Downloads of apps we shipped
Combined iOS + Android installs across our products.
Staff Augmentation
Hire Senior Developers
Hire senior developers only — no juniors padding the team, no learning on your codebase. For startups and SMBs that need engineers who make sound architecture calls, ship production code, and need direction, not training.
What You Get
A Product You Can Ship
01
Senior only, no juniors
Every developer we place has shipped production software and made real architecture decisions. You never pay senior rates for someone learning on the job.
02
Productive from week one
Senior engineers read a codebase, spot the risks, and start contributing immediately. No ramp-up period, no hand-holding, no supervision tax.
03
Judgement, not just code
Senior developers tell you when an approach will cause problems later. You get sound technical decisions, not just tickets closed.
§ 03MEASURED OUTCOMES
Results that
speak for themselves.
Seven years of shipping. Every number below comes from real products in-market — no vanity metrics.
Long-term or returning clients
Clients work with us 4+ years or come back for more.
Team with 5+ year tenure
A senior team built on retention, not churn.
In investment attracted
Capital raised by startups using products we built.
FIG. 03 — RESULTS SUMMARY, 2019–2026SOURCE: INTERNAL · AGGREGATED ACROSS 40+ ENGAGEMENTS
Our Approach
How We Vet for Seniority
Plenty of CVs claim senior. We test for the judgement and ownership that the title is supposed to mean — not just years on a timeline.
Real production track record
We verify that each engineer has shipped and maintained production systems under real load. Building something once in a tutorial isn't seniority.
Architecture and trade-off judgement
We assess how a developer reasons about scalability, debt, and trade-offs — the calls that distinguish a senior engineer from a fast coder.
Ownership and communication
Senior means owning outcomes and flagging risk early. We screen for engineers who raise problems before they become incidents, and who communicate clearly.
Direct access, no dilution
You work directly with the engineer through your own tools and process. No account manager in the middle diluting senior judgement into status updates.
Selected Work
Projects We've Shipped
§ REVIEWSCLIENT FEEDBACK
What our Clients Say
Every review is real and verifiable — straight from Clutch, Upwork, and LinkedIn. Nothing cherry-picked.
★★★★★
The quality for price is really high.
Prosperity is always happy to share their knowledge.
★★★★★
It feels like they're part of the team, and they make good decisions without needing a lot of support.
I presented Illia with a problem, he helped me think through of a way to solve the problem and best of all: him and his team were able to actually implement it! He's got great entrepreneurial instincts.
★★★★★
I think what sets them apart is the range of skills they bring to a project, as well as their level of knowledge.
★★★★★
From start to finish, the entire experience was nothing short of exceptional.
The team at Prosperity was super fast to respond to all our queries and requests. Their commitment to quality was evident in their extensive testing, ensuring a smooth and seamless integration of SSO into our apps.
★★★★★
The project was an enjoyable and positive experience.
I like the personal touch they have. They offer good bang for the buck.
★★★★★
When I ask Prosperity to do something that doesn't make sense, they suggest alternatives that work better.
★★★★★
They were honest, direct easy to communicate, had great quality and excellent value.
The build quality was very good overall and bugs were fixed quickly.
★★★★★
I'm really happy I chose to work with Illia to develop a face measurement taking iOS application.
He has been very communicative, got the work done on time, delivered a quality application, and was able to solve some technical challenges related to determining landmark points on ARKit-derived 3D model.
FM
Verified Upwork Client
CLIENT · ARKIT FACIAL MEASUREMENT APP
★★★★★
It was such a pleasure to work with Illia for the development of our App.
He is super experienced and has excellent work ethics. Illia delivered our project on time and never missed any milestones along the way. He is our number 1 developer to go to for any technical knowhow.
CA
Verified Upwork Client
CLIENT · CAMERA APP
★★★★★
Prosperity is an amazing team and provide excellent work.
I am looking forward to working with them again in the future. Total class act and very professional, plus excellent code.
CP
Verified Upwork Client
FOUNDER · CRUISE PLATFORM
★★★★★
Illia was fantastic to work with.
Understood requirements well, worked with me to brainstorm ways to achieve the functionality needed, tested and debugged, and delivered a crash-proof, pixel-perfect iPad application.
iP
Verified Upwork Client
CLIENT · IPAD ART INSTALLATION
★★★★★
Illia has done a really great job.
He's a strong communicator through and delivers high quality work. I can highly recommend him for future work. I will be hiring him again in future!
NA
Verified Upwork Client
CLIENT · NATIVE IOS APP
★★★★★
The team was a great help to us in this project!
The delivery and the workflow were very professional. The team went beyond the scope, they took more responsibility and provided us with the required expertise, although the project was complicated. We are happy to recommend this team!
AR
Verified Upwork Client
CLIENT · NFT APP WITH AR
★★★★★
Fast delivery, high code quality, and ability to communicate with the rest of the team.
PB
Verified Upwork Client
CLIENT · PYTHON BACKEND & REACT NATIVE APP
★★★★★
Illia and his team, delivered and completed the project on time.
They are highly professional, excellent communication skills and the entire project was completed smoothly without any issue along the way. We highly recommend them to anyone and have continued working with them on our ongoing projects and future work.
RF
Verified Upwork Client
CLIENT · REACT FRONTEND
★★★★★
The developer communicated well and delivered high-quality code, we already rehired him again.
RN
Verified Upwork Client
CLIENT · REACT NATIVE APP
★★★★★
Working with Prosperity has been a pleasure.
They will do everything possible make your project perfect.
iA
Verified Upwork Client
CLIENT · IOS APP
★★★★★
Illia helped us with frontend development in Swift.
His excellent technical skills are paired with very good communication skills, made it very easy for us to onboard him onto a running project and complete the work as planned.
SM
Verified Upwork Client
CLIENT · SWIFT MOBILE APP
★★★★★
We're impressed with their transparency and ability to solve very challenging technical problems.
★★★★★
The quality for price is really high.
Prosperity is always happy to share their knowledge.
★★★★★
It feels like they're part of the team, and they make good decisions without needing a lot of support.
I presented Illia with a problem, he helped me think through of a way to solve the problem and best of all: him and his team were able to actually implement it! He's got great entrepreneurial instincts.
★★★★★
I think what sets them apart is the range of skills they bring to a project, as well as their level of knowledge.
★★★★★
From start to finish, the entire experience was nothing short of exceptional.
The team at Prosperity was super fast to respond to all our queries and requests. Their commitment to quality was evident in their extensive testing, ensuring a smooth and seamless integration of SSO into our apps.
★★★★★
The project was an enjoyable and positive experience.
I like the personal touch they have. They offer good bang for the buck.
★★★★★
When I ask Prosperity to do something that doesn't make sense, they suggest alternatives that work better.
★★★★★
They were honest, direct easy to communicate, had great quality and excellent value.
The build quality was very good overall and bugs were fixed quickly.
★★★★★
I'm really happy I chose to work with Illia to develop a face measurement taking iOS application.
He has been very communicative, got the work done on time, delivered a quality application, and was able to solve some technical challenges related to determining landmark points on ARKit-derived 3D model.
FM
Verified Upwork Client
CLIENT · ARKIT FACIAL MEASUREMENT APP
★★★★★
It was such a pleasure to work with Illia for the development of our App.
He is super experienced and has excellent work ethics. Illia delivered our project on time and never missed any milestones along the way. He is our number 1 developer to go to for any technical knowhow.
CA
Verified Upwork Client
CLIENT · CAMERA APP
★★★★★
Prosperity is an amazing team and provide excellent work.
I am looking forward to working with them again in the future. Total class act and very professional, plus excellent code.
CP
Verified Upwork Client
FOUNDER · CRUISE PLATFORM
★★★★★
Illia was fantastic to work with.
Understood requirements well, worked with me to brainstorm ways to achieve the functionality needed, tested and debugged, and delivered a crash-proof, pixel-perfect iPad application.
iP
Verified Upwork Client
CLIENT · IPAD ART INSTALLATION
★★★★★
Illia has done a really great job.
He's a strong communicator through and delivers high quality work. I can highly recommend him for future work. I will be hiring him again in future!
NA
Verified Upwork Client
CLIENT · NATIVE IOS APP
★★★★★
The team was a great help to us in this project!
The delivery and the workflow were very professional. The team went beyond the scope, they took more responsibility and provided us with the required expertise, although the project was complicated. We are happy to recommend this team!
AR
Verified Upwork Client
CLIENT · NFT APP WITH AR
★★★★★
Fast delivery, high code quality, and ability to communicate with the rest of the team.
PB
Verified Upwork Client
CLIENT · PYTHON BACKEND & REACT NATIVE APP
★★★★★
Illia and his team, delivered and completed the project on time.
They are highly professional, excellent communication skills and the entire project was completed smoothly without any issue along the way. We highly recommend them to anyone and have continued working with them on our ongoing projects and future work.
RF
Verified Upwork Client
CLIENT · REACT FRONTEND
★★★★★
The developer communicated well and delivered high-quality code, we already rehired him again.
RN
Verified Upwork Client
CLIENT · REACT NATIVE APP
★★★★★
Working with Prosperity has been a pleasure.
They will do everything possible make your project perfect.
iA
Verified Upwork Client
CLIENT · IOS APP
★★★★★
Illia helped us with frontend development in Swift.
His excellent technical skills are paired with very good communication skills, made it very easy for us to onboard him onto a running project and complete the work as planned.
SM
Verified Upwork Client
CLIENT · SWIFT MOBILE APP
★★★★★
We're impressed with their transparency and ability to solve very challenging technical problems.
● HOVER TO PAUSEREAD ALL REVIEWS ON CLUTCH →
Mobile Apps Across Every Vertical
Deep domain knowledge across core verticals — so you get a team that understands your market, not just your code.
How It Works
From Brief to Senior Hire
01
Requirements Brief
We map your stack, the problem, and the level of seniority you need. You get a precise senior profile, not a generic shortlist.
02
Vetted Matching
Within 3–5 business days we present pre-vetted senior engineers. You interview directly and pressure-test the seniority yourself.
03
Onboarding
Access granted and environment configured. Senior engineers commit useful code and surface their first architecture observations in week one.
04
Ongoing Delivery
The engineer works inside your team and roadmap. We check in to confirm the seniority is delivering the judgement you're paying for.
01
Requirements Brief
We map your stack, the problem, and the level of seniority you need. You get a precise senior profile, not a generic shortlist.
02
Vetted Matching
Within 3–5 business days we present pre-vetted senior engineers. You interview directly and pressure-test the seniority yourself.
03
Onboarding
Access granted and environment configured. Senior engineers commit useful code and surface their first architecture observations in week one.
04
Ongoing Delivery
The engineer works inside your team and roadmap. We check in to confirm the seniority is delivering the judgement you're paying for.
Why Prosperity
Why Teams Choose Us to Hire Senior Developers
As a small senior agency that's shipped 40+ products, our whole model is built on senior engineers — it's who we are, not a premium tier.
Seniority is verified, not claimed
We test production track record and architecture judgement before placement. The title means something because we make it mean something.
Proven on demanding products
Our senior engineers have delivered for a major hearing-care group, European utilities, and complex security platforms — environments where weak engineering shows fast.
Honest about when you don't need senior
Senior engineers cost more, and not every task needs one. For well-defined, low-risk work, a mid-level developer is better value — and we'll tell you when that's the smarter spend.
No-lock-in, replacement guarantee
Rolling terms, and if a senior placement doesn't deliver within two weeks we replace them at no extra cost.
FAQ
Frequently Asked Questions
A senior developer has shipped and maintained production systems, makes sound architecture and trade-off decisions, and owns outcomes rather than just closing tickets. We verify this track record before placement — we don't take the CV's word for it.
§ 13 — Contact
Book a call.
Leave with a plan.
A direct line to the engineers who'll actually do the work. We'll map your problem to a scope and timeline in one short conversation.
Trusted & verified
Clutch★★★★★5.0 · 12 reviews
AgencyReviewVerified · Software AgenciesOr emailinfo@theprosperity.team