Paychex
Posted 2d ago

Principal Software Engineer (Full-Stack Python)

Paychex
Belgrade, Central Serbia, Serbia
HybridFull Time
Responsibilities
  • leading architecture
  • mentoring engineers
  • championing DevOps
Requirements
  • Requires 8+ years of software development experience
  • Python
  • AWS Lambda
  • JavaScript/TypeScript, React
  • GraphQL
  • Distributed systems
  • DevOps, CI/CD
  • Observability
  • Testing, and technical leadership
Technical tools mentioned
PythonAWS LambdaJavaScriptTypeScriptReactGraphQLCircleCIGitHub ActionsDatadogAI-powered tools

Job description

Paychex is reimagining how businesses manage their workforce by bringing payroll, HR, benefits, and advisory services together into a single connected HCM platform. As Paychex and Paycor come together, we're combining innovative technology, data-driven insights, AI, and human expertise to help organizations work smarter, support their people, and achieve better business outcomes. This is an exciting time to join our team as we continue to invest in innovation, simplify client experiences, and shape the future of work. At Paychex, you'll have the opportunity to grow your career, make a meaningful impact, and be part of something bigger as One Paychex.
Overview

As a Principal Software Engineer, you will provide strategic partnership across teams, driving the architecture, design, and delivery of scalable software solutions. You will partner with Product and Engineering teams to solve complex business challenges, mentor engineers at all levels, and help shape the technical direction of the organization.


Responsibilities

  • Lead the architecture and design of large-scale software initiatives.
  • Drive technical alignment and influence engineering strategy across teams.
  • Mentor engineers and promote best practices, standards, and design patterns.
  • Lead code reviews and drive continuous improvement in software quality.
  • Partner with cross-functional stakeholders to deliver business value and remove technical roadblocks.
  • Communicate regularly with the Product Management team to ensure you have a solid understanding of the product map.
  • Responsible for ensuring effective integration of software across products, platforms and environments
  • Champion DevOps practices across teams — CI/CD automation (CircleCI, GitHub Actions), infrastructure as code, observability, and release safety
  • Lead the resolution process for technical issues
  • Make changes to prevent recurrence, modifying existing code and faulty files, writing and running special programs

Qualifications

  • 8+ years of hands-on experience in full lifecycle software development.
  • Strong knowledge of software engineering best practices, design patterns, and development methodologies.
  • Strong experience with Python, including building serverless microservices on AWS (Lambda).
  • Strong experience with JavaScript/TypeScript, React, and GraphQL APIs.
  • Experience building and supporting distributed, event-driven systems, including integrations with third-party services and designing for resilience and failure recovery.
  • Strong sense of production ownership and DevOps practices, including CI/CD (CircleCI, GitHub Actions), deployment, observability and monitoring (Datadog or equivalent), incident management, and operational support.
  • Solid testing and verification mindset, with a focus on delivering reliable, high-quality software in environments where accuracy and correctness are critical.
  • Experience using AI-powered tools
  • Proven ability to drive technical excellence, influence change, and support cross-team initiatives.
  • Ability to communicate technical concepts effectively to both technical and non-technical stakeholders.
  • Excellent collaboration, leadership, and problem-solving skills.

What's in it for you?

  • A flexible work philosophy
  • Company paid private health insurance
  • Company paid life and disability insurance
  • Paid leave for illness, birth parents, non-birth parents, elder caregivers, marriage, adoption of a child and bereavement
  • Inclusive and accessible Employee Assistance Program (EAP) to help with everyday challenges
  • Christmas and Easter bonuses
  • Opportunity for strengthening expertise and skills through Paychex’s learning platform, including lessons in English

Not sure if you meet every requirement?

At Paychex, we know that great talent comes in many forms. If you're passionate about the role but don't check every box, we still encourage you to apply. You might be the right fit - either for this position or another opportunity with us.


Paychex is an equal opportunity employer. We are committed to fostering a respectful and inclusive workplace where all individuals are treated fairly and evaluated based on their qualifications, experience, and merit. We comply with all applicable federal, state, and local laws prohibiting discrimination in employment.

About Paychex

Provider of integrated payroll, HR, and benefits outsourcing solutions.

Similar jobs

Software Engineer roles near Belgrade, Central Serbia
15h
Save
Mark Applied
Hide
Senior Software Engineer (Endpoint Products)
Belgrade, Central Serbia, Serbia
HybridFull Time
HYPR
HYPR: Sells phishing-resistant passwordless authentication and identity verification software.
10+ YOE10+ years of Windows or macOS software development; expert C/C++, C#, and Objective-C; OS internals, debugging, REST, HTTP/HTTPS, TCP sockets, cryptography, Git-Flow, and enterprise authentication experience.
C, C++, C#, Objective-C, RESTful APIs, HTTP, HTTPS, TCP, Git-Flow, Jenkins, Artifactory, JIRA, Microsoft .NET, WPF, Microsoft Active Directory, Win32 APIs, Microsoft Visual Studio, WinDbg, WiX, NUnit, CryptoTokenKit, PAM, XPC, Zoom
2d
Save
Mark Applied
Hide
Principal Software Engineer (Full-Stack Python)
Belgrade, Central Serbia, Serbia
OnsiteFull Time
Paychex
PaychexNASDAQ: PAYX: Provides payroll, human resources, and benefits management software.
8+ YOE8+ years in full-lifecycle software development; expertise in Python, AWS Lambda, JavaScript/TypeScript, React, GraphQL, distributed systems, CI/CD, observability, testing, and technical leadership.
Python, AWS, AWS Lambda, JavaScript, TypeScript, React, GraphQL, CircleCI, GitHub Actions, Datadog, DevOps, CI/CD, AI
3d
Save
Mark Applied
Hide
AI-Native Software Developer
Belgrade, Vojvodina, Serbia
RemoteFull Time
OnTheGoSystems
OnTheGoSystems: Develops multilingual plugins and SaaS tools for WordPress websites.
Experience with Ruby on Rails or other back-end frameworks, advanced SQL skills, software testing habits, and hands-on experience using AI for end-to-end software development.
Ruby on Rails, SQL, AI
4d
Save
Mark Applied
Hide
Senior Software Engineer - C Programmer
Novi Sad, Vojvodina, Serbia
HybridFull Time
Fivetran
Fivetran: Automates data movement into cloud data warehouses.
Experienced software engineer with C development expertise, strong systems design skills, and experience with cloud services, network protocols, serialization, relational databases, and software performance.
C, Python, Postgres, Oracle, SQL Server, make, GitHub Copilot, Claude Code, Jenkins, GCP, Azure, AWS, macOS, Linux, Unix, Windows, git, AWS CloudFormation, Kubernetes, Docker
1w
Save
Mark Applied
Hide
Sr Software Engineer - Embedded Linux
Novi Beograd, Belgrade, Serbia
HybridFull Time
Resideo
ResideoNYSE: REZI: Manufacturing and distributing home comfort and security solutions.
5+ YOERequires 5+ years of embedded software experience, Embedded Linux, C/C++, Yocto or Buildroot, bootloaders, kernels, device drivers, Git, Python or Bash, and English communication. Bachelor's degree preferred.
Embedded Linux, C, C++, Yocto, Buildroot, Git, Python, Bash, GitHub Copilot, Claude Code, CI/CD
1w
Save
Mark Applied
Hide
Software Engineer 3 - Inference
Vancouver or San Jose or Durham or Mexico City or Bangalore or Pune or Hoofddorp or Belgrade or Barcelona or Singapore or Sydney or Tokyo
$132k-$198k/yr HybridFull Time
Nutanix
NutanixNASDAQ: NTNX: Sells cloud software and hyperconverged infrastructure for enterprises.
4+ YOERequires 4–7 years developing resilient software, strong algorithms, Docker, Kubernetes, Go, Python, CI/CD, distributed systems, datacenter architecture, and a computer science bachelor's or master's degree.
Kubernetes, Docker, Go, Python, TensorFlow, PyTorch, CI/CD, GPU
1w
Save
Mark Applied
Hide
Software Engineer 2 - PowerBI
Belgrade, Belgrade, Serbia
HybridFull Time
Microsoft
MicrosoftNASDAQ: MSFT: Develops software, services, devices, and cloud computing solutions.
Bachelor's degree or equivalent experience, few years of engineering experience coding in C/C++/C#/Java/JavaScript/Python; experience building services, SDKs, CI/CD, Azure and Power BI integrations; ability to pass Microsoft security screening.
TypeScript, Angular, Node.js, C#, .NET, PowerShell, Azure, Microsoft Fabric, Power BI, App Service, Blob Storage, Azure Front Door, Traffic Manager, Key Vault, Azure DevOps, GitHub, OneBranch, EV2
1w
Save
Mark Applied
Hide
Software Eng (Dev) III
Belgrade, Central Serbia, Serbia
OnsiteFull Time
International Game Technology
International Game Technology: Global provider of gaming, digital entertainment, and fintech solutions.
Proficient in C# and OOP, experience with Unity, able to work independently; event-driven and 2D/3D graphics experience is a plus.
C#, Unity