Senior Software Engineer (back-end)

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.

Responsibilities

• Design, develop, and maintain web applications across the full stack, collaborating closely with product owners, QA, and engineering peers
• Troubleshoot and resolve application and system issues, implementing fixes that address root causes rather than symptoms
• Participate in unit, integration, and user acceptance testing
• Document new features and changes to existing applications clearly and consistently
• Contribute to sprint ceremonies and team delivery in an Agile environment
• Stay current with emerging technologies and contribute ideas for continuous improvement

Qualifications

• 2+ years of experience in C#, with strong understanding of object-oriented principles (inheritance, interfaces, design patterns)
• Experience with front-end frameworks such as React, Angular, or Ember
• Experience with back-end frameworks and REST API development
• Familiarity with relational databases (SQL Server, MySQL, Oracle) and ability to write efficient queries
• Comfortable describing and reasoning about a full software stack
• Experience working in an Agile development environment

Live the Paychex Values

• Act with uncompromising integrity.
• Provide outstanding service and build trusted relationships.
• Drive innovation in our products and services and continually improve our processes.
• Work in partnership and support each other.
• Be personally accountable and deliver on commitments.
• Treat each other with respect and dignity.

What's in it for you?

• A flexible virtual-first work philosophy
• Generous paid time off
• 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
• Work-from-home allowance
• 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.

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.

Responsibilities

• Design, develop, and maintain web applications across the full stack, collaborating closely with product owners, QA, and engineering peers
• Troubleshoot and resolve application and system issues, implementing fixes that address root causes rather than symptoms
• Participate in unit, integration, and user acceptance testing
• Document new features and changes to existing applications clearly and consistently
• Contribute to sprint ceremonies and team delivery in an Agile environment
• Stay current with emerging technologies and contribute ideas for continuous improvement

Qualifications

• 2+ years of experience in C#, with strong understanding of object-oriented principles (inheritance, interfaces, design patterns)
• Experience with front-end frameworks such as React, Angular, or Ember
• Experience with back-end frameworks and REST API development
• Familiarity with relational databases (SQL Server, MySQL, Oracle) and ability to write efficient queries
• Comfortable describing and reasoning about a full software stack
• Experience working in an Agile development environment

Live the Paychex Values

• Act with uncompromising integrity.
• Provide outstanding service and build trusted relationships.
• Drive innovation in our products and services and continually improve our processes.
• Work in partnership and support each other.
• Be personally accountable and deliver on commitments.
• Treat each other with respect and dignity.

What's in it for you?

• A flexible virtual-first work philosophy
• Generous paid time off
• 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
• Work-from-home allowance
• 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 Us
Rho is the modern banking platform built for startups. Open accounts in minutes, issue cards, manage expenses, pay bills, and close the books – all in one connected platform backed by real human support.

Rho is building a modern finance platform that helps businesses manage banking, cards, expenses, bill pay, and accounting workflows in one connected platform.

We're looking for a Senior Software Engineer to help build and scale new financial products from ambiguous opportunity to production-grade systems. This role is for a product-minded backend engineer with strong technical judgment, deep customer curiosity, and the ability to drive complex initiatives across teams, stakeholders, and external partners.

This is a high-ownership role for an engineer who wants to build more than features. You'll help shape new product areas, bring complex financial workflows to life, work directly with cross-functional partners, and grow into broader technical leadership as Rho scales.

You'll work on critical financial workflows and platform capabilities that sit close to how businesses manage money. The work is technically challenging, customer-facing, and often involves regulated systems, operational complexity, and third-party integrations.

What You'll Do

• Own high-impact projects end-to-end, including our accounting integrations (NetSuite, QuickBooks, Sage Intacct, Xero, Puzzle) that keep customers' books accurate and up to date, from problem definition and technical design through launch, iteration, and operational ownership.
• Build reliable, scalable backend services that power core accounting and financial workflows, and help us expand into new adjacent product areas as the platform grows.
• Turn ambiguous product and business problems into simple, durable technical solutions.
• Develop a deep understanding of our customers' accounting and financial operations pain points, and use that context to make pragmatic product and engineering decisions.
• Partner closely with Product, Design, Operations, Compliance, and external partners, including accounting software providers and financial data platforms like Plaid and Finicity, to move complex initiatives forward.
• Make thoughtful technical tradeoffs, with a particular focus on shipping quickly without compromising the reliability of money movement.
• Raise the engineering bar through clear communication, strong system design, code quality, and mentorship.

What We're Looking For

• Senior-level experience building production backend systems, APIs, services, or distributed systems.
• Strong product judgment, customer curiosity, and comfort working through ambiguity.
• Experience owning projects end-to-end is a plus, but we also value engineers who've built deep expertise in complex systems without owning every stage of the lifecycle.
• Ability to manage multiple stakeholders and work cross-functionally with non-technical teams.
• Experience operating in fast-paced, high-growth environments where priorities evolve quickly.
• A bias toward shipping, learning from users, and continuously improving what you build.
• Experience with fintech, accounting systems, payroll, payments, banking, compliance-heavy products, or complex integrations is a plus.

Tech we use
Python, Go, GraphQL, PostgreSQL, Docker, Kubernetes, and GCP. Experience with this exact stack is helpful, but not required. We care more about strong engineering fundamentals, product ownership, and the ability to learn quickly.

What We Offer
Our people are our most valuable asset. Base salary may vary depending on relevant experience, skills, geographic location, and business needs.

Benefits

• Top-notch Private Healthcare Insurance for you and your family members
• Generous PTO policy
• Lunch at work
• Covered costs for parking for onsite staff
• Learning and development budget
• Paternity leave
• Hybrid work environment (with old town Belgrade office)

Diversity is a core value at Rho. We’re passionate about building and sustaining an inclusive and equitable environment for all those involved with our mission, including employees, contractors, candidates, customers and vendors. We believe every member of the Rho community enriches our ability to provide a broad range of ways to understand and engage with the market, identify problems, and drive solutions that align with our mission. We welcome all qualified applications and support each of our Rho’ers with ongoing professional growth opportunities.

The Apex Group was established in Bermuda in 2003 and is now one of the world’s largest fund administration and middle office solutions providers.

Our business is unique in its ability to reach globally, service locally and provide cross-jurisdictional services. With our clients at the heart of everything we do, our hard-working team has successfully delivered on an unprecedented growth and transformation journey, and we are now represented by over circa 13,000 employees across 112 offices worldwide.Your career with us should reflect your energy and passion.

That’s why, at Apex Group, we will do more than simply ‘empower’ you. We will work to supercharge your unique skills and experience.

Take the lead and we’ll give you the support you need to be at the top of your game. And we offer you the freedom to be a positive disrupter and turn big ideas into bold, industry-changing realities.

For our business, for clients, and for you

We’re looking for a talented and motivated Senior Specialist to play a key role in our dynamic team, collaborating closely with business stakeholders to deliver innovative technology solutions. You’ll be working on
eFront Invest
to drive efficiency and success in our global asset management operations.

Your Role:

• Work directly with business stakeholders to gather and understand requirements, designing customized solutions using eFront Invest.
• Configure and maintain eFront Invest’s modules and workflows to meet evolving business needs.
• Develop and enhance custom workflows, reports, and dashboards within eFront Invest using FrontScript.
• Integrate eFront Invest with other enterprise systems and data sources to streamline processes and enhance functionality.
• Troubleshoot, resolve, and optimize eFront Invest configurations and custom scripts to ensure high performance and reliability.
• Contribute to continuous improvement by following agile methodologies, including sprint planning and retrospectives.
• Provide technical training and guidance to team members.

Skills required:

• Hands-on experience with eFront Invest configuration, customization, and programming, particularly with FrontScript.
• In-depth knowledge of eFront Invest standard modules, including but not limited to, investment management, client reporting, accounting, and performance reporting.
• Expertise in designing and developing custom workflows, reports, and dashboards within eFront Invest.
• Experience working with FrontScript to automate processes, enhance existing functionality, and create custom integrations.
• Strong understanding of eFront Invest’s data model and the ability to tailor it to business requirements.
• Familiarity with eFront Invest’s integration points, including third-party applications and data sources, through APIs or custom-built solutions.
• Strong analytical and problem-solving skills, with a focus on detail and quality.
• Excellent communication skills, with the ability to translate complex technical solutions into clear business terms and engage effectively with business stakeholders.
• Domain knowledge in the Private Markets industry, including relevant business processes and technologies.
• Strong Leadership qualities and excellent team player.

Disclaimer: Unsolicited CVs sent to Apex (Talent Acquisition Team or Hiring Managers) by recruitment agencies will not be accepted for this position. Apex operates a direct sourcing model and where agency assistance is required, the Talent Acquisition team will engage directly with our exclusive recruitment partners.