagement. Trusted by some of the world’s most prominent brands, Adastra delivers end-to-end solutions grounded in thoughtful strategy, robust governance, and deep technical expertise. From defining vision to ensuring execution, Adastra guides organizations through every stage of their AI, data and cloud journey—building future-ready capabilities and delivering measurable, lasting impact. Adastra serves clients across key industries including financial services, automotive, manufacturing, technology, media and telecom (TMT), healthcare, retail, and professional services. The company employs more than 2,000 professionals across North America, Europe, and Asia. WHAT WE OFFER - Opportunity for advancement and career progression - Competitive compensation - Successful referral program - The opportunity to work with one of Canada’s 50 Best Managed Companies - Satisfaction of working for a reputable company - A flexible, dynamic, and diverse workplace EQUAL OPPORTUNITY EMPLOYER In our commitment to promote fair and equitable treatment of all employees and applicants, Adastra Corporation provides equal employment opportunities for all individuals regardless of age, sex, disability, race, ethnic origin, citizenship, creed, sexual orientation, marital status, or any other ground as described in the Ontario Human Rights Code. In addition, accommodation will be provided during the hiring process. Adastra Corporation’s implementation and support of employment initiatives, encourage diversified labour force participation and equal access to opportunities based on merit and performance. AI Usage - Our hiring process includes the use of AI-enabled tools to screen applications (e.g., keyword matching, qualification ranking). A human recruiter reviews all AI-generated shortlists to make informed hiring decisions. There has been an increased instance of fraudulent job offers coming from people posing as Adastra HR employees. Please note that Adastra will never request fees as part of our recruiting process and any emails sent to you that are not from ‘@adastragrp.com’ or ‘@talent.icims.com’ are fraudulent. All employment offers are sent via DocuSign and if you receive an employment offer from a suspicious email and not via DocuSign, it is fraudulent. Contact careers@adastragrp.com to inquire about jobs at Adastra, to report a suspicious request for money or personal information from external websites or suspicious employment offers.

Role Description This is a high-impact opportunity to build and scale backend systems powering a global digital platform at the forefront of financial innovation. In this role, you will design and develop robust, high-performance services that support real-time applications and large-scale user activity. You’ll work in a fast-paced, remote-first environment where autonomy, innovation, and technical excellence are highly valued. Your contributions will directly shape the reliability, scalability, and security of mission-critical systems. - Design, develop, and maintain scalable backend services using Node.js, ensuring high performance and reliability across critical systems. - Contribute to the architecture and implementation of microservices-based platforms supporting real-time applications and APIs. - Build and deploy new features and products using agile methodologies, ensuring seamless user experiences. - Optimize backend systems for scalability, low latency, and high availability as user demand grows. - Implement strong security practices across all backend components to safeguard systems and user data. - Collaborate with cross-functional teams to integrate databases, third-party services, and blockchain-related technologies. - Continuously improve system performance, code quality, and development processes through best practices and innovation. Qualifications - Strong expertise in Node.js and JavaScript, with experience building complex backend systems. - Solid understanding of microservices architecture and distributed systems. - Experience working with databases such as MySQL and MongoDB. - Proven ability to contribute to large-scale, high-availability platforms. - Good understanding of backend security principles and best practices. - Ability to quickly learn and adapt to new technologies in a fast-evolving environment. - Strong problem-solving skills, attention to detail, and ability to work independently in a remote setup. - Nice to have: experience with blockchain integrations, Redis or message queues, and languages such as Ruby, Rust, or C++. Benefits - Fully remote work environment with flexible working hours. - Competitive compensation package. - Opportunities for continuous learning, mentorship, and career growth. - Exposure to cutting-edge technologies and innovative projects. - Collaborative, global team culture with strong knowledge-sharing practices. - Regular team-building activities and social events (virtual and in-person). - High-impact role with the opportunity to shape next-generation digital platforms. Company Description