Retention numbers in the IT staff augmentation market are not normally discussed with this level of specificity. Most vendors describe themselves as “long-term partners” without naming a figure. Newxel names one: 98% retention across active engagements, with an average developer tenure of over three and a half years on client teams. That figure comes from Newxel’s own operational data across nine years and 500+ placed engineers, and it’s specific enough to be meaningful precisely because it’s verifiable.
This guide explains where that number comes from, what operational practices produce it, and what it should tell companies evaluating a dedicated software development team or IT staff augmentation engagement about how to evaluate vendors. Retention isn’t a marketing metric. It’s an operational output, and understanding what produces it changes what questions you ask during vendor evaluation.
Why retention is the metric that matters most in staff augmentation
The cost of replacing an engineer in a dedicated team or staff augmentation engagement is higher than most clients initially estimate. The visible cost is the sourcing and screening process: two to four weeks of vendor time, followed by client interview time. The less visible cost is the productivity gap: a new engineer joining an active codebase typically takes three to six months to reach the output level of the person they replaced, depending on codebase complexity, onboarding investment, and the engineer’s own ramp-up speed.
The product context that accumulates over years of work on a single codebase is genuinely difficult to transfer. Engineers who have worked on a product for three years carry architectural knowledge, decision history, and failure context that no onboarding document fully captures. When a high-tenure engineer leaves, the replacement cost is not just the recruiting fee and the ramp-up time. It’s the distributed knowledge that existed in that engineer’s head and is now partially unavailable to the team.
For companies running dedicated software development team engagements, high retention means something else that often goes unstated: it means the vendor’s HR and employment model is working well enough that engineers don’t want to leave. Retention is a signal about the quality of the working environment the vendor creates and maintains. An IT staff augmentation agency that can name a specific retention rate with a specific tenure figure has operational data. One that can only describe retention qualitatively either doesn’t measure it or doesn’t have numbers worth citing.
What actually produces retention in the staff augmentation model
Retention in an IT staff augmentation engagement comes from the intersection of three things: the vendor’s employment and HR infrastructure, the client’s day-to-day management quality, and the engineers’ sense of professional ownership over their work. All three matter. Only the first one is fully the vendor’s responsibility.
Compensation benchmarking
Compensation is the most straightforward driver of attrition and the one most frequently underestimated by vendors who treat it as a fixed cost rather than a retention investment. Engineering salaries in active hiring hubs, including Ukraine, Poland, Romania, and Bulgaria, have moved meaningfully over the past three to four years as demand from Western European and North American companies increased. Engineers who are compensated at 2021 market rates in a 2026 market are receiving a quiet signal that their growth isn’t being tracked.
Newxel’s HR function conducts annual compensation reviews benchmarked against current market rates in each hub. The output of those reviews is an adjustment conversation with the engineer, not just an internal memo. Engineers who receive regular, market-calibrated salary increases stay longer than those who have to ask for them or leave to get them. This is not a complex insight, but it’s one that many vendors in the IT staff augmentation company category systematically underinvest in.
Active HR support throughout the engagement
The HR layer in most IT resource augmentation services is heavier at the beginning and end of an engagement than in the middle. Contracts get drafted, onboarding happens, and then, unless an issue arises, HR contact drops to periodic check-ins or nothing at all. The problem with this pattern is that retention risk accumulates quietly in the middle of engagements, where subtle dissatisfaction with working conditions, unclear growth paths, or interpersonal friction builds until it produces a resignation.
Newxel’s HR approach is designed to intercept those signals before they become attrition events. Regular check-ins with engineers that are genuinely developmental rather than procedural, a clear escalation path when working environment issues arise, and proactive professional development conversations all contribute to a situation where an engineer who’s considering leaving is more likely to raise the issue than to quietly job-search. Not every retention risk is resolvable, but the ones that are resolvable have to be identified before the resignation arrives.
Professional development and growth path
Engineers who feel they’re growing professionally stay longer than those who feel they’re executing without learning. In a dedicated team or staff augmentation model, professional development is a shared responsibility between the vendor and the client. The vendor can provide access to learning resources, conduct skills-growth conversations, and flag when an engineer is ready for a more senior scope of responsibility. The client creates the conditions for that growth by giving engineers ownership over technical decisions, including them in architecture conversations, and treating their judgment as valuable rather than just their output.
Engagements where engineers are given genuine technical ownership, not just ticket execution, consistently produce longer tenures. This isn’t a correlation that requires sophisticated analysis; it reflects the straightforward fact that engineers who have interesting, meaningful work to do are less likely to look for it elsewhere.
Equipment, workspace, and working conditions
Working conditions are not glamorous to discuss in the context of retention, but they’re consistently cited in exit interviews as a contributing factor when attrition does occur. Engineers who are working with hardware that’s two generations old, in a workspace with unreliable connectivity, or on software licenses that are running out are accumulating frustration that compounds with other dissatisfiers.
Newxel’s services agreement covers equipment lifecycle management: hardware is refreshed on a regular cycle, connectivity is maintained, and software infrastructure is kept current. For remote engineers, the remote stipend and home-office infrastructure policy is documented rather than improvised. These are not differentiating features in the way that compensation or professional development are, but their absence is reliably noticed.
What the client’s management quality contributes to retention
The vendor can create excellent employment conditions and the engineer can still leave if the day-to-day working environment that the client creates is poor. This is the part of the retention equation that the vendor cannot control and that clients often underestimate their own influence over.
Engineers on dedicated software development team and staff augmentation engagements make their career decisions based primarily on the quality of their day-to-day experience: whether the code review culture is constructive, whether the roadmap is coherent, whether their architectural opinions are heard, and whether they feel like genuine contributors to the product rather than external contractors executing someone else’s decisions. The vendor’s HR infrastructure can’t compensate for a client engineering culture that treats remote or distributed engineers as a lower tier of the team.
The retention data from Newxel’s nine years of operation supports this: engagements where the client’s engineering leadership actively integrates the dedicated team into planning, architecture conversations, and technical decision-making consistently produce longer average tenures than those where the relationship is primarily transactional. This isn’t an argument for any specific management practice. It’s a description of what the data shows.
The practical implication is that clients evaluating IT staff augmentation services should think about what kind of working environment they’re creating for the engineers they’re about to hire, not just what the engineers’ technical qualifications are. A genuinely collaborative engineering culture is one of the most effective retention tools available, and it costs nothing to provide.
Retention by the numbers: what the comparison looks like
Putting Newxel’s retention figures in context requires care. Direct apples-to-apples comparison with other vendors is difficult because retention is not consistently defined or disclosed across the IT staff augmentation agency market. Some vendors measure retention from contract start; others from when the first at-risk event occurs. Some include short-term engagements in the calculation; others exclude them. The 98% figure Newxel reports is specific to long-term engagements and reflects the vendor’s operational history, not a marketing claim built on favorable data selection.
What is consistently reported in the broader technology labor market is that software engineer attrition is high in general. Annual voluntary turnover rates for software engineers at technology companies in Western markets have been reported at anywhere from 13% to 25% in various industry surveys, depending on company size, location, and the specific year. Against that baseline, a 98% retention rate across multi-year dedicated team engagements represents a genuinely different operational outcome, not just a marginal improvement.
The mechanism that produces this difference is the combination of active HR management, regular compensation benchmarking, and an employment structure that treats engineers as long-term colleagues rather than short-term resources. The contrast with staffing agency models, where the agency relationship ends at placement and the client assumes full management responsibility, is the structural explanation for why vendor-managed retention outperforms client-managed retention in most cases.
How retention figures should inform vendor evaluation
When evaluating staff augmentation services, the retention conversation is one of the most useful ones to have with prospective vendors, and one of the most frequently skipped. Here are the questions that produce useful signals.
What is your retention rate, and how do you measure it? A vendor who can answer this with a specific figure and a clear definition of what the figure covers has operational discipline around the metric. A vendor who describes retention qualitatively or deflects the question is unlikely to have the HR infrastructure that drives high retention in practice.
What is the average tenure of engineers on your longest-running client engagements? This question gets at whether the vendor’s retention claim is driven by a few stable long-term relationships or whether it represents a consistent pattern across the portfolio. Averages can be misleading if they’re pulled up by outliers. Ask about the distribution, not just the mean.
What does your HR function do between the start of an engagement and the annual review cycle? If the answer is primarily administrative, that’s a description of an IT staff augmentation agency that processes employment and doesn’t actively manage retention. If the answer includes specific practices around check-ins, development conversations, and proactive issue resolution, that’s a description of a vendor whose HR function is likely to produce the retention outcomes they claim.
How have you managed retention during periods of significant market disruption? This is the question that separates vendors who have operated through challenging periods from those who haven’t. The technology labor market in Eastern and Central Europe has changed significantly since 2022. Vendors who maintained their talent relationships, continued compensation benchmarking, and actively managed their engineering communities through that period have demonstrably stronger retention practices than those who reduced HR function during the disruption and have been rebuilding since.
IT staff augmentation vs. alternatives: what the retention comparison shows
The table below compares retention drivers across four common models for engaging external engineering talent: IT staff augmentation (sometimes marketed as outstaffing services), recruitment agency placement, project outsourcing, and freelance marketplaces. The comparison criteria in the first column represent the factors that most directly affect whether engineers stay for multi-year engagements.
| Retention driver | IT staff augmentation (Newxel model) | Recruitment agency (direct hire) | Project outsourcing | Freelance / contractor marketplace |
|---|---|---|---|---|
| Compensation benchmarking | Vendor-managed annually; market-calibrated in hub country | Client-managed; frequency and quality vary | Internal to vendor; client has no visibility | Contractor sets own rates; re-negotiated per contract |
| Active HR support during engagement | Ongoing throughout engagement; vendor HR team manages | None after placement | Internal to vendor; not accessible to client | None |
| Professional development infrastructure | Vendor provides access; client creates conditions for growth | Client’s responsibility entirely | Vendor manages; client has no influence | Contractor self-manages |
| Client’s ability to influence retention | High; day-to-day management quality directly affects tenure | High; client is the employer | Low; vendor manages the team internally | Moderate; depends on working relationship |
| Replacement process when engineer leaves | Vendor-managed; covered by services agreement and replacement guarantee | Separate recruitment engagement required; client pays again | Vendor-managed internally; client has no visibility | Client sources replacement independently |
| Typical tenure on long-term engagements | 3.5+ years at Newxel across active long-term engagements | Varies widely; client-dependent | Vendor-defined; often rotates engineers between projects | Short-term to medium-term; varies by contract |
| Who benefits from accumulated product knowledge | Client; engineers stay on the same product long-term | Client; engineer is directly employed | Vendor; product context stays with vendor’s team | Contract-dependent |
The row that often surprises clients in this comparison is the one about accumulated product knowledge. In a project outsourcing arrangement, the product context that develops over the engagement stays with the vendor’s team, not with the client. When the project ends or the contract changes, the client may have the deliverable but not the people who understand how it was built and why. In the staff augmentation model, that knowledge stays on the client’s dedicated team because the engineers have been working on the client’s product, in the client’s processes, for the duration of the engagement.
Common mistakes when evaluating IT staff augmentation companies
Five evaluation mistakes that predict poor retention outcomes
1. Taking retention claims at face value without defining the metric. “High retention” and “98% retention over three-and-a-half-year average tenures” are not equivalent claims. Before treating a vendor’s retention figure as meaningful, ask how it’s measured: what engagement length qualifies, whether short-term contracts are excluded, and whether the figure is auditable against the vendor’s actual engagement history. A specific, verifiable figure is evidence of operational discipline. A vague descriptor is not.
2. Selecting the IT staff augmentation agency with the lowest rate without evaluating HR infrastructure. The per-engineer rate is the most visible number in any vendor comparison. It’s also the one that correlates least reliably with retention outcomes. A vendor whose rate is 15% lower but whose HR function consists of a placement coordinator and an annual check-in call will produce higher attrition costs over a three-year engagement than a vendor whose rate is higher but whose HR team actively manages compensation, development, and retention throughout. The total cost of an engagement is the monthly rate plus the cost of replacements when engineers leave. Vendors with high retention reduce the second term to near zero.
3. Treating the hiring brief as the product of vendor evaluation rather than its prerequisite. Some companies enter the vendor evaluation process before they’ve written a hiring brief. This means they’re comparing vendors’ general capabilities rather than their specific ability to solve the client’s actual engineering staffing problem. A vendor who is asked to demonstrate their capabilities without a specific brief will present their best case for their best client profile, which may not be relevant to the client’s needs. Write the brief first. Then evaluate vendors against it.
4. Overlooking the client’s own contribution to attrition risk. The vendor’s HR and employment infrastructure is the foundation of retention. The client’s working culture and management quality is the structure built on top of it. Companies that evaluate vendors rigorously and then create a working environment where remote engineers feel like second-class contributors to the product are investing in a retention foundation they’re building on top of. The single most effective retention lever the client controls is genuine inclusion of the dedicated team in technical ownership and decision-making.
5. Not asking about replacement handling before signing the agreement. Every multi-year dedicated team or staff augmentation engagement will have at least one personnel event: an engineer moves on for personal reasons, a role evolves beyond a current team member’s skill set, or a fit issue emerges over time. How the vendor handles those events, and at whose cost, is documented in the services agreement. Clients who don’t understand those terms before signing discover them at the worst possible time. Ask for the replacement process in writing, with timelines and cost allocation specified, before the agreement is signed.
Hiring a dedicated software development team: what retention tells you about vendor quality
The dedicated development team services layer that produces retention is a compound outcome. It reflects compensation quality, HR function depth, working environment quality (as influenced by the client), and the vendor’s pipeline strength at replacement when attrition does occur. A vendor who can speak credibly about all four of these factors has operational depth. A vendor who can speak confidently only about the sourcing process is a staffing agency, not an IT staff augmentation company in the full sense of that term.
Companies that hire dedicated development team engineers through Newxel or any IT staff augmentation services provider are making a multi-year investment in a software development dedicated team that accumulates product knowledge over time. When Newxel describes a 98% retention rate with an average tenure of 3.5+ years, it’s describing the output of a specific operating model. The inputs to that output are: nine years of operating active HR functions across eight European hiring hubs, annual compensation benchmarking calibrated to hub market rates, professional development infrastructure for engineers, proactive issue identification before it becomes attrition, and account management that maintains the client relationship and the team relationship in parallel.
For companies hire dedicated development team engineers through an established IT staff augmentation services vendor, this model means something specific: the engineers they hire in month one are very likely to still be on the team in year three. That continuity compounds. The codebase context that accumulates over three years is not replaceable with a new hire. The working relationships between the dedicated team and the client’s internal team are not rebuilt without cost. Hire dedicated software development team engineers through a high-retention vendor and those assets are preserved. Hire through a low-retention vendor and the replacement cost is a recurring line item in the engagement’s true total cost.
What the 3.5-year average tenure actually means for product teams
Three and a half years is a long time in software product development. It’s long enough to have been on the team through at least one major architectural decision. Long enough to understand the parts of the codebase that were built under time pressure and carry technical debt. Long enough to know why the authentication system works the way it does, even if the decision that produced it predates the current engineering leadership.
That depth of institutional knowledge changes how the team operates. Engineers who have three years of context on a codebase make faster, more accurate decisions than engineers with three months. They know where the edge cases are. They know which third-party integrations are fragile. They know which parts of the codebase have been refactored twice and are still not right. They know the team’s unwritten standards as well as its written ones.
This is the value of retention that doesn’t show up in a monthly rate comparison. It shows up in sprint velocity, in bug rates, in the quality of technical decisions, and in the reduced management overhead of not having to re-establish context every time a team member changes. For companies deciding whether to hire a dedicated software development team in July 2026, the retention figure deserves more weight in the evaluation than it typically receives.
How to structure an IT staff augmentation engagement to support retention
Retention is jointly produced. Here are the practices on the client side that consistently correlate with longer engineer tenures in Newxel’s operational experience.
Include the dedicated team in sprint planning and architecture conversations from week one. Engineers who are present at the design stage develop ownership over the technical direction. Engineers who receive finished specifications and execute on them develop ownership over the ticket, not the product.
Make code review a genuine technical exchange, not a gatekeeping process. Code review that teaches is a professional development function. Code review that blocks and criticizes without explanation is an attrition risk. The culture of code review is one of the clearest signals engineers read about whether their engineering judgment is valued.
Treat time zone overlap as a shared responsibility. For dedicated teams in European hubs working with clients in Western Europe or North America, overlapping hours are a resource to be used deliberately, not a constraint to be complained about. When clients design their sprint structure to make the most of the overlapping window and build effective async practices for the rest of the day, the distributed working arrangement feels like a feature of the team rather than a limitation.
Conduct a genuine onboarding in weeks one and two. New engineers on augmented teams who receive a structured codebase introduction from a senior engineer on the client side reach independent velocity in six to eight weeks. Those who receive repository access and are left to figure it out independently take four to five months to reach the same point and are more likely to leave in that window, because the experience of being directionless is uncomfortable enough to accelerate a job search.
When compensation reviews arrive, advocate for engineers whose market rates have changed. Engineers who feel like the client’s management has their professional interests in mind stay longer than those who feel like the relationship is purely transactional. This doesn’t require any specific action beyond engaging honestly with the compensation benchmarking conversation when it comes around.
Frequently asked questions
What is Newxel’s developer retention rate?
Newxel reports a 98% retention rate across its long-term dedicated software development team and IT staff augmentation engagements, with an average developer tenure of 3.5+ years on client teams. This figure reflects active HR management, competitive compensation benchmarking, and a working environment that supports engineers professionally over multi-year engagements.
What is IT staff augmentation and how does it work?
IT staff augmentation is a model where a vendor sources, screens, and employs software engineers on behalf of a client company. The engineers work under the client’s direction, embedded in the client’s processes and reporting to the client’s engineering leadership. The vendor handles employment contracts, payroll, HR support, and local compliance. The client controls the engineering work entirely.
Why does developer retention matter for staff augmentation engagements?
Retention directly affects the total cost and productivity of a staff augmentation engagement. An engineer who leaves takes their codebase context with them. The replacement process, including sourcing, screening, interviewing, and the new engineer’s ramp-up period, typically costs several months of reduced productivity. High retention preserves the product context, codebase familiarity, and working relationships that take months to build.
What drives developer retention in the IT staff augmentation model?
The primary drivers are: compensation benchmarked regularly against current market rates in the hub, active HR support that addresses issues before they become attrition events, meaningful technical work that gives engineers genuine ownership, and a professionally supportive working environment. Client-side management quality also matters significantly: engineers who feel their work is visible and valued stay longer.
How is Newxel’s staff augmentation model different from a recruitment agency?
A recruitment agency places engineers into direct employment with the client and exits the relationship at placement. Newxel remains the Employer of Record throughout the engagement, managing payroll, HR, compliance, and retention for the duration. The client does not need a legal entity in the engineer’s country of residence. The vendor relationship is ongoing, not transactional.
What happens when an engineer on the augmented team decides to leave?
Newxel manages the replacement process, including sourcing and screening a replacement candidate through the same pipeline as the original hire. The services agreement includes a replacement guarantee with defined timelines. Newxel manages the employment transition and works to minimize disruption to the client’s sprint cadence during the handover period.
What hubs does Newxel operate in for IT staff augmentation?
Newxel operates eight European hiring hubs: Ukraine, Poland, Romania, Bulgaria, Turkey, Spain, Portugal, and Israel. Each hub has active hiring pipelines, Employer of Record infrastructure, and HR support in place. Clients can engage engineers from a single hub or build teams across multiple hubs depending on stack requirements, EU jurisdiction needs, and time zone preferences.
How long does it take to hire through Newxel’s staff augmentation services?
With a clear hiring brief, first candidate shortlists typically arrive within two to three weeks. A team of three to five engineers can be fully onboarded and operational within four to six weeks from a signed agreement. The timeline depends on how specifically the client defines the stack, seniority mix, and time zone requirements in the brief.
