September 26, 2026

Hire developers by tech stack: rates, vetting and interview guides

Hire developers by tech stack with dedicated rate, vetting and interview guides for backend, frontend, mobile, DevOps and fintech roles.

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HighCircl Editorial Team

18 min read

If you already know you need a senior Go engineer, or a React developer who can own a design system, generic hiring advice wastes your time. What you need when you hire developers by tech stack is a straight answer to three questions for that specific stack: what senior actually means there, what it costs in Europe and the US, and how you test for it before you make an offer. Each stack gets its own answer, because "senior" means something different in Go than it does in React.

This collection is for a CTO or hiring manager who has already scoped the role and just needs the specifics. Maybe you're deciding between a Python and a Node.js backend hire, or you're not sure whether a candidate who calls themselves a senior React developer actually is one. Each guide takes one stack and works through it in the same order: current rates in Europe and the US, the concrete signals that separate a senior engineer from a mid-level one in that stack, a hands-on vetting exercise you can run before a full interview loop, a set of interview questions built to catch candidates who talk well but haven't shipped, and a comparison of staff augmentation against a full-time hire for that role.

Backend coverage runs across Python, Django specifically, Node.js, Go, and TypeScript, since each has its own idea of what "senior" looks like and its own failure modes when you get the hire wrong. Frontend coverage centers on React, still the default choice for most product teams and still the stack where the gap between a portfolio project and a production codebase shows up fastest. Mobile gets the deepest treatment: iOS, Android, Flutter, React Native, Kotlin Multiplatform, and SwiftUI each have a dedicated guide, because mobile hiring mistakes are expensive to unwind once an app is in two app stores. DevOps gets its own guide, and fintech gets treated as a domain rather than a stack, because a fintech hire needs compliance and audit-trail instincts that don't show up in a normal technical screen.

Some of the hardest hiring mistakes happen before you write the job post, when you pick the wrong stack for the problem. That's why this collection also holds stack-decision guides: Flutter versus React Native, SwiftUI versus UIKit, Kotlin Multiplatform and Compose Multiplatform, and Flutter state management. Get the stack decision wrong and every hire downstream of it inherits the mistake. A team that picks React Native for a project that actually needs heavy native hardware access will spend the next year fighting the framework instead of the competition, no matter how good the engineer they hire is. Settle the stack decision first if it's still open, then move to the hiring guide for whichever stack you land on.

Every hiring guide by stack

FAQ

A general search filters on years of experience and a list of languages a candidate has touched. A stack-specific search filters on what that stack actually demands at a senior level: native module debugging for React Native, migration discipline for Django, or IAM and secrets hygiene for DevOps. Skip that filter and you'll interview candidates who look qualified on paper and can't answer the questions that matter for the job.

Should I always hire a specialist for the exact stack I'm using?

Not always. Strong engineers move between adjacent stacks faster than a job posting implies, and a senior backend engineer with deep Python experience can usually pick up Go competently within weeks. What doesn't transfer as easily is platform-specific depth: native mobile development, infrastructure automation, and anything touching compliance. Weigh how much of the job is language syntax against how much is platform-specific judgment before you decide how strict to be.

Does staff augmentation work the same way across every stack?

The staff augmentation decision runs on the same logic everywhere: it fits work that's real but not yet permanent, and it lets you bring in a senior engineer for a specific stack without committing to a full-time seat before you know the workload justifies one. What changes by stack is the compliance exposure. A DevOps or fintech hire typically touches production access, customer data, or audit requirements that a frontend hire doesn't, so the sourcing decision carries more weight in those stacks than in others.

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HighCircl Editorial Team

The HighCircl editorial team writes about hiring software engineers, nearshore development, and engineering team building. Our articles draw on direct experience sourcing and placing senior developers across Poland, Hungary, Slovakia, Serbia, Slovenia, Romania, and Spain — and on candid conversations with the CTOs and engineering leads who hire them.

HighCircl is a nearshore engineering network that delivers matched candidate shortlists in 72 hours. Every piece of content we publish is informed by real engagement data: actual developer rates, real hiring timelines, and what separates engineering teams that scale cleanly from those that stall.

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