Seven years building reliable systems, from the trading screen to the services behind millions of accounts.
Heilbronn, GermanyEUROPE / BERLIN
01ExperienceFlight log
2016 — Present
Stockbit Sekuritas
Current
Senior Backend Engineer
Dec 2025 — Present
Owning the account and KYC platform behind 2 million brokerage accounts, with 10,000+ new registrations every day.
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Dec 2025 — Present
Design and run event-driven Go services on Kafka, Pub/Sub, and AutoMQ, keeping requests consistent through IPO-day and market-volatility traffic spikes.
Cut on-call incidents by 80% with monitoring, alerting, and diagnostics that catch data discrepancies before they reach a user.
Design high-throughput account and search APIs across PostgreSQL, Redis, Firestore, and OpenSearch.
Go · Distributed systems · Reliability
Stockbit Sekuritas
Engineering Manager, Backend
Apr 2023 — Dec 2025
Led a 9-engineer backend team while staying hands-on in Go. Built the systems, standards, and team behind a growing brokerage.
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Apr 2023 — Dec 2025
Architected the migration of 40+ services to AWS, cutting system latency by 50%.
Spearheaded ISO 27001 compliance and audit logging across every backend system.
Ran technical design reviews and mentored engineers into ownership of their own services.
Architecture · AWS · Engineering leadership
Stockbit
Lead iOS Engineer / iOS Engineer
Jan 2019 — Mar 2023
Built core trading experiences used by 1M+ daily active users, from watchlists and live prices to orders and company details.
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Jan 2019 — Mar 2023
Raised the crash-free rate to 99.8% through memory optimization and thread-safe code.
Scaled the engineering team from 2 to 25 in eight months.
Led a modular architecture initiative for strong domain separation.
iOS · Mobile architecture · Team building
Make School
iOS Instructor
Aug 2017 — Mar 2018
Led the establishment of Make School’s iOS development training program in the Philippines, bringing together developer education, business development, and operations.
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Aug 2017 — Mar 2018
Managed marketing, business development, and developer training operations.
Built trust-based relationships with business partners and clients.
Trained two companies in iOS development through hands-on projects, including an Instagram-style app.
Improved students’ understanding of Swift by 41%, as measured by a student survey.
Swift · iOS education · Partnerships
Drones for Humanity
Co-founder
Jun 2016 — Jul 2017
Co-founded Drones for Humanity and presented a proposal to the Indonesian Disaster Relief Mitigation Agency.
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Jun 2016 — Jul 2017
Led the proposal presentation to the Indonesian Disaster Relief Mitigation Agency.
Worked together with MIT on the initiative.
Startup experience · Co-founding · Partnerships
PLEN
Intern
Jan 2016 — Jun 2016
Assisted in maintaining the PLEN iOS application and refined the 3D-printed design of PLEN robots.
Designed and shipped an iOS finance app that turns PDF statements from any bank, card, or e-wallet into one trustworthy view of spending, with no bank login and no financial data leaving the phone.
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Built an on-device statement parser; unseen bank layouts are learned from an anonymous layout fingerprint, so users’ numbers never leave the device.
Engineered balance-level reconciliation: a transaction counts only when opening balance plus rows equals the closing balance, and anything that doesn’t add up is flagged instead of guessed.
Unified savings, current, credit card, and e-wallet accounts with transfer detection that stops top-ups and card repayments from being double counted, plus strict per-account currency handling.
Shipped automatic categorisation, cash-flow and month-by-month insights, and backfill from historical statements.
Built a finance and tech community platform end to end, across backend, iOS, Android, and web. Members get one profile for events, communities, and opportunities; organisers get one place to review applications.
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Delivered the backend and the iOS, Android, and web clients as one product, owning everything from the data model to the client experience.
Designed GDPR-first data handling on Google Cloud in the EU: CVs are private by default and reach only the hosts a member applies to.
Implemented production-grade auth with password, magic-link, and Google sign-in, short-lived access tokens, rotating refresh tokens, and httpOnly, SameSite cookies.
Enforced server-side, role-based access control on every request, with ownership checks for organisers and community-scoped admin rights.
Hardened the platform with rate-limited sign-in and upload endpoints and in-app abuse reporting.
Server-driven onboarding where the Go backend owns the flow, validation, and state machine. Rule changes ship without a client release.
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Versioned, branching multi-step flows with per-step validation, failure handling, and sessions that pause and resume.
In-progress flow repair asks returning users only for missing information when a new flow version ships.
Idempotent submissions and a maintenance mode keep onboarding reliable.
Go · State machines · Idempotency
GDPR PII Scanner
TechOn Hackathon 2026
A two-stage pipeline for detecting personal information in multilingual documents. Regex and checksum routing handles roughly 90% of documents; a fine-tuned NER model handles the rest.
Explore the project +
Fine-tuned microsoft/mdeberta-v3-base on a synthetic multilingual corpus from a custom BIO-labeled generator.
Raised long-document token recall from 0.239 to 0.749 with sliding-window inference.
Exported to fp16 ONNX and served through Triton Inference Server with dynamic batching and gRPC.
Python · Machine learning · Privacy
03Technical toolkit
Backend
Go, Python, REST APIs, gRPC, microservices
Data
PostgreSQL, Redis, Firestore, OpenSearch
Distributed systems
Kafka, Google Pub/Sub, Redpanda, AutoMQ, event-driven architecture
Reliability
Idempotency, reconciliation, discrepancy detection, on-call, monitoring and alerting
Security
Authentication, authorization, KYC, ISO 27001, GDPR, audit logging
Cloud & observability
AWS, GCP, Kubernetes, Docker, Prometheus, Grafana
AI / GenAI
LLM and agent integration, ML pipelines
04EducationFoundations
Udacity
Blockchain Nanodegree
Sep 2021
Built smart contracts and decentralized applications with Solidity, including ERC-20 tokens, ERC-721 NFTs, a flight insurance dApp, and a supply chain tracker.
