Open for selected freelance and collaborationSoftware engineer for operational systems

I’m AlfreinscoSoftware Engineer

I help institutions and local businesses build, extend, and stabilize operational software—web systems, APIs, admin workflows, mobile apps, and production delivery.

What you can hire me for: features, fixes, integrations, internal tools, and end-to-end systems

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Ambon, Maluku, Indonesia
Professional portrait of Marthin Alfreinsco Salakory
9+

live systems documented

2025→

Programmer at Universitas Pattimura

End to End

workflow → production handoff

01 / The engineer

Ambon, Maluku, Indonesia

Digital systems designed to align with your business workflow.

I’m Marthin Alfreinsco Salakory, a software engineer from Ambon, Indonesia. I help institutions, organizations, and local businesses simplify operations through web systems, mobile apps, and APIs shaped around how their teams actually work.

I stay involved from workflow clarity through production delivery—so the result is understandable for users, maintainable for operators, and ready for long-term ownership.

“Technology should simplify the work—not add another layer of confusion.

02 / Why work with me

I understand the system behind the interface—not just the code on screen.

You work with an engineer who can translate complex operations into connected, secure, and maintainable products—from identity and payments to the complete delivery flow.

01

Proven identity experience

Choose an engineer who has built a connected SSO ecosystem.

I do not treat login as a standalone feature. Across Universitas Pattimura systems, I connect web, mobile, LDAP, Google, permissions, and campus applications through one controlled identity architecture.

  • Experienced with real institutional complexity
  • Security and access designed from the start
  • One architecture for web and mobile growth
What you gain

You get a consistent identity foundation without rebuilding access for every application.

Web userBrowser access
Mobile userApplication access
SSO Universitas PattimuraIdentity and access control
LDAPDirectory identity
GoogleConnected identity
Access policyRoles and permissions
Campus applicationsControlled services
02

Transaction-ready engineering

Choose someone who understands money flows, not only payment screens.

I build the complete transaction path between operational systems, finance, banks, payment gateways, and Midtrans—including callbacks, status integrity, and reconciliation.

  • Understands business and technical transaction flow
  • Designs for failure, retries, and verification
  • Keeps every payment status traceable
What you gain

You reduce transaction ambiguity and gain a payment flow the team can verify.

Campus applicationCreates a transaction
Financial systemReference and reconciliation
Payment gatewayRoutes payment requests
Bank channelInstitutional banking
MidtransPayment processing
Other channelsExtensible integration
Verified statusCallback and notification
03

Solution-first process

Choose a partner who solves the right problem before writing code.

Before choosing technology, I translate the problem, actors, data, decisions, and exceptions into a model stakeholders can understand and validate together.

  • Asks why before deciding how
  • Makes complex workflows understandable
  • Validates direction before costly development
What you gain

You invest in a solution grounded in real work—not assumptions or unnecessary features.

Real problemObserved workflow
Actors and processWho does what
Data and rulesStates and decisions
Solution modelValidated relationship
Build and integrateApplication and services
Validate with usersTest real cases
Production and feedbackOperate and improve

03 / How I can help

Buyable work for teams with a concrete operational problem.

Not a vague skill list—clear engagement types for institutions, organizations, and local businesses.

01

Operational system development

Build or extend information systems, admin platforms, portals, and workflow tools around real roles and records.

New modulesAdmin workflowsRole-based accessLaravel / React
02

API, data & integrations

Design REST APIs, relational models, authentication flows, and connections between operational systems.

REST APIsAuthIntegrationsMySQL / PostgreSQL
03

Stabilization & production delivery

Fix fragile flows, harden deployment, and hand over systems that operators can run without tribal knowledge.

Bug fixesLinux / NginxHandoff docsMobile support

04 / Selected work

Live systems for universities, organizations, villages, and local businesses.

Each case study documents context, problem, technical decisions, and verifiable outcomes—not just a screenshot gallery.

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Low-risk start

Start with a small, scoped engagement.

A practical first step to reduce risk, understand the codebase or workflow, and establish a clear working rhythm—before a larger build.

Best for a clearly defined issue in an existing system

Bug fix / stabilization

  • Issue diagnosis and root-cause summary
  • Targeted code fix with basic regression checks
  • Notes on what changed and what to watch
Discuss on WhatsApp

Best before committing to a larger development project

Workflow / codebase review

  • Process and architecture findings
  • Risks around data, auth, and maintainability
  • Prioritized recommendations and next steps
Discuss on WhatsApp

Best for one module, workflow, or external connection

Scoped feature or integration

  • Clear deliverables and exclusions
  • Implementation with validation and error handling
  • Handoff notes for operators or the next developer
Discuss on WhatsApp

05 / Professional experience

Documented roles across software and IT operations.

Roles are labelled by their documented engagement type. Institutional projects are presented separately from formal employment.

EmploymentJanuary 2025 — Present

Programmer

Universitas Pattimura · Ambon, Maluku, Indonesia

Develops and maintains operational software supporting university workflows across web systems and related services.

Contributes end-to-end implementation for institutional platforms that organize cooperation, admissions, repositories, business units, and related operational information.

Technology

PHPLaravelRelational DatabaseWeb Applications
Related project: PMB Seleksi Mandiri UNPATTI
View complete experience

How I work

A clear path from problem to production handoff.

Selected freelance and collaboration work starts with operational clarity—not a vague feature list.

01

Clarify the workflow

We define users, records, decisions, constraints, and what “done” means for the organization.

02

Shape the system

I propose structure, stack, and delivery scope that fit the process—not the other way around.

03

Build and validate

Implementation moves in reviewable steps with working flows your team can test against real cases.

04

Ship and hand over

Production deployment, documentation, and ownership notes so the system remains operable after launch.

Engineering notes

Practical writing from operational software work.

Notes on identity integration, workflow modeling, status lifecycles, and maintainable delivery—written from shipped systems.

Browse all notes

Have an operational system to build?

Tell me the workflow. I’ll help define the system.

Best fit: institutional platforms, internal tools, public portals, APIs, and mobile support where the operational problem is concrete.

Ideal clients

  • Universities, organizations, and local businesses with a clear operational process
  • Teams that need maintainable systems—not throwaway prototypes
  • Projects ready for discovery, implementation, and production handoff

Send these in your first message

  1. Who will use the system, and what do they need to finish?
  2. Which records or documents matter most?
  3. What is broken or slow in the current process?
  4. Target timeline and any hard constraints
Start with emailI usually reply within 1–2 business days.
Discuss a project