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We design, build and operate custom platforms.

SigmaJunction is an engineering firm: we design, build and operate custom platforms, applied AI and business automation - the systems your business runs on. Senior teams only. Milestone billing, fixed estimates that hold, and equity terms when we believe enough to co-own the outcome.

  • Min project size
    Undisclosed
  • Hourly rate
    $50 - $99 / hr
  • Employees
    2 - 9
  • Year founded
    Founded 2025

Overview by:

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Strahinja Polovina

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Application Platforms
Amazon Application Development Framework
40%
Linux server
25%
Azure Platform
20%
AI Technologies & Models
Anthropic
40%
Open AI GPT-3
40%
Hugging Face Bloom
20%
Frameworks and CMS
.NET
10%
Django
5%
Programming & Scripting
Typescript
35%
Python
20%
Go
15%
C#
10%
Industries
Financial services
30%
Gambling
30%
Supply Chain, Logistics, and Transport
10%
eCommerce
10%
Information technology
5%
Legal
5%
Manufacturing
5%
Medical
5%
Clients
Small Business (<$10M)
60%
Midmarket ($10M - $1B)
35%
Enterprise (>$1B)
5%

Pricing Snapshot

Min. project size Undisclosed
Avg. hourly rate $50 - $99 /hr
Rating for cost 5 /5

Most Common Project Size

$10,000 - $49,999 based on 1 review
< $10,000 $10,000 - $49,999 $50,000 - $199,999 > $200,000

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Overall Review Rating

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SIGMAJUNCTION DOO Reviews

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API Development for Sports Betting Company

  • AI Development API Development DevOps Managed Services
  • Chatbots & Conversational AI Devops Assessment & Strategy Planning REST API
  • $10,000 to $49,999
  • May - Aug. 2026
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"They behaved like partners with a stake in the outcome rather than a supplier working through a scope."

Aug 9, 2026
Founder, Betkopro
Slobodan Lancos
Verified
  • Gambling
  • Subotica, Serbia
  • 1-10 Employees
  • Online Review
  • Verified

SIGMAJUNCTION DOO developed a sports betting company's technical foundation from scratch. They built an MCP server with 33 calculation tools, a B2B REST API, and a go-to-market infrastructure on Apollo.io.

Showing 1-1 of 1 Reviews

Our Story

SigmaJunction started with a simple observation: serious companies were paying serious money for software that didn't move a single business number. Strahinja founded the firm to do the opposite - engineering engagements that start with the metric, not the technology. Today Strahinja leads the firm the same way every engagement runs: hands-on, in the room for diagnoses and estimates, and accountable for the outcome. The commitments on this site - estimates that hold, first invoice after first d

Meet the Team

Strahinja Polovina

Strahinja PolovinaFounder

Strahinja Polovina is the founder of SigmaJunction, a hands-on engineering leader with 12+ years of experience building and scaling software, leading teams, and delivering production-ready solutions across Europe and the US.

What Sets Us Apart

Senior Engineers, End to End

Every engagement is led and delivered by senior engineers who can take a system from architecture to production and ongoing operation. No junior-heavy teams, unnecessary handoffs, or layers of account management.

Commercial Certainty

We work with fixed estimates and milestone billing. Clients pay as working software is delivered, and if we underestimate the effort, the overrun is ours—not theirs.

Aligned With the Outcome

Every engagement starts with the business result the system must create or save. For selected companies, we also offer equity or hybrid partnerships, aligning our incentives with the long-term outcome.

Contact SIGMAJUNCTION DOO

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Strahinja Polovina

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