Lead Full-Stack Engineer (NestJS and React)

Posted 2 Days Ago
Be an Early Applicant
Hiring Remotely in Ukraine
Remote
Senior level
Information Technology • Consulting
The Role
Lead technical delivery for a quote-to-cash ERP/PSA platform. Design, develop, review, and architect TypeScript backend and frontend systems using NestJS and React. Analyze legacy codebases, identify technical risks, guide architecture, mentor engineers, and support Agile planning and delivery. Work with complex distributed systems, relational databases, APIs, Kafka, and Azure while contributing to roadmap planning, dependency management, and AI-assisted development adoption.
Summary Generated by Built In

About the project:

Our customer  is a full quote-to-cash ERP/PSA used by field service companies (system integrators) that install and maintain physical equipment - AV systems, security cameras, fire alarms, HVAC. The platform covers:

  • Sales: opportunities, quoting, ordering
  • Projects: project management, resource scheduling
  • Service: dispatch, ticketing, field technician management
  • Finance: accounting, GL, invoicing, purchasing (the financial core is central to everything)
  • Reporting: data sources, dashboards, report builder

All modules feed into a single financial core. The platform is sold as an all-or-nothing product today - no modular subscriptions.

You will work closely with stakeholders to analyze the current solution, identify technical risks, document findings, and provide recommendations that will shape future development. This is an excellent opportunity for an experienced engineer who enjoys solving complex technical challenges, investigating legacy systems, and making architectural decisions.

Requirements
  • 7+ years of commercial software engineering, with Backend and Frontend development using TypeScript
  • Hands-on experience with NestJS and React
  • Hands-on experience with REST API and GraphQL protocols
  • Proven track record leading engineering teams - technical mentorship, code reviews, architectural decisions.
  • Strong experience working with complex backend systems (beyond CMS platforms or simple websites). Experience with ERP systems is a significant advantage.
  • Solid understanding of distributed and microservices-based architectures.
  • Strong expertise with relational databases (MySQL, PostgreSQL, or similar), including schema design, query optimization, and performance analysis.
  • Experience working with stored procedures, database functions, and complex SQL is highly desirable.
  • Experience with Apache Kafka
  • Experience analyzing large legacy codebases and understanding complex business logic.
  • Hands-on experience with reverse engineering existing systems is a strong plus.
  • Experience participating in system design, architecture discussions, and technical decision-making.
  • Strong analytical mindset and excellent problem-solving skills.
  • Ability to work independently with limited project documentation.
  • Hands-on experience with Azure Cloud
  • Upper-Intermediate or higher English level.
  • Experience working in Agile / Scrum / Kanban
  • PHP and MSSQL stored procedures experience is a significant advantage.
Nice to Have
  • Experience with AI-assisted development tools (Copilot, Claude, Cursor)
  • Background in SaaS, multi-tenant platforms, or large-scale B2B portals
Responsibilities
  • Lead technical delivery, owning architecture and code quality
  • Design, develop, and review TypeScript code for backend and frontend systems
  • Align with Client engineering leadership on technical direction and delivery
  • Break down epics into technical tasks, drive estimation and sprint planning
  • Mentor engineers through pair programming, code reviews, and technical guidance
  • Drive AI adoption by onboarding teammates to AI tools and practices
  • Identify and unblock technical risks early; escalate delivery concerns proactively
  • Participate in Agile ceremonies and Client governance cadence
  • Contribute to Roadmap planning, risk identification, and dependency management

We offer*:

  • Flexible working format - remote, office-based or flexible
  • A competitive salary and good compensation package
  • Personalized career growth
  • Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
  • Active tech communities with regular knowledge sharing
  • Education reimbursement
  • Memorable anniversary presents
  • Corporate events and team buildings
  • Other location-specific benefits

*not applicable for freelancers

Skills Required

  • 7+ years of commercial software engineering experience
  • Backend and frontend development experience using TypeScript
  • Hands-on experience with NestJS and React
  • Hands-on experience with REST APIs and GraphQL
  • Experience leading engineering teams through mentorship, code reviews, and architectural decisions
  • Experience with complex backend systems
  • Experience with distributed and microservices-based architectures
  • Strong relational database experience, including schema design, query optimization, and performance analysis
  • Experience with Apache Kafka
  • Experience analyzing large legacy codebases and complex business logic
  • Experience participating in system design, architecture discussions, and technical decision-making
  • Hands-on experience with Azure Cloud
  • Upper-Intermediate or higher English proficiency
  • Experience working in Agile, Scrum, or Kanban environments
  • Experience with stored procedures, database functions, and complex SQL
  • Experience reverse engineering existing systems
  • PHP and Microsoft SQL Server stored procedures experience
  • Experience with AI-assisted development tools such as Copilot, Claude, or Cursor
  • Background in SaaS, multi-tenant platforms, or large-scale B2B portals
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The Company
HQ: Valletta
2,135 Employees
Year Founded: 2002

What We Do

N-iX is a global software solutions and engineering services company that helps world’s leading organizations turn challenges into lasting business value, operational efficiency, and revenue growth using advanced technology. Whether you need to build a custom solution, modernize your digital product or acquire extra tech expertise - we have the experience and capabilities to ensure your success. With over 2,000 professionals in 25 countries across Europe and the Americas, N-iX offers expert solutions in cloud, data analytics, embedded software, IoT, AI, machine learning, and other tech domains. Being in business for over two decades, we have worked with dozens of industry-leading enterprises and Fortune 500 companies creating value across a wide variety of sectors, including finance, manufacturing, supply chain, retail, e-commerce, healthcare, and more. Our unique combination of business domain expertise and technical know-how enables us to effectively collaborate with ISVs, tech companies, and enterprises of all sizes. Thanks to the strong tech ecosystem and partnerships with AWS, GCP, Microsoft, SAP, OpenText, Snowflake, and others, we bring extra speed, scale and efficiency to more than 160 organizations across the globe. N-iX is recognized by numerous industry awards, such as CRN Solution Provider 500, Global Outsourcing 100 by IAOP, ISG Provider Lens™, Modern Application Development services providers by Forrester, etc

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