Full Stack Senior Software Engineer with AI

We are 3PILLAR GLOBAL

Position within Costa Rica.

We build breakthrough software products that power digital businesses. We are an innovative product development partner whose solutions drive rapid revenue, market share, and customer growth for industry leaders in Software and SaaS, Media and publishing, information services, and retail.

Our key differentiator is our product mindset. Our development teams focus on building outcomes, and all of our team members around the globe are trained on the product mindset’s core values: – time to Value, Solve For Need, and Excel at Change. Our teams apply this mindset to build digital products that are customer-facing and revenue-generating. Our business-minded approach to agile development ensures that we align with client goals from the earliest conceptual stages through market launch and beyond.

Key Responsibilities

• Facilitate effective communication with client project stakeholders regarding project status and recommendations, using Kanban as a framework.
• Craft and maintain client code that is not just efficient but also performant, testable, scalable, secure, and of the highest quality.
• Actively participate in calls with clients (if needed).
• Promote client success across the team by collaborating with engineers, designers, and managers to understand user pain points, anticipate potential problems, and iterate on solutions that drive client success.
• Engage in Triage calls together with the customer team.
• Actively participate in the Engineering Practice community, mentoring others through Communities of Practice (CoPs) or on project teams and supporting the growth of technical capabilities.
• Independently drive project delivery within defined architecture, demonstrating autonomy and accountability in all stages from conceptualization to deployment.

Minimum Qualifications:

• A minimum of 5+ years of experience/expertise in the following areas specified below*:
• HTML, CSS, JavaScript, Typescript, NextJS
• Python, Fast API
• Postgres SQL
• RabbitMQ or Azure Service Bus
• Log aggregation systems such as Grafana Loki, Application Insights, Splunk, etc.
• Git/GitHub
• Experience with the following AI related skills and technologies:
• Collaborating with software engineers to embed AI in products
• Prompt Engineering
• Any of the following: Lang chain, Langgraph, Pytorch or TensorFlow
• Retrieval Augmented Generation with Qadrant, FAISS, Weaviate, or similar technologies
• Designing and implementing agentic AI workflows, including orchestration and tool integrations
• AI-enhanced development with Cursor, Copilot, Windsurf or similar tool Familiarity with fundamental concepts of LLMs, such as tokens, embeddings, hyperparameters, context windows.
• Experience in creating and implementing well-tested, scalable, and performant enterprise-level systems.
• Practice and initiative mentoring other engineers and decision-makers throughout the organization.
• Good understanding of SOLID principles.
• Proficiency in the English language.

Additional nice to have experience:

• Familiarity with OWASP
• Power shell scripting
• Working in the Cloud
• Containers using Docker/Kubernetes
• Reddis Experience with RAG using both semantic and lexical search techniques

Benefits

• Medical Insurance benefits as per company policy.
• Life Insurance as per company policy
• 12 days of paid vacation, sick leave and paid holidays as per local law
• Paternity and maternity leave as per as per local law
• Marriage, bereavement and graduation leaves as per company policy
• Sick leave and paid holidays as per local law
• Christmas bonus as per local law
• Saving Fund “Asociacion Solidarista”
• Beach house (Managed by the Asociacion Solidarista)
• Discounts in local shops
• Direct deposit of payroll.
• Paid professional certifications

What is it like working for 3Pillar Global?

• At 3Pillar, we offer a world of opportunity: Imagine a flexible work environment – whether it's the office, your home, or a blend of both. From interviews to onboarding, we embody a remote-first approach.
• You will be part of a global team, learning from top talent around the world and across cultures, speaking English every day. Our global workforce enables our team to leverage global resources to accomplish our work in efficient and effective teams.
• We’re big on your well-being – as a company, we spend a whole trimester in our annual cycle focused on wellbeing.
• Whether it is taking advantage of fitness offerings, mental health plans (country-dependent), or simply leveraging generous time off, we want all of our team members operating at their best.
• Our professional services model enables us to accelerate career growth and development opportunities - across projects, offerings, and industries. We are an equal opportunity employer.
• It goes without saying that we live by values like Intrinsic Dignity and Open Collaboration to create cutting-edge technology AND reinforce our commitment to diversity - globally and locally.
• Join us and be a part of a global tech community! 🌍💼 Check out our Linkedin site and Careers page to learn more about what it’s like to be part of our #oneteam!