---
title: 'Principal Back-End Engineer (Must: Kotlin & Spring Boot) at Santex'
canonical: 'https://feeny.ai/job/principal-back-end-engineer-must-kotlin-spring-boot-santex-argentina-peru-zm8hfhvvnxe3'
type: 'job'
last_seen: '2026-09-12'
---

# Principal Back-End Engineer (Must: Kotlin & Spring Boot) at Santex

- **Company:** Santex
- **Location:** Argentina / Peru / Mexico City, Mexico
- **Posted:** 2026-08-21
- **Last confirmed live:** 2026-09-12
- **Apply:** https://job-boards.greenhouse.io/santex/jobs/8733761002

## Job description

Santex is a global Certified B technology company as well as one of North America's fastest-growing companies, according to the Inc. 5000. It’s present in 18 countries and over 100 cities, and headquartered in Argentina with offices in the United States, Mexico, and Peru.

Its two service lines — AI Tech Consulting and AI-Optimized Engineering — help organizations comprehensively adopt technology, expand their capabilities, and improve business outcomes at scale.

The same approach defines its culture: Santex has 80.4% employee engagement (global average: 21%), 8% annual turnover (tech sector: 20–25%), 9,369 training hours invested in 2025 — more than double the global average —, and a 26.5% year-over-year reduction in carbon footprint, achieving carbon neutrality through offsetting.

Santex. A company with purpose and judgment. Yes, it's possible.

We are an Equal Opportunity Employer and are committed to fostering an inclusive and diverse workplace. We do not discriminate on the basis of race, color, religion, sex, gender identity or expression, sexual orientation, national origin, age, disability, veteran status, genetic information, or any other characteristic protected by applicable law. All qualified applicants will receive consideration for employment without regard to any of these factors. We strongly encourage candidates from all backgrounds to apply.

We’re hiring a Principal Kotlin/Spring Boot contractor to help own the execution backbone of a no-code workflow platform. This is not a simple CRUD service. The Orchestrator runtime is a multi-module system that receives workflow execution requests, persists durable state with Temporal, coordinates graph execution, integrates HTTP, agent, LLM, and human-review nodes, and safely executes increasingly AI-generated workflow graphs. You’ll join the squad responsible for the runtime layer that everything else depends on.

Responsibilities:

- Design and harden the Kotlin/Spring Boot runtime that executes workflow graphs reliably in production.
- Implement and improve Temporal.io workflows, activities, signals, queries, retries, and recovery paths.
- Strengthen contract-first APIs and shared contracts.
- Own failure-mode thinking across distributed execution retries, idempotency, partial failure, replay safety, pause/resume, and graceful degradation.
- Work across node types, including HTTP, agentic tool-calling, LLM, and human-in-the-loop review nodes.
- Improve integration coverage using Test containers and layered Docker Compose profiles.
- Collaborate closely with Composer and AI/KB teams on execution semantics and runtime behavior.
- Write clear operational documentation and runbooks for a reliability-critical service.

Qualifications:

- Strong production Kotlin backend experience.
- Strong Spring Boot experience in distributed systems or platform services.
- Hands-on Temporal experience in production.
- Strong understanding of workflow durability, retries, idempotency, and recovery design.
- Experience with multi-module Gradle codebases and contract-first API design.
- Experience with JPA/Hibernate and PostgreSQL.
- Experience with Docker Compose/Test containers integration testing.
- Comfort debugging multi-service systems with mixed Kotlin and Python components.
- Experience with observability tools like micrometer
- Experience with contract first development
- Advanced English is required for this position.

Strong Pluses:

- Experience with DAG/workflow/orchestration engines.
- Experience with AI/LLM/agent runtimes or other non-deterministic execution systems.
- Familiarity with FastAPI-based workers and cross-language integration.
- Experience with auth/token provider abstractions, OAuth2/JWT, or cached token acquisition.
- Experience writing operational docs, runbooks, and reliability guidance.

Location: Argentina / Mexico (CDMX or Guadalajara) / Peru

## About Santex

## Company Overview
- **One-liner**: Santex is a B-Corp certified global software services company that integrates people and technology to deliver AI-driven digital transformation and custom solutions for leading brands.
- **Entity Type**: Private (bootstrapped; no disclosed funding rounds)
- **Headquarters**: Carlsbad, California, United States
- **Founded**: 1999
- **Founders**: Juan Carlos Santiago (President & CEO)

## Core Business
- **Primary Industries**: Information Technology & Services, AI Consulting & Engineering, Software Development, Digital Transformation
- **Target Customers**: B2B – Enterprise and mid-market organizations across industries (Agriculture, Energy, Finance, Foodtech, Govtech, Healthcare, Sports & Entertainment)
- **Mission / Purpose**: “To positively impact individuals, organizations, and communities by collaborating to build a better future together.” [santexgroup.com](https://santexgroup.com/careers)

## Products & Services
- **AI Consulting & AI Engineering**: End-to-end advisory and implementation of AI solutions, including generative AI, machine learning, and computer vision.
- **STX Lab**: Internal innovation hub for AI experimentation, proofs of concept, and rapid prototyping. [santexgroup.com](https://santexgroup.com/careers)
- **Cybersecurity**: Security assessments, architecture, and compliance (including AI Security Training).
- **DevOps & Cloud**: Infrastructure automation, CI/CD pipelines, and cloud migration (Azure, GCP, AWS).
- **Product Design**: UX research, UI design, and product strategy.
- **Data & Analytics**: Data engineering, BI, and data science using tools like Snowflake, Databricks, and PyTorch.
- **BIM (Building Information Modeling)**: Specialized services for the construction and architecture sectors.
- **Industry Solutions**: Tailored offerings for Agriculture, Energy, Finance, Foodtech, Govtech, Healthcare, and Sports & Entertainment. [santexgroup.com](https://santexgroup.com/culture)

## Market Standing
- **Valuation / Market Cap**: Not publicly available (private company)
- **Key Metric**: Annual revenue of **$55M** (LinkedIn estimate); **Inc. 5000 honoree (2024)** with **164% 3-year growth** [inc.com](https://www.inc.com/profile/santex)
- **Notable Investors/Partners**: **NVIDIA** (partnership for AI upskilling and technology); also collaborates with **Hewlett Packard Enterprise**, **Mercado Libre**, and **Globant** as key talent/partner references. [linkedin.com](https://www.linkedin.com/company/santexgroup)
- **Growth Signals**:  
  - Headcount: 252 employees (+3% YoY, +16 people) [linkedin.com](https://www.linkedin.com/company/santexgroup)  
  - 21 countries of operation with offices in the US, Argentina, Peru, Mexico, Brazil, Spain, and more  
  - Monthly website traffic growth: +6.8% (monthly), +171.6% (yearly) [linkedin.com](https://www.linkedin.com/company/santexgroup)  
  - Active expansion into the US market (hiring a Senior Business Developer for the US) [santexgroup.com](https://santexgroup.com/careers)

## Competitive Advantages
- **B-Corp Certification**: Demonstrates commitment to social and environmental performance, transparency, and accountability.
- **People-Centric Culture**: Core values of Courage, Passion, Trust, and Participation drive high organizational performance alongside well-being. [santexgroup.com](https://santexgroup.com/careers)
- **AI Adoption & Reskilling**: 88% of employees completed specialized training, 74% actively engaged in upskilling programs, and 58% leverage advanced AI stacks to accelerate delivery. [santexgroup.com](https://santexgroup.com/culture)
- **Global & Multicultural Teams**: Presence in 16+ countries and 100+ cities, enabling nearshore and offshore delivery with diverse perspectives.
- **Inc. 5000 Recognition**: Ranked #3,039 in 2024 with 164% 3-year growth, indicating strong market traction.

## Strategic Focus
- **Reskilling and AI Integration**: The company is investing heavily in upskilling its workforce with AI coaches, NVIDIA partnerships, and internal hackathons to operationalize AI across all services. [santexgroup.com](https://santexgroup.com/culture)
- **US Market Expansion**: Hiring for a Senior Business Developer to grow the US client base and drive innovative technology solutions. [santexgroup.com](https://santexgroup.com/careers)
- **Sustainability & Purpose**: Committed to sustainable practices and aligning employee purpose with organizational goals (measuring personal purpose alignment since 2022).
- **Industry Vertical Specialization**: Deepening expertise in Agriculture, Healthcare, Govtech, and other regulated sectors through dedicated solutions.

## Why Work Here
- **Continuous Growth Culture**: 16 hours of dedicated training per person; access to AI coaches, hackathons, and mentoring programs. [santexgroup.com](https://santexgroup.com/culture)
- **Flexible Work Model**: Hybrid/remote-friendly with offices in the US, Argentina, Peru, Mexico, and more; global teams collaborate across time zones.
- **Diversity & Inclusion**: Active initiatives for women, LGBTIQ+ community, older adults, and neurodivergent individuals. “Building diversity, equity, and inclusion in our workplace and community is at the heart of creating a more transcendent Santex.” [santexgroup.com](https://santexgroup.com/careers)
- **Meaningful Work**: Purpose-driven projects with impact on real-world challenges across multiple industries; “people at the center” philosophy.
- **Wellness & Community Focus**: Emphasis on work-life balance, wellness programs, and a community worth living (core values: Participation, Trust, Passion, Courage).

## Sources
1. [santexgroup.com](https://santexgroup.com/) – Company website, services, culture, and careers page.
2. [linkedin.com](https://www.linkedin.com/company/santexgroup) – Company details, financials, workforce, tech stack, and recent news.
3. [inc.com](https://www.inc.com/profile/santex) – Inc. 5000 profile with growth data and founding year.
4. [santexgroup.com/culture](https://santexgroup.com/culture) – Reskilling strategy, AI adoption metrics, and culture highlights.

## Other roles at Santex

- [Technical Delivery Lead / Staff Architect](https://feeny.ai/job/technical-delivery-lead-staff-architect-santex-cordoba-b2ztc3brqfh0) — Córdoba, Argentina / Buenos Aires, Argentina
- [Delivery Manager LATAM](https://feeny.ai/job/delivery-manager-latam-santex-cordoba-jetnxh6bevgs) — Córdoba, Argentina / Buenos Aires, Argentina
- [Senior Product Owner](https://feeny.ai/job/senior-product-owner-santex-cordoba-ncx0739emmep) — Córdoba, Argentina
- [Principal Dev Tooling Engineer (Must: CLI & GO)](https://feeny.ai/job/principal-dev-tooling-engineer-must-cli-go-santex-argentina-peru-mexico-city-7wxtn3ncqjh9) — Argentina / Peru / Mexico City, Mexico
- [Principal Full-Stack Engineer (Must:React & Python)](https://feeny.ai/job/principal-full-stack-engineer-must-react-python-santex-argentina-peru-mexico-xk5g5pve886r) — Argentina / Peru / Mexico City, Mexico
- [Principal Software Architect (Must: Go, Kafka & AWS)](https://feeny.ai/job/principal-software-architect-must-go-kafka-aws-santex-argentina-qx7d39z7rm1c) — Argentina
- [Senior Account Executive for New Business](https://feeny.ai/job/senior-account-executive-for-new-business-santex-caba-sar1y8j2zx91) — Caba
- [Senior AI Specialist](https://feeny.ai/job/senior-ai-specialist-santex-cordoba-vps3wbpk9aaa) — Córdoba, Argentina / Buenos Aires, Argentina
- [Principal Software Architect (Must: React & Typescript)](https://feeny.ai/job/principal-software-architect-must-react-typescript-santex-argentina-pcnabkhxw2sp) — Argentina
- [Principal Full-Stack Developer (Must: Java & React)](https://feeny.ai/job/principal-full-stack-developer-must-java-react-santex-mexico-city-875zdrw9wmp7) — Mexico City, Mexico