AI-Driven Software Engineer: Modern & Legacy Systems

Nextlane; Sintra (Santa Maria e São Miguel, São Martinho e São Pedro de Penaferrim); Hybrid; EUR 55,000 - 85,000; Full time

Benefits offered by this job

Hybrid Work

Annual Payments

Meal Voucher

Vacation

Language Training

Private Medical Insurance

Teambuilding

Job summary

Nextlane is seeking a Mid/Senior Software Engineer to champion AI-driven development within a team that spans modern .NET stacks and legacy technologies like COBOL, Delphi, PowerBuilder, FoxPro, and WinDev. You will help shape architecture, build features, and modernize existing systems while mentoring others in AI-assisted practices.

You will collaborate with product, QA, and DevOps, write clean code, participate in reviews, and maintain AI agent workflows across the full development lifecycle.

Qualifications

• 4 to 6 years of professional software development experience.
• Proven hands-on experience with AI coding agents such as GitHub Copilot, Cursor or Claude Code.
• Experience building agentic workflows or custom AI tooling.
• Willingness to work with legacy technologies (COBOL, Delphi, PowerBuilder, FoxPro, WinDev).
• Fluent in English (mandatory).

Responsibilities

• AI Advocacy: lead by example using AI coding agents across development, testing, documentation and code review.
• Modern & Legacy Systems: develop and evolve applications from .NET to legacy tech, with AI-assisted analysis and modernization.
• Development & Quality: design, develop and maintain features; write clean, testable code; participate in code reviews and CI/CD.
• Collaboration: work with product, QA, DevOps and other teams; mentor engineers on AI-assisted practices.

Skills

AI coding agents

C# / .NET

React

TypeScript

JavaScript

Tools

GitHub Copilot

Cursor

Claude Code

Job description

Nextlane is seeking a Mid/Senior Software Engineer to champion AI-driven development within a team that spans modern .NET stacks and legacy technologies like COBOL, Delphi, PowerBuilder, FoxPro, and WinDev. You will help shape architecture, build features, and modernize existing systems while mentoring others in AI-assisted practices.

You will collaborate with product, QA, and DevOps, write clean code, participate in reviews, and maintain AI agent workflows across the full development lifecycle.