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Offshore development center
Build and operate a full engineering hub in Poland, with recruitment, operations, HR, payroll, and retention managed for you.
Custom software development in Poland
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Since 2016
Building R&D teams
30+
R&D teams built
4 years
Median partnership
200+
Engineers working today
3-5 days
To first profile
5.0
Clutch rating
Trusted by leading companies
About
What is custom software development?
Custom software development means building software for one company's specific workflow instead of buying a ready-made product, so the code, the data model and the roadmap belong to that company.
Our practices come from what our teams build: security platforms, AI systems, software at global scale. Team leads meet regularly and bring real cases, so what one team learns reaches the others.
If you’re interested in the full R&D-center version, with recruitment, HR, payroll and legal inside one contract, explore our offshore development center services.
Comparison
How it compares to the alternatives
On The Spot Development | In-house hiring | Freelancers or a marketplace | A project outsourcing company | |
|---|---|---|---|---|
Time to first engineer | First profiles in 3 to 5 days | A full local hiring cycle | Days, quality unpredictable | Weeks, after a scoping phase |
Who controls the work | You: your sprints, your tools, you approve every hire | You | You, but attention is split across their clients | The company decides who works on it |
What you pay | Gross salary and a fixed fee, shown as separate lines | Salary, taxes, recruiting, office, equipment | An hourly rate with a platform margin | A blended rate |
Who owns the code | Yours, 100%, written into the contract | You | Depends on the contract, often unclear | Yours on delivery, per contract |
Scaling the team | Add engineers through the same pipeline, or move to a full dedicated team | Hire again from scratch | Find and vet each freelancer again | Renegotiate scope |
Risk on exit | Buyout right on any engineer from day one | None, they are your staff | They can leave mid-task | The team disperses when the scope ends |
Best when | The work continues past one release and you want the engineers inside your own team | You have a local pipeline and the budget to run hiring and HR yourself | A short, self-contained task with a clear finish line | A fixed scope you do not intend to own or extend |
On The Spot Development
In-house hiring
Freelancers or a marketplace
A project outsourcing company
Time to first engineer
First profiles in 3 to 5 days
A full local hiring cycle
Days, quality unpredictable
Weeks, after a scoping phase
Who controls the work
You: your sprints, your tools, you approve every hire
You
You, but attention is split across their clients
The company decides who works on it
What you pay
Gross salary and a fixed fee, shown as separate lines
Salary, taxes, recruiting, office, equipment
An hourly rate with a platform margin
A blended rate
Who owns the code
Yours, 100%, written into the contract
You
Depends on the contract, often unclear
Yours on delivery, per contract
Scaling the team
Add engineers through the same pipeline, or move to a full dedicated team
Hire again from scratch
Find and vet each freelancer again
Renegotiate scope
Risk on exit
Buyout right on any engineer from day one
None, they are your staff
They can leave mid-task
The team disperses when the scope ends
Best when
The work continues past one release and you want the engineers inside your own team
You have a local pipeline and the budget to run hiring and HR yourself
A short, self-contained task with a clear finish line
A fixed scope you do not intend to own or extend
When to use
Who this custom software development model is right for
01
Two or more engineering roles are open and your local market fills them slowly or expensively
02
The product is already live and the work continues after the current release
03
You want engineers inside your own sprints and code review, reporting to your managers
04
You need a skill your team does not have in-house: security, data, DevOps, or game engine work
05
You want the option to move those engineers onto your own payroll later
Why On The Spot Development
What you get that a fixed-scope vendor doesn't
You run the technical interview
We prescreen for skills, English and motivation, and share the screening call so you see a candidate before booking your own. Run the technical round yourself, or our CTO or a tech expert runs it to your criteria. You decide who joins.
One customer per engineer
Every engineer is 100% dedicated to your product, full time. No shared capacity, no engineer split across two roadmaps.
Salaries you can see
You see each engineer's gross salary and the On The Spot Development management fee as separate lines.
A cost you can rebuild yourself
Engineers are employed in Poland on EU contracts, with a working day that overlaps the EU fully and the US East Coast in the afternoon. You get a written cost breakdown per role before you commit.
We carry the operations
HR, benefits, payroll, legal, equipment, the office and account management sit with us. You carry product direction and priorities.
Buyout right from day one
If an engineer becomes core to your product, you can hire them into your own company. The right is in the contract from the first day, not unlocked at a milestone we choose.
Our experts
Software development roles we staff in Poland
Web engineers
Backend and frontend for products with real traffic: Python, Node.js, GoLang, C#, .NET, Ruby on Rails, React.
Mobile and game engineers
iOS and Android, React Native, Flutter, Xamarin, plus Unity3D 2D and 3D production.
AI engineers
LLM systems and retrieval pipelines, MLOps and data infrastructure. Python, Llama Index, PostgreSQL, GCP.
Data engineers
PostgreSQL, MongoDB, Kafka, Clickhouse, MySQL, for reporting that can be trusted.
DevOps and cloud
Docker, Terraform, AWS and GCP. Pipelines, infrastructure as code and the runbooks around them.
Security engineers
Our largest vertical: cloud, supply chain and email security, at seed to scale. QA and test automation run inside your sprint.
Tech stack
Technologies our engineers run in production
Backend
Python, Node.js, GoLang, C#, .NET and Ruby on Rails. In production behind cloud security scanning, software supply chain security, sports data at match-day peaks and fitness platforms.
Frontend
React, across three security products and one SaaS product, all of them already in front of paying customers.
Mobile
React Native, Flutter and Xamarin, for consumer apps and AI-first mobile products.
DevOps and Cloud
Total employment cost per senior engineer is materially lower than in the US or Israel at a comparable level, and you see how that cost is built.
Data and AI
PostgreSQL, MongoDB, Kafka, Clickhouse, MySQL and Llama Index. Analytics that stay honest at billions of events, and retrieval pipelines where every generated output needs a record of how it was produced.
Game and realtime
Unity3D with 2D and 3D production, plus automated and manual QA inside your sprint.
Industries & Domains
Industries we build software for
Cybersecurity
Agentless cloud scanning across infrastructure, operating systems, applications and data, without per-asset agents. Delivery pipeline security, and correlating SDLC events into contextual findings and automated remediation. Domain experience: Orca Security, Cycode.
AI and machine learning
Regulated document review where retrieval quality decides product quality long before model choice does, and every generated output needs an audit trail. AI-first consumer mobile apps. Domain experience: 44pixels.
Gaming and ad tech
Growth and monetisation at ad-network scale: analytics that stay honest at billions of events, personalisation where a latency regression is a revenue regression, and UX layers embedded into the mobile operating system and shipped through handset makers and carriers. Domain experience: Unity, Tripledot Studios.
Fintech
Trading platforms under multi-jurisdiction regulation, partner-facing CRM, onboarding and retention flows, and real-time monitoring of voice, chat and email for compliance teams.
Sports and media
Personalised live content at match-day traffic peaks: real-time scores and clips, per-user feeds, and notification delivery where late is the same as broken. Domain experience: 365Scores, Fisikal.
SaaS and marketplaces
Billing, contracts and customer communication in a single flow, in-app payments, and end-to-end synchronisation with an external system of record. Domain expertise: HoneyBook.
Success stories
Scaling a team for a sportstech platform
Expanding an engineering team for a global sports product
Under NDA
Dedicated team for a venture capital-funded startup
Building and supporting a 17+ team for a VC-backed startup in mobile AI
Under NDA
Offshore team for a clientflow management platform
Extending the R&D team behind a CRM and FinTech platform for small businesses
Under NDA
Dedicated team for a fintech & enterprise AI company
Building and growing an engineering team in Poland
Under NDA
Testimonials
OTS filled three senior backend roles in under three weeks. The candidates were technically sharp and a great cultural fit. Unlike other agencies, they actually understood our stack and asked the right questions. We were fully staffed before we expected to be.
Arie Teter
ex-CPO
We had been trying to hire an ML lead for six months. OTS delivered two strong, pre-vetted candidates in ten days. The technical screening saved us dozens of interview hours.
Dor Atias
Co-Founder & CPO
Every CV OTS sent was relevant. No noise, no keyword-matched filler. That alone made the process feel completely different from what we had experienced with generalist agencies.
Boaz Adato
Head of engineering guild
On The Spot Development has provided us with 15 developers, including server and automation engineers, who have been writing the core of 365Scores' engine. The team has delivered high-quality work, helping us reduce costs by 2X and speed up our development.
Ami Serkis
Co-Founder & CEO
Transparent Pricing
Custom software development pricing: what you pay
Engineering salary
Fixed management fee
Full visibility into total monthly cost per engineer from day one
Buyout option from day one to hire engineers directly into your company when needed
No hidden charges or unexpected cost increases over time
Our process
From request to first commit
Scope call
You tell us the roles, the stack, the seniority and where the gap is hurting. We come back with what those roles cost in Poland, how long each one takes to fill, and which of them we can move on first.
01
Shortlist in 3 to 5 days
We look at engineers we already work with and at the market: a database of more than 60,000 specialists and 200+ tech communities. You get real CVs with real salary numbers.
02
Prescreening
We check skills, English and motivation, and share the screening call so you see a candidate before booking your own.
03
Technical interview
Run it yourself, or our CTO or a tech expert runs it to your criteria. You decide who joins.
04
Offer and contract
We handle the offer, the Polish employment contract, IP assignment, equipment and the Warsaw office. Nothing waits on anything else.
05
Embedded in your team
06
The engineer joins your repositories and board, uses your tools and follows your processes. Payroll, benefits and HR stay with us.
Why Poland
Why Poland for custom software development
A market deep enough to hire from twice
Around 650,000 tech professionals, with roughly 57,000 STEM graduates entering the market each year. Our own database covers more than 60,000 of them.
EU law, not a new legal regime
GDPR, EU-level IP protection and employment contracts your counsel already recognises. No entity to register and no local HR function to build.
A working day that overlaps yours
CET gives a full working day with the UK and Europe and several hours with the US East Coast.
Cost structure
Total employment cost per senior engineer is materially lower than in the US or Israel at a comparable level, and you see how that cost is built.
Engineers who are not on job boards
We run TechSpot (our own event series in Warsaw), work with 200+ tech communities, and look through open Github-repositories. That is where the engineers who are not actively looking are.
Growth opportunities
Our engineering community
TechSpot
Tech events in Poland for everyone interested in software architecture and systems design. Like-minded people, top experts from leading companies, and a big engineering community.
137 Podcast
Related services
Explore our other services
FAQ
Frequently asked
questions
What is custom software development at On The Spot Development?
We provide the engineers who build your software. They are employed by us in Poland, work on your product only, inside your repositories and sprints, and report to you. We stay the legal employer and handle payroll, HR, legal and the Warsaw office.
Do you take fixed-scope projects with a fixed price?
No. We do not sell turnkey delivery against a fixed scope. We staff engineers into your team, or build and run a dedicated team for you. If you need a vendor to own a defined scope end to end and hand it over, a project outsourcing company is the right fit, and we will say so on the first call.
How fast can an engineer start?
We present the first profiles within 3 to 5 days of the scope call. Rare skill sets take longer, and we say so on the call.
What does it cost?
You pay each engineer's gross salary plus a fixed monthly On The Spot Development management fee, shown as separate lines with no bundling. There is no percentage margin on top of the salary. We build a breakdown for your specific roles and seniority levels before you commit.
Who owns the code we build?
You do, 100%. Every engineer's work product belongs to you, set out in the contract. The engineers work inside your repositories under your process, and Poland is GDPR-native, so EU data rules apply by default.
Can we hire the engineer into our own company?
Yes. A buyout right applies from day one. If an engineer becomes core to the product, you can convert them to your own headcount instead of losing the knowledge.
Do the engineers work only for us?
Yes. Every engineer is 100% dedicated to your product, full time, with no shared capacity. They keep your context between sprints instead of being rotated off to another account.
Can you scale the team up later?
Yes. The same sourcing engine adds engineers as the team grows. Past a certain size the question stops being about adding people and starts being about running a team, and that is what our offshore development center services cover, with recruitment, HR, payroll and legal inside one contract.
Where are the engineers based?
In our Warsaw office at Prosta 51. They are employed under Polish and EU law on the CET timezone, which overlaps the EU fully and the US East Coast in the afternoon.
What if we just want to hire directly, with no ongoing fee?
Then you want recruitment. Our tech recruitment services place engineers straight onto your payroll for a one-time fee, with no management fee afterwards, because they become your own employees.
Tell us which roles you need
One call, and you will know who we can staff, in what timeframe, and at what cost per engineer.
Thank you!
We've successfully received your request! Our specialists will contact you within 24 hours. For any urgent requests, please contact us directly at join@onthespotdev.com
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