---
title: 'Site Reliability Engineer (SRE) at Unlimit'
canonical: 'https://feeny.ai/job/site-reliability-engineer-sre-unlimit-belgrade-dw1kwzy75wga'
type: 'job'
last_seen: '2026-09-13'
---

# Site Reliability Engineer (SRE) at Unlimit

- **Company:** Unlimit
- **Location:** Belgrade, Serbia
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-02-05
- **Last confirmed live:** 2026-09-13
- **Apply:** https://jobs.lever.co/unlimit/06762db5-e016-4873-ab5b-28d6c081e807

## Job description

## About Unlimit

Unlimit is a global fintech ecosystem built to eliminate financial borders holding businesses back. The company provides the extensive infrastructure needed to scale globally, integrating payment processing, multi-currency business accounts, BaaS and crypto gateways into a single, intelligent platform.

Across 17 offices globally, Unlimit bridges hyper-local expertise with a high-capacity financial network, giving companies the agility to expand across regions with operational confidence and speed. Driving the evolution of payments, Unlimit is transforming its infrastructure from human-operated fintech into AI-native financial infrastructure — where APIs are consumed by machines, integrations are negotiated by agents, and systems evolve continuously through intelligent automation. Our next users are not only humans. They are AI agents acting on behalf of humans and businesses.

Unlimit serves more than the needs of businesses today; we are building the nervous system for a borderless global economy.

As a Site Reliability Engineer (SRE) at Unlimit, you will help ensure the reliability, scalability, and performance of our core platform and services. You’ll work closely with Engineering and other stakeholders to design, build, and operate cloud-based infrastructure and distributed systems—while continuously improving automation, observability, and incident response. This role blends Linux systems engineering, cloud infrastructure, Kubernetes, and automation with a strong focus on service availability, operational excellence, and continuous improvement.

## Key responsibilities

- Platform reliability & operations:
- Ensure the availability, resilience, and performance of the platform and supporting services.
- Own and improve incident management, including troubleshooting, escalation handling, and follow-ups aligned to SLAs.
- Participate in an on-call rotation, supporting production systems and driving reliability improvements from real incidents.
- Infrastructure engineering (Linux / Cloud / Kubernetes):
- Design, deploy, configure, and manage Linux-based system architecture across environments.
- Build and support platform implementations using AWS and other cloud technologies (compute-centric services and related infrastructure).
- Design and implement large and complex technology projects, from initial design through production rollout and operational handover.
- Support and maintain Kubernetes-based workloads and platform components.
- Automation & Infrastructure as Code:
- Build tooling and solutions to automate recurring operational tasks.
- Use Infrastructure as Code (IaC) to standardize and scale: Terraform for provisioning , Ansible for configuration management and automation
- Improve reliability by reducing manual steps and enabling repeatable deployments.
- CI/CD & developer enablement:
- Manage and maintain CI/CD pipelines across 20+ repositories spanning multiple technology stacks.
- Partner with Engineering teams to improve build/release consistency, pipeline reliability, and deployment safety.
- Observability & operational readiness:
- Implement and enhance monitoring, logging, and alerting, using tools such as: Prometheus, Grafana, Zabbix, Splunk, PagerDuty (or equivalent incident alerting/response tooling).
- Use metrics and incident learnings to reduce noise, improve signal, and shorten time-to-detect/time-to-recover.
- Documentation & standards:
- Produce clear, formal documentation including: Configuration standards, Troubleshooting runbooks, Infrastructure and architecture design documentation.
- Contribute to internal standards that improve consistency, security, and operational maturity.

Required skills & experience

- 5+ years of hands-on experience in Linux systems administration / engineering in production environments.
- Strong working knowledge of the following (or equivalents): Linux, Kubernetes, GitLab, Terraform, Ansible.
- Experience working in Agile (Scrum) teams.
- Experience with AWS (compute-focused services) and/or Google Cloud Platform.
- Proven experience with distributed systems design, maintenance, and troubleshooting.
- Strong scripting/coding ability in at least one of: Python, Golang, bash.
- Experience with observability and incident response tooling such as: Zabbix, Splunk, Prometheus, Grafana, PagerDuty.
- Strong communication skills in English, with the ability to work effectively with customers, vendors, partners, and internal teams across levels.
- Working knowledge (expected familiarity) with datastores and messaging systems such as: PostgreSQL, MongoDB, RabbitMQ. Also Web/application infrastructure components such as: Apache, Nginx
- Demonstrated ability to learn quickly, work independently, make good decisions, and collaborate as a team player in fast-changing environments.
- Strong AI-driven mindset and curiosity about emerging AI technologies.
- Hands-on experience using AI tools (e.g., LLMs, automation frameworks, AI-assisted development tools) to enhance productivity or system performance.

## Nice to have

- Experience operating highly available, high-volume web services.
- Strong initiative and self-starter attitude with minimal supervision.
- Demonstrated success reducing operational toil through automation and better tooling.
- Experience improving SLOs/SLIs, error budgets, or formal reliability practices (if applicable to your background).

Join Unlimit Team now!

Unlimit is an equal opportunity employer. We believe passionately that employing a diverse workforce is central to our success. We make recruiting decisions based on your experience and skills. We welcome applications from all members of society irrespective of age, sex, disability, sexual orientation, race, religion or belief.

## About Unlimit

## Company Overview
- **One-liner**: Unlimit provides a global payment infrastructure platform enabling businesses to accept and make payments in any currency across multiple regions.
- **Entity Type**: Private
- **Headquarters**: London, United Kingdom
- **Founded**: 2009
- **Founders**: Not publicly available

## Core Business
- Primary industry/industries: Fintech, Payment Processing, Financial Infrastructure
- Target customers: B2B; eCommerce brands, travel & hospitality companies, gaming platforms, subscription businesses, transportation & mobility companies, and entertainment businesses
- Mission or purpose statement: To eliminate financial borders for businesses all over the world

## Products & Services
- **Payment Processing**: Accept payments anywhere with access to over 1,000+ payment methods and 150+ currencies across 200+ locations; includes local licenses and APMs (Alternative Payment Methods), major card brand acceptance, and semi-automated KYC/AML.
- **Multicurrency Account**: A multipayment account for international transfers, card transfers, and local payment methods in 30+ currencies; includes corporate card issuance with customizable levels and limits, seamless FX conversion, and SEPA/SWIFT transfer channels.
- **Unlimit Crypto**: A fiat on-ramp and off-ramp for DeFi, GameFi, and NFTs; accepts global currencies via e-wallets, QR codes, cash, and instant bank transfers with customizable interfaces.
- **Unlimit Banking as a Service (BaaS)**: A configurable API platform offering white-label card issuing (physical and virtual), a single stackable API for financial operations, local and global payment rails (instant SEPA, SWIFT, BACS), and connections to major card brands and 1,000+ APMs.

## Market Standing
- **Valuation/Market Cap**: Not disclosed (private company)
- **Key Metric**: Total Funding — Not publicly available
- **Notable Investors/Partners**: Not publicly available
- **Growth Signals**: Presence on 4 continents with 17 modern offices worldwide; 1,000+ employees; over 200 locations covered; 15+ years of operational experience; actively hiring for roles across multiple regions including Hong Kong, San Francisco, Brazil, and Serbia

## Competitive Advantages
- Extensive global reach with local licenses and direct connections to alternative payment methods
- 15+ years of experience in the payment infrastructure space
- Comprehensive product suite covering payments, multicurrency accounts, crypto on/off-ramps, and BaaS
- Single, stackable API simplifies complex financial operations for clients
- Presence in high-growth markets across LATAM, APAC, Africa, EU, and the UK

## Strategic Focus
- Expanding global coverage and payment method availability (1,000+ methods)
- Deepening capabilities in crypto and digital asset on/off-ramp infrastructure
- Growing the Banking as a Service offering to enable white-label financial products
- Leveraging AI tools to optimize operations and hiring processes
- Continued investment in local licenses to reduce intermediaries for clients

## Why Work Here
- **Culture**: Values-driven culture based on “Take Initiative,” “Explore to Improve,” collaboration, and ownership; described as a melting pot of game-changing ideas with people from diverse paths speaking different languages [unlimit.com](https://www.unlimit.com/careers/)
- **Growth**: Opportunity to work on a constantly evolving business interface in the booming fintech industry; fast career progression within an international environment of top-notch professionals [unlimit.com](https://www.unlimit.com/careers/)
- **Team**: Multicultural team spanning 14 countries; described as a place where “Unlimiters are made, not born” and where people flourish within a unique culture
- **Work Model**: Mix of on-site, hybrid, and remote roles depending on location; open positions include on-site roles in San Francisco, hybrid roles in Hong Kong, and on-site roles in Belgrade and São Paulo [unlimit.com](https://www.unlimit.com/open-roles/)
- **Innovation**: Encourages taking part in creating innovative fintech products for disruptive industries; use of AI tools to support parts of the hiring process [jobs.lever.co](https://jobs.lever.co/unlimit)

## Sources
1. [unlimit.com](https://www.unlimit.com/)
2. [unlimit.com](https://www.unlimit.com/about-company/)
3. [unlimit.com](https://www.unlimit.com/careers/)
4. [jobs.lever.co](https://jobs.lever.co/unlimit)
5. [unlimit.com](https://www.unlimit.com/open-roles/)

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- [AMLCO](https://feeny.ai/job/amlco-unlimit-warsaw-z1xjsbp2bqkd) — Warsaw, Poland
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